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Home My WebLink AboutHMP 09-05; LAKE CALAVERA TRAILS MASTER PLAN; BIOLOGICAL RESOURCES REPORT REVISED; 2009-01-28M&A #04-101-08 LAKE CALAVERA TRAILS CITY OF CARLSBAD BIOLOGICAL RESOURCES REPORT GENERAL BIOLOGICAL SURVEY, JURISDICTIONAL WETLAND DELINEATION,AND FOCUSED SURVEYS June 8, 2005 Revised May 14, 2007 Revised January 28, 2009 Prepared for: City of Carlsbad Contact: Ms. Liz Ketabian 1200 Carlsbad Village Drive Carlsbad, CA 92008 Phone: (760) 434-2978 Fax: (760) 720-6917 E-mail: lketa@ci.carlsbad.ca.us Prepared by: Merkel & Associates, Inc. Contact: Ms. Amanda K. Gonzales 5434 Ruffin Road San Diego, California 92123 Phone: (858) 560-5465 Fax: (858) 560-7779 E-mail: agonzales@merkelinc.com Amanda K. Gonzales, Senior Biologist/Project Manager Keith W. Merkel, Principal Consultant Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- i TABLE OF CONTENTS SUMMARY..................................................................................................................................................................1 INTRODUCTION.......................................................................................................................................................3 LOCATION ..................................................................................................................................................................3 PROJECT PURPOSE AND DESCRIPTION ........................................................................................................................7 PROJECT SCHEDULE .................................................................................................................................................13 RESPONSIBLE PARTY................................................................................................................................................13 METHODS AND SURVEY LIMITATIONS .........................................................................................................15 LITERATURE REVIEW ...............................................................................................................................................15 SURVEY DATES, TIMES AND CONDITIONS................................................................................................................15 GENERAL BIOLOGICAL SURVEY...............................................................................................................................19 JURISDICTIONAL WETLAND DELINEATION...............................................................................................................19 Wetland Parameters............................................................................................................................................19 Hydrophytic Vegetation.....................................................................................................................................................19 Wetland Hydrology ...........................................................................................................................................................19 Hydric Soils.......................................................................................................................................................................19 Jurisdiction of Wetlands and Waterways.............................................................................................................20 U.S. Army Corps of Engineers..........................................................................................................................................20 California Department of Fish and Game..........................................................................................................................20 THREAD-LEAVED BRODIAEA SURVEY......................................................................................................................21 FOCUSED WET SEASON SAMPLING FOR FEDERALLY LISTED, ENDANGERED VERNAL POOL BRANCHIOPODS..........21 FOCUSED LEAST BELL’S VIREO AND SOUTHWESTERN WILLOW FLYCATCHER SURVEYS.........................................22 FOCUSED COASTAL CALIFORNIA GNATCATCHER SURVEYS.....................................................................................22 SCIENTIFIC NOMENCLATURE ....................................................................................................................................22 SURVEY LIMITATIONS ..............................................................................................................................................22 RESULTS...................................................................................................................................................................23 PHYSICAL CHARACTERISTICS...................................................................................................................................23 BIOLOGICAL RESOURCES .........................................................................................................................................23 Botanical Resources-Flora..................................................................................................................................23 Disturbed Wetland.............................................................................................................................................................24 Open Water........................................................................................................................................................................24 Cismontane Alkali Marsh..................................................................................................................................................24 Coastal and Valley Freshwater Marsh...............................................................................................................................24 Southern Coast Live Oak Riparian Forest.........................................................................................................................27 Mule Fat Scrub..................................................................................................................................................................27 Southern Willow Scrub .....................................................................................................................................................27 Coast Live Oak Woodland.................................................................................................................................................27 Disturbed Valley Needlegrass Grassland...........................................................................................................................27 Diegan Coastal Sage Scrub................................................................................................................................................28 Coastal Sage-Chaparral Scrub...........................................................................................................................................28 Southern Mixed Chaparral.................................................................................................................................................28 Chamise Chaparral ............................................................................................................................................................29 Non-native Grassland........................................................................................................................................................29 Disturbed Habitat...............................................................................................................................................................29 Non-native Vegetation.......................................................................................................................................................29 Urban/Developed...............................................................................................................................................................30 Ephemeral Pools/Swales....................................................................................................................................................30 Jurisdictional Wetlands and Non-wetland Resources .........................................................................................34 Disturbed Wetland.............................................................................................................................................................34 Cismontane Alkali Marsh..................................................................................................................................................34 Coastal and Valley Freshwater Marsh...............................................................................................................................36 Southern Coast Live Oak Riparian Forest.........................................................................................................................36 Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- ii Mule Fat Scrub..................................................................................................................................................................36 Southern Willow Scrub .....................................................................................................................................................36 Coast Live Oak Woodland.................................................................................................................................................37 Non-Wetland Waters of the U.S........................................................................................................................................37 Open Water..................................................................................................................................................37 Drainages.....................................................................................................................................................37 Wetlands Functions and Values.........................................................................................................................................37 Zoological Resources-Fauna...............................................................................................................................38 Invertebrates......................................................................................................................................................................38 Butterflies..........................................................................................................................................................................38 Fish....................................................................................................................................................................................38 Amphibians .......................................................................................................................................................................38 Reptiles..............................................................................................................................................................................39 Birds..................................................................................................................................................................................39 Mammals...........................................................................................................................................................................40 SENSITIVE BIOLOGICAL RESOURCES........................................................................................................................40 Environmentally Sensitive Lands.........................................................................................................................40 HMP Core and Linkage Areas/Wildlife Corridors ............................................................................................................41 Wetlands............................................................................................................................................................................41 Ephemeral Pools/Swales....................................................................................................................................................42 Disturbed Valley Needlegrass Grassland...........................................................................................................................42 Diegan Coastal Sage Scrub................................................................................................................................................42 Coastal Sage-Chaparral Scrub...........................................................................................................................................42 Southern Mixed Chaparral and Chamise Chaparral...........................................................................................................42 Non-native Grassland........................................................................................................................................................43 Rare, Threatened, Endemic, and/or Sensitive Species or HMP Covered Species ...............................................43 Sensitive Flora...................................................................................................................................................................43 Sensitive Fauna..................................................................................................................................................................50 Focused Wet Season Sampling for the Federally Listed, Endangered Vernal Pool Branchiopods.....................59 Focused Least Bell’s Vireo and Southwestern Willow Flycatcher Surveys.........................................................62 Focused Coastal California Gnatcatcher Surveys...............................................................................................62 PROJECT IMPACT ANALYSIS............................................................................................................................64 THRESHOLDS OF SIGNIFICANCE................................................................................................................................64 DIRECT IMPACTS ......................................................................................................................................................64 Upland Vegetation Communities Direct Impacts ................................................................................................65 Jurisdictional Wetlands and Non-wetland Resources Direct Impacts.................................................................66 Sensitive Species Direct Impacts .........................................................................................................................67 INDIRECTIMPACTS...................................................................................................................................................68 MHCP CONSISTENCY ..............................................................................................................................................69 HMP – Section F2 Management and Monitoring Actions...................................................................................69 Habitat Restoration and Revegetation ...............................................................................................................................70 Recreation and Public Access............................................................................................................................................70 Follow Guidelines for Future Recreational Expansion................................................................................70 Develop a Recreational Plan or Review Plans for Compliance...................................................................75 Specific Recreational Activities...................................................................................................................75 Public Access...............................................................................................................................................76 Hydrology and Flood Control............................................................................................................................................78 Species Introduction..........................................................................................................................................................78 Enforcement ......................................................................................................................................................................78 Adaptive Management.......................................................................................................................................................79 Monitoring.........................................................................................................................................................................79 HMP – Section F3 Adjacency Standards.............................................................................................................79 Fire Management...............................................................................................................................................................79 Erosion Control .................................................................................................................................................................79 Landscape Restrictions......................................................................................................................................................79 Fencing, Signs, and Lighting.............................................................................................................................................79 Predator and Exotic Species Control .................................................................................................................................80 CUMULATIVE IMPACTS.............................................................................................................................................80 Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- iii MITIGATION AND MONITORING REQUIREMENTS....................................................................................81 MITIGATION ELEMENT.............................................................................................................................................81 MITIGATION REQUIREMENTS ...................................................................................................................................82 PROTECTION AND NOTICE ELEMENT........................................................................................................................85 MANAGEMENT ELEMENT.........................................................................................................................................85 ADDITIONAL RECOMMENDATIONS................................................................................................................86 GRID GUIDE TO AREAS ON-SITE...............................................................................................................................86 ON SITE REVEGETATION RECOMMENDATIONS.........................................................................................................88 Seed Mixes/Container Plants...............................................................................................................................88 LITERATURE CITED.............................................................................................................................................92 LIST OF TABLES Table 1. Summary of Proposed Trails..........................................................................................................................8 Table 2. Summary of Biological Survey Dates, Times, Conditions and Biologists ...................................................15 Table 3. Summary of Vegetation Communities within the Study Area......................................................................23 Table 4. Flora and Fauna Detected at Survey Points During Pool/Swale Surveys.....................................................31 Table 5. Summary of Jurisdictional Wetlands and Non-wetland Waters/Streambed On-site ....................................34 Table 6. Sensitive Flora Species Identified On-site....................................................................................................44 Table 7. Sensitive Flora Species Not Found On-site but Potentially Present.............................................................45 Table 8. Sensitive Fauna Species Observed On-site...................................................................................................51 Table 9. Sensitive Fauna Species Not Found On-site but Potentially Present......................................................53 Table 10. Habitat Physical/Hydrological Conditions and Fairy Shrimp Detection Rate at Survey Points.................59 Table 11. Quantitative Summary of Upland Vegetation Community Direct Impacts from the Proposed Project......65 Table 12. Quantitative Summary of Jurisdictional Wetlands and Non-Wetland Resources Direct Impacts from the Proposed Project..................................................................................................................................................66 Table 13. Mitigation Ratios for Impacted Vegetation Communities and Jurisdictional Habitats...............................82 Table 14. Coastal Valley Freshwater Marsh Plant Materials......................................................................................88 Table 15. Coastal Valley Freshwater Marsh Hydro-seed Species..............................................................................88 Table 16. Southern Coast Live Oak Riparian Forest Plant Materials.........................................................................88 Table 17. Southern Willow Scrub Plant Materials .....................................................................................................89 Table 18. Native Grassland Plant Materials ...............................................................................................................89 Table 19. Native Grassland Hydro-seed Species........................................................................................................89 Table 20. Diegan Coastal Sage Scrub Plant Materials................................................................................................90 Table 21. Diegan Coastal Sage Scrub Hydro-seed Species........................................................................................90 LIST OF FIGURES Figure 1. Project Vicinity Map.....................................................................................................................................4 Figure 2a. Habitat in HMP Core and Linkage Areas....................................................................................................5 Figure 2b. Habitat in Conservation Areas ....................................................................................................................6 Figure 3a. Proposed Trail System Map ........................................................................................................................9 Figure 3b. Proposed Barrier Fencing – Wood Pole Fencing ......................................................................................10 Figure 3c. Boardwalk/Puncheon Structure.................................................................................................................12 Figure 4. Biological Resources Map...........................................................................................................................25 Figure 5. Slope Analysis Map ....................................................................................................................................26 Figure 6. Wetland Delineation Map ...........................................................................................................................35 Figure 7. Ephemeral Pool Survey Point Locator Map................................................................................................60 Figure 8. Grid Guide to Areas On-site........................................................................................................................87 Figure 9. Suitable Areas for Habitat Mitigation and Trail Revegetation....................................................................91 Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- iv LIST OF APPENDICES Appendix 1. Flora Species Observed On-site Appendix 2. Distant/Internal Photo Points of the Study Area Appendix 3. Wetland Data Forms Appendix 4. Wetlands Photo Points Appendix 5. Fauna Species Observed or Detected On-site Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 1 LAKE CALAVERA TRAILS CITY OF CARLSBAD BIOLOGICAL RESOURCES REPORT GENERAL BIOLOGICAL SURVEY, JURISDICTIONAL WETLAND DELINEATION, AND FOCUSED SURVEYS Merkel & Associates, Inc. June 8, 2005 Revised May 14, 2007 Revised January 28, 2009 SUMMARY Biological surveys of the Lake Calavera Trails study area were conducted by Merkel & Associates, Inc. (M&A) between 2002 to 2006 to identify the biological resources present and analyze biological impacts in a defined study area, within which formal trail implementation and regulation around Lake Calavera are proposed. This includes improvements and management of recreational trails and installation of trail amenities around the lake that would accommodate hikers and non-motorized bicyclists. M&A mapped the vegetation on-site, performed a jurisdictional wetland delineation, and conducted protocol surveys for the federally listed, endangered vernal pool branchiopods [i.e., San Diego fairy shrimp (Branchinecta sandiegonensis)], federally and state listed, endangered least Bell’s vireo (Vireo bellii pusillus), federally listed, endangered southwestern willow flycatcher (Empidonax traillii extimus), and federally listed, threatened coastal California gnatcatcher (Polioptila californica californica). In addition, M&A biologists surveyed for the federally listed, threatened thread-leaved brodiaea (Brodiaea filifolia). Eighteen vegetation communities were mapped within the study area. They include: disturbed wetland, open water, cismontane alkali marsh, coastal and valley freshwater marsh, southern coast live oak riparian forest, mule fat scrub, southern willow scrub, coast live oak woodland, disturbed valley needlegrass grassland, Diegan coastal sage scrub, coastal sage-chaparral scrub, southern mixed chaparral, chamise chaparral, non-native grassland, disturbed habitat, non-native vegetation, urban/developed land, and non-wetland waters of the U.S./streambeds. Seventeen sensitive species were identified within the Lake Calavera Trails study area. All of the floral species have a state status of special plant and include: clay-field goldenbush (Isocoma menziesii var. decumbens), western dichondra (Dichondra occidentalis), California adolphia (Adolphia californica), and spiny rush (Juncus acutus ssp. leopoldii). The fauna species include western monarch (Danaus plexippus), white-tailed kite (Elanus leucurus), northern harrier (Circus cyaneus), sharp-shinned hawk (Accipiter striatus), Cooper's hawk (Accipiter cooperii), Nuttall's woodpecker (Picoides nuttallii), loggerhead shrike (Lanius ludovicianus), coastal California gnatcatcher, California thrasher (Toxostoma redivivum), yellow warbler (Dendroica petechia), yellow-breasted chat (Icteria virens), and tricolored blackbird (Agelaius tricolor). Please note that the listing and sensitivity status is discussed within the body of the report. A total of 10 coastal California gnatcatchers were also detected within the study area during the protocol surveys. Due to seasonal constraints on plumage assessment, we assigned only tentative male/female pair status to them; however, the 10 comprise potentially 4 pairs and 2 unpaired individuals. No thread-leaved brodiaea was detected on-site. In addition, no vernal Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 2 pool branchiopods, least Bell’s vireos, or southwestern willow flycatchers were identified within the study area. The City of Carlsbad (City) has developed and approved a Habitat Management Plan for Natural Communities (Adopted 2004) (HMP) and projects located within the City’s jurisdiction will be subject to the finalized, adopted version of the plan. The entire project site is located within a proposed hardline conservation area of the City’s HMP preserve system, excluding a small area of native habitat within the southern portion of the site which is located completely outside of the conservation area. With the final approval of the HMP in 2004, the Lake Calavera Project site receives the same conservation status as existing hardline areas and thus is designated as open space (Adopted 2004, Section D, page D-14). The Lake Calavera Trails project would result in impacts to the following vegetation communities: disturbed wetlands, coastal and valley freshwater marsh, southern coast live oak riparian forest, mule fat scrub, southern willow scrub, non-wetland waters of the U.S./streambed, disturbed valley needlegrass grassland, Diegan coastal sage scrub, southern mixed chaparral, chamise chaparral, non- native grassland, disturbed habitat, and non-native vegetation. However, only impacts to disturbed wetlands, coastal and valley freshwater marsh, southern coast live oak riparian forest, mule fat scrub, southern willow scrub, non-wetland waters of the U.S./streambed, disturbed valley needlegrass grassland, Diegan coastal sage scrub, southern mixed chaparral, chamise chaparral, and non-native grassland are considered significant. In addition, the project will impact sensitive flora and fauna species. Implementation of the project mitigation measures shall be required to reduce impacts to a level below significance and ensure consistency with the Multiple Habitat Conservation Program (MHCP). Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 3 INTRODUCTION Merkel & Associates, Inc. (M&A) performed a general biological survey, jurisdictional wetland delineation, and focused surveys for the federally listed, endangered vernal pool branchiopods [i.e., San Diego fairy shrimp (Branchinecta sandiegonensis) and Riverside fairy shrimp (Steptocephalus woottoni)], federally and state listed, endangered least Bell’s vireo (Vireo bellii pusillus), federally listed, endangered southwestern willow flycatcher (Empidonax traillii extimus), and federally listed, threatened coastal California gnatcatcher (Polioptila californica californica) for the Lake Calavera Trails project, at the request of Ms. Liz Ketabian from the City of Carlsbad (City). In addition, M&A biologists surveyed for the federally listed, threatened thread-leaved brodiaea (Brodiaea filifolia). The purpose of these surveys was to record and map the biological resources on-site, quantify the impacts that would result from formal implementation and maintenance of recreational trails and trail amenities within the Lake Calavera Trails study area, and recommend measures to avoid, minimize, and/or mitigate significant project impacts consistent with the California Environmental Quality Act (CEQA) and the Habitat Management Plan for Natural Communities in the City of Carlsbad (Adopted 2004) (HMP). LOCATION The approximate 262-acre Lake Calavera Trails site is located in the northeastern corner of the City of Carlsbad, San Diego County, within unsectioned lands of the Agua Hedionda land grant on the southeastern portion of the United States Geological Survey (USGS) 7.5’ San Luis Rey, California Quadrangle (Figure 1). Locally, the project site is situated within the City’s HMP preserve system and specifically within the City’s Core 3 Focused Planning Area (FPA) (Figures 2a and 2b). The entire project site is located within a proposed hardline conservation area, excluding a small area of native habitat within the southern portion of the site, which is located completely outside of the conservation area. Upon approval of the HMP in 2004, the Lake Calavera Project site now receives the same conservation status as existing hardline areas and thus is designated as open space (Adopted 2004, Section D, page D-14). The study area is bound to the north and east by residential development (City of Oceanside) and to the west by College Boulevard. Open space lands of Robertson Ranch lie just west of College Boulevard. To the south of the study area is Calavera Nature Preserve, Cerro de la Calavera (Mount Calavera), and open space lands owned by the California Department of Fish and Game (CDFG), all of which are encompassed within an existing hardline conservation area. The Lake Calavera Trails study area extends from just west of the Lake Calavera dam to the eastern boundary of the City. Access to the study area can be obtained using College Boulevard from Highway 78. M&A #04-101- Figure 1 Source: USGS 7.5' San Luis Rey, CA Quadrangle Lake Calavera Trails Project Vicinity Map N EW S Merkel & Associates, Inc. 1" = 2000' Project Site ... 0 : .,..J ., F _-I • '\,.. • ' ,.') I i• : l •o:,• • ., I !: . •• ~ . . ,_ ' .. II i\ ! (: 1' .._ r -"-Ii• ~, .... ""-.,. -,... ~ =.:::i::-= -=J ,. II r. ' I Merkel & Associates, Inc. M&A #04-101- Habitat in HMP Core and Linkage Areas Lake Calavera Trails Figure 2a N EW S CORE #3 CORE #4 CORE #2 LINK C LINK B LINK A Focus Planning Areas HMP Core Linkage Study Area Other 1" = 2000'* Merkel & Associates, Inc. M&A #04-101- Habitat in Conservation Areas Lake Calavera Trails Figure 2b N EW S 1" = 2000' Existing Hardline Conservation Areas Proposed Hardline Conservation Areas Proposed Standards Areas Study Area Conservation Areas Other Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 7 PROJECT PURPOSE AND DESCRIPTION The Lake Calavera Trails project consists of formal trail implementation and regulation around Lake Calavera and would accommodate hikers and non-motorized bicyclists. This includes improvements and management of recreational trails and installation of trail amenities around the lake (Figure 3a). Currently, there is a substantial non-official trail system throughout the study area that has been created by various human activities. This informal activity has resulted in the uncontrolled loss of habitat via trail creation and widening. The proposed project would prevent this uncontrolled loss of habitat through the implementation of an improved and managed trail system designed to follow portions of the existing trail system. Specific trails would be enhanced and widened, while others would be closed on a permanent basis using wood pole barrier fencing (Figure 3b). The wood pole fencing would be installed at trail junctions to identify permanently closed trails and along designated trails to ensure that users remain within trail boundaries. Where needed, all weather, “Trail Closed” signs would be posted on the barrier fencing to prevent access. Public access would be obtained through a series of 12 access points that consist of connections to either 1) street or sidewalk, 2) other trail systems, or 3) city wide trails. Five of these connections would accommodate maintenance and utility vehicles. The other proposed trail amenities are: 1. Information Kiosk: The kiosks would consist of approximate 8-foot tall, all weather, 2-panel, roofed billboards that include specific and general information such as trail regulations, a trail system map, and information about the surrounding habitat; 2. View Point/Interpretative Signage: These approximate waist high monuments would be in place to describe the surrounding resources and where possible, a small bench (4 by 4-foot pad) would be installed next to the signage; 3. Trail Markers: A simple recycled plastic post (4-foot post) designating approved trail use and directional arrows would be placed at all access points and trail junctions where needed to direct users to stay on the designated trail; 4. Trail Regulation Sign: All access points, excluding those with kiosks would be equipped with a trail regulation sign (T-post with metal sign). Please refer to the Responsible Party section of this report for a list of general trail regulations; 5. Litter Receptacle/Dog Waste Station: These stations would consist of a trashcan and disposal bags to ensure the proper disposal of trash and dog feces. Most access points and several designated locations throughout the site will be equipped with these stations; 6. Picnic Tables: Two picnic tables (12 by 6-foot pad) would be placed on-site, one on the south and another on the north side; and 7. Portable Restroom: One portable restroom (8 by 8-foot pad) would be placed within disturbed habitat just off the Carlsbad Municipal Water District easement road within the western most portion of the site. The restroom would be handicap assessable, placed on a concrete pad to provide stabilization and enclosed by a tailored shed structure made of recycled non-combustible materials. Installation of all signage would follow the City’s Trail Signage Guidelines and Standards (2003). In addition, all proposed trail amenities would be placed within the proposed trails. The trails would be enhanced and widened in accordance with the HMP (Section F2 and F3) and would be designated as Type A, Type B, and Type C trails. Please refer to the MHCP Consistency section of this report for further details of compliance. Table 1 is a summary of the information provided within this report and specifically within the MHCP Consistency section. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 8 Table 1. Summary of Proposed Trails Trail Type1 Average Existing Width2 Proposed Width3 Vertical Clearance Anticipated Tread Surface Anticipated Trail Grade and Slope Type A–Hikers/Bicyclist (existing utility easement roads). Open year-round. Maintenance restrictions due to sensitive species. 10-12’ 10-12’ 8’ Native Soils and Decomposed Granite Minimum 2-5% cross slope. Installation of waterbars may be required along the eastern boundary of the site due to the steepness of the slope. Type B–Hikers/Bicyclist (dam). Open year-round. 8-12’ NA NA Decomposed granite 2-5% cross slope. It should be noted that the Lake Calavera Dam Improvements project, under the direction of the Carlsbad Municipal Water District has improved the dam access path and associated spillway structures (City of Carlsbad 2008 pers. comm.). Type B–Hikers/Bicyclists Open year-round. Maintenance restrictions due to sensitive species. 2-12’ 4-8’ 8’ Native Soils and Boardwalk 2-5% cross slope. Three segments of boardwalk are proposed along this type of trail. All boardwalks would be 6 feet in width. The installation of waterbars may be required within the 2 north-south directed trails located within the south-central portion of the site. Type C–Hikers Only Open year-round. Maintenance restrictions due to sensitive species. 2-6’ 2-6’ 8’ Native Soils and Wood Timber Stair 2-5% cross slope. One wood timber stair structure would be constructed at the northeastern terminus of this trail at the Lake Boulevard connection. 1 Certain trails may be closed on a temporary basis at the discretion of the City Parks and Recreation Departments and/or Center for Natural Lands Management (City designated Land Manager of the Lake Calavera site). 