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Home My WebLink About3156; JEFFERSON STREET BIKE PATH; MULTIPLE MITIGATION MONITORING & REPORTING PROGRAMS 1992- 1993; 1993-08-01August 1993 Mitigation Monitoring and Reporting Program City of Carlsbad Engineering Department fAR P&D Environmental Services A Division of P&D Technologies AR * '.TABLE OF CONTENTS • . . . ..... Section Page I, '-INTR9DUCTION I 1 H AFFECTED ENVIRONMENT Il-i A Existing Condition 11-2 • 1 Vegetation 11-2 • 2 Wildlife 11-10 3 Site Soils 4. Site Hydrology ..........................................11-10 11-10 B. Potential Project Impacts ........................ ............. Il-i 1 III RECOMMENDED MITIGATION MEASURES Ill-i Introduction ..............................................Ill-i Construction Monitoring .... ............................. Ill-i 1. Procedural Guidelines....................................... Exoti'c.S.ecies Removal ............ ........................ 111-2 Revegetation and Monitoring ..............................111-5 Site Preparation .........................., ............111-5 Planting Design ......................................111-6 Plant Sources......................................111-6 Installation................ . ......................... 111-7 Irrigation .......................- ....................111-8 Maintéance and Monitoring . .. .......................... 111-8 a. Maintenance ........................................ .. 111-8 b., Monitoring ..... c. Monitoring Schedule ..............................111-10 D. Protection of the Lagoon ...................... 111-10 IV REFERENCES .............................................IV -1 APPENDICES................... . .. ........ Monitoring Schedule . .. . .• . Biological Technical Report for the Jefferson Street Roadway Widening Pioject The proposed Jefferson Street Bicycle Path project is located predominantly along the northern side of the existing Jefferson Street Jefferson Street currently exists as a two lane road immediately south of Buena Vista Lagoon The project boundaries are from Marron Road to the east and Interstate 5 to the west (figures 1 and 2) The proposed project consists of the widening of existing Jefferson Street from Marron Road I- t 1-5 to accommodate two eight foot bike paths to be located along the north side of Jefferson Street The majority of the widening would be conducted on the north side of the Street with some widening on the south side near the intersection of Jefferson Street and Marron Road In addition to the actual paved areas of expansion grading impacts will extend out from the pavement The roadway has been designed to drain from the road into the lagoon These areas of potential impact as shown on the attached plans were analyzed for this report and are referred to as the impact zone following report details the existing conditions along Jefferson Street as well as the \posed mitigation plan for this project The mitigation plan describes recommended i.easures to mitigate for potential impacts to riparian habitats associated with grading for Jefferson Street which would result in encroachment of fill material into Buena Vista lagoon This mitigation plan also outlines mitigation measures to compensate for potential indirect impacts to the lagoon itself. The purpose of this mitigation plan is to ensure that potential impacts to natural resources resulting from implementation of the proposed project are sufficiently mitigated and that native vegetation is created to buffer and enhance natural open space areas along the bike path and lagoon shoreline This plan is designed to be utilized by the City of Carlsbad Planning and Engineering staff, construction foreman landscape contractor and monitoring biologist This mitigation plan is intended to address only those potential impacts associated with the widening of Jefferson-.,Street for the hjcycle path project. The mitigation plan would be applicable only insofar as revisions to the project remain in substantial conformance with the project Jefferson Street Bicycle Path P&D Environmental Services Mitigà tion Monitoring and Reporting Program Page I-i I, I. - Figure 1 No Scale Regional Map VIA . IP. I . Scale: V = 2000' - - Source: Source San Luis Rey 7.5 Minute Quadrangle Vi.cinity FV1ap 'Sectionll AFFECTED ENVIRONMENT The Jefferson Street Bicycle Path project consists of a street widening to accommodate two bike paths The widening of Jefferson Street will require the placement of fill adjacent to Jefferson Street encroaching into Buena Vista Lagoon along the lagoon s southern margin east of 1-5 A maximum of 0.1 acre of direct wetland impact would occur. While implementation of the project would affect sensitive biological resources the revegetation Plan included herein is intended to provide compensation to sensitive resources for both direct .and:indirect potential impacts, as identified below. A biological technical report has been prepared to address potential impacts associated with the widening of Jefferson Street to accommodate the proposed bike paths The purpose of that biological survey was to determine the nature and extent of the sites' sensitive biological resources Sensitive biological resources are defined here as habitats and plant or animal species that are listed by the California Department of Fish and Game (CDFG) or the U.S. Fish and Wildlife Service (USFWS) or are considered depleted or declining locally. The area of potential impact or impact zone was surveyed. on February 18, :1991 by P&D botanist Elyssa Robertson and wildlife biologists Ray Vizgirdas and Doug Willick Previous to the biologist's survey, the limits of potential direct impact along the roadway's northern side were staked by a survey crew. The impact zone was based on a 1 inch = 20 feet scale site II plan provided by the City of Carlsbad. Vegetation was mapped on these base maps which were included in the biological technical report. A wetlands analysis was conducted and a boundary determination was made based primarily on hydrophytic vegetation dominance and site hydrology. Dominant vegetative components were noted along the entire length of roadway within the impact zone These areas were plotted by segment as designated by survey markers Two soil samples were taken along the proposed route within the impact zone one within the disturbed wetland habitat and one within the undisturbed wetland habitat A preliminary soils analysis was conducted as part of this study due to the artificial nature of the fill material used to create the existing Jefferson Street roadway. Soil samples were taken primarily to locate the depth of saturated soil. Jefferson Street Bicycle Path , • P&D Environmental Services Mitigation Monitoring and Reporting Program ' • Pag8 ii- 1 Habitats along the proposed impact zone of Jefferson Street, from 1-5 to Marron Road consist of three types disturbed disturbed wetland and wetland habitats (figures 3-8) Disturbed habitats are defined as areas that are either barren or support non-native weedy or ornamental species On this project disturbed areas within the impact zone include a small dirt path for pedestrians barren areas eucalyptus trees (Eucalyptus sp) and slopes dominated by ice plant (Caroobrotus sp.). These areas appear to be continually disturbed through human activities sand: ere'r originally formed through construction of Jefferson Street The existing Jefferson Street appears to have been constructed on artificial fill near the east end (Marron Road) and on a hillside cut on the west end near 1-5 It is unknown if wetland conditions existed beneath the roadway at the time of initial construction at the east end of Jefferson $trêèt. Thif area has been disturbed long enougft however, that regeneration of wetland ha bitat is unlikely. For the purposes of this report, areas not supporting native plants are considered disturbed Under federalregulatins, wetlands are defined as areas that are inundated or saturated by surface or ground waters at a frequency and duration sufficient to support and that under normél circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions Three factors are considered in the designation of wetlands the presence of hydrophytic vegetation hydric soils and wetland hydrology. A minimum of one positivê.