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Home My WebLink AboutCT 15-01; Cascada Verde; Jurisdictional Delineation Report; 2013-05-01JURISDICTIONAL DELINEATION REPORT IKON LIMITED-CARLSBAD PARCEL CITY OF CARLSBAD SAN DIEGO COUNTY, CALIFORNIA Prepared for: Ikon Limited 2633 South Fairfax A venue Culver City, California 90232 (310) 837-2633 Prepared by: LSA Associates, Inc. 703 Palomar Airport Road, Suite 260 Carlsbad, California 9201 I (760) 931-5471 LSA Project No. IKNJ301 L SA May 2013 _j LSA ASSOCIATES, INC. MAY201~ TABLE OF CONTENTS JURISDICTIONAL DELINEATION IKON LIMITED -CARLSBAD PARCEL CARLSBAD, CALIFORNIA INTRODUCTION .................................................................................................................................. 1 PROPOSED PROJECT .......................................................................................................................... 1 SITE DESCRIPTION ............................................................................................................................. 1 REGULATORY BACKGROUND ........................................................................................................ 3 United States Army Corps of Engineers .......................................................................................... 3 Wetlands .......................................................................................................................................... 5 California Department of Fish and Wildlife .................................................................................... 7 Regional Water Quality Control Board ........................................................................................... 8 METHODOLOGY ................................................................................................................................. 8 RESULTS .................................................................................................... oo ......................................... 8 Vegetation .............. 000000 ••••••••••••• 000 00 00 •••••• 000000000 00000 •••• 00 .... oo ........ 00 •••••••••• 000 00 ••• 00 ••• 00 •• 00 ••• 00 •• 00.00 ••••••••••••• 9 Soils ....................................................................................... 00 •••••••••••••••••••••••••••••••••••••••••••••••••••••••• 9 Hydrology oo············oooo·······oo····oooooooo········ooooooooooooooooooooooooo ..... oo.oooo··•oooooooooooo•····oo· .. oo·······oo··············l3 CONCLUSIONS ...... oo .......... oooo•••oooooooooo··········oo··········oo•oooooo•••ooooooooooooooooooooooooooooo··········oo••oooooooooo•·······13 Potential Corps and RWQCB Jurisdictionoo ......... oooooooooooooooooooo••••oooooooo•····ooooooo••oooooo•••ooooooooooooooooo .. l3 Potential CDFW Jurisdiction .. oooo•••oooooooooooooo·····•oooooo•·····oo•oooooooo•oo••oo•·····oooooooooooooooo•oo········oo·••oooo .... l4 REFERENCES 000 000 .... 00 00. oo·. 000.000000 00 ••••• 0000 0000 •• 000.00 00.00 000 •••••••••• 0000 •••••••• 0000000 •••••••• 00 000000000000 •••••••••• 000000000000 15 FIGURES Figure 1: Project Location ............ 00 oooooo ........... 00 0000 ••• 00000.000 0000000 ••• 00.0000 •••••• 00 0000 00000 •••• 00.000 00 00 •••• 000000 ••••••••••• 2 Figure 2: Potential Corps and CDFW Jurisdictional Areasooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo.IO Figure 3: Site Photographs oooooooooooooooooooooooooo.oo•oo·········•ooooooooooooooooooooooooooooooooooooooooo··········oooooooooooooooooooooo 11 TABLES Table A: Hydrophytic Vegetation .. 00000 00 ••••••••• oooooooo ........ oo• 00 •••••••••• oo• .................. oo• 00 oo•. 00 ••••••••• oo• .... 00.0000 •• 6 Table B: Potential Corps and RWQCB Jurisdictional Waters of the U.S.oooooooooooooooooooooooooooooooooooooooooo.l4 Table C: Potential CDFW Jurisdictionoooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo.l4 APPENDICES A: COPY OF WETLAND DATA FORMS B: FUNCTION AND VALUES ANALYSIS P:\IKN 1301-Ikon \JD\JD _Report.docx <<5/23/20 13 >> LSA ASSOCIATES, INC. MAY2013 JURISDICTIONAL DELINEATION IKON LIMITED -CARLSBAD PARCEL CARLSBAD, CALIFORNIA INTRODUCTION This report presents the results of a jurisdictional delineation conducted by LSA Associates, Inc. (LSA). The report summarizes the results of fieldwork conducted to identify the limits of potential wetlands and non wetland waters of the United States subject to the jurisdiction of the United States Army Corps of Engineers (Corps) and Regional Water Quality Control Board (RWQCB) pursuant to Sections 404 and 401 of the Federal Clean Water Act, respectively; and streambeds, water bodies, and associated habitat subject to California Department of Fish and Wildlife (CDFW) regulation pursuant to the California Fish and Game Code. LSA surveyed an approximately 3-acre study area located in the City of Carlsbad, San Diego County, California (Figure 1). This report has been prepared for use by Ikon Limited for purposes of identifying aquatic resource limits for design consideration with the intent of minimizing and avoiding impacts to aquatic resources to the greatest extent feasible, and for submittal to the Corps, CDFW, and RWQCB as part of their review of applications for permit authorization, if project impacts trigger the need for such permits. This routine wetland and jurisdictional delineation was conducted under contract with Ikon Limited. The findings and conclusions presented in this report, including the location and extent of aquatic resources subject to regulatory jurisdiction, represent the professional opinion of LSA and should be considered preliminary until verified by representatives of the Corps, CDFW, and RWQCB. PROPOSED PROJECT No project has been proposed at this time. Ikon Limited contracted LSA to assess the study area to identify potential natural resources constraints that would affect future development of the site. SITE DESCRIPTION The study area is located within the South Coast subregion of the Southwestern California region of the California Floristic Province, characterized by valleys and small hills extending from the coast inland to the foothills ofthe Transverse and Peninsular Mountain ranges. Specifically, the project is located in Sections 25 and 36, Township 12 South, and Range 4 West, of the United States Geological Survey (USGS) Encinitas, California 7.5-minute topographic quadrangle map. The study area is located within a canyon north of Alicante Road, between Altisma Way and Altiva Place in Carlsbad, California. The majority of the study area consists of riparian woodland. Eucalyptus (Eucalyptus sp.) woodland; previously disturbed areas dominated by nonnative annual vegetation; coastal sage scrub; and a small patch of native grassland are also present within the study area. The study area is located within the Carlsbad Hydrologic Unit (HU) (Carlsbad Watershed), which is approximately 210 square miles extending from the headwaters above Lake Wolhford in the east to the Pacific Ocean in the west, and from Vista and Oceanside in the north to Solana Beach, Escondido, and the community of Rancho Santa Fe to the south. The Cities of Carlsbad, San Marcos, and Encinitas are entirely within this watershed. There are numerous important surface hydrologic features within the Carlsbad Watershed, including four unique coastal lagoons, three major creeks, and two large water storage reservoirs. The HU contains four major, roughly parallel hydrologic areas P:\IKN!301-Ikon\JD\JD _Report.docx <<5/23/20 13>> 1 I I I L SA LEGEND c:J Project Location I 1000 2000 FEET SOURCE: USGS 7.5' Quad. (Encinitas, 1975; Rancho Santa Fe, 1983) 1:\IKN 130 1\GIS\ProjectLocation.mxd (5/1 0/2013) FIGURE I Ikon Limited-Carlsbad Parcel Project Location LSA ASSOCIATES, INC. MAY 201g JURISDICTIONAL DELINEATION IKON LIMITED -CARLSBAD