2 This is a representation of the average width of trails found throughout the project site. Thus, some trails may be wider or narrow than what is stated here. 3 Implemented trail width would depend on the following: 1) sensitivity of the surrounding vegetation and 2) ability of trail users to safely utilize the trail. Nonetheless, the implemented trail width would not exceed the maximum proposed width. M&A #04-101- Merkel & Associates, Inc. Lake Calavera Trails Figure 3a N EW S Proposed Trail System Map $T $T $T $T $T $T $T $T $T $T $T$T $T $T $T $T $T $T $T $T $T$T $T #³ $T$T $T$T$T $T $T $T $T $T SkyHavenLn. Lake Blvd. Ta m arac k A ve. Other Study Area/City Owned Land Type A (Hikers/Bicyclists 10-12 feet wide) Existing Water District/SDG&E Rd. 200 0 200 400 Feet Proposed Trail Amenities $T Access Point Connection to Street/Sidewalk Access Point Connection to Other Trail Systems $T Litter Receptacle / Dog Waste Station$T $T Information Kiosk Access Point Connection to City Wide Trails $T $T Picnic Table View Point/Interpretive Signage Type B (Hikers/Bicyclists 4-8 feet wide) Proposed Trails Boardwalk - 6 feet wide $T Official Offsite Trail System Barrier Fencing Along Trail Wood Timber Stair#³ $T Portable Restroom # Carlsbad Municipal Water District Easement Road # CDFG Owned Trails # SDG&E Easement Road # SDG&E Easement Road # Carlsbad Municipal Water District Easement Road # City of Oceanside Trail Type C (Hikers only 2-6 feet wide) # CDFG Owned Trails CDFG Owned Land Oak Riparian Park # Calavera Hills Trail 2008 Aerial Image from City of Carlsbad SDG&E Right-of-Way ,,, ,,, ,,, ··:\ ,, -t1· <1 □ N ~ D □ Merkel & Associates, Inc. M&A #04-101- Proposed Wood Pole Barrier Fencing Lake Calavera Trails Figure 3b N EW S 0 . _ WOOD POL E FEN CE • SCALE : NONE * 4" DIAMETER ROUND DOUGLAS FIR POST W/BEVEL ED TOP (4-5 DEGREE) 3" DIA. ROUND PRESSURE TR EATED WOOD RAIL Fl ISH GRADE Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 11 Type A trails are currently utilized as easement roads for San Diego Gas and Electric (SDG&E) as well as the Carlsbad Municipal Water District, and cannot be eliminated nor can they be closed seasonally. These existing utility access routes are graded from 10 to 12 feet wide and are either paved or consist of native soils. Type A trails would accommodate both hikers and bicyclists and would remain approximately 10 feet wide. It should be noted that a 100-foot firebreak along the northern boundary of the site (between the City of Carlsbad and Oceanside) is graded/disced yearly as required by the City Fire Marshall. The firebreak was observed during a September 2006 field meeting to be centered over the existing Carlsbad Municipal Water District road (Type A trail); however, per the City Fire Marshall, the correct location for the firebreak is 100 feet from the northern boundary of the project site and spans from the western end of Sky Haven Lane eastward to the trail/street connections at Lake Boulevard (City of Carlsbad December 2008 pers. comm.) (refer to Figure 9). Type B trails would be utilized by pedestrians and bicyclists and have a surface of native soils, decomposed granite, or boardwalk. The current widths of the trails range from approximately 2 to 12 feet. Upon implementation of the project, the standard trail width would decrease to an average of 4 to 8 feet. This width includes a horizontal clearance of 0.5-foot or 1-foot on either side. The width of the horizontal clearance depends on the sensitivity of the surrounding vegetation. In addition, where vegetation hangs over the trail, a vertical clearance of 8 feet would be implemented. Three segments of this trail type cross over a drainage or are located within an area that receives seasonal saturation; thus, 3 segments of boardwalk are proposed to be constructed to enable safe year around crossing by trail users. From shortest to longest, the length of boardwalk required at each segment are 15, 290, and 767 feet; the width and horizontal clearance of each boardwalk would be 6 and 8 feet, respectively. This width includes a wood curb along the boardwalk to prevent users from stepping off the boardwalk (Figure 3c). It should be noted that the construction of all boardwalks would require an impact width of 8 feet; thus, 2 feet are considered temporary impacts. All proposed locations of boardwalks are currently in areas of high user traffic where the users have constructed unsafe bridges from driftwood and nearby debris. In addition, during months of high rainfall, users avoid saturated areas by trampling on adjacent native vegetation. The construction of boardwalks would prevent trail widening and ensure that users stay within the designated trail. All of the boardwalks are necessary in that they provide year around access to the Lake Calavera site. Specifically, the longest segment of boardwalk located within the northeastern corner of the site is necessary for the following reasons: 1) it provides a direct connection (easy level hike) for users to travel from the City of Carlsbad trail system to the City of Oceanside trail and park system, 2) the trail is located in a visually pleasing area that supports a diversity of habitats, and 3) it is an established trail and highly utilized by the public that would continue to be used in its existing condition if not improved and formalized. Type C trails would be utilized by pedestrians only and have a surface of native soils. The current widths of the trails range from approximately 2 to 6 feet. Upon implementation of the project, the standard widths would remain at 2 to 6 feet, which includes a horizontal clearance of 0.5-foot or 1- foot on either side. The sensitivity of the surrounding vegetation would determine the implemented width of the trail; thus, all trail widths would be kept at a minimum but require a width that would accommodate hikers safely. A wood timber staircase, 6 feet in width and approximately 25 to 30 feet in length (toe of slope to sidewalk) would be constructed at the northeastern terminus of the Type C trail. Although there is little erosion at this connection, the trail is at a steep incline and thus requires a stairway. Construction of the staircase would require a permanent impact width of 8 feet. Merkel & Associates, Inc. M&A #04-101- Boardwalk/Puncheon Structure Lake Calavera Trails Figure 3c N EW S Type 3 Puncheon The th"rd type of puncheon als,o uses s.teepers to s • pport lhe structure, but the mate ial is sawn timber or lumber, which should be tre,at,ed with we.ad preservative (figure 48). This construction is popular at more accessible sites. where materials are easier to transport The ongevity of treated wood and the environmental consequenoes and llalbor of cutting trees onsi1e m:ake the use of' sawri, treated timtiers increasingly popular at remote sites as welt Helicopters. p,ackstock, all-erra n vehicles, and workef"S carry in the materials. Figure 48-A third type of puncheon_ This type of puncheon is constructed from preservative-treated limbers. The ai e 'bolt d to the :inside of each stringer helps k~;i½p the stringers kom mtting1 by cone@ntrating sere~" hole::. and ~si.oci:ated r:ol i11 the easily replaced nallers instead of ttie stringers. The sleepers •can be elther 6-by 6-or 8-by 8-in,ch-square timbers p.Jiaced as previo,usly described. Two or three stringers rest on the s'leepers and may be toenailed to the sleepers and bolted or nailed to the stringer in the next s:pan. The stringers may also be attached to the sleepers with steel, angles and extended (can;ilevefed) a short distance beyond the sleepers_ The si.ze of the stringers is detemi·ned by the maximum weight they can be ex,pec:ted to s.uppoi'it, which may be the snow load in snow country. For foot trails, usually the size of the stringers is calculated to support a 1 weig t of 100 pounds per square foot, the maximum. weight expected for trail us,ers standing o -o,ne section of trail. Heav1ier, wider 1puncheon ,is needed for honl.e ,and mule traffic. On foot trails, the tread is often 2 t,y 6, 2 by 8 , or 2 by 10 lumber nailed to the stringers. When three stri :gers. are used, do riot nail to the center stringer. The nails work the"rway ,out and pos,e a t:ripping hazard. The stringers are tile rnost expensive and most difficult items to bring to the• site,_ Do everything you can t.o extend their useful life: usua'lly this means keeping them dry. * Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 13 Equipment to be used on-site for construction of the trails and trail amenities includes: small Kubota tractors, belly dump truck for hauling decomposed granite, and pick up trucks for hauling laborers and hand tools (i.e., wheel barrows, shovels, picks, pruning equipment, etc.). All equipment would be stored off-site at the City Parks Department storage yard or with volunteers. Decomposed granite would be brought on-site and stock piled for short periods of time and used up as needed. The drop off areas may change depending on which part of the site volunteers would be working on and also accessibility for trucks delivering the materials. All drop off areas would be located within currently disturbed habitat. The trail improvements would not utilize over 500 cubic yards of decomposed granite material. PROJECT SCHEDULE Trail improvements and installation of trail amenities are expected to begin upon approval of the project and receipt of all applicable permits and extend for approximately 2 years. Trail improvement work would begin along the northern boundary of the study area and continue southward. All work is expected to occur during daylight hours. RESPONSIBLE PARTY The Lake Calavera Trails project site is owned by the City and will be managed by the City Parks and Recreational Department. The elements of management are: 1. Project Construction: City Parks and Recreation Department with assistance from a managed volunteer program; 2. Trail Maintenance: City Parks and Recreation Department with assistance from a managed volunteer program and Center for Natural Lands Management (City designated Land Manager); 3. Management of Preserved/Natural Lands: Center for Natural Lands Management (City designated Land Manager); and 4. Enforcement of Trail Regulations: City Police. It is anticipated that 95 percent of trail improvements and maintenance would be performed by volunteers, under the direction of the City Parks and Recreation Department. Volunteers would be required to follow the Handbook for Citywide Trail Volunteers (City 2003, currently being updated), which covers the following: safety of the volunteer and general public; administrative responsibilities; limitations on tasks a volunteer can perform; and Volunteer Standards and Ethics. It also covers the City’s responsibilities to a volunteer and includes copies of the forms (maintenance report/timesheets, volunteer agreement, etc.) that volunteers are needed to complete periodically. In addition, volunteers are required to receive trail maintenance training at Trail School or at the San Diego County training program. The training follows National Park Service standards for trail maintenance and construction. Maintenance of the Lake Calavera Trails site would follow the Citywide Trail Maintenance Plan (City 2002). Trail signage use and installation would follow the City’s Trail Signage Guidelines and Standards (City 2003). Final trail signage language and temporary closure of trails (if determined necessary) would be under the direction of the Parks/Recreation Department and/or Land Manager. Maintenance of the trails includes (but not limited to) trash removal, detection/control of erosion, detection/control of trail widening, and detection of disturbance to adjacent natural habitat. If determined necessary (ex. erosion or trail widening), the City Parks and Recreation Department and/or Land Manager would temporarily close trails using barrier fencing until deemed suitable for Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 14 use. Currently, the proposed project includes installation of barrier fencing where needed, such as at trail junctions and along segments of designated trails. Implementation of additional barrier fencing may occur in the future if determined necessary. A map of the trail system and standard regulations for trail use would be posted within the informational kiosks and consist of (but not be limited to): 1) Stay on the designated trail; 2) Put litter in containers provided. Do not leave or deposit any litter. CMC 11.32.030(1); 3) Pick up after your pet. CMC7.08.010, SDCC 62.670; 4) All pets must be on a hand-held leash under 6’ long. CMC Sec. 7.08.010, SDCC Sec. 62.669; 5) Bicycle riders 17 years and younger must wear a helmet. V.C. 21212; 6) Bicycles should be driven at safe speeds considering all other trail users; 7) Ride or walk on the right side when traffic is coming from the opposite direction or when someone signals they would like to pass; 8) Motorized vehicles and horses are not allowed on this trail. (CMC Secs. 11.32.030(11), 11.32.030(19); 9) No smoking, fires or firearms. CMC Secs. 11.32.110; 10) Report accidents or emergencies to the Police Department (Dial 911); and 11) Report trails maintenance problems or vandalism to the City of Carlsbad Parks Department at 760-434-2824. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 15 METHODS AND SURVEY LIMITATIONS LITERATURE REVIEW Existing literature pertaining to the project area was reviewed prior to the initiation of the field survey. This literature review included examination of the City’s HMP Subarea Plan and recent California Natural Diversity Database (CNDDB) records for the project vicinity. In addition, M&A biologists surveyed a portion of the Lake Calavera Trails study area as part of the Lake Calavera Improvements project (M&A 2002, revised 2003; Addendum 2006). The previous study area consisted of approximately 94 acres, including the lake and the area surrounding the lake. The results from the previous survey are referenced throughout this report. In conjunction with the previous M&A Lake Calavera report, Planning Systems created a Wetland Habitat Restoration, Maintenance, and Monitoring Program (Planning Systems 2006). Applicable information was used to assess the presence or potential for presence of sensitive habitats and species within the project study area. SURVEY DATES, TIMES AND CONDITIONS M&A biologists conducted the general biological survey, jurisdictional wetland delineation, and focused surveys for vernal pool branchiopods, least Bell’s vireo, southwestern willow flycatcher, and coastal California gnatcatcher between January 2002 and July 2005 (Table 2). In addition, M&A biologists searched for the federally listed, threatened thread-leaved brodiaea. An agency field meeting took place in September 2006 in response to the comments received on the Mitigated Negative Declaration (MND) for the Lake Calavera Trails Master Plan. The purpose of the meeting was to walk the proposed trail system and demonstrate the analysis used for determining trail improvements to existing trails and criteria used for closing many existing trails. In attendance were representatives of U.S. Fish and Wildlife Service (USFWS), CDFG, City of Carlsbad, and M&A. Table 2.Summary of Biological Survey Dates, Times, Conditions and Biologists Date Survey1 Time Conditions2 (start-end) Biologist(s)3 01/23/02 General Biological Survey (previous Lake Calavera study) 0930-1600 Weather: 0% cc Wind: 0-2 BS Temp.: 60 F ERL, KLI 01/31/02 Jurisdictional Wetland Delineation (previous Lake Calavera study) 1100-1600 Weather: 0% cc Wind: 0-2 BS Temp.: 68 -70F KLI, VAL, KAA 02/12/02 General Biological Survey (previous Lake Calavera study) 0730-1230 Weather: 0% cc Wind: 0-2 BS Temp.: 48 -70F GLR 02/14/02 General Biological Survey, Jurisdictional Wetland Delineation (previous Lake Calavera study) 1000-1630 Weather: 10% cc Wind: 0-2 BS Temp.: 66 -70F KLI, VAL, KAA Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 16 Date Survey1 Time Conditions2 (start-end) Biologist(s)3 02/15/02 Jurisdictional Wetland Delineation (previous Lake Calavera study) 1100-1600 Weather: 0% cc Wind: 0-2 BS Temp.: 68 -72F VAL, KAA 02/21/02 General Biological Survey (previous Lake Calavera study) 0830-1500 Weather: 0% cc Wind: 0-2 BS Temp.: 63 -90F GLR, KLI 03/05/02 General Biological Survey (previous Lake Calavera study) 0830-1200 Weather: 0%-10% cc Wind: 0-5 BS Temp.: 63 -70F GLR, KLI 03/20/02 Bathymetry (previous Lake Calavera study) 1000-1630 Weather: 0%-10% cc Wind: 0-2 BS Temp.: 66 -70F KJC, KLI 05/18/04 Vireo Survey 1, Willow Flycatcher Survey 1 (previous Lake Calavera study) 0735-1005 Weather: 75%-45% cc Wind: 1 BS Temp.: 72°F BLP 05/28/04 Vireo Survey 2 (previous Lake Calavera study) 0830-1100 Weather: 0% cc Wind: 0-3 BS Temp.: 63°F MAB 06/08/04 Vireo Survey 3, Willow Flycatcher Survey 2 (previous Lake Calavera study) 0735-0945 Weather: 100% cc Wind: 1-2 BS Temp.: 62°F BLP 06/18/04 Vireo Survey 4 (previous Lake Calavera study) 0800-1100 Weather: 100% cc Wind: 0-2 BS Temp.: 65 -68°F MAB 06/29/04 Vireo Survey 5 (previous Lake Calavera study) 0645-0815 Weather: 80% cc Wind: 1 BS Temp.: 62 -63°F AKG, RAW 06/30/04 Willow Flycatcher Survey 3 (previous Lake Calavera study) 0800-1000 Weather: 100% cc Wind: 0 BS Temp.: 62°-66°F GLR 07/07/04 Willow Flycatcher Survey 4 (previous Lake Calavera study) 0815-1015 Weather: 100% cc Wind: 0 BS Temp.: 64°-65°F GLR 07/09/04 Vireo Survey 6 (previous Lake Calavera study) 0900-1100 Weather: 30%-10% cc Wind: 2 BS Temp.: 73°-78°F MAB 07/17/04 Willow Flycatcher Survey 5 (previous Lake Calavera study) 0730-0930 Weather: 50%-10% cc Wind: 0 BS Temp.: 62°-73°F GLR 07/19/04 Vireo Survey 7 (previous Lake Calavera study) 0745-1015 Weather: 90%-0% cc Wind: 0 BS Temp.: 65°-74°F AKG Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 17 Date Survey1 Time Conditions2 (start-end) Biologist(s)3 07/29/04 Vireo Survey 8 (previous Lake Calavera study) 0715-0945 Weather: 100%-50% cc Wind: 1-3 BS Temp.: 65°-72°F AKG 11/04/04 General Biological Survey 0810-1630 Weather: 90%-0% cc Wind: 0 BS Temp.: 65 -70F AKG, BLP 11/05/04 General Biological Survey 0920-1500 Weather: 25%-90% cc Wind: 0-1 (BS) Temp.: 66 -68F AKG, DLT 11/10/04 Gnatcatcher Survey 1 0750-1140 Weather: 70%-40% cc Wind: 0-2 BS Temp.: 64 -68F GLR, RRA, AKG, BLP, DLT 11/18/04 Gnatcatcher Survey 2 0730-1120 Weather: 0% cc Wind: 0 BS Temp.: 60 -72F GLR, RRA, ELE, BLP 11/19/04 Jurisdictional Wetland Delineation 0920-1530 Weather: 99%-0% cc Wind: 1-2 BS Temp.: 62 -68F AKG, BLP 11/29/04 Gnatcatcher Survey 3 0800-1152 Weather: 0% cc Wind: 1-3 BS Temp.: 55 -66F GLR, ELE, BLP 12/09/04 Jurisdictional Wetland Delineation 0915-1330 Weather: 0% cc Wind: 0-1 BS Temp.: 58 -72F BLP, DLT 1/14/05 Gnatcatcher Survey 4 0655-1125 Weather: 75% cc Wind: 0 BS Temp.: 52 -67F MAB, RRA, AKG 01/17/05 General Biological Survey 1305-1510 Weather: 5% cc Wind: 0-1 BS Temp.: 70 F AKG, SRR 02/07/05 Vernal Pool Branchiopod Wet Season Survey 1 1015-1430 Weather: 50%-40% cc Air Temp.: 17°-21°C Water Temp.: 14°-17°C ELE, SRR 02/28/05 Vernal Pool Branchiopod Wet Season Survey 2 0830-1400 Weather: 60%-10% cc Air Temp.: 18°-21°C Water Temp.: 14.5°-21°C SRR 03/13/05 Vireo Survey 1 0730-0950 Weather: 100%-80% cc Wind: 0-3 BS Temp.: 63°-65°F BLP, RAS 03/14/05 Vernal Pool Branchiopod Wet Season Survey 3 0930-1115 Weather: 50%-10% cc Air Temp.: 18°-19°C Water Temp.: 18°-18°C ELE, SRR 04/11/05 Vernal Pool Branchiopod Wet Season Survey 4 0915-1045 Weather: 70%-65% cc Air Temp.: 21°-24°C Water Temp.: 16°-19°C ELE, SRR Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 18 Date Survey1 Time Conditions2 (start-end) Biologist(s)3 04/17/05 General Biological Survey, Thread-leaved Brodiaea Survey 1 1430-1700 Weather: 10% cc Wind: 0-1 BS Temp.: 60-55 F AKG 04/27/05 Vernal Pool Branchiopod Wet Season Survey 5 1415-1600 Weather: 95%-100% cc Air Temp.: 20°-20°C Water Temp.: n/a ELE, RAW 05/04/05 Vireo Survey 2 0720-1000 Weather: 100% cc Wind: 1-0 BS Temp.: 60°-64°F AKG 05/12/05 Vireo Survey 3, Thread-leaved Brodiaea Survey 2 0730-0955 Weather: 0% cc Wind: 0-1 BS Temp.: 60°-70°F AKG 05/13/05 Vernal Pool Branchiopod Wet Season Survey 6 0930-1045 Weather: 15%-10% cc Air Temp.: 18°-21°C Water Temp.: n/a ELE, SRR 05/23/05 Vireo Survey 4, Willow Flycatcher Survey 1 0700-0900 Weather: 100% cc Wind: 0 BS Temp.: 60°F BLP 06/08/05 Vireo Survey 5, Willow Flycatcher Survey 2 0655-0950 Weather: 80%-10% cc Wind: 0 BS Temp.: 65°-73°F BLP 06/23/05 Vireo Survey 6, Willow Flycatcher Survey 3, Thread-leaved Brodiaea Survey 3 0630-0845 Weather: 100% cc Wind: 1 BS Temp.: 68°-70°F BLP 07/06/05 Vireo Survey 7, Willow Flycatcher Survey 4 0715-0925 Weather: 100%-30% cc Wind: 1-0 BS Temp.: 67°-80°F BLP 07/16/05 Vireo Survey 8, Willow Flycatcher Survey 5 0705-0915 Weather: 100%-20% cc Wind: 0-1 BS Temp.: 68°-74°F AKG, BLP 06/22/06 Vegetation Ground-Truthing (previous Lake Calavera study) 0700-0830 Weather: 100% cc Wind: 0-1 BS Temp.: 62°-65°F AKG, RRA 09/25/06 Field Meeting with Agency and City Staff 1315-1700 Weather: 5%-15% cc Wind: 1 BS Temp.: 72°F AKG 1 “Previous Lake Calavera study” is in reference to the Lake Calavera Dam Improvements Project 2 cc=cloud cover; BS=Beaufort Scale; F=Fahrenheit; C=Celsius 3 Biologists: AKG = Amanda K. Gonzales, BLP = Bonnie L. Peterson, DLT = Daylon L. Teel, ELE = Edward L. Ervin, ERL = Eric R. Lichtwardt, GLR = Geoffrey L. Rogers, KAA = Kara A. Altvater, KLC = Kevin J. Cull, KLI = Kyle L. Ince, MAB = Melissa A. Booker, RAW = Rachel A. Woodfield, RRA = Rebecca R. Atiles, RAS = Roland A. Sosa, SRR = Steven R. Rink, VAL = Vanessa A. Lee. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 19 Surveys were conducted over all seasons of the year during multiple years, both during drought and high rainfall years. In total, surveys were conducted over 45 survey dates. Based on the extensive amount of field investigation that has been conducted by numerous trained biologists, no additional field surveys are anticipated to be required to adequately characterize the resources of the project area. GENERAL BIOLOGICAL SURVEY Vegetation communities were surveyed on foot and delineated on an aerial map of the project area. Plant identifications were either resolved in the field or later determined through verification of voucher specimens. Wildlife species were determined through direct observation (aided by binoculars), identification of vocalizations, or through observation of sign. JURISDICTIONAL WETLAND DELINEATION A jurisdictional wetland delineation was performed using the routine on-site determination methods noted in the 1987 Army Corps of Engineers’ (ACOE) Wetland Delineation Manual (Environmental Laboratory 1987). In addition, the delineation effort was expanded to identify wetlands/non-wetland waters of the U.S. and streambeds under federal and state jurisdiction, respectively. Evidence supporting jurisdictional determinations was recorded on wetland field data forms and depicted in photographs of the data points. Wetland habitats and jurisdictional waterways were plotted on an aerial map (with topographical overlay) of the study area. Wetland Parameters The presence of 3 parameters was used to define an area as a wetland: 1) hydrophytic vegetation, 2) wetland hydrology, and 3) hydric soils. Hydrophytic Vegetation Hydrophytic vegetation is present when vegetation communities are dominated by a preponderance (>50%) of species classified as obligate wetland plants (OBL) (estimated probability of occurring in wetlands, >99%), facultative wetland plants (FACW) (estimated probability of occurring in wetlands, 67% to 99%), or facultative plants (FAC) (estimated probability of occurring in wetlands, 33% to 67%) based on the National List of Plant Species that Occur in Wetlands (U.S. Fish & Wildlife Service 1988). Wetland Hydrology Wetland hydrology is indicated by the presence of surficial or sub-surficial hydric characteristics, showing that “the presence of water has an overriding influence on characteristics of vegetation and soils due to anaerobic and reducing conditions, respectively.” Hydric Soils Hydric soils were examined by digging test pits and evaluating excavated soils using the chroma index from the Munsell Soil Color Charts (Munsell Color 2000). Hydric soil indicators are present when soils “have formed under conditions of saturation, flooding, or ponding long enough during the growing season to develop anaerobic conditions in the upper part.” Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 20 Jurisdiction of Wetlands and Waterways The extent of jurisdictional boundaries was determined according to the federal, ACOE and state, CDFG definitions of wetlands and non-wetland waters of the U.S./streambed. U.S. Army Corps of Engineers Under Section 404 of the Clean Water Act (CWA), the ACOE has regulatory authority over the discharge of dredged or fill materials into the waters of the U.S. (33 U.S.C. 1344). The term “waters of the U.S.” is defined in 33 CFR Part 328.3(a) as: (1) all navigable waters (including all waters subject to the ebb and flow of the tide); (2) all interstate waters and wetlands; (3) all other waters such as intrastate lakes, rivers, streams, (including intermittent streams), mudflats, wetlands, sloughs, prairie potholes, wet meadows, playa lakes, or natural ponds, the use, degradation or destruction of which could affect interstate or foreign commerce; (4) all impoundments of water mentioned above; (5) all tributaries to waters mentioned above; (6) the territorial seas; and, (7) all wetlands adjacent to waters mentioned above. The study area includes the Lake Calavera reservoir (reservoir), which was created on an existing drainage (i.e., Calavera Creek), and would be considered an impoundment of a waters of the U.S.. Wetlands are defined at 33 CFR 328.3(b) as “those areas that are inundated or saturated by surface or ground water at a frequency and duration sufficient to support ... a prevalence of vegetation typically adapted for life in saturated soil conditions.” Therefore, to be considered a jurisdictional wetland under the ACOE, the criterion of all 3 parameters (hydrophytic vegetation, wetland hydrology, and hydric soils) must be present. In the absence of wetlands and non-tidal waters, the limits of ACOE jurisdiction in drainages and streams extend to the ordinary high water mark (OHWM), which is defined in 33 CFR 328.3(e) as, “that line on the shore established by the fluctuation of water and indicated by physical characteristics such as clear, natural line impressed on the bank, shelving, changes in the character of soil, destruction of terrestrial vegetation, the presence of litter and debris, or other appropriate means that consider the characteristics of the surrounding areas.” The limits of jurisdiction for the reservoir would extend to the OHWM (i.e., spillway elevation) but would also extend to all adjacent wetlands. The term adjacent wetlands, as discussed in Part 328.3 (8c), means bordering, contiguous, or neighboring. These include waters of the U.S. separated by manmade dikes or barriers, natural river berms, beach dunes, and the like. California Department of Fish and Game The CDFG has regulatory authority over actions that would “divert, obstruct or change the natural flow or bed, channel or bank of any river, stream or lake designated by the Department,” pursuant to Section 1600 et seq. of the Fish and Game Code (Division 2, Chapter 6). The breadth of jurisdiction under the CDFG differs from the ACOE in that a “streambed” is not limited to the OHWM, but rather encompasses the entire width of the streambed, from bank to bank, regardless of the water level. In addition, jurisdictional wetlands under the CDFG only require one wetland parameter be present, but the wetlands must be associated, within or adjacent to, a streambed. Furthermore, CDFG jurisdiction extends over “adjacent riparian habitat,” including all Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 21 riparian habitat supported by a river, stream or lake, even if the riparian area does not necessarily meet the hydrophytic vegetation criteria as defined in the ACOE. THREAD-LEAVED BRODIAEA SURVEY M&A biologists surveyed for the federally listed, threatened thread-leaved brodiaea throughout the study area. In addition, M&A biologists surveyed the western portion of the Lake Calavera Trails study area as part of the Lake Calavera Improvement project (M&A 2004). The previous project consisted of the following: replacing the inoperable outlet tower; repairing the existing spillway structure; improving the access road; and providing improved site and facility security. In addition, the report analyzed potential impacts as a result of water level drawdown of Lake Calavera. The study area for the previous project consisted of the area between the eastern edge of Lake Calavera to the western boundary of the site. Only the limits of construction for the Lake Calavera Improvement project were surveyed, which consisted of the immediate area around Lake Calavera. FOCUSED WET SEASON SAMPLING FOR FEDERALLY LISTED, ENDANGERED VERNAL POOL BRANCHIOPODS M&A biologists, authorized under federal Endangered Species Act section 10(a)(1)(A) permit #797999, conducted wet season survey sampling for the federally listed, endangered vernal pool branchiopods according to the recommended guidelines noted in the USFWS Vernal Pool Branchiopods Survey Guidelines dated April 1996. Biologists walked the Lake Calavera Trails project site and mapped all ephemeral pools/swales locations. A list of flora and fauna observed and associated with the pools was taken. In addition, biologists recorded a list of the non-listed vernal pool crustacean and amphibian species observed during the sampling surveys. Color digital images were taken during the wet season sampling surveys; photographs were taken of representative on-site ephemeral pools/swales that were sampled for the listed vernal pool branchiopod species. Each photograph was labeled with the precise location of the project site, direction from which the photograph was taken, and date of photograph. Pool survey sampling dates and times varied according to weather and scheduling conditions, and individual biologists used professional judgment to comply with USFWS vernal pool survey guidelines as closely as possible. Biologists recorded field notes for each field survey on the data forms provided in the USFWS Vernal Pool Branchiopod Survey Protocol. Under most circumstances, surveys for fairy shrimp would be limited to vernal pools/swales characterized as low areas that supported shallow temporary inundation. However, due to the disturbed nature of the on-site pools/swales, a more inclusive survey approach was utilized to include areas characterized as either tire ruts, shallow swales, and basins formed from trail/road maintenance. Biologists sampled all ephemeral pools/swales, along the Lake Calavera Trails project site that became inundated (greater than 3 cm of standing water) after a rain event once every two weeks. The surveys continued until the ephemeral pools/swales were no longer inundated or experienced 120 days of continuous inundation. Surveys were re-initiated if the ephemeral pool/swale dried down and subsequently refilled within the same wet season. At each wet season visit, representative portions of the pool/swale bottom, edges and vertical water column were sampled using a 15 x 20 Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 22 centimeter dip net with a 1.0-millimeter net mesh size. The dip net was examined for vernal pool branchiopods and emptied of material every approximately 0.75 meters. FOCUSED LEAST BELL’S VIREO AND SOUTHWESTERN WILLOW FLYCATCHER SURVEYS M&A permitted biologists conducted 8 focused surveys for the least Bell’s vireo and 5 protocol surveys for the southwestern willow flycatcher, as authorized under our federal Endangered Species Act, Section 10(a)(1)(A) permit #797999-5 and our California Department of Fish and Game Memorandum of Understanding. These surveys were conducted in accordance with the current U.S. Fish and Wildlife Service’s Least Bell’s Vireo Survey Guidelines (USFWS 2001) and Southwestern Willow Flycatcher Protocol Revision 2000 (USFWS 2000). Only the eastern portion of the project site was surveyed during the 2005 breeding season. The eastern portion of the site consists of the area between the eastern edge of Lake Calavera to the eastern boundary of the site. The survey area included approximately 3.60 linear kilometer of potential suitable vireo and flycatcher habitat. M&A biologists previously surveyed the western portion of the Lake Calavera Trails study area (approximately 15 acres of potential vireo and flycatcher habitat) as part of the Lake Calavera Improvements project (M&A 2004). The western portion of the site consists of the area between the eastern edge of Lake Calavera to the western boundary of the site. FOCUSED COASTAL CALIFORNIA GNATCATCHER SURVEYS M&A permitted biologists conducted 4 focused surveys for the coastal California gnatcatcher to identify areas of presence (occupied habitat). These surveys were conducted in accordance with the U.S. Fish and Wildlife Service’s Coastal California Gnatcatcher Presence/Absence Survey Protocol (USFWS 1997), as authorized under M&A federal Endangered Species Act, Section 10(a)(1)(A) permit #797999-5 and CDFG Memorandum of Understanding. Biologists slowly walked survey routes in appropriate gnatcatcher habitat. Taped recordings of gnatcatcher vocalizations, as well as “pishing”, were used to elicit initial vocal responses, and an approximate 5 to 10 minute time interval was allowed for a response, particularly from advantageous viewpoints. Gnatcatcher presence was determined based on the detection of songs, calls, and/or direct observations. SCIENTIFIC NOMENCLATURE Scientific nomenclature used in this report is from the following references: vegetation communities, Holland (1986) and Oberbauer (1996); flora, Hickman (1993), Baldwin et al. (2004); fairy shrimp, Eriksen and Belk (1999); amphibians and reptiles, Crother et al. (2001 and 2003); butterflies, Opler and Wright (1999); and birds, American Ornithologists’ Union (1998 and 2004). SURVEY LIMITATIONS The aforementioned field surveys were conducted to assess the biological resources present within the study area. The aforementioned field surveys extended from January 2002 through July 2005 and no additional surveys are expected to be required for the proposed project. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 23 RESULTS PHYSICAL CHARACTERISTICS The Lake Calavera Trails study area is situated along a USGS unnamed tributary to Agua Hedionda Creek, which occurs approximately one mile southwest of the site. This drainage has been identified as Calavera Creek by others (CGvL 2001). The site contains/encompasses a man-made earth-fill dam and reservoir (called Lake Calavera) that currently impounds runoff from the upper Calavera Creek watershed. Construction of the dam, and creation of the reservoir/impoundment has effected/impacted site physiography. Slopes draining into the reservoir range from gentle on the northern and northeastern side to steep on the flanks of Mount Calavera to the south. The site ranges from approximately 180 to 415 feet above mean sea level elevation. Underlying geology is mapped as Tertiary intrusive rhyolite (flanks of Mount Calavera), Eocene marine, Mesozoic basic intrusive, Mesozoic tonalite and diorite, Pre-Silurian metavolcanic, and Upper Cretaceous marine (Rogers 1965). The soils mapped within the study area are comprised of Altamont clay, Huerhuero loam, Cieneba-Fallbrook rocky sandy loam, Friant rocky fine sandy loam, Loamy Alluvial lands of the Huerhuero complex, Las Flores loamy fine sand, Las Posas stony fine sandy loam, and Salinas clay loam (Bowman et al. 1973). BIOLOGICAL RESOURCES Botanical Resources-Flora A total of 18 vegetation types were identified within the study area (Table 3; Figure 4; Appendix 1). Per request from the City, Figure 5 has been provided to identify the areas on-site, which are comprised of 25 to 40 percent slopes as well as greater than 40 percent slopes. In addition, Appendix 2 consists of distant/internal photo points of the study area. Table 3.Summary of Vegetation Communities within the Study Area Vegetation Community HMP Habitat Group1 Holland/ Oberbauer Code Area (acre) Disturbed Wetland Group A 11200 0.21 Open Water Group A 13100 13.08 Cismontane Alkali Marsh Group A 52310 0.60 Coastal and Valley Freshwater Marsh Group A 52410 9.84 Southern Coast Live Oak Riparian Forest Group A 61310 3.96 Mule Fat Scrub Group A 63310 2.32 Southern Willow Scrub Group A 63320 22.44 Coast Live Oak Woodland Group A 71160 3.99 Disturbed Valley Needlegrass Grassland Group B 42110 7.43 Diegan Coastal Sage Scrub Group C 32500 71.29 Coastal Sage-Chaparral Scrub Group D 37G00 0.46 Southern Mixed Chaparral Group D 37120 53.84 Chamise Chaparral Group D 37200 13.96 Non-native Grassland Group E 42200 38.73 Disturbed Habitat Group F 11300 19.14 Non-native Vegetation Group F 11000 1.04 Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 24 Vegetation Community HMP Habitat Group1 Holland/ Oberbauer Code Area (acre) Urban/Developed Group F 12000 0.34 Total: 262.67 1 Group A habitats are associated with wetlands; Group C habitats are occupied by coastal California gnatcatcher. Disturbed Wetland Disturbed wetland has been mapped within the northeastern portion of the study area adjacent to southern willow scrub. This vegetation community is comprised of open and patchy flora species including non-native and native species. This area is heavily dominated by pampas grass (Cortaderia jubata) with several coyote brush (Baccharis pilularis) shrubs intermixed. Open Water This category includes the Lake Calavera reservoir and a small seasonal pond located along a drainage within the western portion of the study area. Water levels are expected to fluctuate seasonally and fringe areas mapped as open water likely become vegetated with freshwater marsh during the drier parts of the year. Cismontane Alkali Marsh Patches of cismontane alkali marsh are found along the reservoir margin and in other mesic locations upstream of the reservoir. High evaporation and low input of freshwater render these areas somewhat salty. The dominant species of this habitat is yerba mansa (Anemopsis californica) and saltgrass (Distichlis spicata). Other species present include western ragweed (Ambrosia psilostachya), Mexican rush (Juncus mexicanus), and spiny rush (Juncus acutus ssp. leopoldii). Non-native plants such as celery (Apium graveolens), annual beard grass (Polypogon monspeliensis), and curly dock (Rumex crispus) are also present. Coastal and Valley Freshwater Marsh Freshwater marsh habitat occurs along the margin of the reservoir in areas presently flooded by fresh water. In these areas prolonged saturation permits accumulation of deep, peaty soils. This habitat is dominated by a closed canopy of emergent monocots including broad-leaved cattail (Typha latifolia) and California bulrush (Scirpus californicus). Other herbaceous species including salt marsh fleabane (Pluchea odorata) and pale spike-sedge (Eleocharis macrostachya) occur along the upper edge of this vegetation type. M&A #04-101- Merkel & Associates, Inc Lake Calavera Trails Biological Resources Map Figure 4 N EW S %U %U %U %U %U %U %U %U %U %U %U %U%U %U %U %U %U %U %U %U %U %U %U%U %U %U %U %U%U %U %U %U %U %U %U %U %U %U %U %U %U %U %U %U%U %U %U %U %U %U %U %U %U %U %U %U %U %U %U #S #S #S #S #S #S #S #S #S #S #S #S #S #S #S #S #S#S #S #S #S #S #S #S #S #S #S #S #S #S ÊÚ ÊÚ ÊÚ ÊÚ ÊÚ ÊÚ $T $T $T $T $T $T $T $T $T $T $T$T $T $T $T $T $T $T $T $T $T$T $T #³ $T$T $T$T$T $T $T $T $T $T SkyHavenLn. Lake Blvd. T a m arack A ve. 5 1 1 1 30 15 1 1 10 10 3 15 16 6 50 20 9 1 100 130 28 2 25 2 8 1 1 4 2 9 1 1 15 175 7 25 8 1 1 1 1 1 1 25 1913 20 10 50 30 15 6 5 5 5 5 %U %U #S #S #S #S #S #S (# = species count) %U Vegetation Communities ÊÚ ÊÚ %U #S Brown-headed Cowbird (Molothrus ater) Other Species Sensitive Species (Juncus acutus) (Adolphia californica) Spiny Rush California Adolphia (Toxostoma redivivum) (Lanius ludovicianus) (Picoides nuttallii) California Thrasher Nuttall's Woodpecker Coastal California Gnatcatcher (Polioptila californica californica) Northern Harrier (Circus cyaneus) Cooper's Hawk (Accipiter cooperii) Western Dichondra (Dichondra occidentalis) (focus surveys - pair) Coastal California Gnatcatcher Coastal California Gnatcatcher (focus surveys - individual) (Isocoma menziesii var. decumbens) Clay-field Goldenbush Loggerhead Shrike Western Spadefoot (Spea hammondii) #S #S (Dendroica petechia brewsteri) Yellow Warbler White-tailed Kite (Elanus leucurus) #S Yellow-breasted Chat (Icteria virens) #S #S (Agelaius tricolor) Tricolored Blackbird 200 0 200 400 600 Feet Portable Restroom$T #³Wood Timber Stair View Point/Interperative Signage$T Picnic Table$T $T Access Point ConnectiontoCityWideTrails Information Kiosk$T $T Litter Receptacle / Dog Waste Station $T Access Points ConnectiontoOtherTrailSystems Access Points Connection to Street/Sidewalk $T Proposed Trail Amenities # SDG&E Easement Road # Carlsbad Municipal Water District Easement Road # City of Oceanside Trail Carlsbad Municipal Water District Easement Road # SDG&E Easement Road # CDFG Owned Trails # CDFG Owned Trails Other Study Area/City Owned Land SDG&E Right-of-Way Proposed Trails Type B (Hikers/Bicyclists 4-8 feet wide) Type C (Hikers only 2-6 feet wide) Type A (Hikers/Bicyclists 10-12 feet wide) Existing Water District/SDG&E Rd. Official Offsite Trail System Barrier Fencing Along Trail Boardwalk - 6 feet wide Oak Riparian Park Open Water Cismontane Alkali Marsh Coastal and Valley Freshwater Marsh Disturbed Wetland Southern Coast Live Oak Riparian Forest Mule Fat Scrub Southern Willow Scrub Diegan Coastal Sage Scrub Diegan Coastal Sage Scrub/Reveg Coyote Brush Scrub Coastal Sage-Chaparral Scrub Southern Mixed Chaparral Chamise Chaparral Disturbed Valley Needlegrass Grassland Non-native Grassland Coast Live Oak Woodland Disturbed Habitat Non-native Vegetation Urban/Developed 2008 Aerial Image from City of Carlsbad # Calavera Hills Trail l'w l'w t.>:;\-;/ .. • ... ♦ •♦• --D . . . ,___....;ii.,..-~~;__= -~---'-___ s Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 27 Southern Coast Live Oak Riparian Forest Individual trees, as well as small groves of coast live oak (Quercus agrifolia), occur along slopes abutting the reservoir, tributary drainages, and the mesic areas upstream from the reservoir. Most of the oaks are mature trees with a height and similar canopy width ranging from 20 to 40 feet. The understory includes mostly leaf-litter, which serves to keep the soil and roots of these trees cool and moist during the dry summer months. Along the canopy fringe, several shade-adapted species were detected. Included here were California peony (Paeonia californica), checker-bloom (Sidalcea malvaeflora ssp. sparsifolia) and coast jepsonia (Jepsonia parryi). Mule Fat Scrub Mule fat scrub occurs along much of the southern side of the reservoir and is typically situated between freshwater marsh and upland habitat types such as Diegan coastal sage scrub. It is typically characterized as a monotypic shrub community with mule fat (Baccharis salicifolia) as the predominant species. Occasional young willows may also be found in this habitat, though in most cases individual willows are mapped as southern willow scrub. Understory plants include wetland associates such as saltgrass and in shady areas cocklebur (Xanthium strumarium). Southern Willow Scrub Southern willow scrub habitat is predominantly located along Lake Calavera Creek, upstream from the reservoir. Much of this habitat includes willow species ranging from 20 to 40 feet in height. Included here are arroyo willow (Salix lasiolepis), lance-leaf willow (Salix lucida ssp. lasiandra) and the more robust Goodding's black willow (Salix gooddingii). Several small groves of California fan palm (Washingtonia filifera) have invaded the upstream portion of the site. In the most mesic locations, freshwater marsh habitat including dense stands of California bulrush and broad-leaved cattail comprise the understory. In drier areas, the understory includes a high diversity of shrub and herbaceous plant species. The shrub layer includes mule fat, narrow-leaved willow (Salix exigua), and western poison oak (Toxicodendron diversilobum). The herbaceous layer includes yerba mansa, San Diego sedge (Carex spissa), and variety of rushes including Mexican rush, mariposa rush (Juncus dubius), and the sensitive flora species spiny rush. Coast Live Oak Woodland Coast live oak woodland occurs throughout the site, predominantly on north facing slopes. The dominant flora species on-site include coast live oak and scrub oak. In addition, this habitat contains scrub oak hybrids (Quercus dumosa X Quercus berberidifolia). Disturbed Valley Needlegrass Grassland A relatively large area of native grassland occurs within the eastern portion of the study area. Currently purple needlegrass (Nassella pulchra) dominates these areas and the clay soils are conducive to a variety of spring blooming bulbs including sharp-tooth sanicle (Sanicula arguta), Pacific sanicle (Sanicula crassicaulis), and blue-eyed grass (Sisyrinchium bellum). According to the previous surveys performed by M&A (M&A 2002, revised 2003), much of the area mapped as native grassland located south of the reservoir had burned and as a result many of the less fire tolerant non- native species had been eradicated. However, due to the rain events San Diego County has Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 28 experienced this past winter, non-native species are increasing in abundance. Non-native species present include black mustard (Brassica nigra) and slender wild oat (Avena barbata). Diegan Coastal Sage Scrub Diegan coastal sage scrub is located predominately on the north facing slopes within the eastern portion of the study area. This vegetation community is comprised of mostly drought deciduous shrubs, which range from 2 to 4 feet in height. Species present include California sagebrush (Artemisia californica), interior flat-top buckwheat (Eriogonum fasciculatum var. foliolosum), California encelia (Encelia californica), black sage (Salvia mellifera), coast monkeyflower (Mimulus aurantiacus), and taller shrubs such as laurel sumac (Malosma laurina), toyon (Heteromeles arbutifolia), and lemonadeberry (Rhus integrifolia). These taller sage scrub plants often dominate the steep slopes abutting drainages. Also present within this vegetation community are native grasses such as blue-eyed grass and purple needlegrass, in shady areas ashy spike-moss (Selaginella cinerascens) can be found. California adolphia (Adolphia californica), a sensitive species has also been found throughout this vegetation community. It should be noted that a strip of Diegan coastal sage scrub located within the northwestern corner is part of a previous restoration project. An above-ground irrigation system fostered some areas of this habitat which includes California encelia, coastal sagebrush, coastal deerweed (Lotus scoparius var. scoparius) and, mesa bush mallow (Malacothamnus fasciculatus). In addition, several monotypic stands of coyote brush are located throughout the study area. These patches can be found within upland areas as well as moist areas adjacent to southern willow scrub vegetation communities. These areas are dominated by coyote brush with very little understory; however, in more mesic portions of the study area bristly ox-tongue (Picris echioides) and western poison oak can be found. Coastal Sage-Chaparral Scrub Coastal sage scrub and mixed chaparral habitats blend in several areas on-site. These areas include sage scrub plants such as California sagebrush and interior flat-top buckwheat mixed with chaparral associates such as chamise (Adenostoma fasciculatum) and mission manzanita (Xylococcus bicolor). Southern Mixed Chaparral This fire adapted vegetation community is located predominately on north facing slopes southeast of the reservoir. It is dominated by broad-leaved deep-rooted shrubs, which range from 3 to 9 feet in height with occasional patches of bare soil. Flora species include, chamise, mission manzanita, scrub oak (Quercus berberidifolia), spiny redberry (Rhamnus crocea), toyon, and coast prickly-pear (Opuntia littoralis). The understory consists of mostly leaf litter with flora species such as coastal deerweed, peak rush-rose (Helianthemum scoparium), hooked skunkweed (Navarretia hamata ssp. hamata), and in shady areas common miner's-lettuce (Claytonia perfoliata ssp.perfoliata) and ashy spike-moss. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 29 Chamise Chaparral Chamise chaparral is predominately located within the eastern portion of the site. Similar to southern mixed chaparral, this community is adapted to repeated fires by stump sprouting. The dominant flora species is chamise. Other species present include scrub oak, spiny redberry, and coastal deerweed. Non-native Grassland The areas mapped as non-native grassland meet the MHCP definition for annual (non-native) grasslands since they comprise a mixture of annual grasses and broad-leaved herbaceous species. Non-native grasses typically comprise at least 30 percent of the vegetation. Grasses common in these areas include ripgut grass (Bromus diandrus), red brome (Bromus madritensis ssp. rubens), and slender wild oat. Forbs include non-native species such as short-pod mustard (Hirschfeldia incana), black mustard, long-beak filaree (Erodium botrys), red-stem filaree (Erodium cicutarium), as well as native species with weedy tendencies such as fascicled tarplant (Deinandra fasciculata), and doveweed (Eremocarpus setigerus). Several areas mapped as non-native grassland contain a moderate number of native species such as blue-eyed grass, dot-seed plantain (Plantago erecta), and purple owl's-clover (Castilleja exserta ssp. exserta). An existing 100-foot firebreak is currently graded/disced yearly or as required by the City fire marshall. The firebreak was examined during a 2006 field meeting and was observed to be centered over the existing Carlsbad Municipal Water District road (Type A trail) located along the northern boundary of the study area. The length of the firebreak extends from approximately the western end of Sky Haven Lane eastward to the trail/street connections at Lake Boulevard. It is also within the vicinity of this location where off-road motorized and non-motorized vehicle use has greatly increased in terms of racing and jumping. As a result of the firebreak and increasing unmonitored recreational use, the non-native grassland within this area was observed to be highly disturbed and devoid of vegetation. However, for purposes of this report, it is expected that with time and monitored recreational use the affected areas would divert back to land comprised predominantly of non-native grassland. Disturbed Habitat Areas mapped as this category follow the Multiple Habitat Conservation Program’s (MHCP) definitions for disturbed habitat. Per this definition, vegetative cover comprises less than 10 percent of the surface area and there is evidence of soil surface disturbance and compaction (i.e., grading). Some areas may exceed 10 percent vegetative cover; however, there is soil disturbance and the presence of debris. Disturbed habitat is mapped for the earthen dam, dirt/gravel utility access roads, and numerous walking/bike trails that exist on the property. Disturbed habitat has also been mapped for the spillway channel. Native and non-native flora species are sporadically located throughout the spillway channel; however, the cover is less than 10 percent. In addition, a large amount of broken concrete is located throughout the channel. Non-native Vegetation Non-native vegetation includes those areas dominated by landscape plantings. Several slopes within the study area are vegetated with common exotic ground covers such as Japanese honeysuckle (Lonicera japonica) and acacia (Acacia sp.). Also included in this category are shrubs such as rock Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 30 rose (Cistus sp.), and exotic trees such as Brazilian pepper tree (Schinus teribinthifolius) and eucalyptus (Eucalyptus sp.). Urban/Developed Urban/Developed is mapped for the paved access road that enters the property from the northwest corner of the site as well as the spillway apron. Ephemeral Pools/Swales M&A has identified a total of 19 ephemeral pools/swales within the following Lake Calavera Trails vegetation types: disturbed valley needlegrass grassland, non-native grassland, and disturbed habitat. Although ephemeral pools/swales are not classified as a vegetation community, these areas are described separately from the vegetation communities in which they occur. A diversity of ephemeral pools/swales currently exists on the Lake Calavera Trails project site. The pools/swales surveyed varied in their nature and origin with the locations being tire ruts, shallow swales, and basins formed from trail/road maintenance activities (Table 4). The flora within and adjacent to pool/swale basins was disturbed and not typical of “intact” vernal pools. The flora observed was dominated by non- native species such as grass poly (Lythrum hyssopifolia), curly dock, and annual beard grass. No obligate vernal pool floral species were detected within any of the pool/swales in the project area. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 31 Table 4. Flora and Fauna Detected at Survey Points During Pool/Swale Surveys Survey Point Habitat Descriptor Species within wetted area/basin Species adjacent to wetted area/basin P1 Tire ruts Lythrum hyssopifolia * Rumex crispus * Juncus bufonius Ostracods Branchinecta lindahli Hirschfeldia incana * Erodium botrys * Lolium multiflorum * P2 Tire ruts Lythrum hyssopifolia * Rumex crispus * Juncus bufonius Ostracod Hirschfeldia incana * Erodium botrys * Lolium multiflorum * P3 Tire ruts Lythrum hyssopifolia * Rumex crispus * Juncus bufonius Ostracod Pseudacris regilla Hirschfeldia incana * Erodium botrys * Lolium multiflorum * P4 Road/trail pool Lythrum hyssopifolia * Juncus bufonius Psilocarphus tenellus Cotula coronopifolia * Polypogon monspeliensis * Ostracod Anisoptera Malosma laurina Quercus agrifolia Marah macrocarpus Sisyrinchium bellum P5 Road/trail pool Culex sp. Spea hammondii Pseudacris regilla Deinandra fasciculata Lolium multiflorum * Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 32 Survey Point Habitat Descriptor Species within wetted area/basin Species adjacent to wetted area/basin P6 Tire ruts Lythrum hyssopifolia * Rumex crispus * Juncus bufonius Ostracod Culex sp. Pseudacris regilla Hirschfeldia incana * Erodium botrys * P7 Road/trail pool Rumex crispus * Juncus bufonius * Hedypnois cretica * Rhus integrifolia Baccharis pilularis P8 Road/trail pool Lythrum hyssopifolia * Rumex crispus * Cladocera Ostracod Zygoptera Rhus integrifolia Baccharis pilularis P9 Road/trail pool Cladocera Branchinecta lindahli Leymus condensatus Baccharis salicifolia Baccharis pilularis Quercus berberidifolia Lathyrus splendens Rhus integrifolia P10 Road/trail pool Cladocera Heteromeles arbutifolia Baccharis pilularis Rhus integrifolia P11 Road/trail pool < none > Mimulus aurantiacus Leymus condensatus Heteromeles arbutifolia Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 33 Survey Point Habitat Descriptor Species within wetted area/basin Species adjacent to wetted area/basin P12 Road/trail pool < none > Artemisia californica Malacothamnus fasciculatus Malosma laurina Salvia mellifera P13 Road/trail pool Polypogon monspeliensis * < none > P14 Road/trail pool < none > Malacothamnus fasciculatus Hirschfeldia incana * Claytonia parviflora Sambucus mexicana Heteromeles arbutifolia P15 Road/trail pools < none > Malacothamnus fasciculatus Hirschfeldia incana * Malosma laurina P16 Road/trail pool < none > Malacothamnus fasciculatus Hirschfeldia incana * Isocoma menziesii Artemisia californica P17 (complex) Road/trail pools Ostracod Branchinecta lindahli Hirschfeldia incana * Artemisia californica P18 Road/trail pool Hirschfeldia incana * Hirschfeldia incana * Artemisia californica P19 Road/trail pool Polypogon monspeliensis * Ostracod Hirschfeldia incana * Artemisia californica *Introduced species. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 34 Jurisdictional Wetlands and Non-wetland Resources Seven jurisdictional wetland habitat types, as well as jurisdictional non-wetland waters of the U.S./streambed were identified within the study area (Table 5; Figure 6; Appendices 3 and 4). Table 5.Summary of Jurisdictional Wetlands and Non-wetland Waters/Streambed On-site Total Jurisdictional AcreageJurisdictional Wetlands and Non- Wetland Resources Total On-site Acreage ACOE/ CDFG CDFG Total Jurisdictional (acre) Disturbed Wetland 0.21 0.00 0.21 0.21 Non-Wetland Waters of the U.S./Streambed (Open Water) 13.08 13.08 0.00 13.08 Cismontane Alkali Marsh 0.60 0.58 0.02 0.60 Coastal and Valley Freshwater Marsh 9.84 9.83 0.01 9.84 Southern Coast Live Oak Riparian Forest 3.961 0.04 3.25 3.29 Mule Fat Scrub 2.321 1.32 0.93 2.25 Southern Willow Scrub 22.44 21.20 1.24 22.44 Coast Live Oak Woodland 3.99 0.00 0.00 0.002 Non-wetland Waters of the U.S./Streambed 0.89 0.49 0.40 0.89 Total Study Area:57.33 46.54 6.06 52.60 1 Not all the vegetation community was mapped jurisdictional; thus, the total on-site acreage amount and total jurisdictional amount are not the same. See the below sections for clarification. 2 The majority of coast live oak woodland is not jurisdictional; however, per the City’s HMP this vegetation community is typically associated with wetlands. See the below section for clarification. Disturbed Wetland A patch of non-native vegetation dominated by pampas grass is located adjacent to southern willow scrub within the northeastern portion of the study area. This vegetation community would not be considered wetlands per ACOE due to the dominance of pampas grass (FAC) and coyote brush (NI); however, CDFG would take jurisdiction of this area as Adjacent Riparian Habitat. Hydrology was determined through the presence of drift lines. In addition, soils test pits revealed low chroma with mottles. M&A biologists designated pampas grass as a FAC species rather than NI due to the likelihood of this species occurring within both wetlands and nonwetland areas. As observed within the Lake Calavera Trails study area, pampas grass is located within drainages as well as adjacent to moist areas. Cismontane Alkali Marsh Cismontane alkali marsh occurs within the northern portions of the study area. The dominant flora species are yerba mansa (OBL) and saltgrass (FACW). Other species present include western ragweed (FAC), Mexican rush (FACW), and spiny rush (FACW). Hydrology is indicated through saturation in the upper 12 inches, free water in test pits, drift lines, and water-stained leaves. Hydric soils are indicated by sandy clay soils with gleyed, a low-chroma matrix color, and redox concentrations. M&A #04-101- Merkel & Associates, Inc. Lake Calavera Trails Jurisdictional Wetlands and Waterways Map Figure 6 N EW S $T $T $T $T $T $T $T $T $T $T $T$T $T $T $T $T $T $T $T $T $T$T $T #³ $T$T $T$T$T $T $T $T $T $T ÊÚÊÚÊÚ ÊÚÊÚ ÊÚÊÚÊÚ ÊÚ ÊÚ ÊÚ ÊÚ ÊÚ ÊÚ ÊÚ ÊÚ ÊÚ ÊÚ ÊÚ ÊÚ ÊÚ ÊÚ ÊÚ ÊÚ ÊÚ ÊÚ ÊÚ ÊÚÊÚ ÊÚÊÚ ÊÚÊÚ ÊÚÊÚÊÚ ÊÚ ÊÚÊÚ ÊÚ ÊÚ ÊÚ ÊÚ ÊÚ ÊÚ ÊÚÊÚ ÊÚÊÚÊÚ dp/pp46 dp/pp47 dp/pp48 dp/pp49 dp/pp50 dp/pp45dp/pp44 dp/pp43 dp/pp28 dp/pp30 dp/pp31 dp/pp32 dp/pp33 dp/pp34 dp/pp35dp/pp36 dp/pp37 dp/pp38 dp/pp39 dp/pp40 dp/pp41 dp/pp42 dp/pp1 dp/pp2 dp/pp3 dp/pp4 dp/pp5 dp/pp6 dp/pp7 dp/pp8 dp/pp9 dp/pp10 dp/pp11 dp/pp12 dp/pp13 dp/pp14 dp/pp15 dp/pp16 dp/pp17 dp/pp18 dp/pp19 dp/pp20 dp/pp21 dp/pp22 dp/pp23 dp/pp24 dp/pp25 dp/pp26 dp/pp27 SkyHavenLn. Lake Blvd. T a m arack A ve. dp/pp29 Jurisdictional Habitats ACOE, CDFG CDFG Only ÊÚ Data Point/Photo Point Non-Wetland Waters of the U.S./Streambed Other 200 0 200 400 600 Feet SDG&E Right-of-Way Official Offsite Trail System Barrier Fencing Boardwalk Type C (Hikers only 2-6 feet wide) Portable Restroom$T $T Proposed Trails Type B (Hikers/Bicyclists 4-8 feet wide) View Point/Interpretive Signage Picnic Table$T $T Access Point Connection to City Wide Trails Information Kiosk$T $T Litter Receptacle / Dog Waste Station $T Access Point Connection to Other Trail Systems Access Point Connection to Street/Sidewalk $T Type A (Hikers/Bicyclists 10-12 feet wide) Existing Water District/SDG&E Rd. Proposed Trail Amenities # Calavera Hills Trail Oak Riparian Park # CDFG Owned Trails # City of Oceanside Trail # SDG&E Easement Road # SDG&E Easement Road # CDFG Owned Trails # Carlsbad Municipal Water District Easement Road # Carlsbad Municipal Water District Easement Road 2008 Aerial Image from City of Carlsbad #³Wood Timber Stair Study Area ,. / , ,_ /. I .· .,,,,-,-,,_ ,=._ 1/.--./ ;· -/ -,.. ---.. /--~_, -,, .. _· ,. ____ ..., •.• ~=-Lf-c_, / / ./ / Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 36 Coastal and Valley Freshwater Marsh Coastal and valley freshwater marsh vegetation occurs along most of the perimeter of the reservoir. Monotypic stands of California bulrush or broad-leaved cattail, both of which are OBL species, comprise these areas. Wetland hydrology indicators in these areas include saturated soil in the upper 12 inches and free water in test pits. Low-chroma matrix colors and redox depletion concentrations indicate hydric soils. Southern Coast Live Oak Riparian Forest Patches of southern coast live oak riparian forest can be found along slopes abutting the reservoir, tributary drainages, and the mesic areas upstream from the reservoir. This vegetation community would not be considered wetlands per ACOE due to the dominance of the upland species, coast live oak; however, CDFG would take jurisdiction of these areas as Adjacent Riparian Habitat. This jurisdiction has been applied in numerous other recent projects. It should be noted that all areas mapped as southern coast live oak riparian forest are not jurisdictional. Non-jurisdictional areas are located out of the drainage channel, do not meet any of the 3 wetland parameters, and their canopy overage would not be considered as adjacent riparian due to the distance from the drainage and lack of wetland hydrology indicators. Mule Fat Scrub Patches of mule fat scrub occur throughout the site. This wetland habitat is dominated by mule fat, a FACW species. Understory plants include wetland associates such as saltgrass and tall flatsedge, both FACW species. Hydrology is indicated through saturation in the upper 12 inches. Soil test pits revealed saturated clay soils with low-chroma colors and faint mottling in the upper 12 inches. It should be noted that all areas mapped as mule fat scrub are not jurisdictional. Non-jurisdictional areas do not meet the 3 wetland parameters. Southern Willow Scrub Southern willow scrub occurs predominantly east of the reservoir with lance-leaf willow, Goodding’s black willow (both OBL species), and arroyo willow (a FACW species) dominating this community. Understory plants include mule fat (FACW), blue elderberry (FAC), broad-leaved cattail (OBL), and Mexican rush (FACW). Hydrology was indicated through inundation, saturation in upper 12 inches, water marks, drift lines, and drainage patterns in wetlands. Soil test pits within these areas revealed mostly sandy clay soils with low-chroma colors, mottles, and a high concentration of decomposed organic matter. In addition, hydric soils were assumed at several data points based on the presence of all OBL and FACW dominant species, and since there was no indication that hydrology had been significantly altered. It should be noted that a small patch of disturbed southern willow scrub was detected at Data Point 39. It was determined that hydric vegetation was present; however, due to rain events the vegetation was altered and invasive upland species have expanded their range. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 37 Coast Live Oak Woodland The on-site coast live oak woodland vegetation community does not meet any of the jurisdictional wetland parameters; therefore this community is not jurisdictional within the Lake Calavera Trails study area. However, per the City’s HMP this vegetation community is associated with wetlands; thus was placed within the previous Table 4. Non-Wetland Waters of the U.S. Open Water The jurisdictional non-wetland waters of the U.S./streambed on-site include open water (Lake Calavera) as well as one on small pond within the northwestern portion of the site. Drainages The jurisdictional non-wetland waters of the U.S./streambed delineated throughout the site include mostly narrow drainage channels that are tributaries to Lake Calavera. These drainages are dominated by upland species and typically do not possess hydric soils. Hydrology is indicated by drainage patterns (i.e., soil disturbance indicating evidence of flow) and inundation. Wetland hydrology was determined at Data point 48 through inundation, saturation in upper 12 inches, sediment deposits, and drainage patterns in wetlands. It should be noted that the spillway apron (urban/developed) has been identified as jurisdictional since water is able to flow over it when the dam over flows. In addition the spillway channel (disturbed habitat) has been identified as a jurisdictional non-wetland waters of the U.S./streambed. Wetlands Functions and Values The well-developed jurisdictional wetlands and waterways on-site represent relatively high quality habitats. The riparian vegetation, marshes, and open water habitats contribute to the site’s high biological functions and values. The riparian vegetation, particularly the southern willow scrub, consists of moderately dense vegetation that provides a multi-layer canopy, which supports many common riparian birds, such as yellow-rumped warbler (Dendroica coronata), song sparrow (Melospiza melodia), lesser goldfinch (Carduelis psaltria), common yellowthroat (Geothlypis trichas), and may also provide potential suitable habitat for listed endangered bird species such as the least Bell’s vireo (Vireo bellii pusillus) and southwestern willow flycatcher (Empidonax traillii extimus). The on-site wetlands do support several sensitive riparian birds such as the yellow warbler (Dendroica petechia brewsteri), yellow-breasted chat (Icteria virens), and various raptors. Additionally, the smaller ponding areas and abundance of leaf litter beneath the larger stands of willows are expected to provide breeding habitat for various common amphibian species including the Pacific chorus frog (Pseudacris regilla) and western toad (Bufo boreas). The marsh and open water habitats also contribute to the site’s high wildlife diversity and abundance by supporting numerous wildlife species. The on-site wetlands and waterways have relatively high physical and chemical functions and values. The dam and associated reservoir provides for functions such as groundwater recharge, sediment retention, toxicant retention, and nutrient transformation by slowing water velocities to Agua Hedionda Creek. A high sediment/toxicant retention area is one that physically (or chemically) trap and retain on a net annual basis the inorganic sediments and/or chemical substances transported Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 38 through the watershed, which are generally toxic to aquatic life. Toxicants (i.e., grease, oil) are trapped in sediments (i.e., fine particulates), which settle out in the reservoir. High nutrient transformation areas are those that retain or transform inorganic P and/or N into their organic forms or transform (remove) N into its gaseous form, on either a net annual basis or during the growing season. Low water velocity and the presence of significant live woody or herbaceous vegetation contribute to high nutrient transformation on-site. The herbaceous and woody vegetation leading to and surrounding the reservoir also contribute to slowing water velocities as well as provide for shoreline stabilization. Zoological Resources-Fauna Appendix 5 contains a complete list of all fauna species observed or detected within the study area. Invertebrates Only the versatile fairy shrimp (Branchinecta lindahli) was collected on the project site during the focused wet season sampling for the federally listed, endangered vernal pool branchiopods. Butterflies Butterflies observed during the surveys include relatively common species such as cabbage white (Pieris rapae), western pigmy-blue (Brephidium exile), Behr's metalmark (Apodemia virgulti), mourning cloak (Nymphalis antiopa), Lorquin's admiral (Basilarchia lorquini), and California sister (Adelpha bredowii). One monarch (Danaus plexippus) was also observed within non-native grassland. Monarchs typically migrate through southern California from March through April; therefore, it is presumed that this individual is a migrant. Fish Western mosquitofish (Gambusia affinis) were the only species of fish detected on-site. They were observed in large numbers within the eastern portion of the study area along the south side of Lake Calavera Creek. The following species of fish are known to exist in the reservoir (CDFG Biologist, D. Mayer, pers, comm.): largemouth bass (Micropterus salmoides), white crappie (Pomoxis annularis), bluegill (Lepomis macrochirus), and at least one species of catfish, probably Bullhead (Amelurus sp.). Amphibians The Pacific treefrog was detected on-site. The western spadefoot (Spea hammondii) is also known to occur on-site due to the observation of desiccated larvae in ephemeral pool #6 (P6) during the course of our fairy shrimp surveys. Other species potentially present include the garden slender salamander (Batrachoseps major) and western toad, both of which are native amphibians. Due to the wet winter weather San Diego County has recently experienced, these species are more than likely active on the surface. The American bullfrog (Rana catesbeiana), an exotic species found throughout California, is also expected. This large frog is known to have a negative impact on many species of native vertebrates that are associated with wetland habitats. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 39 Reptiles The direct and indirect effects of human encroachment (i.e., off-road vehicle use, mountain biking, hiking, and adjacent urbanization to the north of the site) has likely had a negative impact on most reptile species occurring within the study area. Although the western fence lizard (Sceloporus occidentalis) and California kingsnake (Lampropeltis getula californiae) were the only observed species, additional species are undoubtedly present. The kingsnake was observed under a board within chamise chaparral. Relatively common lizards expected to occur on-site include the side- blotched lizard (Uta stansburiana) and southern alligator lizard (Elgaria multicarinata). Snake species expected to occur on-site include common kingsnake (Lampropeltis getula), southern pacific rattlesnake (Crotalus viridis helleri), striped racer (Masticophis lateralis), and gophersnake (Pituophis catenifer). Each of these species has been reported from within five miles of the study area in habitats similar to those found on-site. Other snakes with moderate potential to occur on-site include western threadsnake (Leptotyphlops humilis) and coachwhip (Masticophis flagellum). Birds The Lake Calavera Trails study area provides an abundance of habitat for many species of birds. Open water on the reservoir provides habitat for species such as pied-billed grebe (Podilymbus podiceps), mallard (Anas platyrhynchos), double-crested cormorant (Phalacrocorax auritus), ruddy duck (Oxyura jamaicensis), and northern shoveler (Anas clypeata). Representing the rail family (Rallidae) were common moorhen (Gallinula chloropus) and American coot (Fulica americana). Freshwater marsh along the reservoir’s fringe provides cover and nesting habitat for a variety of waterfowl species present such as mallard, gadwall (Anas strepera), ruddy duck, common moorhen, and American coot. Riparian habitats such as southern willow scrub provide habitat for many common species such as bushtit (Psaltriparus minimus), house wren (Troglodytes aedon), ruby-crowned kinglet (Regulus calendula), yellow-rumped warbler, and spotted towhee (Pipilo maculates). Other riparian birds present include belted kingfisher (Ceryle alcyon), downy woodpecker (Picoides pubescens), northern flicker (Colaptes auratus), olive-sided flycatcher (Contopus cooperi), Pacific-slope flycatcher (Empidonax difficilis), ash-throated flycatcher (Myiarchus cinerascens), and black-headed grosbeak (Pheucticus melanocephalus). Common species encountered within upland vegetation communities included Anna’s hummingbird (Calypte anna), western scrub-jay (Aphelocoma californica), Bewick's wren (Thryomanes bewickii), California towhee (Pipilo crissalis), and white-crowned sparrow (Zonotrichia leucophrys). In addition, a greater roadrunner (Geococcyx californianus) was observed on-site. Many species of raptors were detected throughout the study area. Bird species not observed on-site but recorded during previous M&A investigations (M&A 2002, Revised 2003) included common merganser (Mergus merganser), Virginia rail (Rallus limicola), sora (Porzana carolina), horned lark (Eremophila alpestris), Lincoln's sparrow (Melospiza lincolnii), cedar waxwing (Bombycilla cedrorum), tree swallows (Tachycineta bicolor), white-throated swift (Aeronautes saxatalis), and house sparrow (Passer domesticus). Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 40 Mammals Relatively few mammalian species were observed on-site. This is in part due to the fact that most native mammal species are primarily nocturnal and not easily observed during daytime surveys. The California ground squirrel (Spermophilus beecheyi) and desert cottontail (Sylvilagus audubonii) were both common on-site within coastal sage scrub and southern mixed chaparral communities. In addition, mammalian species were detected on-site due to the presence of tracts, they include the striped skunk (Mephitis mephitis), northern raccoon (Procyon lotor), and coyote (Canis latrans). Residents of the area walk their dogs on-site, and sign as well observations of domestic dog (Canis familiaris) was common. Other species identified on-site include Botta's pocket gopher (Thomomys bottae), western harvest mouse (Reithrodontomys megalotis), and woodrat (Neotoma sp.). Located throughout the site are nests created from sticks. These nests are presumed to be inhabited by the dusky-footed woodrat (Neotoma fuscipes); however, a variety of species could use these nests. Previous M&A investigations detected the western spotted skunk (Spilogale gracilis) on-site (M&A 2002, Revised 2003). Other rodent species expected on-site include the agile kangaroo rat (Dipodomys agilis), deer mouse (Peromyscus maniculatus), and cactus mouse (Peromyscus eremicus). These species form an important prey base for mammalian carnivores, raptorial birds, and snakes. Lake Calavera and the surrounding area provide abundant habitat for insects, arthropods, and lepidopterans. This in turn provides a major food resource for bats (Order Chiroptera). Roosting resources for potentially resident and migratory species are offered by adjoining riparian woodland and rock formations on Mount Calavera. The reservoir itself concentrates prey for species that forage over or near aquatic features. Since crepuscular and nocturnal obligates such as bats are largely undetectable by methods used in this investigation, the following species may potentially occur on-site based on records within similar habitat: California myotis (Myotis californicus), western pipistrelle (Pipistrellus hesperus), big brown bat (Eptesicus fuscus), hoary bat (Lasiurus cinereus), and Brazilian free-tailed bat (Tadarida brasiliensis). SENSITIVE BIOLOGICAL RESOURCES Environmentally Sensitive Lands Sensitive biological resources may be uniquely defined by local jurisdictions. However, the City does not individually define sensitive resources; therefore, sensitive resources have been defined in accordance with recognized standards, state and federal regulations, and the standards of the MHCP. CEQA Guidelines §15206 (b)(5) (Title 14, Chapter 3, Article 13) defines “sensitive wildlife habitats” as “including but not limited to riparian lands, wetlands, bays, estuaries, and marshes and habitats for endangered, rare and threatened species as defined by §15380 (Chapter 3).”For the purposes of this report, resources that meet one or more of the following criteria would be considered sensitive resources: a) lands supporting species or subspecies listed as rare, endangered, or threatened under Section 670.2 or 670.5, Title 14, California Code of Regulations, or the Federal Endangered Species Act, Title 50, Code of Federal Regulations, Section 17.11 or 17.12, or candidate species under the California Code of Regulations; b) riparian lands, wetlands, bays, estuaries, and marshes; Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 41 c) unique vegetation communities (associations of plant species that are rare or substantially depleted, unusual, or limited in distribution); d) wildlife corridors; e) species listed by the USFWS as threatened, endangered, or “Federal Species of Concern” (USFWS 2005a, USFWS 2005b, and USFWS 1999); f) species listed (or that meet the standard for listing) by the CDFG as threatened, endangered, rare, “Special Animals”, or “Special Plants” (CDFG 2005 and CDFG 2004); and g) MHCP narrow endemic and covered species. HMP Core and Linkage Areas/Wildlife Corridors Wildlife corridors are important in preserving species diversity. In the absence of corridors, habitats become isolated islands surrounded by development. Fragmented habitats support lower numbers of species and increase the likelihood of extinction for species restricted to small areas. Connections between areas of open space are integral to maintaining biological diversity and population viability. The City defines a corridor in the HMP as “A defined tract of land, usually linear, through which a species must travel to reach habitat suitable for reproduction and other life-sustaining needs.” According to the HMP, the Lake Calavera Trails study area is located within the Local Facilities Management Zone (LFMZ) 14 (City Adopted 2004). This zone includes Core 3 (approximately 1,163 acres), which contains large areas of coastal sage scrub that support critical populations of the threatened coastal California gnatcatcher and thread-leaved brodiaea. Other sensitive habitats within Core 3 include chaparral, grasslands, and wetland communities. Core 3 has direct linkages to other Core areas including Core 2, Core 4, and Core 5. Downstream of the reservoir, Linkage Area B connects Core 3 to Core 4 (i.e., Agua Hedionda Lagoon and environs). Located within Core 2 is Buena Vista Creek, and although recent survey information is lacking for this area, the extent and quality if the riparian vegetation suggests that this may represent a major population area for the least Bell’s vireo (City Adopted 2004). As described above, the Lake Calavera Trails study area retains some connectivity between Agua Hedionda Lagoon and Robertson Ranch. El Camino Real, a heavily trafficked highway, separates the back lagoon riparian habitat from Robertson Ranch. In addition, the expansion of College Boulevard has slightly interrupted this corridor. Moreover, habitat north of the El Camino Real now consists of a palm nursery and the agricultural lands of Robertson Ranch. This connection northward is therefore tenuous at present, but does not preclude future enhancement, insofar as urban hardscape (other than the road) is not in place. The Lake Calavera Trails study area functions as a wildlife corridor supporting movement of individuals (and thus genetic material) from within Core 3 to adjacent Core areas westward and vice versa (previous Figure 2a). Wetlands Wetland habitat types have extremely high wildlife values, are naturally limited in distribution, and also have been substantially depleted within southern California. Numerous species, including several sensitive species, are dependent on these habitats for food, cover, and breeding, and several additional species, although not dependent on these habitats, utilize these areas on a regular basis. The on-site wetlands are considered sensitive due to their high quality habitat, which support many common and sensitive riparian wildlife. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 42 Ephemeral Pools/Swales The on-site ephemeral pool habitat is considered “artificial” and not typical of a natural evolved vernal pool community, such as mima-mound vernal pool/community. On-site numerous shallow depressions have been formed which are capable of supporting standing water for various durations of time. All of the depressions appear to have been formed by vehicle tire ruts or by erosion patterns and soil compaction along trail ways. Despite the disturbed nature, 3 invertebrate groups and 2 vertebrate species were also observed at various times through the survey period. Invertebrate groups included water fleas (order: Cladocera) and seed shrimp (order: Ostracoda), both common constituents of local pools. Also observed were mosquito larvae. Both vertebrate species observed within several of the on-site pools were larval stages of the Pacific chorus frog and western spadefoot. Disturbed Valley Needlegrass Grassland Native grassland is also considered regionally sensitive given its historic loss due to urban development and agriculture. This habitat is especially important given its relatively large size and connectivity with other native habitats found on and off-site. Diegan Coastal Sage Scrub Coastal sage scrub has been substantially reduced in southern California largely due to urban and agricultural development, and several sensitive wildlife species are dependent on this habitat. Sage scrub vegetation communities provide habitat for the federally listed, threatened coastal California gnatcatcher, as well as several other state and locally sensitive species. The site’s coastal sage scrub is especially important given its relatively large size and connectivity with native habitats found on and off-site. The on-site Diegan coastal sage scrub supports at least 10 coastal California gnatcatchers as well as other sensitive species such as the loggerhead shrike (Lanius ludovicianus) and California thrasher (Toxostoma redivivum). Per the HMP, the Lake Calavera Trails site is one of the three locations in Carlsbad that supports the largest remaining tracts of Diegan coastal sage scrub (City Adopted 2004). Coastal Sage-Chaparral Scrub Similar to Diegan coastal sage scrub, coastal sage scrub-chaparral scrub vegetation communities are subject to large losses of habitat due to urban and agricultural development in southern California. This vegetation community is a transitional community between coastal sage scrub and chaparral types. It has the potential to provide foraging grounds for sensitive species including raptors. Southern Mixed Chaparral and Chamise Chaparral Although not classified as sensitive habitats per the HMP, southern mixed chaparral and chamise chaparral do have the potential to support foraging grounds for sensitive species including raptors. While on-site, the federally threatened coastal California gnatcatcher was observed within chamise chaparral. In addition, raptor species such as Cooper's hawk (Accipiter cooperii), red-shouldered hawk (Buteo lineatus), and red-tailed hawk (Buteo jamaicensis) were observed flying over the site. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 43 Non-native Grassland Although not classified as a sensitive habitat per the HMP, the on-site non-native grassland consists of a relatively large area and has the potential to provide a significant resource for raptor foraging for species such as the northern harrier (Circus cyaneus). Therefore, non-native grassland is considered sensitive within the Lake Calavera Trails study area. Rare, Threatened, Endemic, and/or Sensitive Species or HMP Covered Species Sensitive Flora Sensitive plants include those listed by USFWS (2005a, 2005b, 1999), CDFG (2005 and 2004), the California Native Plant Society (CNPS) (2001), and HMP covered species (City Adopted 2004). The CNDDB (CDFG 2003) identifies only California adolphia within the Lake Calavera Trails study area. However, a total of 4 sensitive plant species, clay-field goldenbush (Isocoma menziesii var. decumbens), western dichondra (Dichondra occidentalis), California adolphia, and spiny rush were identified within the study area (Figure 4). Clay-field goldenbush was found predominantly within the eastern portion of the study area. In certain conditions this species is difficult to identify due to the similar appearance to goldenbush (Isocoma menziesii var. menziesii). It should be noted that per the Checklist of Vascular Plants of San Diego County (Rebman et al. 2006), decumbent goldenbush is no longer a recognized species; rather it has been combined with spreading goldenbush (Isocoma menziesii var. menziesii), a non-special status flora species. As a result, this species is no longer considered sensitive. Two large areas of western dichondra were observed on the south side of the reservoir within relatively open areas of Diegan coastal sage scrub. M&A biologists were unable to quantify how many plants were located within the area due to growth behavior of this species. California adolphia was identified throughout the study area; however, exact counts of this species are difficult to obtain due to the species’ ability to reseed prolifically when established. Spiny rush was also identified within the study area, predominantly within the wetland vegetation communities. The locations are shown in previous Figure 4 and discussed in Table 6. M&A biologists did not locate any thread-leaved brodiaea plants within the Lake Calavera Trails study area during the 2005 surveys. In addition, M&A biologists determined that no potential habitat for thread-leaved brodiaea occurs within the identified limits of construction for the Lake Calavera Improvements project (M&A 2004). Table 7 lists the sensitive flora species known from the region, but not observed on-site. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 44 Table 6.Sensitive Flora Species Identified On-site Scientific Name Common Name Habitat Total Observed Federal Status State Status CNPS HMP Status Isocoma menziesii var. decumbens clay-field goldenbush Identified within non-native grassland along the southeastern portion of the study area. This species is similar to Isocoma menziesii and may have not been mapped. Typically located within chaparral and coastal scrub (sand, often in disturbed areas). It should be noted that per the Checklist of Vascular Plants of San Diego County (Rebman et al. 2006), decumbent goldenbush is no longer a recognized species; rather is has been combined with spreading goldenbush (Isocoma menziesii var. menziesii), a non-special status flora species. As a result, this species is no longer considered sensitive. ~203 None SP List 1B None Dichondra occidentalis western dichondra A large patch observed just southeast of the reservoir within a relatively open area under Diegan coastal sage scrub. Small, cryptic perennial herb typically found within southern mixed chaparral, chamise chaparral, Diegan coastal sage scrub, rocky outcrops in grasslands, and especially recently exposed areas of post-burn habitat. It often grows almost completely hidden at the base of leafy shrubs. Unable to determine quantity due to growth behavior None SP List 4 None Adolphia californica California adolphia This short spiny shrub was located throughout the entire site intermixed with Diegan coastal sage scrub, but occasionally occurred in peripheral chaparral habitats, particularly hillsides near creeks. ~491 None SP List 2 None Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 45 Scientific Name Common Name Habitat Total Observed Federal Status State Status CNPS HMP Status Juncus acutus ssp. leopoldii spiny rush Spiny rush populations were found within riparian habitats throughout the study area. ~250 None SP List 4 None Note: Codes listed on page 49. Table 7.Sensitive Flora Species Not Found On-site but Potentially Present Scientific Name Common Name Suitable Habitat Probability of Occurrence Federal Status State Status CNPS HMP Status Acanthomintha ilicifolia San Diego thorn mint Chaparral, coastal scrub, valley and foothill grassland, and vernal pools/clay. Low to moderate. Typical cracked and friable clay soils associated with this species are poorly developed on-site. Known to occur with the City. FT SE List 1B Covered Ambrosia pumila San Diego ambrosia Chaparral, coastal scrub, valley and foothill grassland, and vernal pools/often in distributed areas. Moderate. Well-developed chaparral and sage scrub communities. According to the HMP no populations of this species have been identified in the City (Adopted 2004) FE SP List 1B Covered Arctostaphylos glandulosa ssp. crassifoliai Del Mar manzanita Chaparral (maritime, sandy). Low. The Lake Calavera Trails study area is northeast of the known range. FE SP List 1B Covered Baccharis vanessae Encinitas baccharis Chaparral (maritime, sandstone). Low to none. Well outside historical range. FT SE List 1B Covered Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 46 Scientific Name Common Name Suitable Habitat Probability of Occurrence Federal Status State Status CNPS HMP Status Brodiaea filifolia thread-leaved brodiaea Chaparral (openings), cismontane woodlands, coastal scrub, playas, valley and foothill grassland, and vernal pools/ often clay. M&A biologists did not locate this species on-site during the 2005 surveys. Population known from approximately 1,500 feet south of the eastern end of study area. FT SE List 1B Covered Brodiaea orcuttii Orcutt’s brodiaea Closed-cone coniferous forest, chaparral, cismontane woodland, meadows and seeps, valley and foothill grassland, vernal pools/mesic, clay, sometimes serpentinite. Low. Similar habitat requirements of Brodiaea filifolia; M&A biologists did not locate this species on-site. None SP List 1B Covered Ceanothus verrucosus wart-stemmed ceanothus Chapparal. Moderate. Suitable on-site habitat; however, site is northeast of all known populations. None SP List 2 Covered Chorizanthe orcuttiana Orcutt’s spineflower Chaparral (maritime), closed- cone coniferous forest, and coastal scrub/sandy openings. Not expected, north of known range. FE SE List 1B Covered Comarostaphylis diversifolia summer holly Chaparral. Moderate. Suitable habitat limited on-site. None SP List 1B Covered Convolvulus simulans small-flowered morning glory Chaparral (openings), coastal scrub, valley and foothill grassland/clay, serpentinite seeps. Moderate. Friable clay soils poorly developed on- site. None SP List 4 None Corethrogyne filaginifolia var. linifolia Del Mar Mesa sand aster Coastal bluff scrub, chaparral (maritime, openings), coastal scrub / sandy Moderate. Suitable habitat on-site however, study area is northeast of known range. None SP List 1B Covered Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 47 Scientific Name Common Name Suitable Habitat Probability of Occurrence Federal Status State Status CNPS HMP Status Dudleya blochmaniae ssp. blochmaniae Blochman’s dudleya Coastal bluff scrub, chaparral, coastal scrub, valley and foothill grassland,/ rocky, often clay or serpentinite. Perennial herb, blooms April- June. Not expected, generally found closer to beaches. None SP List 1B Covered Dudleya viscida sticky dudleya Coastal bluff scrub, chaparral, coastal scrub/rocky. Perennial herb, blooms March-June. Not expected, typically found on dry, rocky slopes or cliffs, associated with coastal sage scrub or chaparral. None SP List 1B Covered Eryngium aristulatum var. parishii San Diego button celery Coastal scrub, valley and foothill grassland, vernal pools/mesic. Annual/perennial herbs, blooms April-June Moderate to low. Potential habitat exists on-site due to the identification of shallow depressions throughout the site. FE SE List 1B Covered Euphorbia misera cliff spurge Coastal bluff scrub, coastal scrub/rocky. Shrub, blooms December-August. Low to none. Conspicuous species not observed. None SP List 2 Covered Ferocactus viridescens San Diego barrel cactus Chaparral, coastal scrub, valley and foothill grassland, vernal pools. Shrub (stem succulent), blooms May-June Low. Species searched for during previous M&A investigations and were not found. None SP List 2 Covered Hazardia orcuttii Orcutt’s hazardia Chaparral, coastal scrub/often clay. Shrub (evergreen), blooms August-October. Not expected. Well north of sole U.S. population. FC ST List 1B Covered Holocarpha virgata ssp. elongata graceful tarplant Cismontane woodland, coastal scrub, valley and foothill grassland. Annual herb, blooms July-November. Moderate. Species searched for during previous M&A investigations; however, not found. None SP List 4 None Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 48 Scientific Name Common Name Suitable Habitat Probability of Occurrence Federal Status State Status CNPS HMP Status Iva hayesiana San Diego marsh elder Marshes and swamps, playas. Perennial herb, blooms April- September. Low. Near northern edge of known range. None SP List 2 Covered Muilla clevelandii San Diego goldenstar Chaparral, coastal scrub, valley and foothill grassland, vernal pools/clay. Perennial herb (bulbiferous), blooms May. Low. Near extreme northern end of known range; however, per the HMP, this species currently occurs within Carlsbad (Adopted 2004). None SP List 1B Covered Myosurus minimus var. apus little mouse-tail Valley and foothill grassland, vernal pools (alkaline). Annual herb, blooms March- June. Moderate to low. Potential habitat exists on-site due to the identification of shallow depressions throughout the site. None SP List 3 Covered Navarretia fossalis prostrate navarretia Chenopod scrub, marshes and swamps (assorted shallow freshwater), playas, vernal pools. Annual herb, blooms April-June. Moderate to low. Potential habitat exists on-site due to the identification of shallow depressions throughout the site. FT SP List 1B Covered Orcuttia californica California Orcutt grass Vernal pools. Annual herb, blooms April-August. Moderate to low. Potential habitat exists on-site due to the identification of shallow depressions throughout the site. FE SE List 1B Covered Quercus dumosa Nuttall's scrub oak Closed-cone coniferous forest, chaparral, coastal scrub/sandy, clay loam. Shrub (evergreen), blooms February-April. Moderate, near interface of Q. dumosa and Q. berberidifolia populations. None SP List 1B Covered Quercus engelmannii Engelmann oak Chaparral, cismontane woodland, riparian woodland, valley and foothill grassland. Tree (deciduous), blooms April-May. Low to none, near interface of Q. dumosa and Q. berberidifolia populations. None SP List 4 Covered Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 49 Scientific Name Common Name Suitable Habitat Probability of Occurrence Federal Status State Status CNPS HMP Status Viguiera laciniata San Diego County viguiera Chaparral, coastal scrub. Shrub, blooms February-June. Low. The site is generally outside of natural range of species, but now spreading in region via introduced hydroseed mixes. None SP List 4 None Federal: FE = Federally-listed as Endangered; FT = Federally-listed as Threatened; FPE = Federally proposed for listing as Endangered; FPT = Federally proposed for listing as Threatened; FPD = Federally proposed for delisting; FC = Federal candidate species (former Category 1 candidates); SC = Species of concern (list established by the National Marine Fisheries Service [NMFS] effective April 15, 2004); Delisted species are monitored for 5 years. State: California Endangered Species Act (CESA) Listing Codes: SE = State-listed as Endangered; ST = State-listed as Threatened; SCE = State candidate for listing as Endangered; SCT = State candidate for listing as Threatened; SCD = State candidate for de-listing; SR = California Rare Species. California Department of Fish and Game (DFG) Sensitivity Codes: CSC = Species of Special Concern;; FP = California fully protected species; SR = State-listed rare California Native Plant Society (CNPS) Sensitivity Codes: List of Species Designation: 1A = Plants presumed extinct in California; 1B = Plants rare, threatened, or endangered in California and elsewhere; 2 = Plants rare, threatened, or endangered in California, but more common elsewhere; 3 = Plants about which more information is needed (a review list); 4 = Plants of limited distribution (a watch list). California Natural Diversity Database (CNDDB) Sensitivity Codes: Special Plants (SP)/SPs (SA) = A general term that refers to all of the taxa the CNDDB is interested in tracking, regardless of their legal or protection status; these taxa fall into one of the above categories and/or one or more of the following categories: 1) Taxa which meet the criteria for listing, even if not currently included on any list, as described in Section 15380 of the CEQA Guidelines; 2) A Bureau of Land Management (BLM), U.S. Fish and Wildlife Service (USFWS), or U.S. Forest Service (USFS) Sensitive Species; 3) Taxa that are biologically rare, very restricted in distribution, declining throughout their range, or have a critical, vulnerable stage in their life cycle that warrants monitoring, but not currently threatened with extirpation; 4) Populations in California that may be on the periphery of a taxon’s range, but are threatened with extirpation in California; 5) Taxa closely associated with a habitat that is declining in California at an alarming rate (e.g., wetlands, riparian, old growth forests, desert aquatic systems, native grasslands, valley shrubland habitats, vernal pools, etc.); and 6) Taxa designated as a special status, sensitive, or declining species by other state or federal agencies, or non-governmental organization (NGO) (e.g., The World Conservation Union [IUCN], American Fisheries Society [AFS], Audubon Watch List; California Department of Forestry and Fire Protection [CDF], U.S. Department of Agriculture [USDA] Forest Service [FS], Fish and Wildlife Service Birds of Conservation Concern [FWS BCC], The American Bird Conservancy Green List [ABC Green List], The U.S. Bird Conservation [USBC] Watch List, The Western Bat Working Group [WBWG], and The Xerces Society). HMP Status: Covered = HMP Covered Species. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 50 Sensitive Fauna Sensitive wildlife species include those listed by USFWS (2005a, 2005b, and 1999), CDFG (2005 and 2004), and those considered regionally or locally sensitive by the City, local jurisdictions, and private groups. The CNDDB does not list any sensitive species within the Lake Calavera Trails study area. However, 13 sensitive fauna species were detected on-site, they include the western spadefoot, monarch, white-tailed kite (Elanus leucurus), northern harrier, sharp-shinned hawk (Accipiter striatus), Cooper's hawk, Nuttall's woodpecker (Picoides nuttallii), loggerhead shrike, coastal California gnatcatcher, California thrasher, yellow warbler, yellow-breasted chat, and tricolored blackbird (Agelaius tricolor). Although no nests were observed during the surveys, it is possible for the raptor species to nest on-site within southern coast live oak riparian forest or southern willow scrub. The locations of these sensitive species are shown on previous Figure 4 and discussed in Table 8. One monarch was observed on-site. Monarchs typically migrate through southern California during the months of March through April; therefore, the individual observed on-site is presumed to be a migrant. For this reason, M&A biologists did not map the location of the observed individual on previous Figure 4. In addition, a sharp-shinned hawk was observed flying over the site and therefore not mapped on previous Figure 4. Although not recently observed on-site, the following sensitive species were identified during a previous M&A investigation (M&A 2002, Revised 2003): western least bittern (Ixobrychus exilis hesperis), California horned lark (Eremophila alpestris actia), and Southern California rufous- crowned sparrow (Aimophila ruficeps canescens). Additional sensitive fauna, which could potentially be found on-site are described within Table 9. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 51 Table 8.Sensitive Fauna Species Observed On-site Scientific Name Common Name Habitat Federal Status State Status HMP Status Spea (=Scaphiopus) hammondii western spadefoot The western spadefoot is known to occur on-site due to the observation of desiccated larvae in one the ephemeral pools (P6) during the course of the fairy shrimp surveys. Spadefoot toads prefer sandy or gravelly soil in grasslands, sage scrub, open chaparral, and pine-oak woodlands; grasslands with shallow temporary pools None CSC None Danaus plexippus monarch Observed one individual on a mustard stalk within non- native grassland in the northeastern portion of the study area. Monarchs typically migrate through southern California during the months of March through April; therefore, the individual observed on-site is presumed to be a migrant. Roosts are located in wind-protected tree groves (eucalyptus, Monterey pine (Pinus radiata) and cypress (cypress spp.) with nectar and water sources nearby). None SA None Elanus leucurus white-tailed kite Observed throughout the study area, predominantly within the southern willow scrub. Typically found near grasslands, agricultural fields, and open habitats with areas of dense deciduous trees for nesting. None Fully Protected (nesting) None Circus cyaneus northern harrier Observed within southern willow scrub adjacent to Diegan coastal sage scrub and non-native grassland as well as flying over non-native grassland within the north-central portion of the study area. Typically occurs in grassland, agricultural fields, fresh and saltwater mashes and desert sinks. None CSC (nesting) None Accipiter striatus sharp-shinned hawk Observed flying over the study area within the southwestern portion of the site (west of the dam). Typically located within mixed woodlands near open areas but not restricted to riparian habitats. None CSC (nesting) None Accipiter cooperii Cooper’s hawk Observed perched within southern willow scrub. Occurs within oak, riparian deciduous or other woodland habitats usually near water. None SA Covered Picoides nuttallii Nuttall's woodpecker Detected throughout the site within wetland habitats. Permanent resident of low-elevation, riparian deciduous and oak habitats. None SA (nesting) None Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 52 Scientific Name Common Name Habitat Federal Status State Status HMP Status Lanius ludovicianus loggerhead shrike Detected within chamise chaparral. Typically found within grassland or open habitats with bare ground and sparse shrub and/or tree cover for nesting and perching. None CSC (nesting) SA None Polioptila californica californica coastal California gnatcatcher Observed throughout the study area, typically within Diegan coastal sage scrub. Occurs within various successional stages of sage scrub. FT CSC SA Covered Toxostoma redivivum California thrasher Detected throughout the study area within sage scrub vegetation communities. Typically found within moderate to dense montane chaparral up to 6,600 ft. and occasionally in extensive thickets in young or open valley foothill riparian habitat. None SA None Dendroica petechia brewsteri yellow warbler Observed throughout the southern willow scrub. Typically found within riparian woodlands, especially of willows. None CSC (nesting) SA None Icteria virens yellow-breasted chat Observed within the southern willow scrub within the central portion of the study area. Probable foraging on-site as migrant. Typically found within riparian woodland/scrub with dense undergrowth. None CSC (nesting) SA Covered Agelaius tricolor tricolored blackbird Observed within the southern willow scrub as well as coastal valley and freshwater marsh habitats within the northeastern portion of the study area. It is unknown if this species is nesting on-site since they generally require more extensive marshes for nesting. Typically feeds in grasslands and croplands, breeds near freshwater preferably in marshes or other emergent wetlands. None CSC (nesting) SA None Note: Codes located on page 58. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 53 Table 9.Sensitive Fauna Species Not Found On-site but Potentially Present Scientific Name Common Name Suitable Habitat Probability of Occurrence Federal Status State Status HMP Status Branchinecta sandiegoensis San Diego fairy shrimp Small, seasonal claypan puddles and pools less than 30 cm deep. Most commonly found in a 50 km wide strip of San Diego county associated with coastal sage scrub and annual grasslands. Protocol surveys were negative for the presence of listed vernal pool branchiopods (M&A 2005). FE SA Covered Streptocephalus woottoni Riverside fairy shrimp Found in various pools in Western Riverside, Orange and San Diego Counties. Pools are at elevations ranging from 30-415 m in seasonal grasslands, which may be interspersed among chaparral or coastal sage scrub vegetation. Protocol surveys were negative for the presence of listed vernal pool branchiopods (M&A 2005). FE SA Covered Euphydryas editha quino Quino checkerspot Open grassland and openings within shrub habitats that support dot-seed plantain (Plantago erecta). Not expected. Study area is north of known locations. The Lake Calavera Trails site is not located within the USFWS recommended survey area. FE SA Covered Euphyes vestris harbisoni Harbison’s dun skipper Riparian oak woodland in a matrix of chaparral with moist conditions that support its host plant San Diego sedge. Moderate to low. Seldom occurs within 10 miles of the immediate coast; however, host plant located on-site. None SA Covered Lycaena hermes Hermes copper Openings in chaparral, associated with the larval host plant spiny redberry, adults feed on nectar from flat-top buckwheat. Low. Site is generally northwest of current known range. None SA Covered Panoquina errans wandering (saltmarsh) skipper Salt marshes along the southwestern coast. Caterpillar host is saltgrass. Moderate. None SA Covered Bufo microscaphus californicus arroyo southwestern toad Shallow pools, open sand, and gravel flood terraces of intermittent to perennial streams; may also occupy adjacent upland communities within 1.2 km. Not expected. No suitable habitat located on-site. FE CSC SA None Rana aurora draytonii California red- legged frog Quiet permanent stream pools, marshes, and ponds. Low to none, species likely extirpated from southern California. FT CSC SA None Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 54 Scientific Name Common Name Suitable Habitat Probability of Occurrence Federal Status State Status HMP Status Emmys (=Clemmys) marmorata pallida Southern Pacific pond turtle Permanent or nearly permanent bodies of water below 600 ft. Require basking sites such as partially submerged logs, vegetation mats or open mud banks. Surveyed for this species during previous M&A investigations (2002, Revised 2003). Previous surveys included placing turtle- traps overnight in two potential haul-out areas. No turtles were captured; however, additional trapping surveys would be required to more effectively determine presence/absence. None CSC SA None Phrynosoma coronatum blainvillii San Diego horned lizard Chaparral, sage scrub, oak woodlands, and grasslands; sometimes occurs along seldom used dirt roads where native ant species are prevalent. High. Known from upland areas along Agua Hedionda Creek, just south of the site. None CSC SA None Eumeces skiltonianus interparietalis Coronado skink Variety of habitats including grasslands, sage scrub, and various woodlands including oak, pine, juniper, and riparian. Moderate. None CSC SA None Aspidoscelis hyperythra beldingi orange-throated whiptail Open sage scrub and chaparral, prefers sandy areas with patches of brush and rocks. High. Known from upland areas along Agua Hedionda Creek, just south of the site. None CSC SA Covered Aspidoscelis tigris stejnegeri coastal western whiptail Coastal sage scrub, chaparral, and grasslands. High. None SA None Lichanura trivirgata(= Charina trivigata roseofusca) (= coastal) rosy boa Rocky outcrop areas within chaparral and sage scrub. High. None SA None Diadophis punctatus similis San Diego ring- necked snake Chaparral, forest, and grasslands, most common in moist, rocky areas. Moderate to high. None SA None Salvadora hexalepis virgultea coast patch- nosed snake Chaparral and sage scrub; may require mammal burrows or woodrat nests for overwintering. Moderate to high. None CSC SA None Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 55 Scientific Name Common Name Suitable Habitat Probability of Occurrence Federal Status State Status HMP Status Thamnophis hammondii two-striped gartersnake Associated with semi-permanent and permanent bodies of water in a variety of habitats; requires a relatively dense riparian border. Moderate to high. None CSC SA None Crotalus ruber red diamond rattlesnake Occupies rocky outcrops and areas of heavy brush or rugged terrain in chaparral, sage scrub, or desert scrub on both coastal and desert slopes, usually below 4000 feet. Moderate to high. None CSC SA None Aimophila ruficeps canescens Southern California rufous-crowned sparrow Rocky hillsides supporting sparse, low scrub or chaparral, sometimes mixed with grasses. High. Observed on-site during previous M&A investigations (2002, Revised 2003). None SA Covered Amphispiza belli belli Bell’s sage sparrow Relatively open chaparral (i.e., chamise chaparral) and sage scrub; Non- fragmented, contiguous areas on relatively flat terrain appear to be preferred. Low. None SA (nesting) None Aquila chrysaetos golden eagle Nests in cliffs (or trees), found in generally mountainous or hilly terrain; forages in grasslands, deserts, and shrubby habitats. Low to none. Urbanization of areas has eliminated isolation required for nesting. Occasional wintering individuals may forage over open terrain in area. None CSC/FP (nesting) None Ardea herodias great blue heron Rookerys located in tall trees near water Observed individuals but did not observe any rookerys on-site. None SA (nesting) None Athene cunicularia burrowing owl Occurs in open dry grasslands, agricultural, rangelands and desert habitats. Inhabit grass, forb, and shrub stages of pinyon and ponderosa pine habitats as well as airports, golf courses, and vacant urban lots. Low. Known locations south and west of the Lake Calavera Trails study area. None CSC SA Covered Empidonax traillii extimus southwestern willow flycatcher Riparian woodland. No southwestern willow flycatchers were detected on the project site during the focused surveys performed by M&A biologists (M&A 2005). FE SA Covered Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 56 Scientific Name Common Name Suitable Habitat Probability of Occurrence Federal Status State Status HMP Status Eremophila alpestris actia California horned lark Grasslands, disturbed areas and open habitats with sparse, low vegetation. High. Detected on-site during previous M&A investigations (M&A 2002, Revised 2003). Good open terrain habitat exists on-site for migrants as well as nesting. None CSC SA None Falco peregrinus anatum American peregrine falcon Most frequent along or near coast around mudflats, shores or ponds. Low. Low tolerant of urbanization but inaccessible sites required for nesting. Most likely would occur as migrant. None SE/FP SA Covered Ixobrychus exilis least bittern Large brackish and freshwater marshes. High. Observed on-site during a previous M&A investigation, located within the marsh fringing the lakeshore (M&A 2002, Revised 2003). None CSC (nesting) None Pandion haliaetus osprey Along the coast and inland waters. Forages over lagoons, bays, and lakes; primarily hunting for fish. Low. Forages at Agua Hedionda Lagoon and may occasionally fly over Lake Calavera in foraging or as a migrant. None CSC (nesting) SA Covered Passerculus sandwichensis beldingi Belding’s savannah sparrow Salt and brackish marshes along the coast; nests in Salicornia Sp. Low to none. Requires extensive salt marsh habitat. None SE SA Covered Passersulus sandwichensis rostratus large-billed savannah sparrow Marshes and beach areas. Low to none. Requires extensive salt marsh habitat. None CSC (nesting) Covered Pelecanus occidentalis californicus California brown pelican Estuaries, coastal saltwater, and open ocean. None. Coastal species. FE SE FP SA (nesting) Covered Phalacrocorax auritus double-crested cormorant Coastal bays, lagoons, and estuaries, and inland lakes. Individuals observed on-site; however, no rookeys observed. None CSC SA (nesting) None Plegadis chihi white-faced ibis Forages near freshwater ponds, rivers, irrigated fields, and brackish lagoons. Low. May rarely forage in wetlands on-site. May possible occur as a migrant or winter visitor. None CSC SA (nesting) Covered Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 57 Scientific Name Common Name Suitable Habitat Probability of Occurrence Federal Status State Status HMP Status Rallus longirostris levipes light-footed clapper rail Tidal salt marshes that support California Cord Grass (Spartina foliosa). None. Coastal species. FE SE FP SA Covered Sterna antillarum browni California least tern Sandy ocean beaches, drying margins of lagoons, tidal mudflats, and salt pond levees. None. Coastal species. FE SE FP SA (nesting) Covered Sterna elegans elegant tern Coastal estuaries, salt ponds, and coastal bays. None. Coastal species. None CSC SP (nesting) Covered Vireo bellii pusillus least Bell’s vireo Moist woodlands, typically early successional riparian habitat. No least Bell’s vireos were detected on the project site during the focused surveys performed by M&A biologists (M&A 2005). FE SE SP (nesting) Covered Eumops perotis western bonneted bat Extensive open areas with abundant roost locations in rock outcrops, (found where oaks and chaparral occur). See Macrotus californicus. Moderate. None CSC SA None Lasiurus blossevillii western red bat Occurs in CA in coastal lowlands and roosts in large shrubs and fruit trees. See Macrotus californicus. Moderate. None SA None Macrotus californicus California leaf- nosed bat Roosts in rocky, rugged terrain with mines and caves and forages over nearby flats and washes. Lake Calavera and the surrounding area provide abundant habitat for insects, arthropods, and lepidopterans. This in turn provides a major food resource for bats. Roosting resources for potentially resident and migratory species are offered by adjoining riparian woodland and rock formations on Mount Calavera. The reservoir itself concentrates prey for species that forage over or near aquatic features. Moderate. None CSC None Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 58 Scientific Name Common Name Suitable Habitat Probability of Occurrence Federal Status State Status HMP Status Myotis yumanensis saturatus Yuma myotis Utilizes multiple habitats (primarily woodlands and forests) but forages over water. See Macrotus californicus. Moderate. None SA None Corynorhinus townsendii Townsend's western big- eared bat Cave rooster, feeds in forest/woodland habitats or along habitat edges within 15 km of roost site. See Macrotus californicus. Moderate. None CSC SA None Chaetodipus fallax fallax northwestern San Diego pocket mouse Found in coastal sage scrub. Moderate to high. None CSC SA None Lepus californicus bennettii San Diego black-tailed jackrabbit Relatively open chaparral and sage scrub and grasslands. High. Site supports suitable habitat. None CSC SA None Neotoma lepida intermedia San Diego desert woodrat Chaparral, particularly abundant in areas of rock outcrops. Moderate to high. Site supports suitable habitat. None CSC SA None Federal: FE = Federally-listed as Endangered; FT = Federally-listed as Threatened; FPE = Federally proposed for listing as Endangered; FPT = Federally proposed for listing as Threatened; FPD = Federally proposed for delisting; FC = Federal candidate species (former Category 1 candidates); SC = Species of concern (list established by the National Marine Fisheries Service [NMFS] effective April 15, 2004); Delisted species are monitored for 5 years. State: California Endangered Species Act (CESA) Listing Codes: SE = State-listed as Endangered; ST = State-listed as Threatened; SCE = State candidate for listing as Endangered; SCT = State candidate for listing as Threatened; SCD = State candidate for de-listing; SR = California Rare Species. California Department of Fish and Game (DFG) Sensitivity Codes: CSC = Species of Special Concern;; FP = California fully protected species; SR = State-listed rare California Native Plant Society (CNPS) Sensitivity Codes: List of Species Designation: 1A = Plants presumed extinct in California; 1B = Plants rare, threatened, or endangered in California and elsewhere; 2 = Plants rare, threatened, or endangered in California, but more common elsewhere; 3 = Plants about which more information is needed (a review list); 4 = Plants of limited distribution (a watch list). California Natural Diversity Database (CNDDB) Sensitivity Codes: Special Plants (SP)/SPs (SA) = A general term that refers to all of the taxa the CNDDB is interested in tracking, regardless of their legal or protection status HMP Status: Covered = HMP Covered Species. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 59 Focused Wet Season Sampling for the Federally Listed, Endangered Vernal Pool Branchiopods Many factors are important for a depression to function as a “vernal pool”; among them are soil conditions, pool hydrology, and water chemistry. Pools must form in a close depression underlain by a nearly impermeable layer of hardpan or claypan in order for water to pool and remain in the basin. The soils are a clay variety and water ponds readily in several depressions on-site. Survey results have revealed a very disturbed and artificially created ephemeral pool community of the Lake Calavera Trails project site (Table 10, Figure 7). Miscellaneous tire depressions and shallow swales scattered along the trail system have created numerous pools capable of supporting various aquatic organisms. No mesa or mima mound topography was present within the study area. All of the depressions sampled during the current investigation pooled water of various durations. In pools containing clear water visual surveys was made prior to dipnetting for fairy shrimp. Observations of animals in pooled water and/or captured in the dipnet were recorded. Fairy shrimp were documented on-site. Only the versatile fairy shrimp was collected on the project site during the protocol surveys. Versatile fairy shrimp were found within individual pools P1, P9, and within the pool complex P17 located along the top of the dam-access road. Table 10.Habitat Physical/Hydrological Conditions and Fairy Shrimp Detection Rate at Survey Points Survey Point Habitat Descriptor Known days of continual inundation # of surveys surface water present during six surveys Date(s) fairy shrimp detected P1 Tire ruts > 14 days 2/6 28 Feb 2005 P2 Tire ruts > 1 day 1/6 < none > P3 Tire ruts > 1 day 1/6 < none > P4 Road/trail pool > 64 days 3/6 < none > P5 Road/trail pool > 70 days 3/6 < none > P6 Tire ruts > 64 days 2/6 < none > P7 Road/trail pool > 1 day 1/6 < none > P8 Road/trail pool > 92 days 4/6 < none > P9 Road/trail pool > 64 days 3/6 7 Feb 2005 P10 Road/trail pool > 64 days 3/6 < none > P11 Road/trail pool > 50 days 2/6 < none > P12 Road/trail pool > 50 days 2/6 < none > P13 Road/trail pool > 1 day 1/6 < none > P14 Road/trail pool > 1 day 1/6 < none > P15 Road/trail pools > 1 day 1/6 < none > P16 Road/trail pool < 1 day 0/6 < none > P17 Road/trail pool complex > 92 days 4/6 28 Feb 2005 P18 Road/trail pool < 1 day 1/6 < none > P19 Road/trail pool < 1 day 1/6 < none > $T $T $T $T $T $T $T $T $T $T $T$T $T $T $T $T $T $T $T $T $T$T $T #³ $T$T $T$T$T $T $T $T $T $T rr r r r r r rr rrrr r r rrrrrr r r r rrrr r r r r p1 p2 p3 p4 p6 p8 p9 p5 p7 p10p11 p12p13p14p15 p17 p18 p19 p16 N EW S Figure 7 Ephemeral Pool Locator Map Lake Calavera Trails Project M&A #04-101- T am arack A ve. Other P# = Survey Point Ephemeral Pools r road/trail pool r tire rut Study Area Proposed Trails Type A (Hikers/Bicyclists 10-12 feet wide) Existing Water District/SDG&E Rd. Type B (Hikers/Bicyclists 4-8 feet wide) Type C (Hikers only 2-6 feet wide) 200 0 200 400 600 Feet Proposed Trail Amenities $T $T $T Access Point Connection to City Wide Trails $T Information Kiosk $T Litter Receptacle / Dog Waste Station $T Picnic Table $T View Point/Interpretive Signage Access Point Connection to Street/Sidewalk Access Point Connection to Other Trail Systems Wood Timber Stair#³ Portable Restroom$T SkyHavenLn. Lake Blvd. Merkel & Associates, Inc. T a m a ra ck A v e . Barrier Fencing Boardwalk Official Offsite Trail System # Carlsbad Municipal Water District Easement Road # SDG&E Easement Road # Carlsbad Municipal Water District Easement Road # CDFG Owned Trails # CDFG Owned Trails # SDG&E Easement Road Oak Riparian Park # City of Oceanside Trail 2008 Aerial Image from City of Carlsbad # Calavera Hills Trail Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 61 Pool hydrology is also a key factor in determining the viability of a potential vernal pool. The depth and duration of standing water are the most important environmental factors affecting vernal pools (Zedler 1987). For aquatic organisms like fairy shrimp, there is a strong link between water regime and survival. Some of the basins supported standing water for extended durations but no pools were considered to have depths greater than typical or more natural vernal pools. The current survey series was conducted during optimal conditions for fairy shrimp observations. Numerous rain events and abundant precipitation characterized the current wet season. These conditions filled and re-filled the on-site pools throughout the survey period. These rain events were often followed by periods of moderate to warm daytime temperatures. These types of conditions are conducive to the cycles of fairy shrimp species found in San Diego County. Current wet season sampling of the project site has revealed positive results for the presence of the versatile fairy shrimp. Common widespread invertebrate species, such as ostracods and mosquito larvae, were also detected in the majority of pools, while the versatile fairy shrimp was detected in pools P1, P9, and P17-pool complex (previous Figure 7). The on-site climatic conditions during the current survey series were considered ideal for a fairy shrimp hatch. Hathaway and Simovich (1996) reported that cysts of the San Diego fairy shrimp require 8 days to hatch at 5° C, but that period is shortened to 3-5 days at temperatures between 10°- 15° C. Once larvae emerge, in the field where temperatures oscillate, 10-20 days are needed before the animals mature. Once mature, these animals can live for as long as three weeks (Eriksen and Belk, 1999). Temperatures recorded during the current survey series ranged from 14.5°–21°C throughout the fourteen-week time span. These conditions would likely have resulted in a hatch should these animals have been present within any of the inundated depressions sampled during the survey. Consequently, it is unlikely that the San Diego fairy shrimp is present on the project site due to the lack of detection during the period of time when detection probability was very high. No obligate vernal pool plant species were detected. As previously mentioned all of the pools/swales surveyed appeared to be created by human disturbance and/or activities (i.e., vehicle tire ruts) and are subject to regular disturbances by recreationalists such as hikers and cyclists. In regard to the presence of the versatile fairy shrimp occurring in P9, an atypical heavily shaded pool, it is possible that the cysts are transported in mud stuck to the boots of hikers and/or tires of mountain cyclists from the more typical unshaded pools (P17-complex). It has been demonstrated that cysts are occasionally transported by wildlife such as the digestive tracks of birds and potentially the feet and fir of mammals (Proctor et al. 1967, Eriksen and Belk 1999). The San Diego fairy shrimp, a species that is known to colonize created ephemeral pool habitats such as road ruts on dirt roads but is more often associated with higher quality vernal pools (i.e., lower disturbance frequency), was not identified within the pools within the Lake Calavera Trails project study area. In regard to the Riverside fairy shrimp, no suitable habitat was found within the project site. The Riverside fairy shrimp is known to require long-lived ephemeral pool habitat that is comparatively large (some exceeding 750 m2) and deep ( 30 cm) (Eriksen and Belk 1999). Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 62 Focused Least Bell’s Vireo and Southwestern Willow Flycatcher Surveys No least Bell’s vireos and no southwestern willow flycatchers were detected on the project site during the focused surveys. Brown-headed cowbirds (Molothrus ater) were detected within the northeastern portion of the study area (previous Figure 4). Tricolored blackbirds (Agelaius tricolor) were also detected within the northeastern portion of the study area. As described within the Methods Section, M&A biologists previously surveyed the western portion of the Lake Calavera Trails study area (approximately 15 acres of potential vireo and/or flycatcher habitat) as part of the Lake Calavera Improvements project (M&A 2004). Focused Coastal California Gnatcatcher Surveys All coastal California gnatcatchers identified within the study area have been mapped within this biological resources report (previous Figure 4). A total of 10 coastal California gnatcatchers were detected on the project site during the focused surveys. Due to seasonal constraints on plumage assessment, we assigned only tentative male/female pair status to gnatcatchers; however, the 10 gnatcatchers comprise potentially 4 pairs and 2 unpaired individuals. A total of 4 territories potentially exist on-site. One male/female pair was consistently observed during Survey #’s 1, 2, and 3 just west of the dam. The sightings extended north to the Diegan coastal sage scrub upslope of the dam (off-site) to just southwest of the dam within Diegan coastal sage scrub and disturbed habitat. The gnatcatchers responded to the tape vocally, and they were visually seen for several minutes. This male/female pair is presumed to occupy one territory, which as described above, extends from Tamarack Road, south to the area just west of the dam. One male/female pair was detected consistently within the southeastern portion of the study area. This pair is presumed to occupy one territory, which extends from eastern most boundary, westward just past the SDG&E access path. The pair responded to the tape vocally and visually during all the surveys. Within the same area, one individual gnatcatcher was detected consistently during the protocol surveys. The individual responded to the tape vocally during all surveys and was visually seen during Survey #’s 1, 2, and 3. During Survey #2, a fair amount of brown tint was observed on the individual gnatcatcher. It was determined that the individual is not an adult male. Due to seasonal constraints on plumage assessment, M&A biologists were unable to determine the sex or age of the individual. To determine the presence of 3 gnatcatchers, M&A biologist(s) detected and monitored the individual while the permitted biologist played the tape several hundred feet away and detected the pair of gnatcatchers. The 3 gnatcatchers were detected predominantly within Diegan coastal sage scrub; however, they were also observed within chamise chaparral and non-native grassland. One individual gnatcatcher was identified during Survey #1 in the northeastern portion of the study area within Diegan coastal sage scrub. The individual responded to the tape vocally and visually for several moments. Due to seasonal constraints on plumage, it was determined that this individual was not an adult male and possibly a dispersing juvenile. Since this individual was only observed once, this area is not currently classified as a territory; however, it is considered occupied habitat. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 63 Two individuals (assumed to be a male/female pair) were observed during Survey #’s 1 and 2 just southwest of Sky Haven Lane within Diegan coastal sage scrub. The gnatcatchers responded to the tape vocally, and they were visually seen for several minutes. Due to the coloration between the 2 gnatcatchers, the male was determined to be the individual with the darker head and black eye stripe, while the other individual was determined to not be an adult male due to the brown wash over the body. Two individuals (assumed to be a male/female pair) were detected during Survey #’s 2, 3, and 4 just west of the aforementioned pair and east of the pair located within the vicinity of the dam. The pair was observed flying within Diegan coastal sage scrub as well as mule fat scrub. The male/female status was based upon plumage observation, as well as calls. During Survey #4, 2 individual gnatcatchers were observed for a short period of time within this same vicinity. They were not observed together; however, they were observed within 100 feet of one another within Diegan coastal sage scrub. M&A biologists were unable to determine the age or sex of the gnatcatchers; however, one individual appeared to be fairly dark. It should be noted that a Cooper’s hawk was observed perched on a powerline within the vicinity. Once the hawk was observed, the tape was no longer played and the biologists left the area immediately. It is presumed that the gnatcatchers observed within this location are the same pair and they occupy one territory. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 64 PROJECT IMPACT ANALYSIS THRESHOLDS OF SIGNIFICANCE California Environmental Quality Act (CEQA) guidelines 15065 state that a project may have a significant effect on the environment if: “The project has the potential to substantially degrade the quality of the environment, substantially reduce the habitat of a fish and wildlife species, cause a fish or wildlife population to drop below self-sustaining levels, threaten to eliminate a plant or animal community, reduce the number or restrict the range of an endangered, rare or threatened species, or eliminate important examples of the major periods of California history or prehistory.” “The project has the potential to achieve short-term environmental goals to the disadvantage of long-term environmental goals.” “The project has possible environmental effects which are individually limited but cumulatively considerable.” Biological resources generally considered significant include: vegetation communities that support sensitive flora or fauna species; unique vegetation communities that are limited in distribution and have a critical ecological role; and habitats supporting species considered rare, threatened, or endangered by the agencies that enforce the Federal and California Endangered Species Act. It is important to note that the significance of a given activity is variable according to the environmental setting. For the purposes of this technical report, a significant biological resources impact has been assessed if implementation of the proposed project would result in: Inconsistency with the MHCP or City’s HMP; Impacts to federally or state listed species, including impacts to occupied habitats, outside of those impacts covered by the MHCP; Impacts to MHCP narrow endemic species; or Loss of a “significant population” of a sensitive species; where the loss would substantially reduce the likelihood of the survival and recovery or restrict the range of the species. Impacts to non-sensitive habitats are generally not considered significant. If, however, the densities of sensitive species within the habitat were sufficiently high or the habitat functioned as an important wildlife movement corridor, habitat linkage, or crucial foraging habitat, impacts could be considered significant. DIRECT IMPACTS CEQA guidelines §15358 define a “direct impact or primary effect” as “effects which are caused by the project and occur at the same time and place” that can produce a temporary or permanent biologically significant, “physical change” in the environment. Type A (10-12 feet), Type B (4-8 feet), and Type C (2-6 feet) final trail widths are dependent on the sensitivity of the surrounding vegetation communities. However, for purposes of determining impacts, M&A has calculated impacts to the greatest width possible. For example, the Type C maximum impact calculation is 6 feet; however, the implemented on-site trail may be limited to 3 feet as a result of surrounding vegetation. The one exception to this rule is at an existing Type A trail Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 65 (approximately 8 feet wide), which has a narrow crossing over a culvert and thus cannot have an impact maximum of 12 feet. Trail amenities would be installed within proposed trails; thus, installation of these structures are not expected to result in additional impacts with the exception of the picnic table located on the southern side of the lake which extends slightly outside of the trail. All trails and trail amenities are considered permanent impacts. This includes the boardwalks which are all 6 feet in width; however, construction of these structures will require a construction zone of 8 feet; thus, 2 feet are considered temporary impacts. Upland Vegetation Communities Direct Impacts The Lake Calavera Trails project would result in direct impacts to upland vegetation communities (Table 11, previous Figures 3a and 4). Table 11. Quantitative Summary of Upland Vegetation Community Direct Impacts from the Proposed Project Impact Acreage Upland Vegetation Community HMP Habitat Group1 Existing Acreage Permanent Temporary Total Impact Acreage Disturbed Valley Needlegrass Grassland Group B 7.43 0.02 --- 0.02 Diegan Coastal Sage Scrub Group C 71.29 0.11 0.02 0.13 Coastal Sage-Chaparral Scrub Group C 0.46 --- --- --- Southern Mixed Chaparral Group D 53.84 0.05 --- 0.05 Chamise Chaparral Group D 13.96 0.02 --- 0.02 Non-native Grassland Group E 38.73 0.22 --- 0.22 Disturbed Habitat Group F 19.14 4.93 0.01 4.94 Non-native Vegetation Group F 1.04 0.001 --- 0.001 Urban/Developed Group F 0.34 0.22 --- 0.22 Total: 206.23 5.57 0.03 5.60 1 Group C habitats are occupied by the coastal California gnatcatcher. 2 Percent impacted on-site is the impact acreage in comparison to the grand total upland acreage. Impacts to disturbed valley needlegrass grassland, Diegan coastal sage scrub, southern mixed chaparral, chamise chaparral, non-native grassland, and disturbed habitat are significant per the City’s HMP and would require that project mitigation measures be implemented to reduce impacts to a level below significant. Impacts to non-native vegetation are not considered significant and therefore do not require mitigation. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 66 Jurisdictional Wetlands and Non-wetland Resources Direct Impacts The proposed trail system would result in direct impacts to jurisdictional wetland habitat types and non-wetland waters of the U.S./streambed (Table 12; previous Figures 3a and 4). Since the ephemeral pools identified on the site have been determined not to constitute vernal pools and support no sensitive species, these have been collapsed into the non-wetland waters of the U.S./streambed habitat types for further tracking. Table 12. Quantitative Summary of Jurisdictional Wetlands and Non-Wetland Resources Direct Impacts from the Proposed Project Total Impact Acreage Permanent Temporary Wetland Vegetation Community HMP Habitat Group1 Existing Acreage ACOE/ CDFG CDFG ACOE/ CDFG CDFG Total Impact Acreage Disturbed Wetland Group A 0.21 --- 0.002 --- --- 0.003 Non-Wetland Waters of the U.S./Streambed (Open Water) Group A 13.08 --- --- --- --- --- Cismontane Alkali Marsh Group A 0.60 --- --- --- --- --- Coastal and Valley Freshwater Marsh Group A 9.84 0.05 --- 0.05 --- 0.10 Southern Coast Live Oak Riparian Forest Group A 3.29 0.002 0.04 --- 0.04 0.08 Southern Coast Live Oak Riparian Forest Group A3 0.67 0.004 --- 0.004 Mule Fat Scrub Group A 2.25 --- 0.001 --- --- 0.001 Mule Fat Scrub Group A3 0.07 --- --- --- Southern Willow Scrub Group A 22.44 0.02 --- 0.02 --- 0.04 Coast Live Oak Woodland Group A4 3.99 --- --- --- Non-Wetland Waters of the U.S./Streambed (Drainages) Group A 0.89 0.001 --- --- --- 0.001 Total: 57.33 0.07 0.05 0.07 0.04 0.23 1 Impacts to Group A habitat types are subject to review under Section 404 of the federal Clean Water Act or under Section 1600 of the California Fish and Game Code. 2 Percent impacted on-site is the impact acreage in comparison to the total jurisdictional acreage. 3 As described within the above habitat description, several patches of these communities were determined to not be jurisdictional. For purposes of summarizing the grand total impact, the impacted amount was added to the CDFG column. 