•wet!and indicator from each category must be found for the U.S. Army Corps of Engineers (ACOE) to determine an area to be wetland (ACOE 1986). Areas indicated as wetlands by all three factors during the rainy season may lack the indicators of hydrology and or vegetation during the dry season or the vegetation may have been altered or removed through human disturbance. Such areas may still be regarded as wetlands by resourôe agencies For this project site these areas are considered disturbed wetlands Disturbed wetlands are defined by the USFWS in the Unified Federal Method of Wetland Deli neàtion.as: "Disturbed areas include situations where field ,indicators of one'pr more of the three wetland identification criteria are obliterated or not present due to recent change" OR wetlands that under natural conditions are simply difficult to identify, such as wetlands dominated by upland species, wetlands lacking field indicators for one or more of the technical criteria for wetlands, and wetlands occurring on difficult to identify hydric soils" Jefferson Street Bicycle Path P&O Environmental Services '.1141t1ga10n Mohiloring and Reporting Program • Page-2 .: TI U : .. . . 141 7-0 7V Se A'61YO 1,16P I UI . TO/CP4J 13 IOve LEGEND - ---Limits of Impact Disturbed Wetland LIII Disturbed Habitat. 20 40 60 Figure 3 I Source: Keltner& Associates. Inc. . Wetland Delineation of I, Q0 . Jefferson Street Widening 0' -' - . 7?A/3/; /N/D EtI. / . . CAID ,qpç - .±._•_ ' \: fin a - i'wve w///TC srR/ec 70 -'. FA'o,l ØqLWQY (I ,Y'N)- (rYr,CAL) 7w'- P-f'PE,N(Aro (0D - /N'Eiits (Tr/) too to -. - .i-•1't" ' 00 - - - 02 • . . •• •" , \ .1701 - io xi'1' gil'6 • -. . . gc4I . . NO --. Hif (10.0 %406 AN 5 Ft CAL't'r E or6jt g.óP°' 41. IA -;-ø . . .r(. k . . coA,3rRur PER 7ypi(9- LEGEND Limits of Impact Disturbed Wetland Disturbe'd.Habitat: 40 'CIO Hgure"4 I WJiM Jc I !I!1 to \ I - - I ---- 3 2G 3 23 242 f5 £/ — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — (200' N4, __ - 50 OClVeW,4 Y G rip PrCW C42 MWA16 I V- I 0 tj 2) / 'I- S S - .•U k' 'El - I I I I I Source: Keitner &,Associates. Inc. (7d LEGEND .- Limits of 'impact,. Disturbed Wetland EIIJ Dlsturbe.d HabIltat 0 20 40. - GO J. S Figure Wetland Delineation of- 'Widening StreetWidening .: - kh 7Of M9Y PAINT8' CAN 16 1cPAA/ / (TYPIt4L) I •\ DOTN 51oe) . ) I .•. I \\ - - - - - - - ,rAJ128 n4o .. C0W irk- .=--- -- - 742 1 - PW1 32 53 CO R m- . S . . - . p- TA' £74 Z2 S S . .'Cç, / LEGEND. -- Limits of Impact Disturbed Wetlènd LII Disturbed Habitat o • 20 40 C0 Figure 6 Wetland Delineation of Jefferson Street Widening :12 I:. I i: I, I I Source: Keitner & Associates, Inc. 170 No 5i6NAt A pONO T / I IL -. IL IL IL IL IL 35*15 Source: Keitner &Associates. Inc. IL LEGEND Limits of Impact Wetland Disturbed Habitat 010 40 G.0 Figure 7 Wetland Delineation of Jefferson Street Widening c_. M?l' J lU - - ............ --I--- ------- ----------- —I -__-_________________ 'U H (F;fVEUTP). J I. I L nk 13 ' T I ------ — -- -- — T 5 — IN sric/P63 I L (f;rM \ , 0 -- - r_j2it iTzf O/V 1 '1' [1 14 N 034 -- /VV >0 56RM (O ._— I c__I-. V. 0• 1 b'l' 1 4 . LEGEND . 0 Disturbed Habitat 01 0 20 40 • 6.0 1 It Source: Keitner & Associates.-Inc. Figure 8 Wetland Dehneation of Jefferson Street Widening The disturbed wetland within the impact zone of Jefferson Street does not have the indicators of hydric soils or hydrology It is, however, dominated by (greater than 50 %) facultative wetland plant species arrow weed (Pluchea sericea) Facultative wetland plants are defined as plants which usually occur in wetlands (estimated probability 67% to 99%), but are occasionally found in non-wetlands (USFWS 1 988) The understory of these areas are either bare ground or a weedy assemblage of ice plant and other non-native species •Wetländs within the study area were areas.. 'which exhibited a marsh growth, contained sandy soils and soil moisture was within two inches of the surface Plants dominated within this area included cattails'(Typha latifolia), American bulrush,(Scirpüs americanus) and spiny rush (Juncus acutus var. shäerocarpus). Sandy soils, though not a true anaerobic 'soil,is listed on the USDA list, of hydric soils (USDA .1 985). In addition, after taking two soil samples within this area soil moisture was noted within two inches of the soil surface To meet the hydrology criteria, soil moisture must be within six inches from the, surface (Wetland Training lnstitute,1 989). -Sensitive Habitat s and Plants Sensitive habitats are those which are considered rare within the region, are listed by the California Natural Diversity Data Base,; or support sensitive plants or animals. The only sensitive habitat orisite is the wetland habitat along certain portions of the proposed bike path. Wetlands, are subject to the Clean Water Act permit.-provisions regulating their filling and may- be subject to the Rivers and Harbors Act, as well. These are enforced by the ACOE and the U.S. Environmental Protection Agency, with technical input from the U.S. Fish and Wildlife Service. Wetland habitat is. naturally limited and. remaining acreages are important island habitats for migrant birds. Many bird species are restricted to wetland habitat and are dependent on it for breeding Overall wildlife diversity is normally higher in wetland areas than in surrounding habitats. Approximately ;0 .acres of disturbed wetland habitat and approximately 0.01 2 acres of wetland habitat.exists in the study area. High interest plants include those listed'bythe U.S. Fish and Wildlife Service (USFWS, 1985), Calif orniaDepärtment of Fish and Game (CDFG, 1985) and the California Native Pla'nt'Society (Smith and Berg, 1988). The CNPS listing is säñctioned by the California Department of Fish and Game and essentially 'serves as its list of "candidate" species for threatened and - Jefferson Street Bk'cle Path • P&D Environmental Services Mitigation Monitorin,and Reporting Program • ' . Page 11-9 U éndängeredstatus. Table 1 of Appendix B (Biological Resources Technical Report) lists the sensitive plant species known from the area but not observed One sensitive plant species was noted onsite spiny rush is listed by the CNPS as a plant at I limited distribution (List 4) This plant occurs in the marsh habitat of the wetland Approximately five individuals would be directly impacted by the proposed project I WILDLIFE I Wildlife species detected during the survey are listed in Attachment B of the biological resources technical report None of the animal species observed or detected within the I project area is listed as endangered or threatened by the U.S.. Fish and Wildlife Service (USFWS) or the California Department of Fish and Game (CDFG) Sensitive wildlife species I likely to occur in the vicinity are summarized below in Table 2 of Appendix B the Biological Resources Technical Report. I SITE SOILS According to maps prepared for the Soil Conservation Service (1973)' soils indicated for the project area are identified as Terrace Escarpments" This soil type belongs to hydrologic group D and represents soils with highest runoff potential These soils are composed primarily of clays that have a very slow infiltration rate a high shrink-swell potential a high permanent water table, and are shallow over nearly impervious material Terrace Escarpment soils are highly erodible have severe limitations for use, and if used require protective and corrective measures to be taken before and during their use SITE HYDROLOGY :1 The proposed project site is located within the Carlsbad Hydrographic Unit and portions of the I project may lie within the 100-year flood plain. However, a detailed hydrologic study was not conducted for this project. Drainage in the vicinity of the'project, in general, moves in a I westerly direction and collects in the lagoon The lagoon has been closed to the ocean since the late 1 960s. The source of water in the lagoOn is a combination of natural runoff from surrounding urban development and stream flow from Buena Vista Creek. I Jefferson Street Bicycle Path P&D Environmental Services Mitigation Monitoring and Reporting Program Page X 10 B POTENTIAL PROJECT IMPACTS I The impact analysis was based on habitat within the impact zone and indirect impacts associated with drainage into the lagoon Acreage analysis was not conducted for areas I " ,• outsidethe impact zone. The proposed project would directly impact 09 acres of disturbed wetland habitat and 01 acres of wetland habitat for a total impact of 0.".1 acres Impacts to wetland habitat though I not large are considered significant by the USFWS and CDFG Impacts associated with the loss of spiny rush are not considered significant at this time due to this plant's low sensitivity status and the abundance of this species within the protected lagoon habitat The I remaining area within the impact zone as shown on the attached plans is considered disturbed habitat Impacts to this area are not considered significant Potential indirect impacts to the habitat and wildlife of the lagoon associated with the road :widening are expected to occur. Potential indirect impacts which may occur include: (1) increased pollutant discharge of petroleum based products from the roadway into the lagoon d:to'runoff, including oil, grease and/or gasoline and; (2) increased human encroachment into the area due touse of the area by pedestrians and recreational users. These impacts are considered potentially significant based on the amount of increase for each. 