PARCEL CARLSBAD, CALIFORNIA (HAs). Encompassing the study area is the San Marcos (904.2) HA and the Batiquitos hydrologic subarea (HSA) according to the Water Quality Control Plan for the San Diego Basin -Region 9 (State of California 2007). The average annual rainfall for the study area is approximately 11.13 inches.' REGULATORY BACKGROUND United States Army Corps of Engineers The Corps regulates discharges of dredged or fill material into waters of the United States. These waters include wetland and non wetland bodies of water that meet specific criteria. Corps regulatory jurisdiction pursuant to Section 404 of the CW A is founded on a connection, or nexus, between the water body in question and interstate commerce. This connection may be direct (through a tributary system linking a stream channel with traditional navigable waters used in interstate or foreign commerce) or may be indirect (through a nexus identified in the Corps regulations). The following definition of waters of the United States is taken from the discussion provided at 33 Code of Federal Regulations (CPR) 328.3: "The term waters of the United States means: (1) All waters which are currently used, or were used in the past, or may be susceptible to use in interstate or foreign commerce ... ; (2) All interstate waters including interstate wetlands; (3) All other waters such as intrastate lakes, rivers, streams (including intermittent streams) ... the use, degradation or destruction of which could affect interstate or foreign commerce ... ; ( 4) All impoundments of waters otherwise defined as waters of the United States under the definition; and (5) Tributaries of waters defined in paragraphs (a) (1)-(4) of this section." The Corps typically regulates as waters of the United States a body of water displaying an ordinary high water mark (OHWM). Corps jurisdiction over nontidal waters of the United States extends laterally to the OHWM or beyond the OHWM to the limit of any adjacent wetlands, if present (33 CPR 328.4). The OHWM is defined as "that line on the shore established by the fluctuations of water and indicated by physical characteristics such as a 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 area" (33 CPR 328.3). Jurisdiction typically extends upstream to the point where the OHWM is no longer perceptible. As discussed above, Corps regulatory jurisdiction under Section 404 of the CW A is founded on a connection between the water body in question and interstate commerce. In the past, an indirect nexus could potentially be established if isolated waters provided habitat for migratory birds, even in the absence of a surface connection to a navigable water of the United States. The 1984 rule that enabled the Corps to expand jurisdiction over isolated waters of this type became known as the Migratory http://www.idcide.com/weather/ca!carlsbad.htm, May, 21, 2013. P:\IKN 130 1-Ikon\JD\JD _Report.docx «5123120 13>> 3 __ j LSA ASSOCIATES, INC. MAY 2013 JURISDICTIONAL DELINEATION IKON LIMITED -CARLSBAD PARCEL CARLSBAD, CALIFORNIA Bird Rule. However, on January 9, 2001, the United States Supreme Court narrowly limited Corps jurisdiction of "nonnavigable, isolated, intrastate" waters based solely on the use of such waters by migratory birds and particularly, the use of indirect indicators of interstate commerce (e.g., use by migratory birds that cross state lines) as a basis for jurisdiction. The Court's ruling derives from the case Solid Waste Agency of Northern Cook County v. U.S. Army Corps of Engineers, No. 99-1178 (SW ANCC). The Supreme Court determined that the Corps exceeded its statutory authority by asserting CWAjurisdiction over an abandoned sand and gravel pit in northern Illinois, which provides habitat for migratory birds. In 2006, the United States Supreme Court further considered Corps jurisdiction of "waters of the United States" in the consolidated cases Rapanos v. United States and Carabell v. United States (126 S. Ct. 2208), collectively referred to as Rapanos. The Supreme Court concluded that wetlands are "waters of the United States" if they significantly affect the chemical, physical, and biological integrity of other covered waters more readily understood as navigable. On June 5, 2007, the Corps issued guidance regarding the Rapanos decision. This guidance states that the Corps will continue to assert jurisdiction over traditional navigable waters, wetlands adjacent to traditional navigable waters, relatively permanent non-navigable tributaries that have a continuous flow at least seasonally (typically three months), and wetlands that abut relatively permanent tributaries. The Corps will determine jurisdiction over wa~ers that are non-navigable tributaries that are not relatively permanent and wetlands adjacent to non-navigabletributaries that are not relatively permanent only after making a significant nexus finding. Furthermore, the preamble to Corps regulations (Preamble Section 328.3, Definitions) states that the Corps does not generally consider the following waters to be waters of the U.S. The Corps does, however, reserve the right to regulate these waters on a case-by-case basis. • Nontidal drainage and irrigation ditches excavated on dry land; • Artificially irrigated areas that would revert to upland if the irrigation ceased; • Artificial lakes or ponds created by excavating and/or diking dry land to collect and retain water and which are used exclusively for such purposes as stock watering, irrigation, settling basins, or rice growing; • Artificial reflecting or swimming pools or other small ornamental bodies of water created by excavating and/or diking dry land to retain water for primarily aesthetic reasons; and • Water-filled depressions created in dry land incidental to construction activity and pits excavated in dry land for purposes of obtaining fill, sand, or gravel unless and until the construction or excavation operation is abandoned and the resulting body of water meets the definition of waters of the U.S. Waters found to be isolated and not subject to CWA regulation are often still regulated by the Regional Water Quality Control Board (RWQCB) under the State Porter-Cologne Water Quality Control AcL(Porter-Cologne Act). P:\IKN 130 1-Ikon\JD\JD _Report.docx <<5/23/20 13>> 4 __ / LSA ASSOCIATES, INC. MAY2013 JURISDICTIONAL DELINEATION IKON LIMITED -CARLSBAD PARCEL CARLSBAD, CALIFORNIA Wetlands Wetland delineations for Section 404 purposes must be conducted according to the Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Arid West Region (Version 2.0) (Regional Supplement) (Corps 2008) and the Corps of Engineers 1987 Wetland Delineation Manual (1987 Manual) (Environmental Laboratory 1987). Where there are differences between the two documents, the Regional Supplement takes precedence over the 1987 Manual. The Corps and United States Environmental Protection Agency (EPA) define wetlands as follows: "Those areas that are inundated or saturated by surface or groundwater at a frequency and duration sufficient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted to life in saturated soil conditions." In order to be considered a jurisdictional wetland under Section 404, an area must possess three wetland characteristics: hydrophytic vegetation, hydric soils, and wetland hydrology. Each characteristic has a specific set of mandatory wetland criteria that must be satisfied in order for that particular wetland characteristic to be met. Several indicators may be analyzed to determine whether the criteria are satisfied. Hydrophytic vegetation and hydric soils indicators provide evidence that episodes of inundation have lasted more than a few days or have occurred repeatedly over a period of years, but do not confirm that an episode has occurred recently. Conversely, wetland hydrology indicators provide