4 As described within previous Table 3, the majority of coast live oak woodland was not determined to be jurisdictional; however, the City’s HMP classifies this vegetation community as associated with wetlands. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 67 Impacts to jurisdictional wetlands and non-wetland waters of the U.S./streambed are significant per the City’s HMP and would require that project mitigation measures be implemented to reduce impacts to a level below significant and achieve a no net loss of wetlands functions and values. Sensitive Species Direct Impacts Approximately 29 spiny rush plants would be directly impacted from the Lake Calavera Trails project. Spiny rush populations in San Diego County are now relatively stable despite several decades of losses associated with widespread regional reductions in wetlands. The direct impacts to spiny rush, a California Special Plant, are not considered significant as the loss of these plants is not expected to threaten to eliminate a plant community and thus would not require project mitigation measures. However, the City has agreed to include container plants of spiny rush within the wetland mitigation planting plan. No direct impacts to the California Special Plant, clay-field goldenbush, western dichondra, and California adolphia are expected. However, it should noted that a view point/interperative signage associated with the southwestern spur Type B – Hikers/Bicyclists trail is expected to occur within the immediate vicinity of western dichondra. To reduce the potential of trail widening within this area, barrier fencing would be installed within the vicinity of this plant to reduce the possibility of impacts. Although other trails throughout the study area are proposed to occur within the vicinity of plants classified as California Special Plants, there are no proposed trail amenities associated with the trails; thus, no further recommendations are included at this time. Future measures to limit recreational uses throughout the study system would be at the discretion of the City Parks and Recreation Department and/or Land Manager. Western spadefoot tadpoles, a Species of Special Concern, were identified at the north-central terminus of the SDG&E road/right-of-way in a low-lying area next to a power line. The western spadefoot toad population located on-site is not expected to be a significant population for the North County Region, furthermore, this species is known to occur in large numbers throughout wide valley bottoms and mesa tops throughout the area. Since this location resides within the SDG&E right-of- way, maintenance may be performed as required; however, if possible, it is recommended that road maintenance occur outside the breeding season which extends from approximately January to May. If this is not impossible, it is recommended that the City Parks and Recreation Department and/or Land Manager examine the low lying area for western spadefoot tadpoles and provide maintenance delay recommendations. The Lake Calavera Trails project would potentially impact the coastal California gnatcatcher through the loss of habitat, elevated noise levels, and increased human activity. Impacts to the gnatcatcher would be considered significant; therefore, project mitigation measures will be implemented to minimize the potential for direct impacts to this sensitive species. The implementation of the project would not result in removal of trees suitable for nesting by raptors, rather, where and if needed, minor twigs and branches extending into the trail would be trimmed by hand. However, impacts to nesting raptors could occur due to construction activities (ex. noise) or increased human activity, which may effectively preclude the bird from nesting. Impacts to nesting raptors would be significant per the City’s HMP and will require that project mitigation measures be implemented to minimize the potential for direct impacts to breeding species. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 68 The implementation of the project would not result in removal of trees, rather, where and if needed, minor twigs and branches extending into the trail would be trimmed by hand. However, it is possible that impacts to migratory birds could occur from vegetation removal, construction activities (ex. noise), or increased human activity, which may effectively preclude the bird from nesting. Impacts to nesting migratory birds would be significant per the City’s HMP and will require that project mitigation measures be implemented to minimize the potential for direct impacts to breeding species. INDIRECT IMPACTS CEQA guidelines §15358 define an “indirect impact or secondary effect” as “effects which are caused by the project and are later in time or farther removed in distance, but are still reasonably foreseeable” that can produce a temporary or permanent biologically significant, “physical change” in the environment. In association with direct impacts to native vegetation communities, there are usually indirect impacts to the remaining native vegetation and wildlife communities. Many of these are related to habitat fragmentation, which occurs when a native vegetation community is not entirely altered or developed, but what remains has a diminished wildlife habitat value due to edge effects and lack of connectivity. Edge effects may include increased predation pressure, increased brood parasitism, increased competition for nesting cavities from non-native species, and increased flora competition from weedy species. The Lake Calavera Trails project could result in indirect impacts to wildlife, most notably from the increased human and pet activity. These impacts would be significant per the City’s HMP, and project mitigation measures will be required to minimize the potential for impacts to sensitive species. Since access to the study area is presently uncontrolled, the Lake Calavera Trails project is expected to result in a decrease of indirect impacts caused by unrestricted on and off-trail use presently occurring. As discussed in the MHCP Consistency section and Mitigation and Monitoring Requirements section within this report, the Lake Calavera Trails project would 1) provide management and education of the area, 2) control access, 3) eliminate existing trails due to their sensitive locations and/or erosion, and 4) ensure trail maintenance on a regular basis per the Citywide Trail Maintenance Plan (City 2002). Use of the trail system by hikers and bicyclists could result in disturbance and destruction of native vegetation adjacent to the trails. Impacts could include (but would not be limited to) trampling of flora species and increased incidence of unauthorized plant collection. This indirect impact would be significant per the City’s HMP. However, through project management and trail maintenance, as specified in the MHCP Consistency section and Mitigation and Monitoring Requirements section within this report, any impacts will be less than significant. The widening of trails coupled with increased traffic by hikers and bicyclists could increase soil erosion and sedimentation. Such erosion and sedimentation may adversely affect the water quality of the adjacent wetlands. Portions of the trails that are proposed on a steep slope or similar topography and that may allow runoff into wetlands are a concern. This indirect impact would be significant per the City’s HMP. However, through project management and trail maintenance, as specified in the MHCP Consistency section and Mitigation and Monitoring Requirements section within this report, any impacts to water quality will be less than significant and achieve a no net loss of wetlands functions and values. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 69 The disturbance/clearing of native vegetation could result in edge effects, including conditions suitable for non-native, weedy species intrusion within and adjacent to the HMP preserve. These indirect impacts would be significant per the City’s HMP. However, through project management and trail maintenance, as specified in the MHCP Consistency section and Mitigation and Monitoring Requirements section within this report, any edge effect impacts will be less than significant. Construction of the trail system could result in indirect impacts to wildlife, most notably from the effects of noise and fugitive dust. This impact would be significant per the City’s HMP if adverse effects to sensitive species, such as the coastal California gnatcatcher, were to occur during the breeding season; however, through project management and trail maintenance, as specified in the Mitigation and Monitoring Requirements section within this report, any indirect impacts to sensitive species will be less than significant. MHCP CONSISTENCY HMP – Section F2 Management and Monitoring Actions Approval of the HMP in 2004 designated the Lake Calavera Project site as receiving the same conservation status as existing hardline areas and designated the lands as open space (City Adopted 2004, Section D, page D-14). The Lake Calavera Trails project is an allowed use within the preserve as long as the guidelines on page F-7 through F-24 of the City’s HMP are followed. This would ensure consistency with the MHCP and the long-term viability of wildlife and sensitive habitats in the FPA (City Adopted 2004). Per Section F2, page F-11, B-Recreation and Public Access, of the City’s HMP, “Recreational uses of the preserve, where allowed, must be consistent with the protection and enhancement of biological resources” (City Adopted 2004). The existing non-official trails occur within wetland and sensitive upland communities. The City has designed the proposed trail system to avoid wetland and sensitive communities to the greatest extent feasible via: 1) Elimination/closure of many existing trails, 2) Closure of trails that currently extend into wetland and upland communities using wood pole barrier fencing at trail junctions identified with “Trail Closed” signage, 3) Elimination of wetland crossings where possible, 4) Installation of boardwalks through wetland habitats to contain trail users and eliminate trail expansion/impacts during the winter season;, 5) Installation of directional fencing along designated trails, and 6) Regular and/or as needed trail maintenance per the Citywide Trail Maintenance Plan (City 2002). Impacts from the proposed project would result in the permanent and temporary loss of 5.69 and 0.14 acres, respectively for a total impact of 2.21 percent of the project site from trail enhancement and/or widening. The sensitive biological resources associated with Lake Calavera are extensive and cannot be fully avoided; thus, impacts to sensitive biological resources (as described within the Direct and Indirect Impacts sections of this report) are significant per the City’s HMP and would require that project mitigation measures be implemented to reduce impacts to a level below significance. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 70 Habitat Restoration and Revegetation Habitat mitigation would be required as a result of the proposed project. Please refer to the Mitigation and Monitoring Requirements section of this report. Recreation and Public Access There is currently a substantial non-official trail system throughout the study area created by various recreational activities, which has resulted in the uncontrolled loss of habitat via trail creation and widening. The proposed project would prevent this uncontrolled loss of habitat through the implementation of a monitored trail system designed to follow portions of the existing trails. Specific trails would be enhanced and widened; others would be closed to future use using wood pole barrier fencing. The sensitive biological resources associated with Lake Calavera are extensive and cannot be fully avoided. Per the HMP (page F-11), “New recreational facilities or uses will be considered based on the following guidelines”: Follow Guidelines for Future Recreational Expansion • Recognize that conservation is the first priority for the preserve system; new recreational uses can be allowed only where compatible with the conservation objectives. The purpose of the Lake Calavera Trails project is to allow managed recreational activities (i.e., hiking, non-motorized bicyclist, and maintenance) throughout the Lake Calavera site. Existing non- official trails occur throughout the site within wetland and sensitive upland communities. The implementation of the proposed project would permanently close the majority of the existing trail system, thereby, reducing uncontrolled impacts to the on-site habitat. The City has designed the Lake Calavera Trails project to avoid wetlands and sensitive upland communities to the greatest extent feasible. However, the sensitive biological resources associated with Lake Calavera are extensive and cannot be fully avoided. Thus, impacts to sensitive vegetation communities and sensitive species are significant per the City’s HMP and would require that project mitigation measures be implemented to reduce impacts to a level below significance. • Determine appropriate levels of activity within the preserve, depending on the resources to be protected, season, and successional stage. The project site would be open to the public year-round from sunrise to sunset. The site would be managed by the City Parks and Recreation Department and Center for Natural Lands Management (Land Manger) Allowed recreational activities would consist of hiking, non-motorized bicycling, and maintenance. When needed, trails would be closed for trail maintenance under the direction of the City Parks and Recreation Department and/or Land Manager and would follow the existing Citywide Trail Maintenance Plan (City 2002). Trail amenities to be installed throughout the site would include: 1) information kiosks, 2) view point/interpretative signage, 3) trail markers, 4) trail regulation signs; 5) litter receptacle/dog waste stations, 6) 2 picnic tables, and 7) one portable restroom (Figure 3a). Signage use and installation would follow the City’s Trail Signage Guidelines and Standards (2003). In addition, all proposed trail amenities would be placed within existing trails and not require the removal/trampling of habitat. Temporary closure of trails would be implemented as needed by the City Parks and Recreation Department and/or Land Manager. Trails to be closed (permanently or temporarily) would be done Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 71 so with a wood pole barrier fencing at trail junctions and would be identified as a closed trail by all weather, “Trail Closed” signs that indicate who should be contacted with regard to any questions or concerns about the site. Exact dates for temporary closure and final trail signage language would be under the direction of the City Parks and Recreation Department and/or Land Manager. All fencing would be installed within the limits of impact; thus, impacts are not expected from installation of fencing. The Lake Calavera Trails site is located within the Core 3 FPA which has been identified within the City’s HMP to contain large areas of coastal sage scrub that support critical populations of the coastal California gnatcatcher. As noted within the previous Figure 4, coastal California gnatcatchers have been identified west of the dam, along the northern boundary of the site, and within the eastern portion of the site. The proposed trails that occur within these areas cannot be eliminated or closed seasonally as they serve as access across the dam and as easement roads for SDG&E and the City Municipal Water District. The trails along the northern boundary of the lake are comprised predominantly of Type C trails; thus, reducing impacts via reduction of 1) recreational traffic (i.e., bicyclists), 2) loss of habitat, 3) noise, and 4) dust. As a result of the above, no seasonal closure of trails, which encroach on lands utilized by the coastal California gnatcatcher are proposed at this time; however, maintenance restrictions would be implemented as stated within the Mitigation and Monitoring section of this report. Gnatcatcher populations and locations are known to fluctuate and move; thus, future seasonal/tempoary closure of trails would be at the discretion of the City Parks and Recreation Department and/or Land Manager. Impacts to sensitive vegetation communities (including coastal sage scrub occupied by the gnatcatcher) and the coastal California gnatcatcher are significant per the City’s HMP and would require that project mitigation measures be implemented to reduce impacts to a level below significance. See the Mitigation and Monitoring section of the report for mitigation measures. Avoid construction or excessive recreational activities on highly erosive soils or implement appropriate erosion control measures. The proposed trails have been limited to areas that consist of less than 25 percent slope, excluding the Type C trail that terminates in the northeast at Lake Boulevard. This trail is currently utilized by hikers and bicyclists; however, upon implementation of the proposed project, it would serve as a Type C – Hikers only trail. Although there is little erosion at this connection, the trail is at a steep incline; thus, the City would install a wood timber stair (approximate 6 feet wide staircase). Construction of the staircase would require a width of 8 feet. Trails which are exposed to high erosion occurrences would be closed to the public using wood pole barrier fencing and would be indicated as a closed trail by all weather, “Trail Closed” signs. Repair and revegetation of eroded trails that are proposed to be closed would be the responsibility of the City Parks and Recreation Departments.. Ensure proper drainage of roads and parking areas to prevent erosion. All proposed trails would be graded at a minimum of 2 to 5 percent cross slope to ensure proper drainage and prevent ponding. Use native species for landscaping at the edges of the preserve, and avoid the use of non-native invasive plant species. No non-native plants would be planted as part of the Lake Calavera Trails project. Please refer to the Mitigation and Monitoring Requirements section of this report as well as the On-site Revegetation Recommendations section of this report for further details. Control of exotic plants would be Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 72 addressed within the mitigation plan; however, it would only be in reference to the specified mitigation areas. Locate roads, trails, and other recreational use areas away from sensitive or high biological areas. The sensitive biological resources associated with Lake Calavera are extensive and cannot be fully avoided; thus, impacts to sensitive vegetation communities and sensitive species (as described within the Direct Impacts section of this report) are considered significant per the City’s HMP and would require that project mitigation measures, as described within the Mitigation and Monitoring section of the report, be implemented to reduce impacts to a level below significance. Please refer to the above paragraphs to review methods of avoidance. It should be noted that an agency field meeting took place in September 2006 in response to the comments received on the MND for the Lake Calavera Trails Master Plan. The purpose of the meeting was to walk the proposed trail system and demonstrate the analysis used for determining trail improvements to existing trails and criteria used for closing many existing trails. In attendance were representatives of USFWS, CDFG, City of Carlsbad, and M&A. While on-site, it was observed that the proposed trail system had captured the existing highly utilized trails while proposing to close trails that had 1) avoidable impacts to sensitive biological resources, 2) redundant trail use, and 3) large amounts of erosion. Please refer to Figures 3a and 4 in reference to the below information. Although the proposed Type A (hikers and bicyclist) and Type C (hikers only) trails located on the north side of the lake run parallel to one another, the need to keep the proposed trails are as follows: 1) the northern most trail (Type A) currently serves as a City Municipal Water District easement road and cannot be removed nor can it be closed seasonally, 2) both trails provide for a diversity of views and experiences by passing through a variety of geographic and vegetative features, and 3) the Type C trail allows hikers to travel along the trail while avoiding bicyclists and also incorporates view points of the lake while avoiding impacts to wetlands. It should be noted that the proposed project would ensure that trail implementation and maintenance would avoid direct impacts to sensitive flora species and would occur outside the coastal California gnatcatcher and raptor breeding season. Impacts to sensitive vegetation communities (including coastal sage scrub occupied by the gnatcatcher) and the coastal California gnatcatcher are significant per the City’s HMP and would require that project mitigation measures be implemented to reduce impacts to a level below significance and achieve a no net loss of wetlands functions and values. The Type A trail located within the eastern portion of the site is currently utilized as the SDG&E easement road; thus, this trail cannot be removed or closed seasonally. The City Parks Department is responsible for maintenance of the road in coordination with SDG&E. This existing utility access route is currently graded from 10 to 12 feet; thus, no additional widening would be required. No sensitive flora species would to be impacted as a result of this trail. The coastal California gnatcatcher is known to occur within the central-eastern portion of the site; thus, mitigation measures would be implemented to reduce impacts to a level below significance. Western spadefoot tadpoles, a Species of Special Concern, were detected at the north-central terminus of the SDG&E easement road. Impacts to this species are not expected to be significant as described within the Sensitive Species Direct Impacts section of this report; thus, mitigation measures are not required. However, if possible, it is recommended that maintenance of the trail, in the identified low lying area, be performed outside the western spadefoot breeding season, which extends from January to May. Impacts to sensitive vegetation communities and sensitive species (i.e., coastal California Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 73 gnatcatcher) are significant per the City’s HMP and would require that project mitigation measures be implemented to reduce impacts to a level below significance. Three segments of Type B trails (hikers and bicyclists) cross over a drainage or are located within an area that receives seasonal saturation; thus, boardwalks are proposed to be constructed to enable safe year around crossing by trail users. From shortest to longest, the length of boardwalk required at each segment are 15, 290, and 767 feet; the width and horizontal clearance of each boardwalk would be 6 and 8 feet, respectively. This width includes a wood curb along the boardwalk to prevent users from stepping off the boardwalk (Figure 3c). It should be noted that the construction of all boardwalks would require an impact width of 8 feet. All proposed locations of boardwalks are currently in areas of high user traffic where the users have constructed unsafe bridges from driftwood and nearby debris. In addition, during months of high rainfall, users avoid saturated areas by trampling on adjacent native vegetation. The construction of boardwalks would prevent trail widening and ensure that users stay within the designated trail. A discussion of each boardwalk segment is described below: 1. The 15-foot segment of boardwalk is proposed to cross a small drainage within the south-central portion of the site and is serves at the least impactive trail connection from the southeast to the southwest of the site. The implementation of this boardwalk would impact approximately 2 special status, spiny rush plants. Only one feasible alternative is available for this trail and thus was reviewed by the City; however, the alternative, which is a trail located immediately to the north, was rejected for the following reasons: 1) an extensive amount of impacts to the wetland community southern coast live oak riparian forest would be required due to a creek crossing and vertical clearance requirements and 2) severe erosion along the upper portion of the alternative trail would require extensive work and continued maintenance. 2. The 290-foot segment of boardwalk is proposed to bisect Calavera Creek and serves as the least impactive trail connection from the southern to northern portion of the site. The implementation of this boardwalk would impact approximately 2 special status, spiny rush plants. Elimination of this segment is not feasible as it serves as a direct connection for users and is currently a highly utilized trail that if left unmonitored would continue to experience uncontrolled loss to native habitat. Creation of a trail bisecting the creek at any other location is not possible. 3. The 767-foot segment of boardwalk is proposed occur within a seasonally inundated/saturated area within the northeastern portion of the site. This trail is currently utilized on a high occurrence by hikers and bicyclists and as a result has experienced a great deal of severe unmonitored impacts due to trail users avoiding ponded and saturated areas. Implementation of this trail would impact approximately 25 special status, spiny rush plants. Alternatives to the proposed trail reviewed by the City include elimination of the trail altogether and elimination of the boardwalk with seasonal closure of the trail due to inundation/saturation during the winter season. Both alternatives have been rejected by the City for the following reasons: 1) the trail is an established trail and highly utilized by users that would continue to be used in its existing condition if not improved and 2) seasonal closure of the trail would block access for those trail users which require an easy level hike and needing to travel from the City of Carlsbad trail system to the City of Oceanside trail and park system. Impacts to sensitive vegetation communities from implementation of the above mentioned Type B trails are significant per the City’s HMP and would require that project mitigation measures be implemented to reduce impacts to a level below significant and achieve a no net loss of wetlands functions and values. Impacts to the special status, spiny rush plants are not considered significant as Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 74 spiny rush populations in San Diego County are now relatively stable. Furthermore, the City has agreed to include spiny rush within the Conceptual Wetland Mitigation and Monitoring Plan. The southern portion of the site is predominantly comprised of Type B trails, which are essential to the proposed project for the following reasons: 1) the trails provide direct connections to off-site City-wide trails (previous Figure 3a), 2) the trails provide for a diversity of views and experiences by passing through a variety of geographic and vegetative areas, and 3) the trails are established and highly utilized by the public. It should be noted that the City evaluated alternative trails within the southern portion of the site; however, due to severe erosion, which would require extensive and continuous maintenance to ensure public safety, the alternatives were rejected. No impacts to special status flora species are expected to occur as a result of Type B trail implementation in the southern portion of the site; however, the view point/interpretative signage associated with the southwestern spur trail is expected to occur within the immediate vicinity of western dichondra, California Special Plant. To reduce the potential of trail widening within this area, barrier fencing would be installed within the vicinity of this plant to reduce the possibility of impacts. The special status fauna species (i.e., California thrasher and Nuttall’s woodpecker) identified within the southern portion of the study area within the vicinity of Type B trails are not expected to be significantly impacted as a result of the trail system. No coastal California gnatcatchers were detected within this vicinity; thus, impacts are not expected. Impacts to sensitive vegetation communities are significant per the City’s HMP and would require that project mitigation measures be implemented to reduce impacts to a level below significance. The Type B trail over the dam is required and cannot be eliminated nor can it be closed seasonally. No impacts are associated with use of this trail. Per verbal communications with the City, the project to repair the dam and associated spillway structure have been performed. This is a non-related project, managed by the Carlsbad Municipal Water District and was implemented according to the Biological Impact Analysis Report – Addendum for the Lake Calavera Dam Improvement Project (M&A 2006). Impacts associated with the Dam Improvement Project will be mitigated under that project (Figure 9). The Type C trail proposed for the south-central portion of the site is an established trail located within an upland vegetation community; the need to keep this trail is as follows: 1) it provides a direct east-west connection (easy level hike) to nearby proposed trails, 2) it offers a scenic view of the Lake Calavera site, and 3) it is an established trail used by hikers. No sensitive species are expected to be impacted as a result of this trail. Impacts to sensitive vegetation communities are significant per the City’s HMP and would require that project mitigation measures be implemented to reduce impacts to a level below significance. Require dust, erosion, and noise controls on new recreational construction. As stated within the Mitigation and Monitoring Requirements section of this report, construction standard best management practices (BMP’s) would be implemented according to Appendix B of the Final MHCP Subarea Plan, Volume II. Thus, dust, erosion, and noise controls have been addressed. Require lighting use restrictions consistent with existing City lighting guidelines within 200 feet of the preserve. Direct lighting in adjacent areas away from the preserve. All construction work would occur during normal day light hours. No permanent lighting is proposed or would be required as part of the Lake Calavera Trails Project. However, it should be noted that as part of the non-related Lake Calavera Dam Improvements Project, permanent lighting Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 75 around the intake/outlet control building has been implemented per the Lake Calavera Dam Improvements Project - Addendum (M&A, Revised July 2006). The installation of the low-pressure sodium illumination security lighting was to be directed downward away from the preserve areas using appropriate placement as shields. Develop a Recreational Plan or Review Plans for Compliance Identify opportunities and constraints to future recreational use development and for monitoring existing recreational activities that are consistent with biological goals. Concentrate facilities in disturbed areas or lower quality habitats away from sensitive plant populations or sensitive breeding areas. Develop design standards for new trail construction that addresses the avoidance of sensitive species, unique habitats, erosion control, and developed access to major features. Establish a volunteer program to patrol the trails and monitor use of the preserve. Emphasize the use of “fire-safe” native plants in landscaping along preserve edges. Prohibit the use of invasive exotics, and adopt an exotic plant control plan. Require any recreational construction projects to control dust, noise, and erosion, and to adhere to seasonal and time-of-day restrictions. The sensitive biological resources associated with Lake Calavera are extensive and cannot be fully avoided; however, the Lake Calavera Trails project has been designed to avoid impacts to the greatest extent feasible while still meeting the project goals of formal trail implementation and regulation around the lake. Volunteers, as directed by the City Parks and Recreation Departments, would assist in construction of the trails and trail maintenance. Volunteers would be required to follow the Handbook for Citywide Trail Volunteers (City 2003, currently being updated), which covers the following: safety of the volunteer and general public; administrative responsibilities; limitations on tasks a volunteer can perform; and Volunteer Standards and Ethics. It also covers the City’s responsibilities to a volunteer and includes copies of the forms (maintenance report/timesheets, volunteer agreement, etc.) that volunteers are needed to complete periodically. No non-native plants are proposed to be planted as part of this project. As stated within the Mitigation and Monitoring Requirements section of this report, construction BMP’s would be implanted according to Appendix B of the Final MHCP Subarea Plan, Volume II. Specific Recreational Activities Passive Uses Limit or restrict passive uses in critical wildlife areas during the breeding season, as determined appropriate. No seasonal closure of trails, which encroach on lands utilized by the coastal California gnatcatcher are proposed at this time; however, trail/amenity construction and maintenance restrictions would be implemented as stated within the Mitigation and Monitoring section of this report. Gnatcatcher populations and locations are known to fluctuate and move; thus, future seasonal/temporary closure of trails would be at the discretion of the City Parks and Recreation Department and/or Land Manager. Please refer to the above paragraphs (i.e., the second bullet under “Follow Guidelines for Future Recreational Expansion”starting on page 69) for specific details. Minimize adverse effects of passive recreation, such as trampling of vegetation and erosion. Trails to be permanently closed would be done so with a wood pole barrier fencing at trail junctions and would be identified as a closed trail by all weather, “Trail Closed” signs that indicate who should be contacted with regard to any questions or concerns about the site (Figure 3b). In addition, the Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 76 proposed project includes installation of wood pole barrier fencing where needed such as at trail junctions and along additional barrier fencing may occur in the future if determined necessary as a result of trail widening and/or disturbance to biological resources adjacent to the trail. Please refer to the above bullets under “Follow Guidelines for Future Recreational Expansion” for specific details. Provide litter control measures, such as closed garbage cans and recycling bins at access points for the preserve. The project proposes to install litter receptacle/dog waste stations as identified within Figure 3a. Day Use Site picnic areas or other day use facilities at the edges of the preserve lands or in buffer zones. Only 2 picnic tables are proposed for the project site. One is proposed to occur on the north side of the lake within the Type A trail limits. Due to its location on the trail, it could be easily accessed via a maintenance vehicle. The other picnic table is proposed to be located south of the lake within a Type B trail. Due to the size of the picnic table pad, minor impacts to the adjacent grassland (beyond those from the proposed trail) would be incurred. Due to its location, access to this picnic table would occur by volunteers on foot. Collect garbage frequently and instruct day users not to feed wildlife. Maintenance of the Lake Calavera site would be under the direction of the City Parks and Recreation Department and/or Land Manager and would follow the Citywide Trail Maintenance Plan (City 2002, page 4). Per the adopted maintenance plan, estimated frequency of trash pick-up would be 2 times per week. Regulations for trail use would be posted within the informational kiosks throughout the site. Trail signage use and installation would follow the City’s Trail Signage Guidelines and Standards (2003). Mountain Biking Limit mountain bike trails to areas not highly susceptible to erosion and out of wetlands and other sensitive areas. Construct trails wider than foot trails (minimum 6 feet) to prevent trail edge disturbance and on grades no greater than 25 percent. Rotate bike use by closing trails periodically to prevent trail degradation if a problem develops. Construct barriers to restrict access to sensitive areas. Per the proposed trail system, bicyclists would be limited to Type A (10 to 12 feet wide) and Type B – Hikers/Bicyclists (4 to 8 feet wide) trails only. Bicyclists are excluded from wetland areas excluding the 3 segments of trails that are proposed to have year around boardwalks. Bicyclists are excluded from trails that have a slope greater than 25 percent. If determined necessary (ex. erosion, trail widening, or user conflict), the City Parks and Recreation Department and/or Land Manager would temporarily close trails using wood pole barrier fencing until deemed suitable for use. In addition, wood pole barrier fencing is proposed to prevent access and/or ensure that users stay on designated trails. Public Access Seasonally restrict access to certain trails if deemed necessary to prevent disturbance of breeding activities. No seasonal closure of trails, which encroach on lands utilized by the coastal California gnatcatcher and/or any other migratory bird are proposed at this time; however, trail/amenity construction and Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 77 maintenance restrictions would be implemented as stated within the Mitigation and Monitoring section of this report. Gnatcatcher populations and locations (as well as other migratory bird populations) are known to fluctuate and move; thus, future seasonal/temporary closure of trails would be at the discretion of the City Parks and Recreation Department and/or Land Manager. Close unnecessary trails to minimize biological impacts. Abandon and revegetate steep eroding trails. The proposed project has eliminated the majority of the non-official trail system. Trails to be permanently closed would be done so with a wood pole barrier fencing at trail junctions and would be identified as a closed trail by all weather, “Trail Closed” signs that indicate who should be contacted with regard to any questions or concerns about the site. In addition, wood pole barrier fencing has been proposed at trail junctions and/or where needed to ensure users stay within the designated trail. Additional wood pole barrier fencing beyond what is identified within this report would be at the discretion of the City Parks and Recreation Department and/or Land Manager. Repair and revegetation of steep and eroding trails, which are proposed to be closed, would be the responsibility of the City Parks and Recreation Departments. Locate new trails away from sensitive resources or restrict their use. The sensitive biological resources associated with Lake Calavera are extensive and cannot be fully avoided; however, the Lake Calavera Trails project has been designed to avoid impacts to the greatest extent feasible while still meeting the project goals of formal trail implementation and regulation around the lake. Construct trails to any prominent features or viewpoints that are likely to attract hikers, thereby preventing extensive trampling and compaction. It should be noted that a field meeting took place in September 2006 with M&A biologist Amanda Gonzales, and USFWS, CDFG, and City staff. The purpose of the meeting was to walk the proposed trail system and demonstrate the analysis used for determining trail improvements to existing trails and criteria used for closing many existing trails. While on-site, it was observed that the proposed trail system had captured the existing highly utilized trails while proposing to close trails that had 1) avoidable impacts to sensitive biological resources, 2) redundant trail use, and 3) large amounts of erosion. Install waterbrakes on steep trails to prevent accelerated runoff and erosion. The proposed trails have been limited to areas that consist of less than 25 percent slope, excluding the northeastern trail/street connection at Lake Boulevard. This trail is currently utilized by hikers and bicyclists; however, upon implementation of the proposed project, it would serve as a Type C trail. Although there is little erosion at this connection, the trail is at a very steep incline; thus, the City would install a wood timber stair (approximate 6 feet wide staircase). It is expected that waterbars would be installed along the Type A trail located along the eastern boundary of the site as well as the 2 north-south directional Type B trails within the south-central portion of the site. All other trails that are exposed to high erosion occurrences and which are located on a slope greater than 25 percent would be closed to the public using wood pole barrier fencing and would be indicated as a closed trail by all weather, “Trail Closed” signs. Establish patrols to identify trail maintenance needs, garbage, vandalism, and habitat degradation. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 78 Maintenance of the Lake Calavera site would be under the direction of the City Parks and Recreation Department and/or Land Manager and follow Citywide Trail Maintenance Plan (City 2002, page 4). Volunteers are expected to perform most of the work, under the direction of the City Parks and Recreation Department. Volunteers would be required to follow the Handbook for Citywide Trail Volunteers (City 2003, currently being updated), which covers the following: safety of the volunteer and general public; administrative responsibilities; limitations on tasks a volunteer can perform; and Volunteer Standards and Ethics. It also covers the City’s responsibilities to a volunteer and includes copies of the forms (maintenance report/timesheets, volunteer agreement, etc.) that volunteers are needed to complete periodically. In addition, volunteers are required to receive trail maintenance training at Trail School or at the San Diego County training program. The training follows National Park Service standards for trail maintenance and construction. Hydrology and Flood Control The Lake Calavera Trails project would not alter or impede the flows of Calavera Creek or the unnamed drainage feeding into the creek. All but 3 segments of the trail system would be located outside of the creek boundaries. Thus, where designated, boardwalks would be installed to allow year-around access (at the 3 segments) for trail users within areas of seasonal inundation and/or saturation. As part of the boardwalk, a wood curb would be installed along the edge of the boardwalk to prevent users from stepping off the designated path. The boardwalks would be constructed in accordance with the National Park Service standards to accommodate floods and debris flows (Figure 3c). It should be noted that the project site is not located within a floodplain; rather the nearest floodplain is located within Buena Vista Creek approximately 2,600 feet to the north of the site (FEMA 1997). Any required maintenance would occur per the Citywide Trail Maintenance Plan (City 2002) under the direction of the City Parks and Recreation Department and/or Land Manager. No mineral extraction is proposed to occur as part of the proposed project. Please refer to the above paragraphs for details of wetland impacts and the proposed boardwalks. As stated within the Mitigation and Monitoring Requirements section of this report, construction BMP’s will be implanted according to Appendix B of the Final MHCP Subarea Plan, Volume II. Species Introduction No sensitive flora or fauna species are proposed to be relocated as a part of the proposed project. Enforcement Enforcement of trail use regulations is the responsibility of the City police. Trail maintenance and management of preserved/natural lands is the responsibility of the City Parks and Recreation Departments and Land Manager, respectively. Due to the overlapping duties, both entities would work together to manage the project site. As stated above, the sensitive biological resources associated with Lake Calavera are extensive and cannot be fully avoided; thus, impacts to sensitive biological resources are significant per the City’s HMP and would require that project mitigation measures be implemented to reduce impacts to a level below significance. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 79 Adaptive Management Monitoring of covered species is not within the scope of the Lake Calavera Trails project. Impacts to sensitive species as a result of the project is significant per the City’s HMP and would require that project mitigation measures be implemented to reduce impacts to a level below significance. Monitoring Habitat mitigation would be required as a result of the proposed project. Please refer to the Mitigation and Monitoring Requirements section of this report for further details. HMP – Section F3 Adjacency Standards A small portion of native habitat is located outside of the preserve system (previous Figure 2b); thus, adjacency standards have been addressed. Fire Management All trail maintenance would follow the Citywide Trail Maintenance Plan (City 2002) under the direction of the City Parks and Recreation Departments and/or Land Manager. All fire management activities are under the direction of the City Fire Marshall. The only firebreak/buffer enforced around Lake Calavera is located along the northern boundary of the site (between the City of Carlsbad and Oceanside) and is disced/graded yearly (Figure 9). The eastern portion of the site is bound by residential development that requires fire safe plants (in place) and consists of a working irrigation system. Erosion Control The proposed trails have been limited to areas that consist of less than 25 percent slope, excluding the eastern most trail/street connection at Lake Boulevard. This trail is currently utilized by hikers and bicyclists; however, upon implementation of the proposed project, it would serve as a Type C – Hikers only trail. Trails which are exposed to high erosion occurrences would be closed to the public using wood pole barrier fencing and would be indicated as a closed trail by all weather, “Trail Closed” signs. Landscape Restrictions No non-native plants would be planted as part of the Lake Calavera Trails project. Please refer to the Mitigation and Monitoring Requirements section of this report as well as the On-site Revegetation Recommendations section of this report for further details. Fencing, Signs, and Lighting The only fencing proposed for the project is wood pole barrier fencing (Figure 3b). Other proposed trail amenities include: 1) information kiosks, 2) view point/interpretative signage, 3) trail markers, 4) trail regulation sign, 5) litter receptacle/dog waste stations, 5) picnic table, and 6) portable restroom. Installation and signage use would follow the City’s Trail Signage Guidelines and Standards (2003). In addition, all proposed trail amenities would be placed within existing trails and Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 80 not require the removal/trampling of habitat. All construction work would occur during normal day light hours; thus, no lighting is proposed or would be required. Predator and Exotic Species Control Removal of exotic flora species would occur in coordination with habitat-based mitigation as part of the project. Feral and domestic animal control is the responsibly of the Lake Calavera Trails Mitigation Bank Land Manager and thus is not within the scope of this project. It should be noted that the invasive non-native brown-headed cowbird was detected within the eastern portion of the study area; however, monitoring and removal of this species is not within the scope of this project. CUMULATIVE IMPACTS CEQA guidelines §15355 define cumulative impacts as “two or more individual effects which, when considered together, are considerable or which compound or increase other environmental impacts.” The MHCP was designed to compensate for the loss of biological resources throughout the program’s region; therefore, projects that conform to the MHCP, as specified by the City’s HMP, would not result in a cumulatively considerable impact for those biological resources adequately covered by the program. The aforementioned direct and indirect impacts resulting from the proposed maintenance project should not be cumulatively considerable if the project mitigation measures are implemented to ensure conformance to the MHCP and the City’s HMP. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 81 MITIGATION AND MONITORING REQUIREMENTS MITIGATION ELEMENT The mitigation ratios for impacts to vegetation types resulting from the proposed trail system are provided in Table 11 of the City’s HMP (Adopted 2004). In addition, per Section D (Page D-14) of the HMP, all impacts resulting from City projects must be mitigated at the Lake Calavera Mitigation Bank on an acre-for-acre basis regardless of the type of habitat being impacted excluding impacts to wetlands and gnatcatcher occupied sage scrub. These ratios may be subject to modification by state and federal resource agencies, for areas under their jurisdiction, as the project proceeds and permit applications are processed. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 82 MITIGATION REQUIREMENTS • Table 13 describes the appropriate mitigation ratios and required mitigation acreages1 Table 13. Mitigation Ratios for Impacted Vegetation Communities and Jurisdictional Habitats Mitigation Ratio Total Impacts (Acreage) Mitigation (Acreage) Vegetation Community HMP Habitat Group2 P T PI TI Total P T Total Disturbed Wetland Group A 2:1 1:1 0.002 --- 0.003 0.004 --- 0.004 Coastal and Valley Freshwater Marsh Group A 2:1 1:1 0.05 0.05 0.10 0.10 0.05 0.15 Southern Coast Live Oak Riparian Forest Group A 3:1 1:1 0.05 0.04 0.09 0.15 0.04 0.19 Mule Fat Scrub Group A 2:1 --- 0.001 --- 0.001 0.002 --- 0.002 Southern Willow Scrub Group A 3:1 1:1 0.02 0.02 0.04 0.06 0.02 0.08 Non-Wetland Waters of the U.S./Streambed (Drainages) Group A 1.5:1 --- 0.001 --- 0.001 0.002 --- 0.002 Total Wetland3: 0.12 0.11 0.23 0.32 0.11 0.43 Disturbed Valley Needlegrass Grassland Group B 3:1 --- 0.02 --- 0.02 0.06 --- 0.06 Diegan Coastal Sage Scrub Group C 2:1 2:1 0.11 0.02 0.13 0.22 0.04 0.26 Southern Mixed Chaparral Group D 1:1 --- 0.05 --- 0.05 0.05 --- 0.05 Chamise Chaparral Group D 1:1 --- 0.02 --- 0.02 0.02 --- 0.02 Non-native Grassland Group E 0.5:1 --- 0.22 --- 0.22 0.11 --- 0.11 Disturbed Habitat Group F 0.1:1 --- 4.93 0.01 4.94 0.49 --- 0.49 Total Upland: 5.35 0.03 5.38 0.95 0.04 0.99 GRAND TOTAL: 5.47 0.14 5.61 1.27 0.15 1.42 1 P=Permanent, T=Temporary; PI= Permanent Impact, TI=Temporary Impact. 2 Group A habitats are associated with wetlands. Group C habitats are occupied by coastal California gnatcatcher. 3 Impacts to wetland habitats are subject to review under Section 404 of the federal Clean Water Act or under Section 1602 of the California Fish and Game Code. Mitigation ratio varies by type of habitat and subject to change. Mitigation for permanent impacts to wetland communities would require a minimum of 1:1 creation; the remaining mitigation could occur in the form of enhancement. It is recommend that mitigation for temporary impacts occur in the form enhancement and occur in place of the temporary impact. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 83 Impacts to jurisdictional wetlands and non-wetland waters of the U.S./streambed shall require the following permits by regulatory federal and state agencies: 1) ACOE, CWA, Section 404 permit for placement of dredged or fill material within waters of the U.S., 2) RWQCB, CWA, Section 401 state water quality certification/waiver for an action that may result in degradation of waters of the State, and 3) CDFG, California Fish and Game Code, Section 1602 agreement for alteration of a streambed. The mitigation must occur in the form of creation or creation combined with enhancement; however, the mitigation cannot result in a net-loss of wetland habitat or wetland functions and values. Therefore, a minimum 1:1 creation ratio must be applied toward any jurisdictional impacts. The development of a conceptual mitigation, maintenance, and monitoring plan will be required for the wetland mitigation. This plan is a requirement of both the federal and state wetland permit applications and must be submitted with the required permit applications. This plan should include details regarding grading, irrigation design, and planting specifications, as well as maintenance and monitoring procedures. The plan should also outline yearly success criteria and remedial measures should the mitigation effort fall short of the success criteria. Any wetland mitigation that cannot be achieved through on-site restoration and enhancement should be performed off-site, but preferably within the same local watershed; however, off-site mitigation may require higher mitigation ratios. Alternatively, the mitigation obligations may also be satisfied by participating in a fee-based mitigation program through a wetland mitigation bank. The proposed mitigation is subject to the resource agencies’ review and discretion; thus, the mitigation obligations for the impacts to jurisdictional wetland habitats may change from what has been recommended here. Until a conceptual plan is submitted for permitting, please refer to the On-site Revegetation Recommendations section of this report for a tentative map of suitable areas for wetland mitigation as well as appropriate planting material. The City plans to mitigate for impacts to gnatcatcher occupied sage scrub on-site. A conceptual mitigation plan for impacts to occupied coastal California gnatcatcher habitat will be submitted for permitting; however, until a plan is submitted, please refer to the On-site Revegetation Recommendations section of this report for a tentative map of suitable areas for sage scrub mitigation as well as appropriate planting material. The mitigation would consist of at minimum at 1:1 creation ratio within the immediate vicinity of occupied coastal California gnatcatcher habitat, with the goal of creating coastal sage scrub suitable for use the gnatcatcher. This mitigation plan should include details regarding grading, irrigation design, and planting specifications, as well as maintenance and monitoring procedures. The plan should also outline yearly success criteria and remedial measures should the mitigation effort fall short of the success criteria. The City plans to allocate conservation within Lake Calavera preserved lands as a suitable means of mitigating the remaining upland habitats. Per Appendix B of the HMP, the Lake Calavera project is a City project eligible to use City mitigation lands within the Lake Calavera Mitigation Bank. The process of establishment and management of the Lake Calavera lands as a formal mitigation bank is currently in process; until the final banking instruments are developed, the City shall maintain a ledger of preserve lands used for mitigation purposes. Construction of the project shall require permits from the City including a habitat management plan permit for any native habitat directly or indirectly affected by the project. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 84 Project construction, operations, use, and maintenance shall comply with the HMP Section F, Preserve Management, and specifically the Recreation and Public Access guidelines contained therein on pages F-11 through F-14. Construction BMP’s would be implemented according to Appendix B of the Final MHCP Subarea Plan, Volume II. A qualified biologist should inspect all construction fencing prior to construction and should monitor construction (grading) activities to avoid unauthorized impacts. Prior to construction activities, all wetland areas within or adjacent to construction areas should be encompassed by orange environmental fencing to protect them from construction as determined appropriate by the biological monitor and the Land Manager. Silt fencing or other sediment trapping devices should be installed and maintained in order to prevent runoff from entering the water systems during construction activities. Erosion control should be adequate to ensure that areas disturbed by the project remain stable and do not erode during rain events. Spoil, trash, or any debris should be removed off-site to an approved disposal facility. All construction area limits should be clearly delineated prior to construction activity with orange construction fencing or silt fencing to ensure that construction activity remains within the defined construction limits. Fencing shall not interfere with wildlife movement. The project biologist should provide direction to construction personnel regarding the need to avoid impacts to adjacent sensitive areas. All construction/grading plans should be made available to crews in the field showing these conditions. Per the City’s HMP, no clearing or non-routine maintenance of occupied coastal California gnatcatcher habitat shall occur within the breeding season, between March 1 and August 15. If this schedule cannot be met, it is recommended that a qualified biologist inspect the shrubs for nests prior to construction or non-routine maintenance. Trail maintenance activities are listed within Table 1, page 4 of the Citywide Trail Maintenance Plan (City 2002). Non-routine maintenance work would be classified as activities that require the use of the following: heavy equipment, equipment that produces noise greater than 60 decibels, equipment that produces a large amount of dust, trail closure, and removal of trees. If an active nest is found, no impacts shall be allowed within 500 feet until all young have fledged. Construction and non-routine maintenance work should be conducted outside of the raptor and migratory bird breeding season (typically February 15 – September 15). Trail maintenance activities are listed within Table 1, page 4 of the Citywide Trail Maintenance Plan (City 2002). Non-routine maintenance work would be classified as activities that require the use of the following: heavy equipment, equipment that produces noise greater than 60 decibels, equipment that produces a large amount of dust, trail closure, and removal of trees. If this schedule cannot be met, it is recommended that a qualified biologist inspect the trees for nests prior to Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 85 construction or non-routine maintenance. If an active nest is found, no impacts shall be allowed within 500 for all listed species and 300 feet for non-listed species until all young have fledged. Maintenance of the Lake Calavera Trails project will comply with the Citywide Trail Maintenance Plan (City 2002). Trails shall be maintained on a regular basis, particularly in the rainy season, to prevent soil erosion and sedimentation from entering the adjacent wetlands and affecting water quality. Waterbars should be installed on steep trails to prevent accelerated runoff and erosion. Please refer to previous Table 1 for the approximate location of these structures. Construct barrier fencing to restrict human access along trails within sensitive areas, while still allowing for wildlife movement. Construct barrier fencing to restrict access to trails that have been closed. PROTECTION AND NOTICE ELEMENT Assurance that the mitigation areas will be adequately protected from future development occurred with the approval of the HMP in 2004, which designated the Lake Calavera site as open space (Adopted 2004, Section D, page D-14). In addition, per Appendix B of the HMP, the Lake Calavera project is a City project eligible to use City mitigation lands within the Lake Calavera Mitigation Bank. Establishment and management of a formal mitigation bank is currently in process, until final establishment, the City shall maintain a ledger of Lake Calavera lands used for projects. The implementation of the proposed project would permanently close the majority of the existing trail system by placing wood pole barrier fencing where designated (Figure 3a). However, repair and revegetation of eroded trails that are proposed to be closed would be the responsibility of the City Parks and Recreation Departments. Any repair and revegetation (beyond the required above mitigation measures) would not serve as project mitigation; rather, it would be performed by the City to ensure continued growth of native species within the Lake Calavera site. Please refer to the On- site Revegetation Recommendations section of this report for a map of existing trails that are to be closed and appropriate planting material that should be utilized; the City Parks and Recreation Departments must adhere to the program for avoidance of planting non-native species. MANAGEMENT ELEMENT The Mitigation Program, as provided through the City’s HMP Lake Calavera Mitigation Bank shall provide assurance that the mitigation area will be adequately managed and monitored consistent with the Preserve Management section of the City’s HMP. Implementation of the aforementioned mitigation measures should reduce biological impacts to a level below significance and ensure conformance with the City’s HMP and MHCP Subarea Plan. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 86 ADDITIONAL RECOMMENDATIONS GRID GUIDE TO AREAS ON-SITE As requested by the City, a user-friendly map has been prepared to allow the public, maintenance crew members, volunteers, and first emergency responders to easily locate areas on the map using a grid system (Figure 8). M&A #04-101-06 Merkel & Associates, Inc. Lake Calavera Trails Grid Guide to Areas On-site Figure 8 N EW S $T $T $T $T $T $T $T $T $T $T $T$T $T $T $T $T $T $T $T $T $T$T $T #³ $T$T $T$T$T $T $T $T $T $T I6 I5 I3 I4 I1 I2 J1 J3 J2 J5 J6 J4 F6 F5 F3 F2 F1 F4 B6 E6A6 B5 B3 E5 B2 E1 E3 E2 B1 E4B4 A5 A3 A2 A1 A4 C6 D6 C3 H6 C2 C5 C1 H5 D1 H3D3 D2 H1 D5 H2 H4C4D4 G6 G5 G3 G1 G2 G4 SkyHavenLn. Lake Blvd. T a m a r a ck A v e. # Carlsbad Municipal Water District Easement Road # SDG&E Easement Road City of Oceanside Trail # Carlsbad Municipal Water District Easement Road # SDG&E Easement Road # CDFG Owned Trails # CDFG Owned Trails # HOA Trail A1 Locator Grid Study Area Other 200 0 200 400 600 Feet Barrier Fencing Official Offsite Trail System Boardwalk Type C (Hikers only 2-6 feet wide) Portable Restroom$T $T Proposed Trails Type B (Hikers/Bicyclists 4-8 feet wide) View Point/Interpretive Signage Picnic Table$T $T Access Point Connection to City Wide Trails Information Kiosk$T $T Litter Receptacle / Dog Waste Station $T Access Point Connection to Other Trail Systems Access Point Connection to Street/Sidewalk $T Proposed Trail Amenities Type A (Hikers/Bicyclists 10-12 feet wide) Existing Water District/SDG&E Rd. 2008 Aerial Image from City of Carlsbad #³Wood Timber Stair SDG&E Right-of-Way Oak Riparian Park # Calavera Hills Trail Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 88 ON SITE REVEGETATION RECOMMENDATIONS As requested by the City, M&A has 1) identified suitable areas for habitat mitigation, 2) identified existing trails that are proposed to be closed, and 3) recommend appropriate plant materials for habitat mitigation and trail revegetation (Tables 14 through 21; Figure 9). This section of the report identifies tentative areas and appropriate planting materials for habitat mitigation and trail revegetation; however, it is not intended to serve as a mitigation plan. Seed Mixes/Container Plants The following species are to be utilized in the restoration effort. Table 14.Coastal Valley Freshwater Marsh Plant Materials Species Common Name Unit Size Approximate Density Artemisia palmeri San Diego sagewort 1-gallon 3-foot centers Baccharis salicifolia mule fat 1-gallon 7-foot centers Iva hayesiana San Diego marsh elder rose pots 3-foot centers Juncus acutus ssp. leopoldii spiny rush 1-gallon 3-foot centers Table 15.Coastal Valley Freshwater Marsh Hydro-seed Species Species Common Name Density Purity/Germination Anemopsis californica yerba mansa 4 lbs./acre 50/70 Artemisia douglasiana mugwort 3 lbs./acre 15/50 Artemisia palmeri San Diego sagewort 3 lbs./acre 15/50 Baccharis salicifolia mule fat 1 lb./acre 10/20 Iva hayesiana San Diego marsh elder 5 lbs./acre 35/20 Juncus acutus ssp. leopoldii spiny rush 2 lbs./acre 90/80 Scirpus californicus California bulrush 2 lbs./acre 90/60 Typha latifolia broad-leaved cattail 4 lbs./acre 80/50 Table 16.Southern Coast Live Oak Riparian Forest Plant Materials Species Common Name Unit Size Approximate Density Artemisia palmeri San Diego sagewort 1-gallon 3-foot centers Baccharis salicifolia mule fat 1-gallon 7-foot centers Heteromeles arbutifolia toyon 1-gallon 20-foot centers Iva hayesiana San Diego marsh elder rose pots 3-foot centers Juncus acutus ssp. leopoldii spiny rush 1-gallon 3-foot centers Platanus racemosa western sycamore 5-gallon 40-foot centers Populus fremontii Fremont cottonwood 5-gallon 15-foot centers Quercus agrifolia coast live oak 5-gallon 50-foot centers Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 89 Species Common Name Unit Size Approximate Density Ribes speciosum fuschia-flowered gooseberry 1-gallon 3-foot centers Rosa californica California rose 1-gallon 3-foot centers Salix gooddingii Goodding's black willow 1-gallon 15-foot centers Salix lasiolepis arroyo willow 1-gallon 10-foot centers Table 17.Southern Willow Scrub Plant Materials Species Common Name Unit Size Approximate Density Artemisia palmeri San Diego sagewort 1-gallon 3-foot centers Baccharis salicifolia mule fat 1-gallon 7-foot centers Iva haysiana San Diego marsh elder rose pots 3-foot centers Juncus acutus L. ssp. leopoldii spiny rush 1-gallon 3-foot centers Rosa californica California rose 1-gallon 3-foot centers Salix exigua narrow-leaved willow cuttings 10-foot centers Salix gooddingii Goodding's black willow cuttings 15-foot centers Salix lasiolepis arroyo willow cuttings 10-foot centers Toxicodendron diversilobum western poison oak 1-gallon 3-foot centers Table 18.Native Grassland Plant Materials Species Common Name Unit Size Approximate Density Leymus triticoides beardless wild ryegrass 1-gallon 10-foot centers Lotus scoparius var. scoparius coastal deerweed 1-gallon 10-foot centers Nassella lepida foothill needlegrass cones 5-foot centers Nassella pulchra purple needlegrass cones 5-foot centers Artemisia californica California sagebrush 1-gallon 20-foot centers Eriogonum fasiculatum var.foliolosum interior flat-top buckwheat 1-gallon 20-foot centers Table 19.Native Grassland Hydro-seed Species Species Common Name Density Purity/Germination Castilleja exserta ssp. exserta purple owl's-clover 1 lb./acre 50/50 Deinandra fasciculata fascicled tarplant 4 lbs./acre 20/80 Eriophyllum confertiflorum var. confertiflorum golden-yarrow 3 lbs./acre 30/70 Lotus scoparius var. coastal deerweed 6 lbs./acre 95/80 Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 90 Species Common Name Density Purity/Germination scoparius Nassella lepida foothill needlegrass 6 lbs./acre 90/60 Nassella pulchra purple needlegrass 8 lbs./acre 90/80 Sisyrinchium bellum blue-eyed grass 4 lbs./acre 95/75 Trifolium albopurpureum rancheria clover 2 lbs./acre 90/60 Table 20.Diegan Coastal Sage Scrub Plant Materials Species Common Name Unit Size Approximate Density Artemisia californica California sagebrush 1-gallon 20-foot centers Eriogonum fasiculatum var.foliolosum interior flat-top buckwheat 1-gallon 20-foot centers Malosma laurina laurel sumac 1-gallon 30-foot centers Mimulus aurantiacus coast monkeyflower 1-gallon 20-foot centers Nassella pulchra purple needlegrass cones 30-foot centers Opuntia littoralis coast prickly-pear 1-gallon 20-foot centers Rhamnus crocea spiny redberry 1-gallon 30-foot centers Rhus integrifolia lemonadeberry 1-gallon 30-foot centers Salvia apiana white sage 1-gallon 30-foot centers Sambucas mexicana blue elderberry 1-gallon 40-foot centers Table 21.Diegan Coastal Sage Scrub Hydro-seed Species Species Common Name Density Purity/Germination Artemisia californica California sagebrush 2 lbs./acre 15/50 Encelia californica California encelia 4 lbs./acre 40/60 Eriogonum fasiculatum var.foliolosum interior flat-top buckwheat 8 lbs./acre 50/20 Eschscholzia californica California poppy 0.25 lbs./acre 98/75 Lotus scoparius var. scoparius coastal deerweed 6 lbs./acre 95/80 Lupinus succulentus arroyo lupine 6 lbs./acre 98/85 Malosma laurina laurel sumac 2 lbs./acre 98/70 Nassella lepida foothill needlegrass 6 lbs./acre 90/60 Nassella pulchra purple needlegrass 8 lbs./acre 90/80 Rhus interifolia lemonadeberry 2 lbs./acre 90/70 Salvia mellifera black sage 3 lbs./acre 70/50 Sisyrinchium bellum blue-eyed grass 4 lbs./acre 95/75 --- , Cl Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 92 LITERATURE CITED AMEC Earth & Environmental, Inc. and Conservation Biology Institute. 2003a March. Volume I, Final MHCP Plan. Administered by SANDAG for the Cities of Carlsbad, Encinitas, Escondido, Oceanside, San Marcos, Solana Beach, and Vista. Prepared for the Multiple Habitat Conservation Program. 9 Sections + appendices. AMEC Earth & Environmental, Inc. and Conservation Biology Institute. 2003b March. Volume II, Final MHCP Plan, Biological Analysis and Permitting Conditions. Administered by SANDAG for the Cities of Carlsbad, Encinitas, Escondido, Oceanside, San Marcos, Solana Beach, and Vista. Prepared for the Multiple Habitat Conservation Program. 5 Sections + appendices. American Ornithologists’ Union. 2004. Forty-fifth Supplement to the American Ornithologists’ Union Check-list of North American Birds. Auk 121(3): 985-995. American Ornithologists’ Union. 1998. Check-list of North American Birds. 7th edition. American Ornithologists’ Union. Washington D.C. Baldwin, B.G., S. Boyd, B.J. Ertter, R.W. Patterson, T.J. Rosatti, and D.H. Wilken. 2004. Jepson Interchange List of Currently Accepted Names of Native and Naturalized Plants of California. Jepson Flora Project, Jepson Online Interchange. Regents of the University of California <http://ucjeps.berkeley.edu/interchange/I_status_1+2.html>. Accessed November 2004. Bowman, R. H., R. E. Bishop, R. W. Griffin, and M. L. Jones. 1973. Soil survey, San Diego area, California. U.S. Department of Agriculture. California Department of Fish and Game. 2005. Natural Diversity Database: Special Vascular Plants, Bryophytes, and Lichens List. 88 pp. <http://www.dfg.ca.gov/whdab/pdfs/spplant.pdf>. Accessed May 2005. California Department of Fish and Game. 2004. Natural Diversity Database: Special Animals. 48 pp. <http://www.dfg.ca.gov/whdab/pdfs/spanimals.pdf>. Accessed November 2004. California Department of Fish and Game, Natural Diversity Database. 2003. RareFind Version 3.0.3. 2004 data. California Native Plant Society (CNPS). 2001. Inventory of rare and endangered plants of California. Sixth edition. Rare Plant Scientific Advisory Committee. David P. Tibor, convening editor. Sacramento, California. X+388 pp. CGvL. 2001. Lake Calavera Improvements: Conceptual Planning and Preliminary Design Report. Cathcart, Garcia, and von Langen Engineers and Powell/PBS&J. City of Carlsbad. Phone conversation in December 2008. Between City of Carlsbad Park Planner, Liz Ketabian and Amanda Gonzales of Merkel & Associates, Inc. providing information about the status of the Lake Calavera Dam Improvements Project. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 93 City of Carlsbad. Phone conversation in January 2008. Between City of Carlsbad Park Planner, Liz Ketabian and Amanda Gonzales of Merkel & Associates, Inc. providing information about the firebreak implemented by the City Fire Marshall along the northern boundary of the project site between the Cities of Carlsbad and Oceanside. City of Carlsbad. Draft 1999, Adopted 2004. Habitat Management Plan for Natural Communities in the City of Carlsbad. City of Carlsbad. 2003. Trail Signage Guidelines & Standards, City of Carlsbad. City of Carlsbad. 2003. Handbook for Citywide Trail Volunteers, City of Carlsbad Recreation Department. City of Carlsbad. 2002. Citywide Trail Maintenance Plan, City of Carlsbad. City of Carlsbad. Implemented 2002. City of Carlsbad Jurisdictional Urban Runoff Management Plan. http://www.carlsbadca.gov/stormwater/jurmp.html Crother, B. I. (ed.). 2001. Scientific and Standard English Names of Amphibians and Reptiles of North America North of Mexico, with Comments Regarding Confidence in Our Understanding. SSAR Herpetological Circular 29.iii +82 pp. Crother, B.I., J. Boundy, J. A. Campbell, K. De Quieroz, D. Frost, D. M. Green, R. Highton, J. B. Iverson, R. W. Mcdiarmid, P. A. Meylan, T. W. Reeder, M. E. Seidel, J. W. Sites Jr., S. G. Tilley, and D. B. Wake. 2003. Scientific and Standard English Names of Amphibians and Reptiles of North America North of Mexico: Update. Herpetological Review, 2003, 34(3), 196–203. Environmental Laboratory. 1987. Corps of Engineers wetlands delineation manual. Technical Report Y-87-1, US Army Engineer Waterways Experimental Station, Vicksburg, MS. 117 pp. Eriksen, C.H., and D. Belk. 1999. Fairy Shrimps of California’s Puddles, Pools, and Playas. Mad River Press, Eureka, CA Federal Emergency Management Agency. FEMA. June 19, 1997. Data obtained electronically from SanGIS. San Diego County, California and Incorporated Areas. Map Number 06073C0767 F. Hathaway, S.A. and M.A. Simovich. 1996. Factors affecting the distribution and co-occurrence of two southern Californian anostracans (Branchiopoda), Branchinecta sandiegonensis and Streptocephalus wootonii. Journal of Crustacean Biology 16(4): 669 - 677. Hickman, J. C., editor. 1993. The Jepson Manual, Higher Plants of California. University of California Press, Berkeley. 1400pp. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 94 Holland, R. F. 1986. Preliminary Descriptions of the Terrestrial Natural Communities of California. State of California, The Resources Agency, Department of Fish and Game. Sacramento, California. 156 pp. Merkel & Associates, Inc. July 2006. Biological Impact Analysis Report – Addendum for the Lake Calavera Dam Improvements Project located in the City of Carlsbad. 58 pp. + Appendices. Merkel & Associates, Inc. July 2005. 90-day Letter Report of Vernal Pool Branchiopod Wet Season Survey Sampling for the Lake Calavera Trails Project, Located in the City of Carlsbad, County of San Diego. Merkel & Associates, Inc. July 2005. 45-day Letter Report of Focused Least Bell’s Vireo and Southwestern Willow Flycatcher Surveys, Lake Calavera Trails Project, Located in the City of Carlsbad, San Diego County. 6pp. Merkel & Associates, Inc. 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June 2003. 45-day Letter Report of Focused Coastal California Gnatcatcher (Polioptila californica californica) Survey for the Lake Calavera Improvements Project Located in Carlsbad, County of San Diego, Conducted under Federal Endangered Species Act, Section 10(a)(1)(A) Permit #797999 and State of California Endangered Species Act Memorandum of Understanding. 15 pp. Merkel & Associates, Inc. July 2002. 45-day letter report of focused Least Bell's Vireo (Vireo bellii pusillus) survey for the Lake Calavera project site located in Carlsbad, County of San Diego, conducted under State of California Endangered Species Act Memorandum of Understanding. 12 pp. Munsell Color. 2000. Munsell® Soil Color Charts. Revised Edition. Munsell® Color/GretagMacBeth, New York. Oberbauer, T. 1996. Terrestrial Vegetation Communities in San Diego County Based on Holland’s Descriptions. San Diego Association of Governments. San Diego, California. 7 pp. Opler, P. A., and A. B. Wright. 1999. A Field Guide to Western Butterflies. Second Edition Houghton Mifflin Company. Boston and New York. 540 pp. Lake Calavera Trails – Biological Resources Report Revised January 28, 2009 Merkel & Associates, Inc. #04-101- 95 Planning Systems. April 2006. Draft 3 Wetland Habitat Restoration, Maintenance and Monitoring Program for the Calavera Dam Remediation Improvements Project. Carlsbad, California. 26 pp. Proctor, V. W., C. R. Malone, and V. L. DeVlaming. 1967. Dispersal of aquatic organisms: viability of disseminules recovered from the intestinal tract of captive killdeer. Ecology 48:672-676. Rebman JP, Simpson MG. 2006. Checklist of the Vascular Plants of San Diego County, 4th Edition [Internet]. ISBN 0-918969-05-0. Available from: http://www.sdnhm.org/research/botany/sdplants/index.html Rogers, T. H. 1966. Geologic map of California, Santa Ana Sheet (fifth printing 1985). 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Habitat Types: Dw = Disturbed Wetland O = Open Water A = Cismontane Alkali Marsh F = Coastal and Valley Freshwater Marsh R = Southern Coast Live Oak Riparian Forest M = Mule Fat Scrub W = Southern Willow Scrub L = Coast Live Oak Woodland V = Disturbed Valley Needlegrass Grassland D = Diegan Coastal Sage Scrub S = Coastal Sage-Chaparral Scrub Cm = Southern Mixed Chaparral Cc = Chamise Chaparral N = Non-native Grassland X = Disturbed Habitat E = Non-native Vegetation U = Urban/Developed Mo = Species found throughout majority of site * = Denotes non-native flora species. Lake Calavera Trails – Biological Resources Report Scientific Name Common Name Habitat Merkel & Associates, Inc. #04-101-01 A-1-2 CRYPTOGAMS Pentagramma triangularis (Kaulf.)Yats. ssp. viscosa (D.C. Eaton) Yats., Windham, & Wollenw. Yats silverback fern R Selaginellaceae - Spike-Moss Family Selaginella cinerascens A.A. Eat. ashy spike-moss D,Cm DICOTYLEDONS Aizoaceae – Fig-Marigold Family *Carpobrotus edulis (L.)N.E. Brit. hottentot-fig E Anacardiaceae - Sumac Family Malosma laurina (Nutt.)Abrams laurel sumac D,Cm Rhus integrifolia (Nutt.)Brewer & S. Watson lemonadeberry D *Schinus terebinthifolius Raddi Brazilian pepper tree E Toxicodendron diversilobum (Torrey & A. Gray)Greene western poison oak F,R,W,B Apiaceae - Carrot Family Apiastrum angustifolium Nutt. mock parsley N *Apium graveolens L. celery A,W *Conium maculatum L. common poison hemlock W *Foeniculum vulgare Mill. fennel X Lomatium lucidum (Torr. & Gray)Jeps. shiny lomatium D Sanicula arguta (Torrey & Gray)Coult. & Rose sharp-tooth sanicle V Sanicula crassicaulis DC. Pacific sanicle V Asteraceae - Sunflower Family Ambrosia psilostachya DC. western ragweed A,F,M,D,V,X Artemisia californica Less. California sagebrush D,S Baccharis pilularis DC. coyote brush F,Dw,D,B Baccharis salicifolia (R. & P.)Pers. mule fat F,M,W,D Baccharis sarothroides Gray broom baccharis D *Centaurea melitensis L. tocalote X,E *Chrysanthemum coronarium L. garland N,X *Cirsium vulgare (Savi)Ten. bull thistle W,X *Cotula coronopifolia L. brass-buttons N,X *Cynara cardunculus L. cardoon N,E,X Deinandra fasciculata Greene fascicled tarplant D,N,X Encelia californica Nutt. California encelia D Eriophyllum confertiflorum (DC.)Gray var. confertiflorum golden-yarrow D,Cm,N *Gazania sp. gazania E Gnaphalium bicolor Bioletti bicolor cudweed D Gnaphalium californicum DC. California everlasting D,N Gnaphalium canescens DC. ssp. beneolens (Davids.)Stebb. & Keil fragrant everlasting D Lake Calavera Trails – Biological Resources Report Scientific Name Common Name Habitat Merkel & Associates, Inc. #04-101-01 A-1-3 Gutierrezia sarothrae (Pursh)Britt. & Rusby matchweed D Hazardia squarrosa ssp. grindelioides (DC.)Clarke saw-toothed goldenbush D *Hedypnois cretica (L.)Willd. Crete hedypnois X,N Heterotheca grandiflora Nutt. telegraph weed D,X Isocoma menziesii (Hook. & Arn.)Nesom var. decumbens clay-field goldenbush D,N Isocoma menziesii (Hook. & Arn.)Nesom var. menziesii goldenbush D,S,V,N,X *Picris echioides L. bristly ox-tongue W,B Pluchea odorata Cav. salt marsh fleabane F,W Psilocarphus tenellus Nutt. slender woolly marbles X Rafinesquia californica Nutt. California chicory Cm *Silybum marianum (L.)Gaertn. milk-thistle N,X *Sonchus asper (L.)Hill prickly sow thistle N,X Stephanomeria diegensis Gottlieb San Diego wreath-plant X Xanthium strumarium L. cocklebur A,M,W Boraginaceae - Borage Family Amsinckia intermedia (Lehm.)Nelson & J.F. Macbr. fiddleneck D Cryptantha intermedia (Gray)Greene nievitas, cryptantha D,N Heliotropium curvassavicum L. salt heliotrope W Brassicaceae - Mustard Family *Brassica nigra (L.)Koch black mustard N,X *Hirschfeldia incana (L.)Lagr.-Fossat short-pod mustard N,X *Lobularia maritima (L.)Desv. sweet alyssum N,X *Rorippa nasturtium-officinale (L.)Hayek water cress F Cactaceae - Cactus Family *Opuntia ficus-indica (L.)Miller Indian-fig D Opuntia littoralis (Engelm.)Ckll. coast prickly-pear D,Cm Capparaceae - Caper Family Isomeris arborea Nutt. bladderpod D Caprifoliaceae - Honeysuckle Family Lonicera japonica Japanese honeysuckle E Lonicera subspicata var. denudata Rehd. San Diego honeysuckle F,R,D,S Sambucus mexicana DC. blue elderberry D Caryophyllaceae - Pink Family *Silene gallica L. common catchfly Cm,N Chenopodiaceae - Goosefoot Family Salicornia virginica L. pickleweed A *Salsola tragus L. Russian thistle X Cistaceae - Rock-Rose Family *Cistus sp. rock rose E Helianthemum scoparium Nutt. peak rush-rose D,Cm,N Lake Calavera Trails – Biological Resources Report Scientific Name Common Name Habitat Merkel & Associates, Inc. #04-101-01 A-1-4 Convolvulaceae - Morning-Glory Family Dichondra occidentalis House western dichondra D Crassulaceae - Stonecrop Family Dudleya pulverulenta (Nutt.)Britt. & Rose chalk-lettuce D Cucurbitaceae - Gourd Family Marah macrocarpus (Greene)Greene var. macrocarpus wild-cucumber D Dipsacaceae – Teasel Family Dipsacus sativus (L.) Honck. Fuller’s Teasel Dw,D Ericaceae - Heath Family Xylococcus bicolor Nutt. mission manzanita S,Cm Euphorbiaceae - Spurge Family Eremocarpus setigerus (Hook.)Benth. doveweed A,N *Ricinus communis L. castor-bean S Fabaceae - Pea Family *Acacia baileyana. Bailey acacia S,E Lathyrus splendens Kell. pride-of-California X Lathyrus vestitus Nutt. ssp. alefeldii (White)Isely San Diego sweetpea D Lotus scoparius (Nutt.)Ottley var. scoparius coastal deerweed D,Cm,Cc,V,N Lupinus bicolor Lindl. miniature lupine D,N,X *Medicago polymorpha L. California burclover N Trifolium albopurpureum T. & G. rancheria clover D,Cm,N Fagaceae - Oak Family Quercus agrifolia Neé coast live oak R,L Quercus berberidifolia Liebm. scrub oak Cm,Cc,L Geraniaceae - Geranium Family *Erodium botrys (Cav.)Bertol. long-beak filaree N,X *Erodium cicutarium (L.)L'Hér. Ex Aition red-stem filaree N Geranium carolinianum L. carolina geranium R,D Grossulariaceae - Currant Family Ribes indecorum Eastw. white flowering currant D Ribes speciosum Pursh fuchsia-flowered gooseberry D Hydrophyllaceae - Waterleaf Family Phacelia ramosissima Lehm. var. latifolia (Torr.)Cronquist caterpillar phacelia D Pholistoma auritum (Lindl.)Lilja fiesta flower R,D Lamiaceae - Mint Family Salvia apiana Jeps. white sage D,Cm Salvia mellifera Greene black sage D,Cm Lake Calavera Trails – Biological Resources Report Scientific Name Common Name Habitat Merkel & Associates, Inc. #04-101-01 A-1-5 Stachys ajugoides Benth. var. rigida (Nutt. ex Benth.) Jeps. & Hoover hedge nettle D Lythraceae - Loosestrife Family *Lythrum hyssopifolia L. grass poly N,X Malvaceae - Mallow Family Malacothamnus fasciculatus (Torr. & A. Gray)Greene mesa bush mallow, chaparral mallow D Sidalcea malviflora (DC.)Benth. ssp. sparsifolia C.L. Hitchc. checker-bloom R,V Myoporaceae - Myoporum Family *Myoporum laetum G. Forst. ngaio D,Cm Myrtaceae - Myrtle Family *Eucalyptus sideroxylon A. Cunn. ex Woolls red ironbark E *Eucalyptus sp. eucalyptus E Nyctaginaceae - Four-O'Clock Family Mirabilis laevis var.crassifolia wishbone bush D Onagraceae - Evening-Primrose Family Clarkia purpurea (Curtis) A. Nelson & J. F. Macbr. purple clarkia R Paeoniaceae - Peony Family Paeonia californica Torr. & A. Gray California peony R Plantaginaceae - Plantain Family Plantago erecta E. Morris dot-seed plantain D,N,Cm Polemoniaceae - Phlox Family Eriastrum sapphirinum (Eastw.)Mason ssp. sapphirinum sapphire woolly-star D,Cm,N,X Navarretia hamata Greene ssp. hamata hooked skunkweed D,Cm Polygonaceae - Buckwheat Family Chorizanthe fimbriata Nutt. var. fimbriata fringed spineflower Cc Chorizanthe procumbens Nutt. prostrate spineflower Cc Eriogonum fasciculatum Benth. var. foliolosum (Nutt.)S. Stokes interior flat-top buckwheat D,S *Rumex crispus L. curly dock A,D,N Portulacaceae - Purslane Family Claytonia perfoliata Willd. ssp. perfoliata common miner's-lettuce R,D,Cm Primulaceae - Primrose Family *Anagallis arvensis L. scarlet pimpernel W,D,N Dodecatheon clevelandii Greene ssp.clevelandii padre's shooting star V Lake Calavera Trails – Biological Resources Report Scientific Name Common Name Habitat Merkel & Associates, Inc. #04-101-01 A-1-6 Rhamnaceae - Buckthorn Family Adolphia californica S. Watson California Adolphia D,Cm,Cc Rhamnus crocea Nutt. spiny redberry D,Cm,Cc Rosaceae - Rose Family Adenostoma fasciculatum Hook & Arn. chamise D,S,Cm,Cc Heteromeles arbutifolia (Lindl.)M. Roem. toyon D,Cm,N Potentilla glandulosa Lindl. ssp. glandulosa sticky cinquefoil R Rosa californica Cham. & Schldl. California rose R,W Rubiaceae - Madder Family Galium angustifolium A. Gray ssp. angustifolium narrow-leaf bedstraw D Galium aparine L. goose grass D Galium nuttallii A. Gray ssp. nuttallii Nuttall's bedstraw D Rutaceae - Rue Family Cneoridium dumosum (Nutt.) Baill. bushrue Cm Salicaceae - Willow Family Salix exigua Nutt. narrow-leaved willow W Salix gooddingii C. R. Ball Goodding's black willow W Salix lasiolepis Benth. arroyo willow M,W Salix lucida Muhl. ssp. lasiandra (Benth.) E. Murray lance-leaf willow W Saururaceae - Lizard-tail Family Anemopsis californica (Nutt.) Hook. & Arn. yerba mansa A,W Saxifragaceae - Saxifrage Family Jepsonia parryi (Torr.)Small coast jepsonia R,D Scrophulariaceae - Figwort Family Castilleja exserta (A. Heller)Chuang & Heckard ssp. exserta purple owl's-clover N,D,Cm Cordylanthus rigidus (Benth.)Jeps. ssp. setigerus Chuang & Heckard dark-tip bird's-beak D,Cm Keckiella cordifolia (Benth.)Straw climbing bush penstemon D Mimulus aurantiacus Curtis coast monkeyflower D,Cm Scrophularia californica Cham. & Schldl. ssp. floribunda (Greene)Shaw California figwort D Simmondsiaceae - Jojoba Family Simmondsia chinensis (Link)C.K. Schneid. jojoba Cm Solanaceae - Nightshade Family *Nicotiana glauca Graham tree tobacco W,X Solanum parishii A. Heller Parish's nightshade D Lake Calavera Trails – Biological Resources Report Scientific Name Common Name Habitat Merkel & Associates, Inc. #04-101-01 A-1-7 Tamaricaceae - Tamarisk Family Tamarix sp. tamarisk W MONOCOTYLEDONS Arecaceae - Palm Family Washingtonia filifera (L. Linden) H. Wendl. California fan palm W Cyperaceae - Sedge Family Carex spissa L. H. Bailey San Diego sedge W Cyperus eragrostis Lam. tall flatsedge F,W Eleocharis macrostachya Britton pale spike-sedge A,F Eleocharis montevidensis Kunth Dombey's spike-sedge W Scirpus californicus (C.A. Mey.)Steud. California bulrush F,R,W Iridaceae - Iris Family Sisyrinchium bellum S. Watson blue-eyed grass D,V,N Juncaceae - Rush Family Juncus acutus L. ssp. leopoldii (Parl.)Snogerup spiny rush A,W Juncus bufonius L. var. bufonius toad rush W,X Juncus dubius Engelm. mariposa rush W Juncus mexicanus Willd. ex Schult. & Schult. F. Mexican rush A,W Juncus xiphioides E. Mey. iris-leaf rush W Liliaceae - Lily Family *Agave americana L. American agave Cm Bloomeria crocea (Torr.)Coville common goldenstar D Calochortus splendens Benth. splendid mariposa D Chlorogalum pomeridianum (DC.)Kunth wavy-leaf soap-plant D,V,X Dichelostemma capitatum (Benth.) A. W. Wood ssp. capitatum wild hyacinth D Yucca schidigera Ortgies Mojave yucca D,Cm Poaceae - Grass Family *Arundo donax L. giant reed W *Avena barbata Link slender wild oat N *Bromus diandrus Roth ripgut grass N *Bromus hordeaceus L. soft chess N *Bromus madritensis L. ssp. rubens (L.)Husn. red brome N *Cortaderia jubata (Lemoine)Stapf pampas grass Dw,W Distichlis spicata (L.)Greene saltgrass A,F,M,D,V,N *Gastridium ventricosum (Gouan)Schinz & Thell. nit grass D *Hordeum murinum L. ssp. leporinum (Link)Arcang. hare barley N Leymus condensatus (Presl)A. Love giant wild rye F,W,D *Lolium multiflorum Lam. Italian ryegrass X Lake Calavera Trails – Biological Resources Report Scientific Name Common Name Habitat Merkel & Associates, Inc. #04-101-01 A-1-8 Nassella lepida (Hitchc.)Barkworth foothill needlegrass V Nassella pulchra (Hitchc.)Barkworth purple needlegrass D,V *Piptatherum miliaceum (L.)Cosson smilo grass D *Polypogon monspeliensis (L.)Desf. annual beard grass A,W *Vulpia myuros (L.) C.C Gmel. var. hirsuta Hack. foxtail fescue N Typhaceae - Cat-Tail Family Typha latifolia L. broad-leaved cattail F,W Lake Calavera Trails – Biological Resources Report Merkel & Associates, Inc. #04-101- APPENDIX 2. INTERNAL/EXTERNAL PHOTO POINTS. Lake Calavera Trails – Biological Resources Report Merkel & Associates, Inc. #04-101-01 A-2-2 Photo Point 1. Photo taken within Locator Grid D3. Photo directed south and taken 01/14/05. Photo Point 3. Photo taken within Locator Grid B6. Photo directed west and taken 01/14/05. Photo Point 5. Photo taken within Locator Grid F5. Photo directed east and taken 11/03/04. Photo Point 2. Photo taken within Locator Grid C4. Photo directed south and taken 01/14/05. Photo Point 4. Photo taken within Locator Grid E5. Photo directed west and taken 01/14/05. Photo Point 6. Photo taken within Locator Grid G4. Photo directed northeast and taken 01/14/05. Location of proposed catwalk. Lake Calavera Trails – Biological Resources Report Merkel & Associates, Inc. #04-101-01 A-2-3 Photo Point 7. Photo taken of northwestern portion of study area. Photo directed northwest and taken 01/14/05. Photo Point 9. Photo taken within Locator Grid J1. Photo directed south and taken 05/12/05. Photo Point 11. Photo taken within Locator Grid G2. Photo directed east and taken 11/04/04. Photo Point 8. Photo taken within Locator Grid J3. Photo directed southwest and taken 11/04/04. Photo Point 10. Photo taken within Locator Grid G2. Photo directed southeast and taken 11/04/04. Photo Point 12. Photo taken within Locator Grid I2. Photo directed east and taken 05/12/05. Location of proposed catwalk. Lake Calavera Trails – Biological Resources Report Merkel & Associates, Inc. #04-101-01 A-2-4 Photo Point 13. Photo taken within Locator Grid I1. Photo directed east and taken 05/12/05. Location of proposed catwalk. Photo Point 15. Photo taken within Locator Grid G3. Photo directed southeast and taken 11/04/04. Photo Point 17. Photo taken within Locator Grid J5. Photo directed south and taken 11/05/04. This trail will be closed. Photo Point 14. Photo taken within Locator Grid I1. Photo directed east and taken 05/12/05. Photo Point 16. Photo taken within Locator Grid F3. Photo directed north and taken 11/03/04. This trail will be closed. Photo Point 18. Photo taken within Locator Grid J5. Photo directed north and taken 11/05/04. This trail will be closed. Lake Calavera Trails – Biological Resources Report Merkel & Associates, Inc. #04-101- APPENDIX 3. WETLAND DATA FORMS. DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:January 31, 2002 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Vanessa A. Lee, Kara A. Altvater State:California Do normal circumstances exist on the site? Yes No Community ID: SWS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP1, PP1 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Nicotiana glauca S FAC 9. 