'The. impacts identified above would be rduced' to a level 'less than significant through implementation of the mitigation measures provided in the Biological Technical Report and as described in Section III of the mitigation plan. :4 I I Jefferson Street Bicycle Path P&D Environmental Services I Mitigation Monitoring and Reporting Program Page X 11 'Section Iii .5 RECOMMENDED MITIGATION MEASURES I A INTRODUCTION The proposed Mitigation Monitoring Plan encompasses two distinct :'phases The first is I construction monitoring This is vital to ensure that additional impacts to the adjacent lagoon resources do not occur The second phase is the removal of exotic highly invasive, species I from two specific areas adjacent to the roadway and a revegetation program The first area is on the north side of the road and involves the removal of palms giant reed and castor I bean The second area is on the south side of the lagoon within Hosp Grove The goal of the mitigation for Jefferson Street widening is to protect the adjacent lagoon and enhance wetland habitats B CONSTRUCTION MONITORING I An important aspect of the total mitigation program is the construction monitoring phase of I the project This is en essential to the project to.sure that the revegetation is installed per the approved plans and specifications and to ensure that additional impacts beyond those identified for this project do not occur The monitoring biologist will be onsite through the initial construction project including staking and clearing to ensure potential direct and indirect impacts to sensitive plant and wildlife species are avoided The construction I monitoring phase includes pre construction meetings landscape plan review, site inspections during staking and clearing activities as well as weekly site visits to observe implementation of the site's revegetation plans PROCEDURAL PROGRAM GUIDELINES I' .' •,: ' Priôrto initiation of any construction activities, 'meetings shall take place between all parties involved to discuss and outline the monitoring program and to establish the responsibility and authority of the participants Those included at these meetings should include City staff, the I project biologist/monitoring biologist a CDFG representative the construction supervisor and grading foreman, the landscape architect, and the landscape installation contractor. The' I purpose of these meetings will be to provide communication between the involved parties establish an effective reporting system prior to any monitoring effort, and 'to ensure that all I Jefferson Street Bicycle Path ' S . P&D Environmental Services. ........S Mitigation' Monitoring and Reporting Program . Page ill-i 1' I I parties have a clear understanding of their responsibilities andwhat the established chain of communiáation ilI be'f or this project. I Discussions at these meetings should focus on understanding the purpose and function of I flagging and staking of the daylight line and the limits of grading, the identification of sensitive :resources,areasof the site to remain undisturbed and those to be affected, the areas to be I revegetated and the establishment of a communication hierarchy, All project participants will have a clear understanding of the importance of the adjacent lagoon habitat to state and federal agencies. The monitoring biologist will communicate directly with the City's engineering staff (project I engineer and site construction supervisor) Copies of correspondence between all parties as identified above shall be sent to the project manager at the City's Municipal Project's I Division It will be:theresponsibility of the project manager to ensure that issues raised during the cOnstruction process by the biologists, landscape contractor, landscape architect, I construction supervisor and/or grading contractor are addressed in a timely and appropriate manner. 1 The limits of impact (daylight line, not right-of-way) will be clearly staked and flagged by the City in coordination with the monitoring biologist immediatel.y prior to commencement of 'I grading and clearing activities. The construction foreman will be informed by the City of the sensitivity of the. adjacent lagoon habitat and that any impacts to areas outside the impact 'I ' -,zone, will be prohibited. If impacts occur inadvertently, remedial mitigation and: notification to CDFG, California COastal Commission and ACOE will be required. A biologist will conduct onsite construction monitoring activities twice-weekly during initial grading and weekly thereafter to ensure construction activities do not affect biological I resources outside the project's specified limits Monitoring will be performed by biologist qualified in assessing proper revegetation implementation and identification of offsite impacts, 1 •• should they occur. Information from these, as well as other site visits, will be incorporated into interimeports prepared for the City of Carlsbad. C. EXOTIC SPECIES REMOVAL. • A number of exotic plant species situated within the :existing habitat along the south side of the lagoon and within Hosp Grove have been targeted for removal, as part of this mitigation Jefferson Street Bicycle Path P&D Environmental Services MitigatiónMonitoring and Reporting Program Page 111-2 I plan The area encompassed by the exotic species equals or exceeds 0.4 acres required as mitigation Each of the areas will be replanted with native wetland species Exotic plant I speciesoffer little in the way of appropriate" or useful habitat for' .wildlife using the lagoon and its many environs In addition exotic plants are invasive and can easily overtake natural I habitats After removal of these species native Wetland-associated vegetation will be planted W will enhance the existing habitat value in this area Those species identified for removal or to be cut down are listed on the landscape plans provided with this mitigation plan document These species include castor bean myoporum I --- -treegiantrèd, and date palm trees. The location and number of each of these species is provided,-in the landscape plans (Map Pocket No. i)• Exotic plant removal will be performed in accordance with the specification in the enclosed landscape plan and as provided below. I . All exotic plants to be removed or Cut down will be flagged prior to initiation of removal. Amionitoring biologist and landscape contractor will review each removal area prior to constrUctibn. Due to the varied topography,and location, different removal methods I may be incorporated. Removal alternatives by: species is described below and if a different removal method is considered, approval, is required by the City. Date..PalrñslMv000rum Trees -Thé methodology of tree removal varies based on their location. Trees that are relatively close to the road-can be chained and pulled out. Pulling a tree should remove the root system as well. This method should only be used if native trees-or shrubs would not be impacted by the "dragging" of the tree. - Trees that are closer to the water's edge or in -dense vegetation will be cut down. The trees I :needto besupportedduring cutting to preclude falling On native species. The tree should be lifted up and out of the habitat. The stump should be cut as close to the ground as possible and ground out. If grinding is not possible, the stump will remain in place and wetland species, will be planted around it. Chemical stump removal may-be used if it is guaranteed to not -I' leach into the adjacent wetlands or ground water. 