evidence that an episode of inundation or soil saturation occurred recently, but do not provide evidence that episodes have lasted more than a few days or have occurred repeatedly over a period of years. Because of this, if an area lacks one of the three characteristics under normal circumstances, the area is considered nonwetland under most circumstances. Determination of wetland limits may be obfuscated by a variety of natural environmental factors or human activities, collectively called difficult wetland situations, including cyclic periods of drought and flooding or highly ephemeral stream systems. During periods of drought, for example, bank return flows are reduced and water tables are lowered. This results in a corresponding lowering of ordinary high water and invasion of upland plant species into wetland areas. Conversely, extreme flooding may create physical evidence of high water well above what might be considered ordinary and may allow the temporary invasion of hydrophytic species into nonwetland areas. In highly ephemeral systems typical of southern California, these problems are encountered frequently. In these situations, professional judgment based on years of practical experience and extensive knowledge of local ecological conditions comes into play in delineating wetlands. The Regional Supplement provides additional guidance for difficult wetland situations. Hydrophytic Vegetation. Hydrophytic vegetation is plant life that grows and is typically adapted for life in permanently or periodically saturated soils. The hydrophytic vegetation criterion is met if more than 50 percent of the dominant plant species from all strata (tree, shrub, herb, and woody vine layers) are considered hydrophytic. Hydrophytic species are those included on the National Wetland Plant List (Lichvar and Kartesz 2009), published by the Corps. Each species on the list is rated according to a wetland indicator category, as shown in Table A. To be considered hydrophytic, the species must have wetland indicator status (i.e., be rated as OBL, FACW, or FAC). P:\IKNI301-Ikon\JD\JD _Report.docx <<5/23/2013» 5 _j LSA ASSOCIATES, INC. MAY 2013 JURISDICTIONAL DELINEATION IKON LIMITED -CARLSBAD PARCEL CARLSBAD, CALIFORNIA Table A: Hydrophytic Vegetation Category Probability Obligate Wetland OBL Almost always occur in wetlands (estimated probability> 99%) Facultative FACW Usually occur in wetlands (estimated probability 67-99%) Wetland Facultative FAC Equally likely to occur in wetlands and non wetlands (estimated probability 34- 66%) Facultative Upland FACU Usually occur in non wetlands (estimated probability 67-99%) Obligate Upland UPL Almost always occur in nonwetlands (estimated probability> 99%) The delineation of hydrophytic vegetation is typically based on the most dominant species from each vegetative stratum (strata are considered separately); when more than 50 percent of these dominant species are hydrophytic (i.e., FAC, FACW, or OBL), the vegetation is considered hydrophyt:ic. In particular, the Corps recommends the use of the "50/20" rule (also known as the dominance test) from the Regional Supplement for determining dominant species. Under this method, dominant species are the most abundant species that immediately exceed 50 percent of the total dominance measure for the stratum, plus any additional species comprising 20 percent or more of the total dominance measure for the stratum. In cases where indicators of hydric soil and wetland hydrology are present but the vegetation initially fails the dominance test, the prevalence index must be used. The prevalence index is a weighted average of all plant species within a sampling plot. The prevalence index is particularly useful when communities only have one or two dominants, where species are present at roughly equal coverage, or when strata differ greatly in total plant cover. In addition, Corps guidance provides that morphological adaptations may be considered when determining hydrophytic vegetation when indicators of hydric soil and wetland hydrology are present (Corps 2006). If the plant community passes either the dominance test or prevalence index after reconsidering the indicator status of any plant species that exhibit morphological adaptations for life in wetlands, then the vegetation is considered hydrophytic. Hydric Soils.1 Hydric soils are defined as soils that formed under conditions of saturation, flooding, or ponding long enough during the growing season to develop anaerobic conditions in the upper part.2 Soils are considered likely to meet the definition of a hydric soil when one or more of the following criteria are met: 1. All Histels except Folistels and Histosols except Folists; or 2. Soils that are frequently ponded for long duration or very long duration3 during the growing season; or 3. Soils that are frequently flooded for long duration or very long duration during the growing season. The hydric soil definition and criteria included in the 1987 Manual are obsolete. Users of the Manual are directed to the United States Department of Agriculture (USDA) Natural Resources Conservation Service Web site for the most current information on hydric soils. Current definition as of 1994 (FR July 13, 1994). Long duration is defined as a single event ranging from 7 to 30 days; very long duration is defined as a single event that lasts longer than 30 days. P:\IKN 130 1-Jkon\JD\JD _Report.docx <<5/23/20 13>> 6 _i LSA ASSOCIATES, INC. MAY 2013 JURISDICTIONAL DELINEATION IKON LIMITED -CARLSBAD PARCEL CARLSBAD, CALIFORNIA Hydric soils develop under conditions of saturation and inundation combined with microbial activity in the soil that causes a depletion of oxygen. While saturation may occur at any time of year, microbial activity is limited to the growing season, when soil temperature is above biologic zero (the soil temperature at a depth of 50 centimeters (em), below which the growth and function of locally adapted plants are negligible). Biogeochemical processes that occur under anaerobic conditions during the growing season result in the distinctive morphologic characteristics of hydric soils. Based on these criteria, a National List of Hydric Soils was created from the National Soil Information System (NASIS) database and is updated annually. The Regional Supplement has a number of field indicators that may be used to identify hydric soils. Natural Resources Conservation Service (NRCS) (2003) has also developed a number of field indicators that may demonstrate the presence of hydric soils. These indicators include hydrogen sulfide generation, accumulation of organic matter, and the reduction, translocation and/or accumulation of iron and other reducible elements. These processes result in soil characteristics that persist during both wet and dry periods. Separate indicators have been developed for sandy soils and for loamy and clayey soils. Wetland Hydrology. Under natural conditions, development of hydrophytic vegetation and hydric soils are dependent on a third characteristic: wetland hydrology. Areas with wetland hydrology are those where the presence of water has an overriding influence on vegetation and soil characteristics due to anaerobic and reducing conditions, respectively (Environmental Laboratory 1987). The wetland hydrology parameter is satisfied if the area is seasonally inundated or saturated to the surface for a minimum of 14 consecutive days during the growing season in most years (Corps 2008). Hydrology is often the most difficult criterion to measure in the field due to seasonal and annual variations in water availability. Some of the indicators that are commonly used to identify wetland hydrology include visual observation of inundation or saturation, watermarks, recent sediment deposits, surface scour, and oxidized root channels (rhizospheres) resulting from prolonged anaerobic conditions. California Department of Fish and Wildlife The CDFW, through provisions ofthe California Fish and Game Code (Sec. 1600 et seq.), is empowered to issue agreements for any alteration of a river, stream, or lake where fish or wildlife resources may be adversely affected. Streams (and rivers) are defined by the presence of a channel bed and banks and at least an intermittent flow of water. The CDFW regulates wetland areas only to the extent that those wetlands are part of a river, stream, or lake as defined by the CDFW. Also, the CDFW typically does not regulate estuaries below the mouth of a tributary river or stream. In obtaining CDFW agreements, the limits of wetlands are not typically determined. The reason for this is that the CDFW generally includes, within the jurisdictional limits of streams and lakes, any riparian habitat present. Riparian habitat includes willows, mule fat, and other vegetation typically associated with the banks of a stream or lake shorelines and may not be consistent with Corps definitions. In most situations, wetlands associated with a stream or lake would fall within the limits of riparian habitat. Thus, defining the limits of CDFW jurisdiction based on riparian habitat will automatically include any wetland areas and may include additional areas that do not meet Corps P:\IKN 1301-Ikon \JD\JD _Report.docx <<5/23/20 13 >> 7 --~~ LSA ASSOCIATES, INC. MAY201S JURISDICTIONAL DELINEATION IKON LIMITED -CARLSBAD PARCEL CARLSBAD, CALIFORNIA criteria for soils and/or hydrology (e.g., where riparian woodland canopy extends beyond the banks of a stream away from frequently saturated soils). Regional Water Quality Control Board The RWQCB is responsible for the administration of Section 401 of the CW A and the California Water Code Porter-Cologne Water Quality Control Act (Water Code Section 13260). Section 401 of the CW A specifies that certification from the State is required for any applicant requesting a Federal license or permit to conduct any activity including, but not limited to, the construction or operation of facilities that may result in any discharge into navigable waters. The Porter-Cologne Act requires "any person discharging waste, or proposing to discharge waste, within any region that could affect the waters of the State" to file a report of discharge. Typically, the areas subject to RWQCB jurisdiction coincide with those of the Corps (i.e., waters of the U.S., including any wetlands). METHODOLOGY LSA biologists Dan Rosie and Jaime Morales performed the jurisdictional delineation fieldwork on May 7, 2013. LSA prepared a field map of the area to be surveyed using a 2012 aerial photograph base at a scale of 1 inch = 80 feet. The study area was surveyed on foot, and all areas of potential jurisdiction were evaluated according to Corps and CDFW criteria. Data were recorded using a Global Positioning System (GPS) unit with sub-meter accuracy and directly on the field map, particularly where GPS reception was limited due to dense tree canopies. LSA evaluated areas suppoiting hydrology or species of plant life potentially indicative of wetlands according to routine wetland delineation procedures described in the Regional Supplement. Representative sample points were selected and examined in the field in those areas where wetland jurisdiction was in question or needed to be confirmed. At each sample point, the dominant and subdominant plant species were identified and their wetland indicator status (Lichvar and Kartesz 2009) noted. A small sample pit (approximately 12-20 inches deep) was dug at each point in order to examine soil characteristics and composition. Soil matrix colors were classified according to the Munsell Soil Color Charts (Munsell Color 2000). Hydrological conditions, including any surface inundation, saturated soils, groundwater levels, and/or other wetland hydrology indicators, were recorded. General site characteristics were also noted. Standard data forms were completed for each sample point; copies of these data forms are included in Appendix A of this report. RESULTS Within the study area, there is an unnamed intermittent stream course that conveys flows from north to south through a canyon surrounded to the west, south, and east by residential development. The drainage conveys flows in the northern portion of the study area via a natural channel to an elevated earthen road crossing that includes a 36-inch diameter culvert. The drainage in the southern portion of the study area consists of various previously-excavated braids that channelize most flows to a 48-inch diameter culvert at Alicante Road and into the local storm drain system. In the southern portion of the site, there are several culvert outlets, presumably storm drain outlets, that provide additional water P: \IKN 1301-Ikon\JD\JD _Report.docx <<5/23/20 13» 8 __j _ _) _j __ j LSA ASSOCIATES, INC. MAY 201g JURISDICTIONAL DELINEATION IK-ON LIMITED -CARLSBAD PARCEL CARLSBAD, CALIFORNIA sources which support the wetlands hydrology. Remnant developed areas such as brick flooring, retaining walls, fire pits, and awnings are scattered throughout the southern portion of the study area. The stream course, presumably through the local storm drain system, is tributary to San Marcos Creek, Batiquitos Lagoon, and ultimately the Pacific Ocean (a Traditional Navigable Water [TNW] of the U.S.). Because of the direct connection with the Pacific Ocean, this feature is subject to Corps jurisdiction to the OHWM and adjacent wetlands. The entire area mapped as wetlands meets all three criteria for wetland waters of the U.S.: wetland hydrology, hydric soils, and dominance of hydrophytic plant species. Riparian woodland vegetation associated with this drainage feature, including streambed and banks, is subject to CDFW jurisdiction. The study area is not within the 100-year floodplain. Functions and values for this feature were determined to have a moderate to high significance in terms of resources. Figure 2 depicts the location of this feature and Figure 3 shows site conditions. The wetland data forms (Appendix A) contain full descriptions of the results of each sample point. Appendix B describes and evaluates the functions and values of the feature within the study area. Vegetation There is a variety of vegetation communities located within the study area, including ornamental vegetation, disturbed areas, developed areas, coastal sage scrub, native grassland, nonnative grassland, eucalyptus woodland, and riparian woodland. Some ruderal forbs and annual nonnative grasses occur throughout most of these communities. The hydrophytic vegetation criterion for Corps jurisdictional wetlands is satisfied when there is a prevalence of wetland vegetation. Areas identified in this report as wetlands are dominated by wetland vegetation and are subject to Corps and CDFW jurisdiction. Riparian woodland vegetation associated with this drainage feature is subject to CDFW jurisdiction. Wetland vegetation within the drainage and on the surrounding terraces primarily includes canopies of arroyo willow (Salix lasiolepis, FACW) and Brazilian pepper tree (Schinus terebinthifolius, FAC), with sand bar willow (Salix exigua, FACW), yellow iris (Iris pseudacorus, OBL), yerba mansa (Anemopsis californica, OBL), wild celery (Apium graveolens), broadleaf cattail (Typha latifolia, OBL), and San Diego marsh-elder (Iva hayesiana, FACW) dominating the understory. Soils The Soil Survey for the San Diego Area, California, Part I (Soil Conservation Service 1973) Encinitas, California quadrangle identifies and describes the soil expected to correspond to the drainage within the study area as Exchequer rocky silt loam on 9 to 30 percent slopes (ExE), a well- drained silt loam that formed in material weathered