2.Vulpia myuros H FACU 10. 3.Baccharis salicifolia S FACW 11. 4.Sambucus mexicana S FAC 12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 75% Remarks: Hydrophytic vegetation criteria satisfied. Some DCSS species interspersed in vegetation, such as California Sagebrush and Goldenbush, but they are not dominants. HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: ---(in.) Drainage Patterns in Wetlands Depth to free Water in Pit ---(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: ---(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: No hydrology indicators. Data point located outside bank of drainage patterns. 181 □ □ 181 □ 181 ~ □ ~ □ □ □ □ □ □ □ □ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Las Flores loamy fine sand Drainage Class: Moderately well drained Field Observations Taxonomy (Subgroup): Haplic Natrixeralfs Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-12 10 YR 4/2 7.5 YR 4/6 large, distinct, coarse sandy clay Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Low-chroma color soils with mottles and concretions. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Patch of Mule Fat Scrub within Southern Willow Scrub vegetation. CDFG jurisdiction only. Approved by HQUSACE 3/92 □ □ □ □ □ □ □ □ □ □ ~ □ ~ □ ~ □ □ ~ ~ □ □ ~ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:January 31, 2002 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Vanessa A. Lee, Kara A. Altvater State:California Do normal circumstances exist on the site? Yes No Community ID: SWS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP2, PP2 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Picris echioides H FAC 9. 2.Hirschfeldia incana H UPL 10. 3.Baccharis salicifolia S FACW 11. 4.Sambucus mexicana S FAC 12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 75% Remarks: Hydrophytic vegetation criteria satisfied. HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: ---(in.) Drainage Patterns in Wetlands Depth to free Water in Pit ---(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: ---(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: No hydrology indicators. Soil is moist but not saturated. 181 □ □ 181 □ 181 ~ □ ~ □ □ □ □ □ □ □ □ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Las Flores loamy fine sand Drainage Class: Moderately well drained Field Observations Taxonomy (Subgroup): Haplic Natrixeralfs Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-16 7.5 YR 3/2 sandy clay loam Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: No hydric soil indicators. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Southern Willow Scrub vegetation under CDFG jurisdiction only. Approved by HQUSACE 3/92 □ □ □ □ □ □ □ □ □ □ □ □ □ □ ~ □ □ ~ □ ~ □ ~ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:January 31, 2002 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Vanessa A. Lee, Kara A. Altvater State:California Do normal circumstances exist on the site? Yes No Community ID: SWS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP3, PP3 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Sambucus mexicana S FAC 9. 2.Cyperus eragrostis H FACW 10. 3.Baccharis salicifolia S FACW 11. 4.12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 100% Remarks: Mule Fat Scrub at perimeter of pond surrounded by Southern Willow Scrub. HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: ---(in.) Drainage Patterns in Wetlands Depth to free Water in Pit 6 (in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: 1 (in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Data point located at edge of pond. 181 □ □ 181 □ 181 ~ □ ~ □ □ ~ □ □ □ □ □ □ □ □ ~ □ SOILS Map Unit Name (Series and Phase): Las Flores loamy fine sand Drainage Class: Moderately well drained Field Observations Taxonomy (Subgroup): Haplic Natrixeralfs Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-16 7.5 YR 4/2 sandy clay loam Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Hydric soils indicated by aquic moisture regime. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Patch of Mule Fat Scrub vegetation within Southern Willow Scrub. Approved by HQUSACE 3/92 □ ~ □ □ □ □ □ □ ~ □ □ □ □ □ ~ □ ~ □ ~ □ ~ □ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:January 31, 2002 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Vanessa A. Lee, Kara A. Altvater State:California Do normal circumstances exist on the site? Yes No Community ID: CS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP4, PP4 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Baccharis pilularis SPL9. 2.eranium carolinianum HPL10. 3.uncus ubious H FACW 11. 4.mbrosia psilostachya H FAC 12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 50% Remarks: Coyote rush Scrub vegetation. Area consists of small island-like feature in middle of drainage. HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: ---(in.) Drainage Patterns in Wetlands Depth to free Water in Pit ---(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: 2 (in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Hydrology indicated by saturated soil. 181 □ □ 181 □ 181 ~ □ ~ □ □ ~ □ □ □ □ □ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Las Flores loamy fine sand Drainage Class: Moderately well drained Field Observations Taxonomy (Subgroup): Haplic Natrixeralfs Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-2 10 YR 3/2 sandy clay 2-12 10 YR 4/6 loamy sand Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: No hydric soil indicators. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Non-wetland Waters of the .S. Approved by HQUSACE 3/92 □ ~ □ □ □ □ □ □ □ □ □ □ □ □ □ ~ ~ □ □ ~ □ ~ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:January 31, 2002 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Vanessa A. Lee, Kara A. Altvater State:California Do normal circumstances exist on the site? Yes No Community ID: SWS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP5, PP5 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Baccharis salicifolia S FACW 9. 2.Salix lasiole is T FACW 10. 3.11. 4.12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 100% Remarks: Southern Willow Scrub vegetation. HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: ---(in.) Drainage Patterns in Wetlands Depth to free Water in Pit ---(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: 0 (in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Hydrology indicated by saturated soil. 181 □ □ 181 □ 181 ~ □ ~ □ □ ~ □ □ □ □ □ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Las Flores loamy fine sand Drainage Class: Moderately well drained Field Observations Taxonomy (Subgroup): Haplic Natrixeralfs Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-5 10 YR 3/2 7.5 YR 3/1 large, many, faint sandy clay loam 5-1 10 YR 5/2 clay Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Hydric soils indicated by low chroma colors and a uic moisture regime. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Southern Willow Scrub. Approved by HQUSACE 3/92 □ ~ □ □ □ □ □ □ ~ □ □ □ ~ □ ~ □ ~ □ ~ □ ~ □ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:January 31, 2002 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Vanessa A. Lee, Kara A. Altvater State:California Do normal circumstances exist on the site? Yes No Community ID: MFS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP6, PP6 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Baccharis salicifolia S FACW 9. 2.alosma laurina SN10. 3.Conium maculatum H FACW 11. 4.12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 66% Remarks: Mule Fat Scrub vegetation. HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: ---(in.) Drainage Patterns in Wetlands Depth to free Water in Pit ---(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: 0 (in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Hydrology indicated by saturated soil. 181 □ □ 181 □ 181 ~ □ ~ □ □ ~ □ □ □ □ □ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Las Flores loamy fine sand Drainage Class: Moderately well drained Field Observations Taxonomy (Subgroup): Haplic Natrixeralfs Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-16 2.5 YR 6/3 clay Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Mule Fat Scrub vegetation. Approved by HQUSACE 3/92 □ □ □ □ □ □ □ □ ~ □ □ □ □ □ ~ □ ~ □ ~ □ ~ □ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:January 31, 2002 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Vanessa A. Lee, Kara A. Altvater State:California Do normal circumstances exist on the site? Yes No Community ID: SWS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP7, PP7 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Baccharis salicifolia S FACW 9. 2.Cyperus eragrostis H FACW 10. 3.Salix lasiolepis T FACW 11. 4.12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 100% Remarks: dge of Southern Willow Scrub vegetation. Ad acent to Mule Fat Scrub vegetation. HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: ---(in.) Drainage Patterns in Wetlands Depth to free Water in Pit ---(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: 0 (in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Hydrology indicated by saturated soil. 181 □ □ 181 □ 181 ~ □ ~ ~ □ ~ □ □ □ □ □ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Las Flores loamy fine sand Drainage Class: Moderately well drained Field Observations Taxonomy (Subgroup): Haplic Natrixeralfs Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-2 2.5 YR 6/3 clay 2-rock Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Hydric soils indicated by a uic moisture regime. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Southern Willow Scrub. Approved by HQUSACE 3/92 □ ~ □ □ □ □ □ □ ~ □ □ □ □ □ ~ □ ~ □ ~ □ ~ □ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:January 31, 2002 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Vanessa A. Lee, Kara A. Altvater State:California Do normal circumstances exist on the site? Yes No Community ID: SWS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP , PP (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Salix lasiole is T FACW 9. 2.ha la ifolia HL10. 3.11. 4.12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 100% Remarks: Southern Willow Scrub vegetation growing in storm drain outfall. HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: ---(in.) Drainage Patterns in Wetlands Depth to free Water in Pit ---(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: ---(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Drainage patterns in storm drain outfall. 181 □ 181 □ □ 181 ~ □ ~ □ □ □ □ □ □ □ ~ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Las Flores loamy fine sand Drainage Class: Moderately well drained Field Observations Taxonomy (Subgroup): Haplic Natrixeralfs Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. gravel Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Hydric soils characteristics may be present in sediment between gravel. Soils assumed due to predominance of FACW and L species. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Atypical situation man-made wetland. Not urisdictional due to SWANK ruling given dis-connectivity to downstream wetlands. Approved by HQUSACE 3/92 □ □ □ □ □ □ □ □ □ □ □ □ □ □ ~ □ ~ □ ~ □ ~ □ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:January 31, 2002 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Vanessa A. Lee, Kara A. Altvater State:California Do normal circumstances exist on the site? Yes No Community ID: NN Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP , PP (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.irschfel ia incana HN9. 2.Baccharis saicifolia S FACW 10. 3.11. 4.12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 50% Remarks: Hydrophytic vegetation criteria not satisfied. HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: ---(in.) Drainage Patterns in Wetlands Depth to free Water in Pit ---(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: ---(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: No hydrology indicators. 181 □ □ 181 □ 181 ~ □ ~ □ □ □ □ □ □ □ □ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Las Flores loamy fine sand Drainage Class: Moderately well drained Field Observations Taxonomy (Subgroup): Haplic Natrixeralfs Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-12 10 YR 6/4 5 YR 5/ few, distinct, small silty clay loam Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: No hydric soil indicators. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: No wetland indicators. Approved by HQUSACE 3/92 □ ~ □ □ □ □ □ □ □ □ □ □ □ □ □ ~ □ ~ □ ~ □ ~ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:January 31, 2002 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Vanessa A. Lee, Kara A. Altvater State:California Do normal circumstances exist on the site? Yes No Community ID: FWM Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP10, PP10 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Scirpus californicus HL9. 2.10. 3.11. 4.12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 100% Remarks: Freshwater Marsh vegetation. HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: 2 (in.) Drainage Patterns in Wetlands Depth to free Water in Pit 0 (in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: 0 (in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Data point is at the edge of lake. 181 □ □ 181 □ 181 ~ □ ~ ~ □ ~ □ □ □ □ □ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Las Flores loamy fine sand Drainage Class: moderately well drained Field Observations Taxonomy (Subgroup): Haplic Natrixeralfs Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-2 --sand 2-6 10 YR 3/1 sandy clay Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Could not dig past 6 soil too hard . Hydric soil indicated by concentration of high organic content. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Freshwater Marsh at edge of lake. Approved by HQUSACE 3/92 □ ~ □ □ □ ~ □ □ □ □ □ □ □ □ ~ □ ~ □ ~ □ ~ □ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:January 31, 2002 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Vanessa A. Lee, Kara A. Altvater State:California Do normal circumstances exist on the site? Yes No Community ID: SWS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP11, PP11 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Salix lasiole is T FACW 9. 2.Baccharis salicifolia S FACW 10. 3.Picris echiodes H FAC 11. 4.ico iana lauca T FAC 12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 100% Remarks: Southern Willow Scrub vegetation. HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: ---(in.) Drainage Patterns in Wetlands Depth to free Water in Pit ---(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: ---(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Data point is within lake basin. 181 □ □ 181 □ 181 ~ □ ~ □ □ □ □ □ □ □ □ □ □ □ ~ ~ SOILS Map Unit Name (Series and Phase): Las Flores loamy fine sand Drainage Class: moderately well drained Field Observations Taxonomy (Subgroup): Haplic Natrixeralfs Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-1 2.5 Y /2 10 YR 5/6 small, faint, few sandy loam Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Hydric soils present. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Southern Willow Scrub at edge of lake. Approved by HQUSACE 3/92 □ ~ □ □ □ ~ □ □ □ □ □ □ ~ □ ~ □ ~ □ ~ □ ~ □ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:January 31, 2002 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Vanessa A. Lee, Kara A. Altvater State:California Do normal circumstances exist on the site? Yes No Community ID: CSS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP12, PP12 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.rtemisia californica SPL9. 2.Baccharis salicifolia S FACW 10. 3.Baccharis pilularis SPL11. 4.Sal ia mellifera SPL12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 25% Remarks: Vegetation criteria not satisfied. HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: ---(in.) Drainage Patterns in Wetlands Depth to free Water in Pit ---(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: ---(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: No hydrology indicators. 181 □ □ 181 □ 181 ~ □ ~ □ □ □ □ □ □ □ □ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Las Flores loamy fine sand Drainage Class: Moderately well drained Field Observations Taxonomy (Subgroup): Haplic Natrixeralfs Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-3 10 YR 4/2 clay loam 3-12 10 YR 4/3 clay loam Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: No hydric soil indicators found. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Diegan Coastal Sage Scrub vegetation. Approved by HQUSACE 3/92 □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ ~ □ ~ □ ~ □ ~ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Feb 14, 2002 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Vanessa A. Lee, Kara A. Altvater State:California Do normal circumstances exist on the site? Yes No Community ID: FWM Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP13, PP13 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Scirpis californicus SL9. 2.10. 3.11. 4.12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 100% Remarks: Freshwater Marsh vegetation. HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: ---(in.) Drainage Patterns in Wetlands Depth to free Water in Pit 4 (in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: 0 (in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Hydrology indicated by saturated soils. 181 □ □ 181 □ 181 ~ □ ~ □ □ ~ □ □ □ □ □ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Las Flores loamy fine sand Drainage Class: Moderately well drained Field Observations Taxonomy (Subgroup): Haplic Natrixeralfs Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-14 7.5 YR 2/1 sandy clay Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Hydric soils indicated by sulfidic odor and low-chroma colors. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Freshwater Marsh. Approved by HQUSACE 3/92 □ ~ □ □ □ □ ~ □ □ □ □ □ ~ □ ~ □ ~ □ ~ □ ~ □ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Feb 1 , 2002 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Vanessa A. Lee, Kara A. Altvater State:California Do normal circumstances exist on the site? Yes No Community ID: MFS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP1 , PP1 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Baccharis salicifolia S FACW 9. 2.Baccharis ilularis SN10. 3.is ichlis s ica a S FACW 11. 4.12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 66% Remarks: Mule Fat Scrub vegetation. HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: ---(in.) Drainage Patterns in Wetlands Depth to free Water in Pit ---(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: ---(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: No wetland hydrology indicators. 181 □ □ 181 □ 181 ~ □ ~ □ □ □ □ □ □ □ □ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Las Flores loamy fine sand Drainage Class: Moderately well drained Field Observations Taxonomy (Subgroup): Haplic Natrixeralfs Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-12 2.5 Y 6/2 sandy clay loam Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: No hydric soil indicators. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Mule Fat Scrub vegetation under CDFG jurisdiction only. Approved by HQUSACE 3/92 □ ~ □ □ □ □ □ □ □ □ □ □ □ □ ~ □ □ ~ □ ~ □ ~ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Feb 14, 2002 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Vanessa A. Lee, Kara A. Altvater State:California Do normal circumstances exist on the site? Yes No Community ID: FWM Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP15, PP15 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Baccharis salicifolia S FACW 9. 2.Baccharis pilularis SN10. 3.Cyperus eragrostis H FACW 11. 4.mbrosia psilostachya H FAC 12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 75% Remarks: Freshwater Marsh dominated by Baccharis. HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: ---(in.) Drainage Patterns in Wetlands Depth to free Water in Pit ---(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: 0 (in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Hydrology indicated by saturated soil. 181 □ □ 181 □ 181 ~ □ ~ □ □ ~ □ □ □ □ □ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Las Flores loamy fine sand Drainage Class: Moderately well drained Field Observations Taxonomy (Subgroup): Haplic Natrixeralfs Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-14 10 YR 5/3 10 YR 5/1 many, large, faint clay loam Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Saturated soils. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Freshwater Marsh. Approved by HQUSACE 3/92 □ ~ □ □ □ □ □ □ □ □ ~ □ □ □ ~ □ ~ □ ~ □ ~ □ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Feb 14, 2002 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Vanessa A. Lee, Kara A. Altvater State:California Do normal circumstances exist on the site? Yes No Community ID: FWM Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP16, PP16 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Scirpus californicus HL9. 2.istichlis spicata H FACW 10. 3.11. 4.12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 100% Remarks: Freshwater Marsh vegetation. HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: ---(in.) Drainage Patterns in Wetlands Depth to free Water in Pit 2 (in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: 0 (in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Hydrology indicated by saturated soil. 181 □ □ 181 □ 181 ~ □ ~ □ □ ~ □ □ □ □ □ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Las Flores loamy fine sand Drainage Class: moderately well drained Field Observations Taxonomy (Subgroup): Haplic Natrixeralfs Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-1 10 YR 2/1 clay Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Hydric soils indicated by low-chroma colors and a uic moisture regime. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Data point is within Freshwater Marsh. Approved by HQUSACE 3/92 □ ~ □ □ □ □ □ □ ~ □ □ □ ~ □ ~ □ ~ □ ~ □ ~ □ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Feb 14, 2002 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Vanessa A. Lee, Kara A. Altvater State:California Do normal circumstances exist on the site? Yes No Community ID: SWS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP17, PP17 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Salix lasiole is T FACW 9. 2.Baccharis salicifolia S FACW 10. 3.Hirschfeldia incana SPL11. 4.mbrosia silos ach a S FAC 12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 75% Remarks: HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: ---(in.) Drainage Patterns in Wetlands Depth to free Water in Pit ---(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: ---(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: 181 □ □ 181 □ 181 ~ □ ~ □ □ □ □ □ □ □ ~ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Las Flores loamy fine sand Drainage Class: Moderately well drained Field Observations Taxonomy (Subgroup): Haplic Natrixeralfs Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-4 10 YR 3/2 Many organic materials Sandy clay loam 4-14 10 YR 6/2 10 YR 3/1 Many, faint, large Sandy clay loam Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Redoxy-morphic features in the upper 12 inches indicate hydric soils. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Southern Willow Scrub vegetation. Approved by HQUSACE 3/92 □ □ □ □ □ □ □ □ □ □ ~ □ □ □ ~ □ ~ □ ~ □ ~ □ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Feb 14, 2002 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Vanessa A. Lee, Kara A. Altvater State:California Do normal circumstances exist on the site? Yes No Community ID: SWS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP1 , PP1 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Salix lasiolepis T FACW 9. 2.10. 3.11. 4.12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 100% Remarks: Southern Willow Scrub vegetation. HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: ---(in.) Drainage Patterns in Wetlands Depth to free Water in Pit ---(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: ---(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Hydrology indicated by drainage patterns. 181 □ □ 181 □ 181 ~ □ ~ □ □ □ □ □ □ □ ~ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Salinas clay loam Drainage Class: Well drained, moderately well drained Field Observations Taxonomy (Subgroup): Calcic Pachic Haploxerolls Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-4 10 YR 2/2 clay loam 4-14 10 YR 4/2 clay loam Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Soils are assumed due to predominance of FACW vegetation. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Southern Willow Scrub. Approved by HQUSACE 3/92 □ ~ □ □ □ □ □ □ □ □ □ □ □ □ ~ □ ~ □ ~ □ ~ □ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Feb 14, 2002 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Vanessa A. Lee, Kara A. Altvater State:California Do normal circumstances exist on the site? Yes No Community ID: CAM Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP1 , PP1 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.istichlis spicata H FACW 9. 2.anthium strumarium S FAC 10. 3.11. 4.12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 100% Remarks: Cis-montane Alkali Marsh vegetation. HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: ---(in.) Drainage Patterns in Wetlands Depth to free Water in Pit ---(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: 0 (in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Hydrology indicated by saturated soils. 181 □ □ 181 □ 181 ~ □ ~ □ □ ~ □ □ □ □ □ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Las Flores loamy fine sand Drainage Class: Moderately well drained Field Observations Taxonomy (Subgroup): Haplic Natrixeralfs Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-1 10 YR 3/1 clay 1-14 10 YR 5/2 sandy clay Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Hydric soils indicated by low chroma colors and organic streaking. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Cis-montane Alkali Marsh. Approved by HQUSACE 3/92 □ ~ □ □ □ □ □ ~ □ □ □ □ ~ □ ~ □ ~ □ ~ □ ~ □ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Feb 1 , 2002 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Vanessa A. Lee, Kara A. Altvater State:California Do normal circumstances exist on the site? Yes No Community ID: SWS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP20, PP20 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Salix lasiole is T FACW 9. 2.10. 3.11. 4.12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 100% Remarks: Southern Willow Scrub vegetation. HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: ---(in.) Drainage Patterns in Wetlands Depth to free Water in Pit ---(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: ---(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Hydrology indicated by drainage patterns. 181 □ □ 181 □ 181 ~ □ ~ □ □ □ □ □ □ □ ~ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Salinas clay loam Drainage Class: Well drained, moderately well drained Field Observations Taxonomy (Subgroup):Calcic Pachic Haploxerolls Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-1 2.5 Y 7/3 10 YR 3/2 many, large, distinct loamy sand Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Low-chroma colors with mottles. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Southern Willow Scrub. Approved by HQUSACE 3/92 □ ~ □ □ □ □ □ □ □ □ □ □ ~ □ ~ □ ~ □ ~ □ ~ □ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Feb 14, 2002 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Vanessa A. Lee, Kara A. Altvater State:California Do normal circumstances exist on the site? Yes No Community ID: NWW Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP21, PP21 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.rtemisia californica SN9. 2.irschfel ia incana SN10. 3.11. 4.12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 0% Remarks: No wetland vegetation at data point. HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: ---(in.) Drainage Patterns in Wetlands Depth to free Water in Pit ---(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: ---(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Hydrology indicated by drainage patterns. 181 □ □ 181 □ 181 ~ □ ~ □ □ □ □ □ □ □ ~ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Salinas clay loam Drainage Class: Well drained, moderately well drained Field Observations Taxonomy (Subgroup): Calcic Pachic Haploxerolls Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-14 2.5 Y 6/3 sandy loam Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: No hydric soil indicators. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Jurisdictional Non-wetland Waters of the .S. Approved by HQUSACE 3/92 □ ~ □ □ □ □ □ □ □ □ □ □ □ □ □ ~ ~ □ □ ~ □ ~ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Feb 14, 2002 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Vanessa A. Lee, Kara A. Altvater State:California Do normal circumstances exist on the site? Yes No Community ID: SWS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP22, PP22 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.uncus mexicanus H FACW 9. 2.Salix lasiolepis T FACW 10. 3.11. 4.12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 100% Remarks: Southern Willow Scrub vegetation. HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: ---(in.) Drainage Patterns in Wetlands Depth to free Water in Pit ---(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: 0 (in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Hydrology indicated by saturated soils and drainage patterns. 181 □ □ 181 □ 181 ~ □ ~ □ □ ~ □ □ □ □ ~ ~ □ □ □ □ SOILS Map Unit Name (Series and Phase): Salinas clay loam Drainage Class: Well drained, moderately well drained Field Observations Taxonomy (Subgroup): Calcic Pachic Haploxerolls Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-14 2.5 Y 4/1 clay Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Hydric soil indicated by low chroma soils and aquic moisture regime. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Southern Willow Scrub. Approved by HQUSACE 3/92 □ ~ □ □ □ □ □ □ ~ □ ~ □ ~ □ ~ □ ~ □ ~ □ ~ □ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Feb 1 , 2002 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Vanessa A. Lee, Kara A. Altvater State:California Do normal circumstances exist on the site? Yes No Community ID: SWS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP23, PP23 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.ashin onia filifera T FACW 9. 2.Salix lucida lasiandra TL10. 3.11. 4.12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 100% Remarks: Southern Willow Scrub vegetation. HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: ---(in.) Drainage Patterns in Wetlands Depth to free Water in Pit ---(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: ---(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Hydrology indicated by drainage patterns. 181 □ □ 181 □ 181 ~ □ ~ □ □ □ □ □ □ □ ~ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Salinas clay loam Drainage Class: well drained, moderately well drained Field Observations Taxonomy (Subgroup): Calcic Pachic Haploxerolls Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-1 10 YR 3/2 10 YR 5/ many, distinct, medium loam Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Hydric soil indicated by low chroma colors and mottles. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Southern Willow Scrub with palms. Approved by HQUSACE 3/92 □ ~ □ □ □ □ □ □ □ □ □ □ ~ □ ~ □ ~ □ ~ □ ~ □ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Feb 15, 2002 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Vanessa A. Lee, Kara A. Altvater State:California Do normal circumstances exist on the site? Yes No Community ID: SWS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP24, PP24 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Scirpis californicus HL9. 2.Salix lasiolepis T FACW 10. 3.irschfel ia incana HN11. 4.12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 66% Remarks: Southern Willow Scrub vegetation with Freshwater Marsh understory. HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: ---(in.) Drainage Patterns in Wetlands Depth to free Water in Pit ---(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: ---(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Hydrology indicated by drainage patterns. 181 □ □ 181 □ 181 ~ □ ~ □ □ □ □ □ □ □ ~ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Las Flores loamy fine sand Drainage Class: Moderately well drained Field Observations Taxonomy (Subgroup): Haplic Natrixeralfs Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-12 2.5 Y 2.5/1 clay Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Hydric soil indicated by low chroma colors. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Southern Willow Scrub. Approved by HQUSACE 3/92 □ ~ □ □ □ □ □ □ □ □ □ □ ~ □ ~ □ ~ □ ~ □ ~ □ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Feb 15, 2002 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Vanessa A. Lee, Kara A. Altvater State:California Do normal circumstances exist on the site? Yes No Community ID: NWW Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP25, PP25 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Bromus hor eaceus HN9. 2.Bromus ma ritensis rubens HN10. 3.Bromus ian rus HN11. 4.12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 0% Remarks: No wetland vegetation within drainage. HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: ---(in.) Drainage Patterns in Wetlands Depth to free Water in Pit ---(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: ---(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Hydrology indicated by drainage patterns. 181 □ □ 181 □ 181 ~ □ ~ □ □ □ □ □ □ □ ~ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Las Flores loamy fine sand Drainage Class: moderately well drained Field Observations Taxonomy (Subgroup): Haplic Natrixeralfs Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-14 sand Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: No hydric soil indicators. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Jurisdictional Non-wetland Waters along trail. Approved by HQUSACE 3/92 □ ~ □ □ □ □ □ □ □ □ □ □ □ □ □ ~ ~ □ □ ~ □ ~ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Feb 15, 2002 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Vanessa A. Lee, Kara A. Altvater State:California Do normal circumstances exist on the site? Yes No Community ID: SMC Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP26, PP26 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.uncus dubius H FACW 9. 2.He eromeles arbu ifolia SN10. 3.e mus condensa us S FACU 11. 4.12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 33% Remarks: Wetland vegetation criteria not satisfied. Data point bordering Southern Mixed Chaparral and Southern Willow Scrub vegetation. HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: ---(in.) Drainage Patterns in Wetlands Depth to free Water in Pit ---(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: ---(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: No hydrology indicators. 181 □ □ 181 □ 181 ~ □ ~ □ □ □ □ □ □ □ □ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Las Flores loamy fine sand Drainage Class: Moderately well drained Field Observations Taxonomy (Subgroup): Haplic Natrixeralfs Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-2 10 YR 3/2 sandy clay loam 2-1 10 YR 5/2 sandy clay loam Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: No indicators of hydric soils. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Data point located at boundary of Southern Willow Scrub and Southern Mixed Chaparral vegetation. Dominant plant species however, are predominately upland species. Approved by HQUSACE 3/92 □ ~ □ □ □ □ □ □ □ □ □ □ □ □ □ ~ □ ~ □ ~ □ ~ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Feb 15, 2002 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Vanessa A. Lee, Kara A. Altvater State:California Do normal circumstances exist on the site? Yes No Community ID: CL RF Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP27, PP27 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.uercus agrifolia TN9. 2.10. 3.11. 4.12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 0% Remarks: Coast Live ak Riparian Forest near streambed. No understory vegetation possibly because of fire, but surrounding plants are upland species such as Marah macrocarpus, Toyon, etc. Therefore, wetland vegetation is not expected to have occured prior to fire. HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: ---(in.) Drainage Patterns in Wetlands Depth to free Water in Pit ---(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: ---(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: No hydrology indicators. 181 □ □ 181 □ 181 ~ □ ~ □ □ □ □ □ □ □ □ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Salinas clay loam Drainage Class: Well drained, moderately well drained Field Observations Taxonomy (Subgroup): Calcic Pachic Haploxerolls Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-12 10 YR 3/2 loam Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: No hydric soil indicators. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Coast Live ak Riparian Forest. Approved by HQUSACE 3/92 □ ~ □ □ □ □ □ □ □ □ □ □ □ □ □ ~ □ ~ □ ~ □ ~ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Nov 1 , 2004 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Amanda K. on ales, onnie L. Peterson State:California Do normal circumstances exist on the site? Yes No Community ID: SWS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP2 , PP2 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Salix lasiolepis T FACW 9. 2.10. 3.11. 4.12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 100 percent Remarks: Hydrophytic vegetation dominant. HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: -(in.) Drainage Patterns in Wetlands Depth to free Water in Pit -(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: -(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Drift lines indicate wetland hydrology present. 181 □ □ 181 □ 181 ~ □ ~ □ □ □ □ □ ~ □ □ □ ~ □ □ □ SOILS Map Unit Name (Series and Phase): Salinas clay loam Drainage Class: Well drained, moderately well drained Field Observations Taxonomy (Subgroup): Calcic Pachic Haploxerolls Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-6 - 10YR 4/2 --Sandy Loam Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Hydric soils not present. Earth worms abundant, roots present. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Data point in southern willow scrub just off foot path. Jurisdictional under CDFG as adjacent riparian. Approved by HQUSACE 3/92 181 □ □ □ □ □ □ □ □ □ □ □ □ □ ~ □ ~ □ □ ~ □ ~ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Nov 1 , 200 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Amanda K. Gon ales, onnie L. Peterson State:California Do normal circumstances exist on the site? Yes No Community ID: SWS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP2 , PP2 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Salix lasiole is T FACW 9. 2.nemo sis californica H L 10. 3. 11. 4. 12. 5. 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 100 percent Remarks: Hydrophytic vegetation dominant. HYDROLOGY Recorded Data (Described in Remarks): Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: 1 (in.) Drainage Patterns in Wetlands Depth to free Water in Pit -(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: -(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Data point located in drainage. Channel width 8 feet. 181 □ □ 181 □ 181 ~ □ ~ ~ □ □ □ □ □ □ ~ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Salinas clay loam Drainage Class: Well drained, moderately well drained Field Observations Taxonomy (Subgroup): Calcic Pachic Haploxerolls Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Soils assumed due to inundation. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Data point in southern willow scrub just off foot path. Jurisdictional under ACOE and CDFG. Approved by HQUSACE 3/92 181 □ □ □ □ □ □ □ □ □ □ □ □ □ ~ □ ~ □ ~ □ ~ □ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Nov 1 , 2004 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Amanda K. on ales, onnie L. Peterson State:California Do normal circumstances exist on the site? Yes No Community ID: SWS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP30, PP30 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Salix lasiolepis T FACW 9. 2.latine brachysperma H L 10. 3.Corta eria ubata S FAC 11. 4. 12. 5. 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 100 percent Remarks: Hydrophytic vegetation dominant. Cortaderia jubata has been classified as a FAC speices due to the invasiveness of this species. It is located within drainages as well as adjacent to drainages and therefore can be found in moist wetland areas. HYDROLOGY Recorded Data (Described in Remarks): Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: -(in.) Drainage Patterns in Wetlands Depth to free Water in Pit -(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: -(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Wetland hydrology present. 181 □ □ 181 □ 181 ~ □ ~ □ □ □ □ □ ~ □ □ □ ~ □ □ □ SOILS Map Unit Name (Series and Phase): Salinas clay loam Drainage Class: Well drained, moderately well drained Field Observations Taxonomy (Subgroup): Calcic Pachic Haploxerolls Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-12 - 10YR 4/2 - -Silty Clay Loam Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Hydric soils not present. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Data point located in southern willow scrub adjacent to the existing foot path. Jurisdictional under CDFG as adjacent riparian. Approved by HQUSACE 3/92 181 □ □ □ □ □ □ □ □ □ □ □ □ □ ~ □ ~ □ □ ~ □ ~ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Nov 1 , 2004 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Amanda K. on ales, onnie L. Peterson State:California Do normal circumstances exist on the site? Yes No Community ID: CSS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP31, PP31 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Sal ia mellifera S N 9. 2.irschfel ia incana H N 10. 3.Cynara car unculus H N 11. 4. 12. 5. 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 0 percent Remarks: No hydrophytic vegetation present. HYDROLOGY Recorded Data (Described in Remarks): Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: -(in.) Drainage Patterns in Wetlands Depth to free Water in Pit -(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: -(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: No wetland hydrology present. 181 □ □ 181 □ 181 ~ □ ~ □ □ □ □ □ □ □ □ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Cineba-Fallbrook rocky sandy loam Drainage Class: xcessively drained Field Observations Taxonomy (Subgroup): Typic erorthents Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-10 - 7.5YR 2.5/2 - -Loamy Sand Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Hydric soils not present. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Data point located within Diegan coastal sage scrub. Approved by HQUSACE 3/92 181 □ □ □ □ □ □ □ □ □ □ □ □ □ □ ~ □ ~ □ ~ □ ~ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Nov 1 , 200 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Amanda K. Gon ales, onnie L. Peterson State:California Do normal circumstances exist on the site? Yes No Community ID: SWS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP32, PP32 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Salix lasiole is T FACW 9. 2.nemo sis californica H L 10. 3.or aderia uba a S FAC 11. 4. 12. 5. 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 100 percent Remarks: Hydrophytic vegetation dominant. Cortaderia jubata has been classified as a FAC species due to the invasiveness of this species. It is located within drainages as well as adjacent to drainages and therefore can be found in moist wetland areas. HYDROLOGY Recorded Data (Described in Remarks): Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: -(in.) Drainage Patterns in Wetlands Depth to free Water in Pit -(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: 6 (in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Wetland hydrology present. 181 □ □ 181 □ 181 ~ □ ~ □ □ ~ □ □ ~ □ □ □ ~ □ ~ □ SOILS Map Unit Name (Series and Phase): Salinas clay loam Drainage Class: Well drained, moderately well drained Field Observations Taxonomy (Subgroup): Calcic Pachic Haploxerolls Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-2 - 10YR 5/3 - -Loamy Sand 2- - 10YR 3/1 7.5YR /6 2%Clay Loam Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Hydric soils present. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Data point located in southern willow scrub. Jurisdictional under ACOE and CDFG. Approved by HQUSACE 3/92 181 □ □ □ □ □ □ □ □ □ □ □ ~ □ ~ □ ~ □ ~ □ ~ □ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Nov 1 , 2004 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Amanda K. on ales, onnie L. Peterson State:California Do normal circumstances exist on the site? Yes No Community ID: CSS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP33, PP33 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.istichlis spicata H FACW 9. 2.irschfel ia incana H N 10. 3.ro ium sp H N 11. 4.rtemisia californica S N 12. 5. 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 25 percent Remarks: Hydrophytic vegetation not dominant. HYDROLOGY Recorded Data (Described in Remarks): Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: -(in.) Drainage Patterns in Wetlands Depth to free Water in Pit -(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: -(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Drift lines indicate wetland hydrology present. 181 □ □ 181 □ 181 ~ □ ~ □ □ □ □ □ ~ □ □ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Cineba-Fallbrook rocky sandy loam Drainage Class: xcessively drained Field Observations Taxonomy (Subgroup): Typic erorthents Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-12 - 7.5YR 3/2 - -Sandy Loam Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Hydric soils not present. Abundant amount of roots found within surface. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Data point located in Diegan coastal sage scrub. Approved by HQUSACE 3/92 181 □ □ □ □ □ □ □ □ □ □ □ □ □ □ ~ ~ □ □ ~ □ ~ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Nov 1 , 2004 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Amanda K. on ales, onnie L. Peterson State:California Do normal circumstances exist on the site? Yes No Community ID: DW Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP34, PP34 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Corta eria ubata S FAC 9. 2.Baccharis pilularis S N 10. 3. 11. 4. 12. 5. 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 50 percent Remarks: Hydrophytic vegetation not dominant. HYDROLOGY Recorded Data (Described in Remarks): Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: -(in.) Drainage Patterns in Wetlands Depth to free Water in Pit -(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: -(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Drift lines indicate wetland hydrology present. 181 □ □ 181 □ 181 ~ □ ~ □ □ □ □ □ ~ □ □ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Cineba-Fallbrook rocky sandy loam Drainage Class: xcessively drained Field Observations Taxonomy (Subgroup): Typic erorthents Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-12 - 10YR 3/2 10YR /6 30%Clay Loam Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Soils with low chroma and mottles indicate hydric soils. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Data point located within an area of disturbed wetland dominated by Cortaderia jubata. Baccharis pilularis shrubs are also present within this area. Jurisdictional under CDFG only. Approved by HQUSACE 3/92 181 □ □ □ □ □ □ □ □ □ □ □ ~ □ □ ~ ~ □ ~ □ □ ~ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Nov 1 , 2004 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Amanda K. on ales, onnie L. Peterson State:California Do normal circumstances exist on the site? Yes No Community ID: SWS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP35, PP35 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Salix lasiole is T FACW 9. 2.is ichlis s ica a H FACW 10. 3.uncus acu us H FACW 11. 4.Baccharis ilularis S N 12. 5. 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 75 percent Remarks: Hydrophytic vegetation dominant. HYDROLOGY Recorded Data (Described in Remarks): Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: -(in.) Drainage Patterns in Wetlands Depth to free Water in Pit -(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: -(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Wetland hydrology present. 181 □ □ 181 □ 181 ~ □ ~ □ □ □ □ ~ □ □ □ □ ~ □ □ □ SOILS Map Unit Name (Series and Phase): Cineba-Fallbrook rocky sandy loam Drainage Class: xcessively drained Field Observations Taxonomy (Subgroup): Typic erorthents Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-6 - 10YR 2/2 - -Sandy Clay Loam Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Hydric soils not present. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Data point located on boundary between southern willow scrub and Diegan coastal sage scrub. Southern willow scrub vegetation dominant. Jurisdictional under CDFG only. Approved by HQUSACE 3/92 181 □ □ □ □ □ □ □ □ □ □ □ □ □ ~ □ ~ □ □ ~ □ ~ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Nov 1 , 2004 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Amanda K. on ales, onnie L. Peterson State:California Do normal circumstances exist on the site? Yes No Community ID: FWM Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP36, PP36 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.nemopsis californica H L 9. 2.uncus acutus H FACW 10. 3.mbrosia psilostachya H FAC 11. 4.uncus mexicanus H FACW 12. 5. 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 100 percent Remarks: Data point located within an open marsh area. Hydrophytic vegetation dominant. HYDROLOGY Recorded Data (Described in Remarks): Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: -(in.) Drainage Patterns in Wetlands Depth to free Water in Pit 12 (in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: 3-12 (in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Saturated in upper 12 inches. Presence of drift lines and saturated soil indicate hydric soils. 181 □ □ 181 □ 181 ~ □ ~ □ □ ~ □ □ ~ □ □ □ ~ □ □ □ SOILS Map Unit Name (Series and Phase): Cineba-Fallbrook rocky sandy loam Drainage Class: xcessively drained Field Observations Taxonomy (Subgroup): Typic erorthents Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-1 rganic Matter 1-3 10YR 4/2 - -Silty Clay Loam 3-12 2.5N Sandy Clay/ leyed Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Hydric soils present. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Data point within open marsh area. Jurisdictional under ACOE and CDFG. Approved by HQUSACE 3/92 181 □ □ □ □ □ □ □ □ □ □ □ ~ □ ~ □ ~ □ ~ □ ~ □ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Nov 1 , 2004 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Amanda K. on ales, onnie L. Peterson State:California Do normal circumstances exist on the site? Yes No Community ID: FWM Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP37, PP37 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.uncus acu us H FACW 9. 2.ium ra eolens H FACW 10. 3.nemo sis californica H L 11. 4. 12. 5. 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 100 percent Remarks: Hydrophytic vegetation dominant. HYDROLOGY Recorded Data (Described in Remarks): Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: -(in.) Drainage Patterns in Wetlands Depth to free Water in Pit -(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: -(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Hydrology present. 181 □ □ 181 □ 181 ~ □ ~ □ □ □ □ □ ~ □ □ □ ~ □ □ □ SOILS Map Unit Name (Series and Phase): Cineba-Fallbrook rocky sandy loam Drainage Class: xcessively drained Field Observations Taxonomy (Subgroup): Typic erorthents Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Hydric soils assumed based on dominant flora species being comprised of OBL and FACW plants. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Data point located within open marsh area. Located near boundary between open marsh area and the area mapped as disturbed wetland. Data point 37 is jurisdictional underACOE and CDFG. Approved by HQUSACE 3/92 181 □ □ □ □ □ □ □ □ □ □ □ □ □ ~ □ ~ □ ~ □ ~ □ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Nov 1 , 2004 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Amanda K. on ales, onnie L. Peterson State:California Do normal circumstances exist on the site? Yes No Community ID: CSS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP3 , PP3 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Baccharis pilularis S N 9. 2.asella sp H N 10. 3.oxico en ron i ersilobum S N 11. 4. 12. 5. 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 0 percent Remarks: Hydrophytic vegetation not present. HYDROLOGY Recorded Data (Described in Remarks): Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: -(in.) Drainage Patterns in Wetlands Depth to free Water in Pit -(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: -(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Hydrology present due to presence of drift lines. 181 □ □ 181 □ 181 ~ □ ~ □ □ □ □ □ ~ □ □ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Salinas clay loam Drainage Class: Well drained, moderately drained Field Observations Taxonomy (Subgroup): Calcic Pachic Haploxerolls Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0- - 10YR 4/2 - -Loamy Sandy Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Hydric soils not present. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Data point located in Diegan coastal sage scrub. Approved by HQUSACE 3/92 181 □ □ □ □ □ □ □ □ □ □ □ □ □ □ ~ ~ □ □ ~ □ ~ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Nov 1 , 2004 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Amanda K. on ales, onnie L. Peterson State:California Do normal circumstances exist on the site? Yes No Community ID: SWS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP3 , PP3 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.icris echioi es H FAC 9. 2.uercus agrifolia T N 10. 3.11. 4. 12. 5. 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 50 percent Remarks: Hydrophytic vegetation not dominant. Currently the area is relatively open with young upland species; however, there is evidence that Typha latifolia was present. Evidence of flowing water within this area is observed due to the vegetation pushed over. In addition, just to the east are Salix lasiolepis trees with drift line within the branches. It is determined that hydric vegetation was present; however, due to rain events the vegetation was removed and invasive upland species have expanded their range. HYDROLOGY Recorded Data (Described in Remarks): Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: -(in.) Drainage Patterns in Wetlands Depth to free Water in Pit -(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: -(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Data point located adjacent to a small stream. Wetland hydrology present due to presence of drift lines. □ ~ ~ □ □ ~ ~ □ ~ □ □ □ □ □ ~ □ □ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Altamont clay Drainage Class: Well drained Field Observations Taxonomy (Subgroup): Typic Chromoxererts Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0- - 10YR 2/1 - - Clay Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Hydric soils present. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Data point is located within a disturbed area of southern willow scrub. This is an atypical situation where rain events have removed hydrophytic vegetation. Jurisdictional under ACOE and CDFG. Approved by HQUSACE 3/92 181 □ □ □ □ □ □ □ □ □ □ □ ~ □ ~ □ ~ □ ~ □ ~ □ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Nov 1 , 2004 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Amanda K. on ales, onnie L. Peterson State:California Do normal circumstances exist on the site? Yes No Community ID: CSS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP40, PP40 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.asella s H N 9. 2.uercus a rifolia T N 10. 3.onicera subs ica a S N 11. 4.Baccharis ilularis S N 12. 5.Sis rinchium bellum H FAC 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 20 percent Remarks: Hydrophytic vegetation not dominant. HYDROLOGY Recorded Data (Described in Remarks): Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: -(in.) Drainage Patterns in Wetlands Depth to free Water in Pit -(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: -(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Wetland hydrology not present. 181 □ □ 181 □ 181 ~ □ ~ □ □ □ □ □ □ □ □ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Altamont clay Drainage Class: Well drained Field Observations Taxonomy (Subgroup): Typic Chromoxererts Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-10 - 10YR 4/2 - -Clay Loam Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Hydric soils not present. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Data point located in Diegan coastal sage scrub. Approved by HQUSACE 3/92 181 □ □ □ □ □ □ □ □ □ □ □ □ □ □ ~ □ ~ □ ~ □ ~ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Nov 1 , 2004 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Amanda K. on ales, onnie L. Peterson State:California Do normal circumstances exist on the site? Yes No Community ID: CSS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP41, PP41 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Baccharis pilularis S N 9. 2.rtemisia californica S N 10. 3. 11. 4. 12. 5. 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 0 percent Remarks: Hydrophytic vegetation not dominant. HYDROLOGY Recorded Data (Described in Remarks): Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: -(in.) Drainage Patterns in Wetlands Depth to free Water in Pit -(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: -(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Data point located within an incised channel. 181 □ □ 181 □ 181 ~ □ ~ □ □ □ □ □ □ □ ~ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Altamont clay Drainage Class: Well drained Field Observations Taxonomy (Subgroup): Typic Chromoxererts Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-3 - 10YR 4/3 - -Loamy Sand 3-10 - 10YR 4/2 - -Sandy Clay Loam Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Hydric soils not present. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Data point located in Diegan coastal sage scrub within an incised channel. Jurisdicational under ACOE and CDFG as non-wetland water of the U.S./streambed. ACOE (1 foot), CDFG (10 feet). Approved by HQUSACE 3/92 181 □ □ □ □ □ □ □ □ □ □ □ □ □ □ ~ ~ □ □ ~ □ ~ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Nov 1 , 2004 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Amanda K. on ales, onnie L. Peterson State:California Do normal circumstances exist on the site? Yes No Community ID: SCL RF Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP42, PP42 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.uncus acutus H FACW 9. 2.Scirpus californicus H L 10. 3.Salix lasiolepis T FACW 11. 4.uercus agrifolia T N 12. 5. 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 75 percent Remarks: Hydrophytic vegetation dominant. HYDROLOGY Recorded Data (Described in Remarks): Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: -(in.) Drainage Patterns in Wetlands Depth to free Water in Pit -(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: -(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: No hydrology present. 181 □ □ 181 □ 181 ~ □ ~ □ □ □ □ □ □ □ □ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Las Flores loamy fine sand Drainage Class: Moderately well drained Field Observations Taxonomy (Subgroup): Haplic Natrixeralfs Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 1-7 - 10YR /2 7.5YR 5/6 2 Loamy Sand 7-10 - /10 10YR 5/6 30 Silt Loam Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Hydric soils present. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Data point located under the canopy of southern coast live oak riparian forest directly adjacent to a small stream. Jurisdictional under CDFG only. Approved by HQUSACE 3/92 181 □ □ □ □ □ □ □ □ □ □ □ ~ □ ~ □ □ ~ ~ □ □ ~ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Dec , 2004 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Daylon L. Teel, onnie L. Peterson State:California Do normal circumstances exist on the site? Yes No Community ID: CAM Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP43, PP43 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.uncus mexicanus H FACW 9. 2.uncus acu us H FACW 10. 3. 11. 4. 12. 5. 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 100 percent Remarks: Hydrophytic vegetation dominant. HYDROLOGY Recorded Data (Described in Remarks): Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: -(in.) Drainage Patterns in Wetlands Depth to free Water in Pit -(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: 0 (in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Wetland hydrology present. 181 □ □ 181 □ 181 ~ □ ~ □ □ ~ □ □ □ □ □ □ □ □ ~ □ SOILS Map Unit Name (Series and Phase): Salinas clay loam Drainage Class: Well drained, moderately well drained Field Observations Taxonomy (Subgroup): Calcic Pachic Haploxerolls Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-10 - 10YR 3/1 - -Loamy Sand Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Low chroma indicates hydric soils. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Data point located in cismontane alkali marsh. ACOE and CDFG jurisdiction. Approved by HQUSACE 3/92 181 □ □ □ □ □ □ □ □ □ □ □ ~ □ ~ □ ~ □ ~ □ ~ □ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Dec , 2004 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Daylon L. Teel, onnie L. Peterson State:California Do normal circumstances exist on the site? Yes No Community ID: CSS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP44, PP44 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.rtemisia californica S N 9. 2.socoma men iesii ar men iesii S N 10. 3.istichlis spicata H FACW 11. 4. 12. 5. 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 25 percent Remarks: Hydrophytic vegetation not dominant. HYDROLOGY Recorded Data (Described in Remarks): Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: -(in.) Drainage Patterns in Wetlands Depth to free Water in Pit -(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: -(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: No hydrology present. 181 □ □ 181 □ 181 ~ □ ~ □ □ □ □ □ □ □ □ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Salinas clay loam Drainage Class: Well drained, moderately well drained Field Observations Taxonomy (Subgroup): Calcic Pachic Haploxerolls Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-14 - 10YR 4/2 10YR 7/ 3 Loam Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Hydric soils present. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Data point located in Diegan coastal sage scrub. Approved by HQUSACE 3/92 181 □ □ □ □ □ □ □ □ □ ~ □ ~ □ □ ~ □ ~ ~ □ □ ~ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Dec , 2004 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Daylon L. Teel, onnie L. Peterson State:California Do normal circumstances exist on the site? Yes No Community ID: SWS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP45, PP45 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Salix lasiolepis T FACW 9. 2.ha la ifolia H L 10. 3. 11. 4. 12. 5. 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 100 percent Remarks: Hydrophytic vegetation dominant. HYDROLOGY Recorded Data (Described in Remarks): Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: 1 (in.) Drainage Patterns in Wetlands Depth to free Water in Pit -(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: -(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Hydrology present. 181 □ □ 181 □ 181 ~ □ ~ ~ □ ~ □ ~ ~ □ □ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Salinas clay loam Drainage Class: Well drained, moderately well drained Field Observations Taxonomy (Subgroup): Calcic Pachic Haploxerolls Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Due to inundation hydric soils assumed. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Data point located within an inundated drainage. Jurisdictional under ACOE and CDFG. Approved by HQUSACE 3/92 181 □ □ □ □ □ □ □ □ □ □ □ □ □ ~ □ ~ □ ~ □ ~ □ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Dec , 2004 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Daylon L. Teel, onnie L. Peterson State:California Do normal circumstances exist on the site? Yes No Community ID: SCL RF Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP46, PP46 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.uercus agrifolia T N 9. 2.Scirpus californicus H L 10. 3.Salix lasiolepis T FACW 11. 4.uncus acutus H FACW 12. 5.Salix goo ingii T L 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 0 percent Remarks: Hydrophytic vegetation dominant. HYDROLOGY Recorded Data (Described in Remarks): Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: 12 (in.) Drainage Patterns in Wetlands Depth to free Water in Pit -(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: -(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Hydrology present. 181 □ □ 181 □ 181 ~ □ ~ ~ □ □ □ □ ~ □ □ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Las Flores loamy fine sand Drainage Class: Moderately well drained Field Observations Taxonomy (Subgroup): Haplic Natrixeralfs Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Hydric soils assumed based on inundation. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Data point located within an inundated area under southern coast live oak riparian forest canopy. Jurisdictional under ACOE and CDFG. Approved by HQUSACE 3/92 181 □ □ □ □ □ □ □ □ □ □ □ □ □ ~ □ ~ □ ~ □ ~ □ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Dec , 2004 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Daylon L. Teel, onnie L. Peterson State:California Do normal circumstances exist on the site? Yes No Community ID: SCL RF Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: DP20 Is the area a potential Problem Area? Yes No Plot ID: DP47, PP47 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.uercus agrifolia T N 9. 2.eymus con ensatus H FAC 10. 3.ypha latifolia H L 11. 4.uncus acutus H FACW 12. 5.Salix lasiolepis T FACW 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 0 percent Remarks: Hydrophytic vegetation dominant. HYDROLOGY Recorded Data (Described in Remarks): Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: 2 (in.) Drainage Patterns in Wetlands Depth to free Water in Pit -(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: -(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Wetland hydrology present. 181 □ □ 181 □ 181 ~ □ ~ ~ □ □ □ □ □ □ ~ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Las Flores loamy fine sand Drainage Class: Moderately well drained Field Observations Taxonomy (Subgroup): Haplic Natrixeralfs Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Due to inundation hydric soils assumed. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Data point located within flowing water under the canopy of southern coast live oak riparian forest. Jurisdictional under ACOE (1 feet) and CDFG (3 feet). Approved by HQUSACE 3/92 181 □ □ □ □ □ □ □ □ □ □ □ □ □ ~ □ ~ □ ~ □ ~ □ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Dec , 2004 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Daylon L. Teel, onnie L. Peterson State:California Do normal circumstances exist on the site? Yes No Community ID: DH Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP4 , PP4 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1. 9. 2. 10. 3. 11. 4. 12. 5. 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 0 percent Remarks: Data point located within disturbed habitat, no vegetation present. HYDROLOGY Recorded Data (Described in Remarks): Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: 1 (in.) Drainage Patterns in Wetlands Depth to free Water in Pit -(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: -(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Hydrology present. 181 □ □ 181 □ 181 ~ □ ~ ~ □ ~ □ □ □ ~ ~ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Las Flores loamy fine sand Drainage Class: Moderately well drained Field Observations Taxonomy (Subgroup): Haplic Natrixeralfs Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-10 - 2.5Y 6/2 10YR 5/ 20 Sandy Loam Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Hydric soils present. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Data point located in non-wetland water of the U.S./streambed. Jurisdictional under ACOE (1 foot) and CDFG (15 feet). Approved by HQUSACE 3/92 181 □ □ □ □ □ □ □ □ □ □ □ ~ □ □ ~ ~ □ ~ □ □ ~ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Dec , 2004 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Daylon L. Teel, onnie L. Peterson State:California Do normal circumstances exist on the site? Yes No Community ID: SWS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP4 , PP4 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Salix lasiole is T FACW 9. 2. 10. 3. 11. 4. 12. 5. 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 100 percent Remarks: Hydrophytic vegetation dominant. HYDROLOGY Recorded Data (Described in Remarks): Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: 1 (in.) Drainage Patterns in Wetlands Depth to free Water in Pit -(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: -(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: Hydrology present. Data point located in drainage.. 181 □ □ 181 □ 181 ~ □ ~ ~ □ ~ □ □ ~ □ □ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Las Flores loamy fine sand Drainage Class: Moderately well drained Field Observations Taxonomy (Subgroup): Haplic Natrixeralfs Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Due to inundation hydric soils assumed. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Data point located in southern willow scrub. Jurisdictional under ACOE (6 feet) and CDFG (6 feet). Approved by HQUSACE 3/92 181 □ □ □ □ □ □ □ □ □ □ □ □ □ ~ □ ~ □ ~ □ ~ □ DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Lake Calavera Trails Date:Dec , 2004 Applicant/Owner: City of Carlsbad County: San Diego Investigator: Daylon L. Teel, onnie L. Peterson State:California Do normal circumstances exist on the site? Yes No Community ID: SWS Is the site significantly disturbed (Atypical Situation)? Yes No Transect ID: Is the area a potential Problem Area? Yes No Plot ID: DP50, PP50 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1.Salix lasiolepis T FACW 9. 2.10. 3.11. 4.12. 5.13. 6.14. 7.15. 8.16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 100 percent Remarks: Hydrophytic vegetation dominant. HYDROLOGY Recorded Data (Described in Remarks):Wetland Hydrology Indicators: Stream, Lake, or Tide Gauge Primary Indicators: Aerial Photographs Inundated Other Saturated in Upper 12 inches No Recorded Data Available Water Marks Drift Lines Field Observations: Sediment Deposits Depth of Surface Water: -(in.) Drainage Patterns in Wetlands Depth to free Water in Pit -(in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: -(in.) Oxidized Root Channels in Upper 12 Inches Water-Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Remarks: No hydrology present. 181 □ □ 181 □ 181 ~ □ ~ □ □ □ □ □ □ □ □ □ □ □ □ □ SOILS Map Unit Name (Series and Phase): Las Flores loamy fine sand Drainage Class: Moderately well drained Field Observations Taxonomy (Subgroup): Haplic Natrixeralfs Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon Matrix Color (Munsell Moist) Mottle Colors (Munsell Moist) Mottle (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-12 - 2.5Y 4/1 7.5Y 5/ 10 Silty Clay Loam Hydric Soil Indicators: Histosol Concretions Histic Epipedon High Organic Content in surface layer in Sandy Soils Sulfidic Odor Organic Streaking in Sandy Soils Aquic Moisture Regime Listed on Local Hydric Soils List Reducing Conditions Listed on National Hydric Soils List Gleyed or Low-Chroma Colors Other (Explain in Remarks) Remarks: Hydric soils present. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes No Wetland Hydrology Present? Yes No Hydric Soils Present? Yes No Is this Sampling Point Within a Wetland? Yes No Remarks: Data point located in southern willow scrub. Jurisdictional under CDFG as adjacent riparian. Approved by HQUSACE 3/92 181 □ □ □ □ □ □ □ □ □ □ □ ~ □ ~ □ □ ~ ~ □ □ ~ Lake Calavera Trails – Biological Resources Report Merkel & Associates, Inc. #04-101- APPENDIX 4. WETLAND PHOTO POINTS. Lake Calavera Trails – Biological Resources Report Merkel & Associates, Inc. #04-101-01 A-4-2 Data Point 1. Data Point located in southern willow scrub. Data Point 3. Data Point located in southern willow scrub. Data Point 5. Data Point located in southern willow scrub. Data Point 2. Data Point located in southern willow scrub. Data Point 4. Data Point located in Diegan coastal sage scrub. Data Point 6. Data Point located in mule fat scrub. Lake Calavera Trails – Biological Resources Report Merkel & Associates, Inc. #04-101-01 A-4-3 Data Point 7. Data Point located in southern willow scrub. Data Point 9. Data Point located in non-native grassland. Data Point 11. Data Point located in southern willow scrub. Data Point 8. Data Point located in southern willow scrub. Data Point 10. Data Point located in freshwater marsh. Data Point 12. Data Point located in Diegan coastal sage scrub. Lake Calavera Trails – Biological Resources Report Merkel & Associates, Inc. #04-101-01 A-4-4 Data Point 13. Data Point located in freshwater marsh. Data Point 15. Data Point located in freshwater marsh. Data Point 17. Data Point located in southern willow scrub. Data Point 14. Data Point located in mule fat scrub. Data Point 16. Data Point located in freshwater marsh. Data Point 18. Data Point located in southern willow scrub. Lake Calavera Trails – Biological Resources Report Merkel & Associates, Inc. #04-101-01 A-4-5 Data Point 19. Data Point located in cismontane alkali marsh. Data Point 21. Data Point located in non-wetland water of the U.S./streambed. Data Point 23. Data Point located in southern willow scrub. Data Point 20. Data Point located in southern willow scrub. Data Point 22. Data Point located in southern willow scrub. Data Point 24. Data Point located in southern willow scrub. Lake Calavera Trails – Biological Resources Report Merkel & Associates, Inc. #04-101-01 A-4-6 Data Point 25. Data Point located in non-wetland water of the U.S./streambed. Data Point 27. Data Point located in southern coast live oak riparian forest. Data Point 26. Data Point located in southern mixed chaparral. Lake Calavera Trails – Biological Resources Report Merkel & Associates, Inc. #04-101-01 A-4-7 Data Point 28. Data Point located in southern willow scrub. Data Point 30. Data Point located in southern willow scrub. Data Point 32. Data Point located in southern willow scrub. Data Point 29. Data Point located in southern willow scrub. Data Point 31. Data Point located in Diegan coastal sage scrub. Data Point 33. Data Point located in Diegan coastal sage scrub. Lake Calavera Trails – Biological Resources Report Merkel & Associates, Inc. #04-101-01 A-4-8 Data Point 34. Data Point located in disturbed wetland. Data Point 36. Data Point located in freshwater marsh. Data Point 38. Data Point located in Diegan coastal sage scrub. Data Point 35. Data Point located in southern willow scrub. Data Point 37. Data Point located in freshwater marsh. Data Point 39. Data Point located within a disturbed patch of southern willow scrub. Lake Calavera Trails – Biological Resources Report Merkel & Associates, Inc. #04-101-01 A-4-9 Data Point 40. Data Point located in Diegan coastal sage scrub. Data Point 42. Data Point located in southern coast live oak riparian forest. Data Point 44. Data Point located in Diegan coastal sage scrub. Data Point 41. Data Point located in Diegan coastal sage scrub. Data Point 43. Data Point located in cismontane alkali marsh. Data Point 45. Data Point located in southern willow scrub. Lake Calavera Trails – Biological Resources Report Merkel & Associates, Inc. #04-101-01 A-4-10 Data Point 46. Data Point located in southern coast live oak riparian forest. Data Point 48. Data Point located in non-wetland water of the U.S./streambed. Data Point 50. Data Point located in southern willow scrub. Data Point 47. Data Point located in southern coast live oak riparian forest. Data Point 49. Data Point located in southern willow scrub. Lake Calavera Trails – Biological Resources Report Merkel & Associates, Inc. #04-101-01 APPENDIX 5. FAUNA SPECIES OBSERVED OR DETECTED ON-SITE. Habitat Types: Dw = Disturbed Wetland S = Coastal Sage-Chaparral Scrub O = Open Water Cm = Southern Mixed Chaparral A = Cismontane Alkali Marsh Cc = Chamise Chaparral F = Coastal and Valley Freshwater Marsh N = Non-native Grassland R = Southern Coast Live Oak Riparian Forest X = Disturbed Habitat M = Mule Fat Scrub E = Non-native Vegetation W = Southern Willow Scrub U = Urban/Developed L = Coast Live Oak Woodland Fl = Fly Over V = Disturbed Valley Needlegrass Grassland Mo = Species found throughout majority of site D = Diegan Coastal Sage Scrub Abundance Codes: A = Abundant: Almost always encountered in moderate to large numbers in suitable habitat and the indicated season. C = Common: Usually encountered in proper habitat at the given season. U = Uncommon: Infrequently detected in suitable habitat. May occur in small numbers or only locally in the given season. R = Rare: Applies to species that are found in very low numbers. 'Numbers' indicate the number of individuals observed during the recent survey work. Status Codes (birds only): M = Migrant: Uses the site for brief periods of time, primarily during the spring and fall months. R = Year-round resident: Probable breeder on-site or in the vicinity. S = Spring/summer resident: Probable breeder on-site or in the vicinity unless combined with transient status. T = Transient: Uses site irregularly in summer but unlikely to breed. Not a true migrant and actual status often poorly known. W = Winter visitor: Does not breed locally. V = Casual vagrant: Not expected; out of normal geographic or seasonal range and by definition rare. * = denotes introduced species Lake Calavera Trails – Biological Resources Report Common Name Scientific Name Habitat Abundance Status Merkel & Associates, Inc. #04-101-01 A-5-2 CRUSTACEANS versatile fairy shrimp Branchinecta lindahli V,N,X --- --- BUTTERFLIES Pieridae (White, Orange-tip, and Sulfur Butterflies) cabbage white Pieris rapae Mo --- --- Lycaenidae (Hairstreak, Copper, and Blue Butterflies) western pigmy-blue Brephidium exile D,S,Cm --- --- Riodinidae (Metalmarks) Behr's metalmark Apodemia virgulti N --- --- Nymphalidae (Brush-footed Butterflies) mourning cloak Nymphalis antiopa W --- --- west coast lady Vanessa anabella D,N --- --- Lorquin's admiral Basilarchia lorquini W --- --- California sister Adelpha bredowii F,W,D --- --- common ringlet Coenonympha tuilla N --- --- monarch Danaus plexippus D,N --- --- queen Danaus gilippus W --- --- FISHES Poeciliidae (Livebearers) western mosquitofish Gambusia affinis F,W --- --- AMPHIBIANS Pelobatidae (Spadefoot Toads) western spadefoot Spea hammondii N,X --- --- Hylidae (Treefrogs and Relatives) Pacific chorus frog Pseudacris regilla F,M,W,D --- --- REPTILES Phrynosomatidae western fence lizard Sceloporus occidentalis D --- --- Colubridae (Colubrids) California kingsnake Lampropeltis getula californiae Cc --- --- Lake Calavera Trails – Biological Resources Report Common Name Scientific Name Habitat Abundance Status Merkel & Associates, Inc. #04-101-01 A-5-3 BIRDS Anatidae (Swans, Geese, and Ducks) domestic goose Anser domesticus O,F C --- Canada goose Branta canadensis O C W gadwall Anas strepera O C R, M, W American wigeon Anas americana O C M, W mallard Anas platyrhynchos O,F C R, M, W northern shoveler Anas clypeata O C M, W ruddy duck Oxyura jamaicensis O C R, M, W Phasianidae (Quails, Pheasants, and Relatives) California quail Callipepla californica D,Cm,Cc C R Podicipedidae (Grebes) pied-billed grebe Podilymbus podiceps O C R Phalacrocoracidae (Cormorants) double-crested cormorant Phalacrocorax auritus Fl C T, R Ardeidae (Herons and Bitterns) great blue heron Ardea herodias F C T, R great egret Ardea alba F,W C T, R Cathartidae (American Vultures) turkey vulture Cathartes aura Fl C T, R Accipitridae (Hawks and Harriers) white-tailed kite Elanus leucurus W,Fl C R northern harrier Circus cyaneus W U M, R sharp-shinned hawk Accipiter striatus D U W, M Cooper's hawk Accipiter cooperii R,W,L C M, R red-shouldered hawk Buteo lineatus Mo C R red-tailed hawk Buteo jamaicensis Fl,Mo C R, M, W Falconidae (Caracaras and Falcons) American kestrel Falco sparverius Fl C R Rallidae (Rails, Gallinules, and Coots) common moorhen Gallinula chloropus O,F C R American coot Fulica americana O,F A R, M, W Charadriidae (Plovers and Relatives) killdeer Charadrius vociferous F,N,X C R Columbidae (Pigeons and Doves) rock pigeon Columba livia Fl,Mo A R mourning dove Zenaida macroura Fl,Mo C R Lake Calavera Trails – Biological Resources Report Common Name Scientific Name Habitat Abundance Status Merkel & Associates, Inc. #04-101-01 A-5-4 Cuculidae (Typical Cuckoos) greater roadrunner Geococcyx californianus D U R Trochilidae (Hummingbirds) Anna's hummingbird Calypte anna Mo C R Alcedinidae (Kingfishers) belted kingfisher Ceryle alcyon F,W,O C M, W, R Picidae (Woodpeckers and Wrynecks) Nuttall's woodpecker Picoides nuttallii R,M,W,D C R downy woodpecker Picoides pubescens W U R northern flicker Colaptes auratus R,W C M, W, R Tyrannidae (Tyrant Flycatchers) olive-sided flycatcher Contopus cooperi W U M, S Pacific-slope flycatcher Empidonax difficilis W C M, S black phoebe Sayornis nigricans Mo C R Say's phoebe Sayornis saya D,N C W ash-throated flycatcher Myiarchus cinerascens W C M, S Cassin's kingbird Tyrannus vociferans W,D,S,X C R, M western kingbird Tyrannus verticalis Mo C M, S Laniidae (Shrikes) loggerhead shrike Lanius ludovicianus Cm U R Corvidae (Jays, Magpies, and Crows) western scrub-jay Aphelocoma californica Mo C R American crow Corvus brachyrhynchos Fl A R common raven Corvus corax Fl C R Hirundinidae (Swallows) northern rough-winged swallow Stelgidopteryx serripennis Fl C M, S cliff swallow Petrochelidon pyrrhonota Fl C M, S Aegithalidae (Bushtit) bushtit Psaltriparus minimus Mo C R Troglodytidae (Wrens) Bewick's wren Thryomanes bewickii D,L C R house wren Troglodytes aedon R,W,D C M, W, S Regulidae (Kinglets) ruby-crowned kinglet Regulus calendula R,D C M, W Sylviidae (Old World Warblers and Gnatcatchers) blue-gray gnatcatcher Polioptila caerulea W C M, W, S Lake Calavera Trails – Biological Resources Report Common Name Scientific Name Habitat Abundance Status Merkel & Associates, Inc. #04-101-01 A-5-5 coastal California gnatcatcher Polioptila californica californica D U R Turdidae (Bluebirds and Thrushes) hermit thrush Catharus guttatus R,W C M, W, S Timaliidae (Wrentit) wrentit Chamaea fasciata R,W,D,S C R Mimidae (Mockingbirds and Thrashers) northern mockingbird Mimus polyglottos W,D,S C R California thrasher Toxostoma redivivum D,S,Cm,Cc C R Motacillidae American (Water) Pipit Anthus rubescens (spinoletta)N --- --- Parulidae (Warblers) orange-crowned warbler Vermivora celata W C M, W, S yellow warbler Dendroica petechia W,E C M, S yellow-rumped warbler Dendroica coronata R,W,D,S,L C M, W, S common yellowthroat Geothlypis trichas W C M, R yellow-breasted chat Icteria virens W C M, S Emberizidae (Sparrows, Blackbirds and Relatives) spotted towhee Pipilo maculates D,S,Cm,Cc C R california towhee Pipilo crissalis Mo C R lark sparrow Chondestes grammacus D,V,N C W, S savannah sparrow Passerculus sandwichensis D,N,X C M, W song sparrow Melospiza melodia F,W,D A R white-crowned sparrow Zonotrichia leucophrys R,W,D,L C M, W Cardinalidae (Grosbeaks, Buntings, and Relatives) black-headed grosbeak Pheucticus melanocephalus W C M, S Icteridae (Blackbirds, Meadowlarks, Orioles, and Relatives) red-winged blackbird Agelaius phoeniceus F,W C R tricolored blackbird Agelaius tricolor W U R western meadowlark Sturnella neglecta Cc,N C R, W brown-headed cowbird Molothrus ater W C S, M, W Fringillidae (Finches) house finch Carpodacus mexicanus Mo A R lesser goldfinch Carduelis psaltria D,N,V,X C M, R American goldfinch Carduelis tristis R,W C M, R Lake Calavera Trails – Biological Resources Report Common Name Scientific Name Habitat Abundance Status Merkel & Associates, Inc. #04-101-01 A-5-6 MAMMALS Didelphidae (Opossums) Virginia oppossum Didelphis virginiana X --- --- Leporidae (Rabbits and Hares) brush rabbit Sylvilagus bachmani D --- --- desert cottontail Sylvilagus audubonii D,X --- --- Sciuridae (Squirrels, Chipmunks, and Marmots) California ground squirrel Spermophilus beecheyi D,X --- --- Geomyidae (Pocket Gophers) Botta's pocket gopher Thomomys bottae D,N --- --- Muridae (Rats, mice, and voles) western harvest mouse Reithrodontomys megalotis X --- --- woodrat Neotoma sp. W --- --- Canidae (Foxes, Wolves, and Relatives) coyote Canis latrans X --- --- domestic dog Canis familiaris X --- --- Procyonidae (Raccoons and Relatives) northern raccoon Procyon lotor W,D,X --- --- Mustelidae (Weasels, Badgers, and Relatives) striped skunk Mephitis mephitis X --- ---