'All leaf and debris will be removed from - the area. --I - - JeffersOn Street B/c yclePath R&D Environmental Services Mitigation Monitoring and Reporting Program - Page 111-3 I Any hdles crated by stump removal will be filled with clean top soil.,The area will not be compacted, nor will any fertilizer be used Trees will not be removed during the breeding I season of birds (March-June) Prior to removal an ornithologist will conduct a nesting survey in each tree and within adjacent trees If any native species are inadvertently impacted, the contractor will b,e'required to replace the ha6itat in-kind. I Casor Bean "Castbr bean iplants will be removed as identified on the attached' plans. Plants will be removed utilizing hand tools such as' chain saws, ax, etc. Roots at each plant will be hand dug out. If roots cannot be removed, 'then the trunk will be cut close to the giound and appr,oved,herbicide iII be applied. A'pplicatiohof the herbicide will be carefully monitored by the biologist and will not be sprayed. The herbicide will be applied direätly to the cut stalk. If the' caster bean plant is located near the road, then the plant may be removed by pulling it with a vehicle on the road. This plant will not be removed, if, seed is present. All cut material will berem'oved from the' site immediately. Giant Reed A large clump of giant reed exists on the north side of Jefferson Street. This plant will be cut by hand as close to the ground 'as possible.' The exposed stalks will be hand painted with full strength Rodeo (TM) immediately.after cut. The herbicide will be appliéd'using a brush to the exposed stalk only. No residual spillage ofthé herbicide will be allowed. The application of the herbicide will be monitored 'by the bioIgit.. If the plant re,-sprouts a 'second treatment' ..rñayb,e required"as determined by the biologist. This plant will not be cut while in seed. All 'Put material will be immediately removed form- the site. The area can be replanted immediately since the herbicide is hand applied. Ice Plant 'A small pond exists on the south side, of Jefferson Street within Hosp Grove. ,The pond is completely surrounded by ice plant. This. revegetation program requires 0.04 acres of the HOsp Grove site: The remaining area surrounding the pond is required to be restored to native habitat as part' of 'a park plan proposed in the future. 'However, for any restoration project to be successful in this area', all of the ice plant should be removed at one time. If possible, both 'the'Jeffe'rson Street and the Hosp Grove Park mitigation should be planted at the same time. ,Jeffersbn Street Bicycle. Path , '- - P&D Environmental Services Mitigation Monitoring and Reporting Program Page 1/1-4 - d over the area not revegetated If that is not possible, then a very thick mulch should be place as part of the Jefferson Street revegetation program In addition continual weed abatement Will' be required and the success of Jefferson Street revegetation will decrease A herbicide treatment is recommended for ice plant removal in late summer or fall The area should be sprayed with 1 Y2% to 2% solution Rodeo (TM) plus %% of a nonionic surfactant A marker dye should be used to identif..y;if spray is drifting onto adjacent plants or toward the lagoon Great care should be taken near the pond Hand removal is recommended within 2 to 3 feet of the pond The ice plant will turn brown in 6 to 8f weeks, at which time it should be removed and the area revegetated All ice plant will be removed from the site Herbicide application will be carefully monitored by the biologist If it is determined that drift is occurring, then the application willbe stopped and hand-removal will be required. D. •REVEGETATION AND MONITORING. . . . I... The purpose of this revegetation plan is to ensure that potential impacts to wetland resources resulting from. project implementation are sufficiently•.mitigated.to reduce such impacts toa level less than significant. Approximately 0.4 acres of wéland..habitat would be restored under this revegetation plan for impacts-to:-0.1 acres of disturbed wetland and wetland habitat. It is the intent of this revegetation plan to replace the existing habitattype with in- kind orbetter habitat The areas identified for eoti-plánt removals will be suitable for the revegetation effort (MapPocket 1-4). Revëgetation of this area willenhance and recreate wetland habitat that cannot occur there naturally due to dominance of ice plant, giant reed, and palms in the area. SITEPREPARATlON . After removal of the exotic species the soils will bescarified or roUghed-Up in areas to be hydroseeded. This program does not propose irrigation or soil amendments. Due to the I: Ibcätions of the revegetation effort it is Unlikely that irrigation would be required. In addition, soil amendments are generally not used for native revegetation projects where the native soil ..I: . will not be altered. Therefore, minimal site preparation is required. It is expected that wetland conditions (hydric soil development), as needed for riparian habitat creation, will develop j, .. . . naturally over time due to the: site's existing. hydrologic character, thereby not requiring long- term irrigation or fertilization. I Jefferson Street Bicycle Path . . P&D Environmental Services Mitigation Monitoring and. Reporting Program • . • Page 1/15 i I PLANTING DESIGN I The planting design specifies the steps required for the restoration of existing disturbed and undisturbed wetland habitat adjacent to the lagoon The ultimate goal of the mitigation I A program is to restore as well as recreate riparian habitat along Jefferson Street through simulation of the physical structure species composition and the ecological function of the I existing undisturbed habitat Selection of plant species was determined largely by existing species composition adjacent to the lagoon and those species available commercially The mitigation area will consist of brackish marsh being a mixture of salt tolerant species and freshwater species. It is expected that the soil has 'a relatively moderate salt content, but the h'dro!àgicaI influence will be freshwater. 'The areas to berevegetated are in the areas of exotic plant removal. Therefore, based on 'removal methOd, each site will be different. The planting design is meant o be flexible to allow fOr changes in'-the field. The trees and.-shrubs will be planted at the spacing shown on the landscape plans. Thehydroseed will be applied after the planting is complete. Plant quantities and exact locations cannot be determined for the areas on the north side of Jefferson Street due to unknown area size at each exotic plant removal location. A random mixture of the container specimen should be planted at each location. The Tvpha sp. should be planted only if an area is adjacent to the water's edge. 'The area within Hosp Grove on the south side of the road will be planted as shown on the landscape plans. The same hydroseed mix will be utilized in this area as on the north side. 