from hard metabasic rock. Salina clay loam on 2 to 9 percent slopes (SbC) is mapped in the southwestern corner of the study area. Due to various disturbances within the study area as a result of development and other activities, soils as observed during the surveys were varied and partially inconsistent with the soil survey. P:\IKN 1301-Ikon \JD\ID _Report.docx <<5/23/20 13 » 9 L SA $ 40 80 FEET --- LEGEND c:J StudyArea 0 Soil Pit ~ CDFG Streambed/Banks and Riparian Vegetation -Corps Wetland Waters of the U.S. SOURCE: Aerial-City of Carlsbad (2/20 12) I:\IKNI30 1\GISVD_Map.mxd (S/20/2013) -- ------ - Ikon Limited-Carlsbad Parcel Potentially Jurisdictional Areas - PHOTOGRAPH 1: View of riparian woodland associated with the drainage, facing west. Non-jurisdictional eucalyptus woodland is shown in the background. PHOTOGRAPH 3: View of the southern border of the study area, facing south. L S 1\ 1:\IKN 1301\G\Sitc_Photos-1&2.cdr (5/21/13) PHOTOGRAPH 2: View of one of the channelized braids, facing south. PHOTOGRAPH 4: View of a remnant developed area located near the southern end of the study area, facing north. The ground is covered with brick, inhibiting the growth of vegetation. FIGURE 3 Sheet I of2 Ikon Limited-Carlsbad Parcel Site Photographs PHOTOGRAPH 5: View of a remnant developed area (see awning) located in the southern portion portion of the study area, facing southwest. PHOTOGRAPH 7: View of Soil Pit2,facing northeast. L SA 1:\IKN 1301\G\Sitc_Photos-1&2.cdr (5/21/13) PHOTOGRAPH 6: ViewofSoi/ Pitl,facingeast. PHOTOGRAPH 8: View of Soil Pit 3Jacing northwest. FIGURE 3 Sheet 2 of2 Ikon Limited-Carlsbad Parcel Site Photographs _ _j _j __ I LSA ASSOCIATES, INC. MAY 2013 JURISDICTIONAL DELINEATION IKON LIMITED -CARLSBAD PARCEL CARLSBAD, CALIFORNIA Sample plots were taken within the study area above and below the observed OHWM where wetland vegetation was predominant to identify the limits of potential jurisdictional areas. Previously referenced Figure 2 depicts the locations of the sample plots. Soil Pit (SP) 1 was dug in riparian woodland vegetation on a terrace located adjacent to two braided channels that converge at the southern end of the study area. Soils within the pit primarily consisted ofsilty clay. The profile at this location includes a layer that is approximately six inches thick, with 100 percent of the matrix composed of the correct combination of hue, value, and chroma (Munsel moist 5YR 2.5/2) to meet the hydric soils indicator Depleted Matrix (F3) as outlined in the Regional Supplement. These SP data were extrapolated for all locations within the study area consisting of riparian woodland dominated by arroyo willow and yerba mansa, since this was the dominant vegetation at SP 1. SP 2 was dug in disturbed riparian woodland vegetation on a terrace upstream of SP 1. Soils at this location were predominantly made up of silty clay loam. The profile at this location includes alternating layers that are at least 12 inches thick. Approximately 40 percent of the matrix in each alternating layer was composed of the correct combination of hue, value, and chroma (Munsell moist 5YR 3.511 and 5YR 611), each with approximately 10 percent distinct redox concentrations occurring as soft masses in the matrices, to meet the hydric soils indicators Depleted Matrix (F3) and Redox Dark Surface (F6) as outlined in the Regional Supplement. These SP data were extrapolated for all locations within the study area consisting of disturbed riparian woodland dominated by Brazilian pepper tree and yellow iris, since this was the dominant vegetation at SP 2. SP 3, which was dug northeast of SP 2 just outside of areas including a hydrophytic understory, was predominantly made up of sandy clay. SP 3 did not meet any hydric soils indicators as outlined in the Regional Supplement, but did show relic hydric soil conditions with approximately 5 percent redox concentrations occurring as soft masses and pore linings in the sandy clay layer at least 12 inches from the surface, but with 95 percent ofthe matrix with a high chroma (Munsell moist lOYR 4/4). All locations within the study area absent of a predominantly hydrophytic understory are not considered wetlands. Hydrology Wetland hydrology was evident within the braided channels and throughout the associated terraces. The following wetland hydrology indicators were observed: surface water (Al; a primary wetland hydrology indicator described in the Regional Supplement), saturated soils (primary indicator A3), oxidized rhizosperes along living roots (primary indicator C3), the presence of reduced iron (primary indicator C4), drift deposits (secondary indicator B3), and drainage patterns (secondary indicator BlO). CONCLUSIONS Potential Corps and RWQCB Jurisdiction The drainage has a direct connection to designated navigable waters of the U.S. The majority of the riparian corridor meets the three parameters to be considered wetland waters of the U.S. by the Corps. See Table B. P:\IKN 1301-Ikon\JD\JD _Report.docx <<5/23/2013>> 13 -_I I -_, __ j LSA ASSOCIATES, INC. MAY 2013 JURISDICTIONAL DELINEATION IKON LIMITED -CARLSBAD PARCEL CARLSBAD, CALIFORNIA Table B: Potential Corps and RWQCB Jurisdictional Waters of the U.S. Linear Wetland Waters Non-Wetland Total Corps Feature Feet (Acres) Waters (Acres) Jurisdiction (Acres) Drainage and 766 1.00 0 1.00 Associated Terraces Potential CDFW Jurisdiction The drainage consists of riparian woodland habitat tributary to Batiquitos Lagoon and therefore is potentially subject to CDFW jurisdiction. See Table C. Table C: Potential CDFW Jurisdiction Streambed/Banks and Riparian Vegetation Total CDFW Jurisdiction Feature (Acres) (Acres) Drainage and Associated 1.56 1.56 Terraces P:\IKN 1 301 -Ikon\JD\JD _Report.docx <<5/23/2013» 14 _ _j LSA ASSOCIATES, INC. MAY 2013 REFERENCES JURISDICTIONAL DELINEATION IKON LIMITED -CARLSBAD PARCEL CARLSBAD, CALIFORNIA California Coastal Commission. 1981 (rev. ed.). Statewide Interpretive Guidelines. Environmental Laboratory. 1987. Corps of Engineers Wetlands Delineation Manual. Technical Report Y-87-1. United States Army Engineer Waterways Experiment Station, Vicksburg, MS. Federal Interagency Committee for Wetland Delineation. 1989. Federal Manual for Identifying and Delineating Jurisdictional Wetlands. United States Army Corps of Engineers, United States Environmental Protection Agency, United States Fish and Wildlife Service, and United States Department of Agriculture Soil Conservation Service, Washington, D.C. Cooperative Technical publication. 76 pp. plus appendices. Hickman, J.C., ed. 1993. The Jepson Manual: Higher Plants of California. University of California Press, Berkeley and Los Angeles, CA. 1,400 pp. Lichvar, R.W., and J.T. Kartesz. 2009. North American Digital Flora: National Wetland Plant List, version 2.4.0 (https://wetland_plants.usace.army.mil). U.S. Army Corps of Engineers, Engineer Research and Development Center, Cold Regions Research and Engineering Laboratory, Hanover, NH, and BONAP, Chapel Hill, NC. Metz, V., and J. Dixon. 2006. Suggestions for Preparing a Wetland Delineation Report for the California Coastal Commission. Munsell Color. 2000 (rev. ed.). Munsell Soil Color Charts. Macbeth Division of Kollmorgen Instruments Corporation, New Windsor, NY. Soil Conservation Service. 1973. Soil Survey of the San Diego Area, California, Part I. United States Department of Agriculture, Washington, D.C. State Water Resources Control Board. Workplan: Filling the Gaps in Wetland Protection. September 2004. United States Army Corps of Engineers. 1991. CECW-OR Memorandum: Questions and Answers on the I 987 Manual. United States Army Corps of Engineers. 1992. CECW-OR Memorandum: Clarification and Interpretation of the 1987 Manual. United States Army Corps of Engineers. 