'PLANT SOURCES It should be noted that the preferred method of revegetation is to use seed or cuttings from existing native plants onsite to maintain genotypic characteristics and potential adaptive gene variations, where feasible. The use of non-indigenous, native plant materials in revegetation programs can result in problems which include failure to survive or establish, displacement of- indigenous species, hybridization with indigenous species, introduction of inappropriate taxa, and the unintentional introduction of other organisms, including 'pathOgens and pests (Recon 1991). Asa result, plant. materials to- be used in any revegétation plan should be derived from materials local to the mitigation site, wheneverfeasible. Whenever indigenous plant materials are not readily available commercially, advanced planning and increased costs may berequired Jefferson Street Bic'ycle Path . S P&D Environmental Services Mitigation Monitoring and Reporting Program Page 111-6 to revegetate with such materials Sources for cuttings and seeds should be identified by the landscape architect project biologist or other revegetation specialist, as designated by the I City P it typically takes approximately six month to one year from the date of plant material collection to produce one-gallon container stock provided collections are made at the I appropriate time of year. However, some needed plant materials may already be available at native plant nurseries Use of these nurseries and their existing plant stocks will avoid the need for 'contract growing" from seed and cuttings taken from the project site If seeds are to be collected from onsite they should be taken the year previous to implementation of the I hydroseeding effort The composition of the hydroseed mix will be consistent with the species composition I previously recorded for the site in the Biological Technical Report This mixture will include both shrub and herbaceous plants (Table 1 and Map Pocket No 2) Because some material I will establish quickly, it is expected to provide some erosion control and reduce potential weed problems They will also add to the organic component of the soil Changes due to I availability, can be made to the seed mix with approval from the monitoring biologist TABLE NATIVE HYDROSEED MIX I Seed Poundsøer acre I Artemisia douojasiana (Douglas Sagewart) 2.0 Anemopsis californica (Yerba Mansa) 3 0 Frankenia cirandifolia (Alkali Heath) 2.'0 Heliotropium curvassavicum (Wild Heliotrope) 2.0 Lasthenia chrysostoma (Dwarf Goldfields) 2.0 Lupinus succulentus (Arroyo Lupine) 6.0 DistiôhIisspicata (Salt Grass) 15.0 I Total 32.0 INSTALLATION For native plants the best survival rates occur when application of hydroseed or planting of I container stock is completed in the late' fall or winter (November through February). This would :take advantage of the seasonal rainfall. Installation should be done concurrent with Jefferson Street Bicycle Path P&D En viron,ei,tàl Services Mitigation Monitoring and Reporting Program Page 111 -7 I construction If this is not within the appropriate planting period as suggested above then plan'tidg:shouldoccur as soon after clearing of exotics as possible. IRRIGATION The revegetation plan will nbtindludethë installation of an irrigation system. The goal of this native revegetation program is the creation of habitat that is self-supporting and will persist over long periods of time without additional human involvement Should the goals of this program not be attained within a reasonable amount of time the City of Carlsbad may require modification to the proposed plan and require irrigation Supplemental irrigation will be permanently discontinued after the project biologist and landscape architect determine that the restored habitat is self-sustaining. MAINTENANCE AND MONITORING Maintenance and monitoring of the revegetation site will be required after installation of -vejetationi to ensure habitat establishment and determine compliance with success criteria It is anticipated that maintenance during establishment will be primarily the responsibility of the City of,Carlsbad or its agent, with input fromthe project biologist. I The maintenance program has several goals 1) replacement of dead dying insect infested, or diseased plant materials 2) repair any forms of vandalism or accidental damage to fencing Ic or restoration materials and 3) removal of invasive weedy species within the mitigation restoration area All maintenance activities shall be under supervision of the project biologist throughout the five year mitigation program Maintenance inspections shall be conducted I quarterly for the first two years and twice yearly thereafter, or as needed to perform the above-mentioned maintenance tasks. I I Jefferson Street Bicycle Path P&D Environmental Services Mitigation Monitoring and Reporting Program Page 11/8 monitoring I Qualitative Monitoring 1 The qualitative monitoring program has several goals including qualitative evaluation of the plantings, identification of pest disease and vandalism determination of plant survival and control of competitive, non-native vegetation A visual inspection of all plant materials will be made by the landscape contractor, in consultation with the project biologist on a monthly basis for the first six months following installation, with visits every 90 days thereafter for the remainder of the first two years All I losses in excess of 10 percent for the first year will be replaced in-kind by the landscape contractor unless it has been determined by the project biologist and landscape architect that I use of another species and/or other stock size would better achieve revegetation goals Thereafter plant materials would be checked twice annually for the remaining three years by I the project biologist as part of the technical monitoring and assessment Replacement planting would be performed by the landscape contractor under direction of the project biologist each fall or winter, as necessary, to achieve a survival rateof 80 percent for years 2-5 I Weedy, non-native vegetation will be removed as required by the monitoring biologist to prevent adverse competition within the revegetation area Specific species identified for removal in the riparian habitat include all tamarisk (Tamarix sp), giant reed (Arundo donax), tree tobacco (Nicotiana glauca) castor-bean (Ricinus communis) and/or pampas grass (Cortaderia :sp) which may develop Additional non-native species as identified by the I monitoring biologist, may also be targeted for removal. i Quantitative Monitoring . . . A five-year quantitative monitoring program will be conducted in conjunction with the above qualitative monitoring program The quantitative monitoring program is designed to gather I data on the success of plant establishment habitat development and to formulate plans for remedial actions. . I Monitoring will be conducted by a biologist with experience in revegetation programs and commence following completion of planting and hydroseeding operations Quantitative I Jefferson Street Bicycle Path P&D Environmental Services Mitigation Monitoring and Reporting Program Page 11/9 I I analysis shall consist of measurements using fixed 1 by 1 meter quadrants (two quadrants per site) Measurements in the quadrants will include height and cover for shrub species and I groundcover for herbaceous species The percentage of invasive exotic species which develop during the five year monitoring period will also be determined Quadrant I measurements will evaluate percent cover of the hydroseed mix as it germinates, using a grid system All trees and shrubs within the revegetation area will be measured to ensure I .continuous growth during the five year monitoring progiarn. Measurements will include tree height girth and crown cover. 'Monitoring Schedule Appepd,ixA..of this report outlines the general schedule for monitoring of the revegetation ,prpjec,t over a five year period. Quantitative analysis will be conducted quarterly the first year,, twice ahn'üall.y the sècond'and thirdyears, and annually, thereafter. All qualitative monitoring' will be conducted quarterly each year, unless remedial action is required Thereafter, monitoring may, occur more often depending on the extent of remediation requires. Annual reports will be completed each y.ear for a total of five reports. "Letter reports will be submitted after each monitoring period. Should any remedial action be required, the City of Carlsbad would be notified prior to corrective actions being taken. Remedial actions required would. be summarized in each annual report. D. PROTECTION.OF THE .LAGOON Recommendations for indirect impacts àssociàted with silt and pollutants from the widened roadway and increased pedestrian traffic include the installation of facilities to limit both 'of these effects. The first may be controlled through, the use of a gravel filter at the storm -drain inlet (Figure 17). This may be required as 'part of the new Regional" Water Quality Control Board Order 90-42 limiting pollutants from storm-drains into natural waters. The gravel drain is expected to collect petroleum-based products, such as oils and,grease, as well as silt, thereby limiting the'amount of these pollutants and sediment entering the lagoon from this area. Pedestrian traffic will be discouraged from entering intOsensitive areas of the lagoon through signage Sidewalks and bicycle lanes will tend to keep pedestrians and 'bicyclists to areas intended for active use's. Jeffórsoñ Street Bicycle Path. , P&D Environmental Services Mitigation Monitoring and Reporting Program ',Page 111-10 Meetings Pre construction'F oremanBiologist, I Post construction Landscape Architect Annual Project Engineer I Construction Twice weekly to Biologist monitoring completion Exotic tree Construction period Landscape Architect I removal Biologist Collect seeds/cuttings Six months prior to Landscape Architect I (if need'ed) construction Biologist rosion control On going throughout Landscape Architect I construction and monitoring Biologist periods I Plant material Quantitative quarterly Biologist for first year, twice I and yearly for years 2& 3, annually, thereafter Qualitative; quarterly Landscape Architect I throughout 5 year monitoring Biologist period I TEFFERSON STREET BICYCLE PATH MITIGATION MONITORING AND REPORTING PROGRAM Prepared for: CITY OF CARLSBAD Engineering Department 075 Las Palmas Drive Carlsbad, California 92009 Contact: Al Virgilio (619) 438-1161 Prepared by: P&D TECHNOLOGIES 401 West "A" Street, Suite 2500 San Diego, California 92101 Contact: Elyssa Robertson (619) 232-4466 April 1992 1 • 1 •• 1 TABLE OF CONTENTS I Section Page 1 INTRODUCTION i-i 1II AFFECTED ENVIRONMENT 11-1 -, A. Existing çoñdition. ............................................ 