1999. Code of Federal Regulations. Title 33, Volume 3, Parts 200 to End. United States Government Printing Office. United States Army Corps of Engineers. 2007. CECW-OR Memorandum: Clean Water Act Jurisdiction Following the United States Supreme Court's Decision in Rapanos v. United States & Carabell v. United States. United States Army Corps of Engineers. 2008. Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Arid West Region (Version 2.0). ed. J.S. Wakeley, R.W. Lichvar, P:\IKN130 1-Ikon\JD\JD _Report.docx <<5/23/2013» 15 __ j _j ___ i LSA ASSOCIATES, INC. MAY 2013 JURISDICTIONAL DELINEATION IKON LIMITED -CARLSBAD PARCEL CARLSBAD, CALIFORNIA and C.V. Noble. ERDC/EL TR-08-28. Vicksburg, MS: United States Army Engineer Research and Development Center. United States Department of Agriculture, Soil Survey Staff. 1975. Soil Taxonomy. Agriculture Handbook No. 436. United States Government Printing Office, Washington, D.C. 754 pp. Wetland Research and Technology Center. 1993. Draft Training Package, Wetland Delineator Certification Program. Environmental Laboratory, EP-W, Vicksburg, MS. P:\IKN1301-Ikon\JD\JD _Report.docx <<5/23/2013>> 16 LSA ASSOCIATES, INC. MAY 2013 APPENDIX A JURISDICTIONAL DELINEATION IKON LIMITED -CARLSBAD PARCEL CARLSBAD, CALIFORNIA COPY OF WETLAND DATA FORMS P:\IKN 1301-Ikon \JD\JD _Report.docx <<5/23/20 13 >> _j _I WETLAND DETERMINATION DATA FORM -Arid West Region 9 ~< (/.£ J c~/County: C4 r (s~AJ / S 0 ~ ·s~ a Sampling Date: t:;/1/13 Sampling Point: ____.\.__ __ _ ProjecVSite: ApplicanVOwner: lnvestigator(s): --J"'-L..c;.:::...!.,~,.;::;.....:~~..:...::..&.=-.>-:"""'~----Section, Township, Range:----------------- Landform (hillslope, terrace, etc.): Local relief (concave, convex, none): Cfl fACti V.( Slope (%): _j___ Subregion (LRR): -------------Lat: ---------Long:---------Datum: ___ _ Soil Map Unit Name: NWI classification:--------- Are climatic I hydrologic conditions on the site typical for this time of year? Yes J No __ (If no, explain in Remarks.) 1 Are Vegetation __ , Soil_. or Hydrology __ significantly disturbed? Are "Normal Circumstances" present? Yes_...; __ No Are Vegetation __ , Soil __ , or Hydrology __ naturally problematic? (If needed, explain any answers in Remarks.) SUMMARY OF FINDINGS -Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes_£_ No ---Is the Sampled Area Yes J Hydric Soil Present? Yes~ No ---within a Wetland? No Wetland Hydrology Present? Yes No ------ Remarks: A , l{. ((11~1 WI , tt-ot y...a-(~,e>t \.tAA.~ sOl. = IA!e-f~ ..._ 1 VEGETATION-Use scientific names of plants. I .{' Absolute Dominant Indicator Dominance Test worksheet: Tree Stratum (Plot s~zj [o f'A •"5 ) "ti Cover S~e!Oie!!? §latus Number of Dominant Species a 1. Se..l i X' J~·lF' l &r;-'1.£5 f/<0'1/ That Are OBL, FACW, or FAC: (A) 2. Total Number of Dominant ;l 3. Species Across All Strata: (B) 4. Percent of Dominant Species /00/::J ft.~ =Total Cover Sa~lisShrub Stratum (Plot size: ) That Are OBL, FACW, or FAC: (AlB) 1. ~~::l-0\M-!:{ ~rr:.l£'11o±L.c...c;;.{i~< ':) t\lo f-At--Prevalence Index worksheet: 2. Total~ Cover of: Multi~~bl£: 3. OBLspecies x1= 4. FACW species x2= 5. FAC species x3= 5 = Total Cover FACU species x4= Herb Stratum (Plot size: ) UPL species x5= 1. ~V\e-!MbfilJ a.l ~tort\'•<-~ ~b 'i.€'5 t2~L Column Totals: (A) (B) 2. :::/eLieoN ir:i ~ (br~~w-~+.a_l] la NC> 3. IJ.p.iWM iat.tdll&r 2-Nl> Prevalence Index = B/A = 4. Chri-ahA~ oSe(lo~lo& ~ Hydrophytlc Vegetation Indicators: 5. -Dominance Test is >50% 6: -Prevalence Index Is S3.01 7. _ Morphological Adaptations 1 (Provide supporting 8. data in Remarks or on a separate sheet) li =Total Cover _ Problematic Hydrophytic Vegetation1 (Explain) Woodl£ Vine Stratum (Plot size: ) 1. 11ndicators of hydric soil and weUand hydrology must 2. be present, unless disturbed or problematic. = Total Cover Hydrophytlc /"No Vegetation % Bare Ground in Herb Stratum % Cover of Biotic Crust Present? Yes Remarks: US Army Corps of Engineers Arid West-Version 2.0 SOIL Sampling Point· Profile Description: (Describe to the depth needed to document the Indicator or confirm the absence of Indicators.) Depth Matrix Redox Features {inches} Color lmoistl _%_ Color {moist} ~ ....ImlL --l.QL T~ure Remarks ~ 5'1fL -t. '0--1M2_ ---------c:;·, ,,_, J'1 "2.------------- ~.' ., --------- ------------ ------------ ------------ ------------ ---------1Type: C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grains. 2Locatlon: PL=Pore Lining, M=Matrix. Hydric Soli Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Solls3: _ Histosol (A1) _ Sandy Redox (S5) _ 1 em Muck (A9) (LRR C) _ Histic Epipedon (A2) _ Stripped Matrix (S6) _ 2 em Muck (A1 O)(LRR B) _ Black Histic (A3) _ Loamy Mucky Mineral (F1) _ Reduced Vertic (F18) _j _ Hydrogen Sulfide (A4) Loamy Gleyed Matrix (F2) _ Red Parent Material (TF2) _ Stratified Layers (A5) (LRR C) K Depleted Matrix (F3) _ Other (Explain in Remarks) _ 1 em Muck (A9) (LRR D) _ Redox Dark Surface (F6) _ Depleted Below Dark Surface (A 11) _ Depleted Dark Surface (F7) _j _ Thick Dark Surface (A12) _ Redox Depressions (FB) 31ndicators of hydrophytic vegetation and _ Sandy Mucky Mineral (S1) _ Vernal Pools (F9) wetland hydrology must be present, Sandy Gleyed Matrix (84) unless disturbed or problematic. Restrictive Layer (If present): Type: Yes~ Depth (inches): Hydric Soli Present? No Remarks: HYDROLOGY Wetland Hydrology Indicators: Prima~ Indicators {minimum of one rllQuired; check all that a!!!!~l Seconds~ Indicators {2 or more !!Quired} _ Surface Water (A1) _ SaltCrust(B11) _ Water Marks (81) (Riverine) 7High Water Table (A2) _ Biotic Crust (812) _ Sediment Deposits (B2) (Riverine) L Saturation (A3) _ Aquatic Invertebrates (B13) _ Drift Deposits (83) (Riverine) _ Water Marks (B1) (Nonrivertne) _ Hydrogen Sulfide Odor (C1) _ Drainage Patterns (810) _ Sediment Deposits (82) (Nonrlverlne) _ Oxidized Rhizospheres along Living Roots (C3) _ Dry-Season Water Table (C2) _ Drift Deposits (83) (Nonriverlne) _ Presence of Reduced Iron (C4) _ Crayfish Burrows (CB) _ Surface Soil Cracks (86) _ Recent Iron Reduction in Tilled Soils (C6) _ Saturation Visible on Aerial Imagery (C9) _ Inundation Visible on Aerial Imagery (B7) _ Thin Muck Surface (C7) _ Shallow Aquitard (D3) _ Water-Stained Leaves (B9) _ Other (Explain in Remarks) _ FAG-Neutral Test (D5) Field Observations: Yes __ No L_ Depth (inches): Surface Water Present? Water Table Present? Yes J No __ Depth (inches): 12- YesL Saturation Present? Yes~ No_-_ Depth (inches): ij Wetland Hydrology Present? No --(includes capiUary fringe) Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available: Remarks: __ I US Army Corps of Engineers Arid West-Version 2.0 _j _ j ___ j ___ j WETLAND DETERMINATION DATA FORM-Arid West Region Project/Site: f:lr/s hru/ force / City/County: (/:?c!~/'s't? Sampling Date: ~/¢ 7 Applicant/Owner: Z};.aA LtA..t ifd State: cA Sampling Point: __..,:;215..... __ _ lnvestigator(s): J). fltzrt'e-4= rf:"11t;Q /, S Section, Township, Range:---------------- Landform (hillslope, terrace, etc.):-----------Local relief (concave, convex, none): na!?e Slope(%): __!.Z Subregion (LRR): -------------Lat: ---------Long:---------Datum: ___ _ Soil Map Unit Name: ---------------------:7'-----NWI classification:--------- Are climatic I hydrologic conditions on the site typical for this time of year? Yes No __ (If no, explain in Remarks.) Are Vegetation __ , Soil __ , or Hydrology __ significantly disturbed? Are Vegetation __ , Soil __ , or Hydrology __ naturally problematic? Are "Normal Circumstances" present? Yes ~No __ (If needed, explain any answers in Remarks.) SUMMARY OF FINDINGS -Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes~ No ___ Is thlil Sampled Area Hydric Soil Present? Yes~ No ___ within a Wetland? ves_L No Wetland Hydrology Present? Yes ___ No ___ --- Remarks: ~r-a~ ;(;"" ""' nper'W;+L.. iri5 v-.ef-l4-~ ::: VEGETATION-Use scientific names of plants. Treestum (Plot size: JIP1 r:tv~tu I, Absolute Dominant Indicator Dominance Test worksheet: ~ Qover S~ecies? Status Number of Dominant Species 3 1. Mi<"'~vs. t~e--~.!1.