11-2. I 1. Vegettion....................................................11-2 • :. 2. Wildlife ................. .................................. 11-10 3 Soils 11-10 1 . 4. Hydrology . ...................... . . . . . . . . . . . . . . . . . . . . . .Il-li B Potential Project Impacts 11-12 I III RECOMMENDED MITIGATION MEASURES Ill-i A Construction'Monitoring 1 Procedural Guidehnes 111-1 B Exotic Tree Remova1 C Revegetation and Momtonng 111-4 111-5 1 Site Preparation 111-5 2. Planting Design .... ..................................... 111-6 I 3: P1àritSources ................. .......................... 4 Installation 111-6 ffl-8 Irrigation .................................................. 111-8 Erosion Control....................................... 7 Maintenance and Monitoring- 111-9 111-9 a. Maintenance .........................................ffl-9 I . . . b. . Monitoring ...................................... c.Monitoring Schedule ............... .................. ffl40 Ill-il D. Protection of the Lagoon ........ .............................. 111-12 IV REFERENCES ............... .............................. IV-1... I APPENDICES.................................................... . I A. Monitoring Schedule . B Biological Technical Report for the Jefferson Street Roadway Widening Project I •. .' ,. S I Section I INTRODUCTION 1 The proposed Jefferson Street Bicycle ,Path pr9jct is located predominantly along the northern I side 'the existingJefferson Street Jefferson Street current1y exists as two,.lane road"( immediatçly south of Buena Vista Lagoon The project boundanes are from Marron Road to the I east and Interstate 5 to the west (figures 1 and 2) I The proposed project consists of the wid&ng ni of existing Jefferson Street from Marron Road to 1-5 to'accommodate two eight foot bike paths to be located along the north side of-Jeffeison I Stret The majority 'of the widening would be conducted on the north side of the street with some w4ening on the south side near the intersection of Jefferson Street and Marron Road In -1 addition to the actual paved areas. of expansion, radi'ng impacts will extend out from the pavement The roadway has been designed to drain from the road into the lagoon These areas I .of potent.ial impact, as shown on. the attached plans, were analyzed for this report and are referred :to the impact zone. The following report details the existing conditions along Jefferson Street, as well as the proposed ' mitigation plan for this project The mitigation plan-describes recommended measures to mitigate for potential impacts to npanan habitats associated with grading for Jefferson Street which would I result in encroachment of fill material into Buena Vista lagoon This mitigation plan also outlines mitigation me.sures to compensate 'for potential indirect impacts to the lagoon, itself. I The purpose of this mitigation plan is to ensure that potential impacts to natural resources resulting from implementation' of the proposed projec t are sufficient ly mitigated and that native I vegetation is created to buffer and enhance natural open space areas along the bike path and lagoon shoreline This plan is designed to be utilized by the City of Carlsbad Planning and HI .' 'Engineering staff, construction foreman, landscape contractor and monitoring biologist. .1 This mitigation plan is intended to address only those 'potential impacts associated with the widening of Jefferson Street. for the bicycle path project. The mitigation plan would be applicable only insofar as revisions to the project reinaln in substantial conformance with the project. S - Page 1-1 __ r arls bad A 'I \ETERALHILL( / ) its - EORALJK -J - \ # \ '\ / --= •,.. e IL .,• -L : ,/ •J \o /Palmquist Country Uw, '. / • I., tI \)Vc --4N\,\ /i • ___ r sewage Disposal 8. —Z~v V . . 4NAoN SlIuPpill.ngli~j ROAD Buena Via T11 S :IS KNOW iS AVE __ _ R :i '•4 ' v. 40 Eli h LeP ar Magnolia sch Valley ir High Schs t, 01 \ _St Pit jIz - • ffrson .) •i •. L')\ \ flflb ) \\ -? / - Scale: V = 2000' Figure 2 r Source Source San Luis Rey 7.5 Minute Quadrangle Vicinity lviap S Sèc AFFECTED. ENVIRONMENT The Jefferson Street Bicycle Path project consists of a street widening to accommodate two bike paths The widening of Jefferson Street will require the placement of fill adjacent to Jefferson Street encroaching into Buena Vista Lagoon along the lagoon's southern margin, west of 1-5 A maximum of 01 acre of direct wetland impact would occur. While implementation of the Project would affect sensitive biological resources, the revegetation plan included herein, is I intended -to'providel compensation to sensitive resources for both direct and indirect potential impacts, as identified below. A"biological' technical report hasbeen prepared to addresspotential impacts associated with the widening of Jefferson 'Street to accommodate the proposed 'bike paths. The purpose of that biological survey was to determine the nature and extent of the sites' sensitive biological I resources.,Sensitive biological resources are defined here as habitats, and plant or animal species that are liièd by'-'the- California Department of Fish and Game (CDFG) or the U.S. Fish and I Wildlife Service. (USFWS) or are considered depleted or declining locally. The area of potential 'impact or impact zone was surveyed on'February 18, 1991 by P&D botanist Elyssa Robertson and wildlife biologists Ray Vizgirdas and Doug Wilhck Previous to the biologist's survey, the limits of potential direct impact along the roadway's northern side were staked.,by a, survey crew. The impact zone was based on a 1 inch = 20 feet scale site plan provided.:by the City of Carlsbad. Vegetation was mapped on these base maps which were includ&'in the biological technical report. '. A wetlands'analysis was conducted and a boundary determination was made based primarily on hydrophytic vegetation doniinance and site :hydrology. Dominant vegetative components were noted along the entire length of roadway within the impact zone. These areas were plotted by segment, as designated by survey markers. TwO soil samples were taken along the proposed route within :the impact, zone;' one within the disturbed wetland habitat and one within the undisturbed.wetland habitat. A preliminary soils analysis was conducted as 'part of this' study due to the 'artificial nature of the fill material used to create the existing Jefferson Street roadway. Soil samples were taken primarily to locate the depth of saturated soil. Page 11-i :1 A EXISTING CONDITION I VEGETATION I Habitats along the proposed impact zone of Jefferson Street, from 1-5 to Marron Road consist of three ,types: disturbed, disturbed wetland and wetland hbitais (Figures. 