//A. f2. I~ lf'5. 7r:.'2. ~'-That Are OBL, FACW, or FAC: (A) 2. 54:1/x /,;;.s:_~L?~rls /0 Total Number of Dominant 1. 3. Species Across All Strata: (B) 4. Sa~ling/Shrub Stratum (Plot size: /(/ f'/;..~ ·s) ttz = Total Cover Percent of Dominant Species 75~ That Are OBL, FACW, or FAC: (AlB) 1. Slu'11vs f-e..,.-,lu'rtl~£,f;A l lr2 F.d=t-y.~s. Prevalence Index worksheet: I 2. Total %Cover of: Mylti~lllbll: 3. OBLspecies x1= 4. FACW species x2= 5. FAC species x3= 1/J ~~~y /{;;I "' Total Cover FACU species x4= Herb stratum (Plot size: UPL species X5"' 1. £/r;.d!:Af~~--t: "t,># ,~.H; (l.O ~~ tfi?L Column Totals: (A) (B) 2. ~--j.--~0 oBL r.n 3. ~;-~ ~~i£A :3 IJD Prevalence Index = B/A = 4. Hydrophytlc Vegetation Indicators: 5. -Dominance Test is >50% 6. -Prevalence Index is S3.01 7. _ Morphological Adaptations 1 (Provide supporting 8. data in Remarks or on a separate sheet) 'i.~ = Total Cover _ Problematic Hydrophytic Vegetation 1 (Explain) Woodll Vine Stratum (Plot size: ) 1. 'Indicators of hydric soil and wetland hydrology must 2. be present, unless disturbed or problematic. = Total Cover Hydrophytlc Vegetation v· % Bare Ground in Herb Stratum % Cover of Biotic Crust Present? Yes No Remarks: us Army Corps of Engineers Arid West-Version 2.0 __ ) SOIL Sampling Point Profile Description: (Describe to the depth needed to document the Indicator or confirm the absence of Indicators.) Depth Matrix Redox Featyres (inchmi} Color (!!!gist} ~ Qg!gr (moist} _.L_ ....nmL ..J.Q.L Te~ure Re!lJilrkS 0 -l'l ~'112-3 ,£[1 ...!if!_ t5tJZ5Lr _L!L _{]____ __lj_ '51 1:7 a"'' L.&:¥ ,.., o -rz .... sye &.t.. ( ....!Lf2_ J( j_Q_~_fj_ , r ------------ ------------ ------------ ------------ ------------ ------------ 'Type: C=Concentratlon, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grains. 2Location: PL=Pore Linin!!, M=Matri.x. Hydric Soli Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Sons•: _ Histosol (A1) _ Sandy Redox (55) _ 1 em Muck (A9) (LRR C) _ Histic Epipedon (A2) _ Stripped Matrix (56) _ 2 em Muck (A10) (LRR B) _ Black Histic (A3) _ Loamy Mucky Mineral (F1) _ Reduced Vertic (F18) _ Hydrogen Sulfide (M) _ Loamy Gleyed Matrix (F2) _ Red Parent Material (TF2) _ Stratified Layers (AS) (LRR C) LDepleted Matrix (F3) _ Other (Explain in Remarks) _ 1 em Muck (A9) (LRR D) .,VRedox Dark Surface (F6) _ Depleted Below Dark Surface (A 11) _ Depleted Dark Surface (F7) _ Thick Dark Surface (A12) _ Redox Depressions (FB) 3lndlcators of hydrophytic vegetation and _ Sandy Mucky Mineral (S1) _ Vernal Pools (F9) wetland hydrology must be present, Sandy Gleyed Matrix (54) unless disturbed or problematic. Restrictive Layer (If present): Type: /No Depth (inches): Hydric Soli Present? Yes Remarks: HYDROLOGY Wetland Hydrology Indicators: Prima~ Indicators (minimum of one ~uired; check all that a!;!!;!!Y} Seconda~ Indicators (2 or more r~uired} _ Surface Water (A1) _ Salt Crust (B11) _ Water Marks (B1) (Riverine) _ High Water Table (A2) _ Biotic Crust (B12) _ Sediment Deposits (B2) (Riverine) -1£" Saturation (A3) _ Aquatic Invertebrates (B13) LDrift Deposits (B3) (Riverine) _ Water Marks (B1) (Nonrfverlne) _ Hydrogen Sulfide Odor (C1) LDrainage Patterns (B10) _ Sediment Deposits (B2) (Nonrlverlne) .YOxidized Rhizospheres along Living Roots (C3) _ Dry-Season Water Table (C2) _ Drift Deposits (B3) (Nonrlverlne) .,LPresence of Reduced iron (C4) _ Crayfish Burrows (CB) _ Surface Soil Cracks (B6) _ Recent Iron Reduction in Tilled Soils (C6) _ Saturation Visible on Aerial Imagery (C9) _ Inundation Visible on Aerial Imagery (B7) _ Thin Muck Surface (C7) _ Shallow Aqultard (D3) _ Water-Stained Leaves (B9) _ Other (Explain in Remarks) _ FAG-Neutral Test (D5) Field Observations: Surface Water Present? Yes __ No_L Depth(inches): Water Table Present? Yes __ No _L Depth (inches): Yes VNo Saturation Present? Yes _L_ No __ Depth (inches): 8:" Wetland Hydrology Present? --(includes capillary fringe) Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available: Remarks: __ j _j US Army Corr)s of Engineers Arid West-Version 2.0 WETLAND DETERMINATION DATA FORM-Arid West Region ProjecUSite: --c~~r.:£-.L/5~6:~:~~""---L..g,.Gi!i~~-""t!--'i<:4/~---City/County: -U~~=t..!.JII!.'6'""c"""'~~/.....l5~1)::.._ sampling Date: 5 /-r-/;3 Appl!canVOwner: /K0/\1 LtM ile.J State: C4--Sampling Point: __ ""=5......:;.. __ lnvestigator(s): ]) ~ ; e._ ..;_ a= 1-dtza: /-< S Section, Township, Range:---------------- Landform (hillslope, terrace, etc.): _ __.S ........ ~.:O~n..,""'-......_ _____ Local relief (concave, convex, none): _.-?....;..:;e:>_A....;I!_=----Slope (%): ~ r Subregion (LRR): --------------Lat: ---------Long: Datum: ___ _ Soil Map Unit Name:--------------------------NWI classification:--------- Ale climatic I hydrologic conditions on the site typical for this time of year? Yes ~-No __ (If no, explain in Remarks.) Are Vegetation __ , Soil __ • or Hydrology __ significantly disturbed? Are "Normal Circumstances" present? Yes ~· No __ Are Vegetation __ , Soil __ , or Hydrology __ naturally problematic? (If needed, explain any answers in Remarks.) SUMMARY OF FINDINGS -Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes / No Hydric Soil Present? Yes No / Wetland Hydrology Present? Yes___ No _L Is the Sampled Area within a Wetland? Yes No~ VEGETATION-Use scientific names of plants. I Absolute Dominant Indicator Dominance Test worksheet: Tree~m (Plot size: I 0 ) {; . !!! Cover S~cie!!? Status Number of Dominant Species 1. ,_~hi?lv~ ~t:.hii'!J.I!u:. It£ &2 ~~ EAL That Are OBL, FACW, or FAC: 3 (A) 2. Total Number of Dominant 3. Species Across All Strata: 3 (B) 4. Percent of Dominant Species , ~2 "' Total Cover That Are OBL, FACW, or FAC: LQO (A/B) sapfiSShrub ~ratum (Plot size:t · k £90 1£e5 'FA(., Prevalence Index worksheet: 1. r:JAu{uS r&€_6,. ·d t'-b.z!t. 2. ( I.2tSt 'M! Cover of: M!,!ltip~~: 3. OBL species x1 .. 4. FACW species x2: 5. FAC species x3= ;o' ~(/ = Total Cover FACU species x4= Herb §!ratum (Plot size: ~~~t;;~ll:~ UPLspecies x5= 1. Clar~~l·r: <"I r-e:::.s t)!!L Column Totals: (A) (B) 2. 3. Prevalence Index = BIA = 4. Hydrophytlc Vegetation Indicators: 5. ..;_ Dominance Test is >50% 6. _ Prevalence Index is S3.01 7. _ Morphological Adaptations 1 (Provide supporting 8. data in Remarks or on a separate sheet) <::'\ =Total Cover _ Problematic Hydrophytic Vegetation' (Explain) ~QQdl£ Vio~ ~rgtym (Plot size: ) 1. 'Indicators of hydric soil and wetland hydrology must 2. be present, unless disturbed or problematic. =Total Cover Hydrophytlc Vegetation % Bare Ground in Herb Stratum % Cover of Biotic Crust Present? Yes No Remarks: _j US Army Corps of Engrneers ,, Arid West-Versron 2.0 SOIL Sampling Point· Profile Description: (Describe to the depth needed to document the Indicator or conflnn the absence of Indicators.) Depth Mm!il! R~ox Features (inches} Qolor (moist} ~ !:;Qior (moi§t} ~...Im{_~ T~re B§mi!rks "-/; 5'{_11, ~'I 'f'~ u_,e 2,Lif. __s__c_-4-5:c~~c/9 ------------ ------------ ------------ ------------ ------------ ------------ ------------1Type: C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grains. 2Location: PL=Pore Lining, M=Matrix. Hydric Soli Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Solis': _ Histosol (A1) _ Sandy Redox (S5) _ 1 em Muck (A9) (LRR C) _ Histic Eplpedon (A2) _ Stripped Matrix (56) _ 2 em Muck.(A10) (LRR B) _ Black Histic (A3) _ Loamy Mucky Mineral (F1) _ Reduced Vertic (F18) _ Hydrogen Sulfide (A4) _ Loamy Gleyed Matrix (F2) _ Red Parent Material (TF2) _ Stratified Layers (AS) (LRR C) _ Depleted Matrix (F3) _ Other (Explain in Remarks) _ 1 em Muck (A9) (LRR D) _ Redox Dark Surface (F6) _ Depleted Below Dark Surface (A11) _ Depleted Dark Surface (F7) _ Thick Dark Surface (A 12) _ Redox Depressions (FS) 3lndicators of hydrophytic vegetation and _ Sandy Mucky Mineral (S1) _ Vernal Pools (F9) wetland hydrology must be present, _ Sandy Gleyed Matrix (54) unless disturbed or problematic. Restrictive Layer (If present): Type: NoL Depth (inches): Hydric Soli Present? Yes Remarks: HYDROLOGY WeUaild Hydrology Indicators: P!]ma[lllndicators (minimum of one regyired; check all that a1111M Seconda[lllndicators (2 or mQre reguired} _ Surface Water (A1) _ Salt Crust (B11) _ Water Marks (B1) (Riverine) _ High Water Table (A2) _ Biotic Crust (B12) _ Sediment Deposits (B2) (Riverine) _ Saturation (A3) _ Aquatic Invertebrates (B13) _ Drift Deposits (B3) (Riverine) _ Water Marks (81) (Nonrlverlne) _ Hydrogen Sulfide Odor (C1) _ Drainage Patterns (B10) _ Sediment Deposits (B2) (Nonrlverlne) _ Oxidized Rhizospheres along Living Roots (C3) _ Dry-Season Water Table (C2) _ Drift Deposits (B3) (Nonrlverlne) _ Presence of Reduced Iron (C4) _ Crayfish Burrows (CS) " _ Surface Soil Cracks (B6) _ Recent Iron Reduction In Tilled Soils (C6) _ Saturation VIsible on Aerial Imagery (C9) _ Inundation Visible on Aerial Imagery (B7) _ Thin Muck Surface (C7) _ Shallow Aquitard (D3) ;,. _ Water-Stained Leaves (B9) _ Other (Explain in Remarks) _ FAG-Neutral Test (D5) Field ObservaUons: Surface Water Present? Yes __ No ~epth (Inches): Water Table Present? Yes __ No Depth (Inches): NoL Saturation Present? Yes __ · No~ Depth Onches): WeUand Hydrology Present? Yes --(includes capilla!Y fringe) Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available: Remarks: -... ... -----..-~~·-.. US Army Corps of Engineers Arid West-Version 2.0 ) LSA ASSOCIATES, INC. MAY 2013 APPENDIXB JURISDICTIONAL DELINEATION IKON LIMITED -CARLSBAD PARCEL CARLSBAD, CALIFORNIA FUNCTIONS AND VALUE ANALYSIS P:\IKN 1 301-Ikon \JD\JD _Report.docx «5/23/20 13 >> ___ ] _I ~-' LSA ASSOCIATES, INC. MAY 2013 JURISDICTIONAL DELINEATION IKON LIMITED -CARLSBAD PARCEL CARLSBAD, CALIFORNIA ANALYSIS OF FUNCTIONS AND VALUES OF POTENTIAL WATERS OF THE UNITED STATES The following is an assessment of the functions and values attributable to the identified potential jurisdictional waters in the study area. All waters have some degree of functionality, and no single drainage can perform all of the functions considered below. The following functions are analyzed at low, moderate, or high value levels. The individual drainages are analyzed in Table A-1 (following) based on the criteria outlined below. HYDROLOGIC REGIME This function is the ability of a wetland or stream to absorb and store water belowground. The degree of this saturation is dependent on the soil composition and is affected by prior flooding events. For example, clay soils possess more pore space than sandy soils. However, the smaller pore size slows the rate at which water is absorbed and released and, therefore, clay soil has a lower capacity to store water than sandy soils. The storage of water below ground allows for the fluctuation between anaerobic and aerobic conditions that benefit environmental conditions necessary for microbial cycling~ FLOOD STORAGE AND FLOOD FLOW MODIFICATION This function is determined based on the ability of a wetland or stream at which the peak flow in a watershed can be attenuated during major storm events and during peak domestic flows to take in surface water that may otherwise cause flooding. This is dependent on the size of the wetland or stream, the amount of water it can hold, and the location in the watershed. For instance, larger wetlands or streams that have a greater capacity to receive waters have a greater ability to reduce flooding. In addition, areas high in the watershed may have more ability to reduce flooding in downstream areas, but areas lower in the watershed may have greater benefits to a specific area. Vegetation, shape, and the configuration of the wetland or stream may also affect flood storage by dissipating the energy of flows during flood events. SEDIMENT RETENTION Removal of sediment is the process that keeps sediments from migrating downstream. This is accomplished through the natural process of sediment retention and entrapment. This function is dependent on the sediment load being delivered by runoff into the watershed. Similar to above, the vegetation, shape, and configuration of a wetland will also affect sediment retention if water is detained for long durations, as would be the case with dense vegetation, a bowl-shaped watershed, or slow-moving water. This function would be demonstrated (i.e., high) if the turbidity of the incoming water is greater than that of the outgoing water. P:IIKNJ301-Ikon\JD\JD _Report.docx <<5123/2013>> B-1 __ j ___ j LSA ASSOCIATES, INC. MAY 2013 NUTRIENT RETENTION AND TRANSFORMATION JURISDICTIONAL DELINEATION IKON LIMITED -CARLSBAD PARCEL CARLSBAD, CALIFORNIA Nutrient cycling consists of two variables: uptake of nutrients by plants and detritus turnover, in which nutrients are released for uptake by plants downstream. Wetland systems in general are much more productive with regard to nutrients than upland habitats. The regular availability of water associated with the wetland or stream may cause the growth of plants (nutrient uptake) and associated detritivores and generate nutrients that may be utilized by a variety of aquatic and terrestrial wildlife downstream. TOXICANT TRAPPING The major processes by which wetlands remove nutrients and toxicants are as follows: (1) by trapping sediments rich in nutrients and toxicants, (2) by absorption into soils high in clay content or organic matter, and (3) through nitrification and denitrification in alternating oxic and anoxic conditions. Removal of nutrients and toxicants is closely tied to the processes that provide for sediment removal. SOCIAL SIGNIFICANCE This is a measure of the probability that a wetland or stream will be utilized by the public for its natural features, economic value, official status, and/or location. This includes public use for recreational uses, such as boating, fishing, birding, walking, and other passive recreational activities. In addition, a wetland or stream that is utilized as an outdoor classroom, is a location for scientific study, or is near a nature center would have a higher social significance standing. WILDLIFE HABITAT General habitat suitability is the ability of a wetland to provide habitat for a wide range of wildlife. Vegetation is a large component of wildlife habitat. As plant community diversity increases along with connectivity with other habitats, so does potential wildlife diversity. In addition, a variety of open water, intermittent ponding, and perennial ponding is also an important habitat element for wildlife. AQUATIC HABITAT The ability of a wetland or stream to support aquatic species requires that there be ample food supply, pool and riffle complexes, and sufficient soil substrate. Food supply is typically in the form of aquatic invertebrates and detrital matter from nearby vegetation. Pool and riffle complexes provide a variety of habitats for species diversity as well as habitat for breeding and rearing activities. Species diversity is directly related to the complexity of the habitat structure. P:\IKN 1301 -Ikon \JD\JD _Report.docx <<5/23/20 13 » B-2 L_ LSA ASSOCIATES, INC. MAY 2013 Table A-1: Functions and Values of Features within the Study Area Hydrologic Flood Storage & Flood Sediment Feature Regime Flow Modification Retention Drainage and Associated Moderate Moderate Moderate Terraces P: \IKN 1301 -Ikon \JD\JD _Report.docx <<5/23/20 13 >> Nutrient Retention & Toxicant Transformation Trapping Moderate Moderate JURISDICTIONAL DELINEATION IKON LIMITED -CARLSBAD PARCEL CARLSBAD, CALIFORNIA Social Wildlife Aquatic Significance Habitat Habitat Low High High B-3