3-8). Disturbed I habitats are defined as areas that are either barren or support non-native weedy or ornamental species On this project, disturbed areas within the impact zone include a small dirt path for pedestrians, barren areas, eucalyptus trees (Eucalyptus sp.), and slopes dominated by ice plant (Cab obrotus sp.). These areas appear to be continually disturbed through human activities and I were originally formed through construction of Jefferson Street The existing Jefferson Street appeas to have been constructed on artificial fill near the east end (Marron Road) and on a I hillside cut on the west end near 1-5 It is unknown if wetland conditions existed beneath the roadway at the time of initial construction at the east end of Jefferson Street. The area has been disturbed long enough however, that regeneration of wetland habitat is unlikely. For the purposes of this report, areas not supporting native plants are considered disturbed. Under 'federal regulations, wetlands are defined as areas that are inundated or saturated by I surface qrgrbund'watérs at a frquency and duration suffiôient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions Three factors are considered in the designation of wetlands the presence of I hydrophytic vegetation, hydric soils and wetland hydrology. A minimum of one positive wetland indicator from each category must be found for the -U.S. Army Corps of Engineers (ACOE) to I determine an area to be wetland (ACOE, 1986) Areas indicated as wetlands by all three factors dunng the rainy season may lack the indicators of hydrology and or vegetation during the dry I season, or the vegetation may have been altered or removed through human disturbance Such areas may still be regarded as wetlands by resource agencies For this project site these areas are 1 considered. disturbed wetlands. Disturbed wetlands are idefined by the USFWS in' the Unified Federal Method of Wetland Delineation as: . I Page 11-2 .1 PR0P0.iL C. 4 i90. eRt179 \ 6' A/IDE h'N/TE PER c4'ITAW'v3 - — --.----- I _- L. I • MCr'ov w cr 7YP/C9E 41t 1> r (iE V&7 2) -t vrk - I 'I Z~ 16 TyPE P- P/,v(.s1r0 g: c R.Q0 70 Q'A/ 9A'.9 V eo/f '09oi',9 v C IX'/T5v& r (TYPICAL) (Tye) - LEGEND Limits of Impact Disturbed Wetland Disturbed Habitat1 40 Source: Keitner & Associates. Inc. Gzl_ ~ . Figure 3 Wetland Delineation of Jefferson Street Widening PIA Dh C:5 3k3'\ Thi\ 7R9A/3I 4! _ qff HJ . t'. — — - Cal CO3rRT PR (5E t -. w,oe w.wre PCR c41LreANf, P16;33 13 PRO/I (I Z Th (r?PiCL) rvpc f•f C1A,CArO' - 110 j6ø - - Itoo 17 _•'1 00 OP to 00 - . 14 OVq r - VqPC AN - -.-••• 00 P6 0.2t - ;;T -- LEGEND Limits of impact* Disturbed Wetland Disturbed Habitat 0 20 40 GO Fiaure 4 Wetland Delineation of - . Jefferson Street Widening 1. fo'NrCRv/5 IMF (TYP.) - - ' _.j,r_ ~ _ - eu -- 1 - --_ J6EdO I . Z. W (X/T YE T OiV6 V Tip( r c TA I L . C K S3 .. / kic LEGEND Limits of Impact Disturbed Wetland Disturbed Habitat; o10 40 (,0 Source: Keitner & Associates, Inc. Figure 5 VVet land Delineation of (7j JeffersonStreetWidening frM\ '1 TvrcF' rifL/A/(AIO' — 6g 7V DRR/A/ II/ &OQO/J/1Y(/%1/AJ.) 8f/5 £AN6 pAVCMC('T PAMIT PL AAJ rLr-9 CAL MAN" P/ AL ) r (TY f I . - — — - — ,;. s_,joPj,_'a — — — — — — — — a%, a 15-53, c4?.c.!c Cr,0 -- - - - - • - C5c -zer e A a - -.--------__I "i ?o \ 4y — •- — - •-• - • - - - • -S r— ' r''-- ' . I - r i••- i 41 - I c LEGEND Limits of Impact Disturbed Wetland EIII Disturbed Habitat 0 20 dO C.O -- -T± -• Source KeUnr& Associates igure6 IncC Wetland Delineation of Jefferson Street Widening 111'i 11 A\\ bi? F' & ts ize I. q LEGEND --- Limits of Impact Wetland LII Disturbed Habitat o 10 40 so Source: Kellner Associates. Inc. Figure 7 Wetland Delineation of Jefferson Street Widening ' W/P l N FI6.3 r7 pe CAt- V T j F-FER SON f Roea5w - tJCe c T; —V VLC Y. kA Ch Ch r Ch 6'fLItEAT0 \ (IOO'II.IT6RVAL' (rye) - . . Wit REAfOV6 Cp5l PAINTED ARoWvY ..•----------- -5-,--- .... - - - _ OV8 93fr f I _--- I c-yi',T - -- r1' C,''M - • 2' _--- N 37 5' - .- -T . 34 41 __•_•44944• j5T.A.0 . . TO Yet OVV gEM 9rjiP6 - A c 4r 5CRM poP05-1 . -5 LEGEND Disturbed Habitat 0 20 40 (..0 Source: Keitner & Associates,-lnc. . Figure 8 Wetland Delineation of(7zl 1 . ___ Jefferson Street Widening I . 1 ; I I I "Disturbed areas include situations where field indicators of one or more of the three wetland identification cntena are 'obliterated or not present due to recent change" OR "wetlands that, under natural conditions are simply difficult to identify, such as wetlands dominated by upland species, wetlands lacking field indicators for one or more of the technical cntena for wetlands, and wetlands occurring on difficult to identify hydric..soils" The disturbed wetland within the impact zone of Jefferson Street does not have the indicators of 'hydricsoils or hydrology. It is, however, dominatedby (greater than 50. %) facultative wetland I plant species, arrow weed (Pluchea sencea) Facultative wetland plants are defined as plants which,usually occur in w'etlands (estimated probability 67% to .99%), but are occasionally found in non-wetlands (USFWS 1988) The understory of these areas are either bare ground or a weedy assemblage of ice-pl'ant and other non-native species. - Wetlands within the study area were areas which exhibited a'marsh growth, contained sandy soils and soil moisture was within I two inches of the surface Plants dominated within this area included cattails (Typha lanfoha), American bulrush (Scipus amencanus) and spiny rush (Juncus acutus var sphaerocarpus) Sandy soils, though not1. a true anaerobic soil, is listed on the USDA list of hydric soils (USDA 1985) In addition, after taking two soil samples within this area, soil moisture as noted within two-inches of the soil surface. To meet the hydrology criteria, soil moisture must be within six inches from the ..surfàce (Wetland Training Institute 1989). Sensitive Habitats a.nd Plants Sensitive habitats are"those which are considered rre within the region, are listed.-by the California' Natural Diversity: Data Base, or support sensitive plants or animals. The only sensitive habitat onsite is the wetland habitat along certain portions' of the proposed bike path. Wetlands are subject to the Clean Water Act permit provisions regulating their filling and may be subject.to the Rivers and Harbors Act, as well.. .These are enforedby:the ACOE andthe'U.S Environmental Protection Agency, with technical input from the U.S. Fish and Wildlife Service Wetland habitat is naturally, limited and remaining acreages are important island,: habitats for migrant birds. Many bird species are restric.tedto wetland habitat and are dependent on it for breeding. Overall, wildlife diversity is normally higher in wetland areas than in surrounding Page 11-9 1 Thabitats Approximately 009 acres of disturbed wetland habitat and approximately 0 012 acs of wetland habitat exists in the study area I High interest plants include those listed by the U'S. Fish and Wildlife Service (USFWS, 1985), California Department of Fish and Game (CDFG, 1985) and the California Native Plant Society (Smith and Berg, 1988) The CNPS listing is sanctioned by the California Department of Fish and Game and essentially serves as its list of "candidate" species for threatened and endangered status Table 1 of Appendix B (Biological Resources Technical Report) lists the sensitive plant species known from the area, but not observed One sensitive plant species was noted onsite spiny rush is listed by the CNPS as a plant at limited distnbution (List 4) This plant occurs m the marsh habitat of the wetland Apçroximately five individuals would be directly impacted by the proposed project WILDLIFE Wildlife species detected dunng the survey are listed in Attachment B of the biological resources technical report None of the animal species observed or detected within the project area is listed as endangered or threatened by the U S Fish and Wildlife Service (USFWS) or the California Department of Fish and Game (CDFG) Sensitive wildlife-'species likely to occur in the vicinity are summarized, below in Table 2 of Appendix B, the iólogical Resources Technical Report. SITE-SOILS According to maps prepar1 for the Soil Conservation Service (1973), soils indicated for the project area are identified as "Terrace Escarpments" This soil type belongs to hydrologic group D and represents soils with highest runoff potential These soils are composed pnmanly of clays that have a very slow infiltration rate, a high shrink-swell potential, a high permanent water table, and are shallow` over nearly impervious matenal Terrace Escarpment soils are highly erodible, have severe limitations for use, and if used, require protective and corrective measures to be taken before and during their use. •. Page 11-10 It The results of preliminary soils analyses conducted for the revegetatlon area indicate that soils in this area were slightly alkaline (7.1--7.7 pH) and high in nitrates and soluble salts (electrical ' conductivity was measured at 20±) Phosphorous and potassium levels were in the low to normal range, while ti-ace elements measured.slightly low. The soil report suggests that a soils textural test be conducted to determine more accurately t h e I percentages of silt, sand, and clay present in the soil, as ,well as the exact soil type This test, it was indicated, would reveal additional information about soil compaction and water p€rmeability, and what amendfrients, watering, and fertilization may be most appropriate. I It was also recommended that 150-200 pounds of gypsum (soil amendment) per 1,000 square f o o t area be used in an attempt to neutralize the high salt content of the soil However, this bl a n k e t approach to soil augmentation should be avoided until further tests are conducted, includin g toxicological,, and hydrologic-test',--to ascertain,the potential short and long-term effects of gypsum . application to the lake's water quality and wildlife. SITE HYDROLOGY S .5 :The proposed project site is located within he Carlsbad Hydrographic Unit and portions of t h e project may he within the 100-year flood plain However, '.,a detailed hydrologic study was not conducted for this project, as it was not within the scope of the report Drainage in the vicinity of the .project, in general, moves in a westerly. direction and collects in the lagoon. The l a g o o n has been closed to the ocean since the late 1960s.The source of water in the lagoon is a combination of natur "Ali runoff from surrounding urban development and stream flow from Buena Vista Crek.. S 1 Page 1141 I' A.'. POTENTIAL PROJECT IMPACTS The impact analysis was based on habitat within the impact zone and indirect impacts associated with drainage into the 4agpon. Acreage analysis was not conducted for areas outside the impact zone The proposed project would directly impact 09 acres of disturbed wetland habitat and 01 acres of wetland habitat for a total impact of 0 1 acres Impacts to wetland habitat, though not large, I are considered significant by the USFWS and CDFG Impacts associated with the loss of spiny rush are norconsidered significant, at this time, due to this plant's low sensitivity status and the I abupdance of this species within the protected lagoon habitat The remaining area within the impact zone, as shown on the attached plans, is considered disturbed habitat Impacts to this area is not considered significant. I Potential indirdct impacts to the habitat and wildlife of the lagoon associated with the road widening are expected to occur Potential indirect impacts which may occur include (1) increased jollutant discharge of petroleum based products from the roadway into the lagoon due to runoff,includmg oil, grease and/or gasoline and, (2) increased human encroachment into the area ,due to use of the area by pedestrians and recreational users These impacts are considered I potentially significant based on the amount of increase for each The impacts identified above would be reduced to a level less than significant through implementation of the mitigation measures provided m the Biological Technical Report and as N. 0 1 desáribed in Section III of the mitigation plan. Page 11-12 Section III RECOMMENDED MITIGATION MEASURES CONSTRUCTION MONITORING An important aspect of the total mitigation program is the construction monitoring phase of the project This is essential to the project to ensure that the revegetation is installed per the approved.plans and specifications, and to ensure that additional impacts beyond those identified for this project, do not occur monitoring monitong biologist will be onsite throughout the initial construction project, including staking and grading, to ensure potential direct and indirect impacts to sensitive plant and wildlife species are avoided The construction monitoring phase includes pre-construction meetings, landscape pian review, site inspections during staking and grading activities, as well as weekly site visits to observe implementation of the site's revegetation plans. PROCEDURAL PROGRAM. GUIDELINES Prior to initiation 'bf any construction activities, meetings shall take place between all parties involved, to discuss and outline the monitoring program and to establish the responsibility and authority of the participants Those included at these meetings should include City staff, the project biologist and monitoring biologist, a CDFG representative, the construction supervisor and grading foreman, the landscape architect, and the landscape installation contractor. The purpose of these meetings will be to provide communication between the involved parties, establish an effective reporting system prior to any monitoring effort, and to ensure that all parties have a clear, understanding of their responsibilities, add-What-the established chain of communication will be for this project. . •. Discussions at these meetings should focus on understanding the purpose and function of flagging and staking of the daylight line and the limits of grading, the identification of sensitive resources, areas of the site to remain undisturbed and those to be affected, the areas to be revegetated, and the establishment of a communication hierarchy, (Figure 9) All project participants will have a clear understanding of the importance of the adjacent lagoon habitat to state and federal agencies. Page 1114 Projec t Commu nication- Process Biological Wm- Monitor Landscape Architect Resource Agencies Figure 9 .4 P&D Technologies I The monitoring biologist will communicate directly1 with the City's engineering staff (project engineer and site construction supervisor) Copies of correspondence between all parties, as I identified above, shall be sent to the project manager at the City's Municipal Project's Division It will be the responsibility of the project engineer to ensure that issues raised during the construction process by the biologists, landscape contractor, landscape architect, construction supervisor and/or grading contractor are addressed in a timely and appropriate manner. I Unresolved issues will be addressed by the City's Engineering Department I The limits of impact (daylight line, not right-of-way) will be clearly staked and flagged by a survey crew in coordination with the project and monitoring biologists immediately prior to ":con1menëement of grading and clearing activities. 'The construction foreman will be informed by the biologists of the sensitivity of the adjacent lagoon habitat and that any impacts to areas 4.1 outside the impact zone will be prohibited The project and/or monitoring biologist shall have the authonty to halt or otherwise delay the site's activities for not more than 24 hours, if I additional impacts to sensitive resources occur daring the construction process The purpose of this measure is to provide the City with sufficient on-site supervision to ensure additional impacts do not occur, and "provide adequate time to notify appropriate City staff of potential additional imp'acts. Ifimpacts occur inadvertently, rehiedialmitigation and notification of CDFG, California I Coastal Commission and ACOE will be required Any additional mitigation measures will be O determined and. agreed upon in' advance of a resumption of construction activities. O , The monitoring 'biologist, will conduct onsite construction, monitoring activities twice-weekly during initial grading and weekly thereafter to ensure construction activities do not affect biological resources outside. tii' Dr6iec't'§ specified limits.. Monitoring will be performed by 'biologist quaIified in" assessing. proper revegètation implementation and identification of offsite impacts, should they occur. Information from these, as well as other site visits, will be O incorporated into interim reports prepared for the City of Carlsbad and the permitting agencies 'on ambnthly basis. 1, 0 I .,. B EXOTIC TREE REMOVAL A number of exotic plant species situated within the existing habitat along the south side of the lagoon have been targeted for removal, as part of this mitigation plan Exotic plant species offer I little in the way of "appropriate," or useful habitat for wildhfe using the lagoon and its many environs The removal of these species will allow native, wetland-associated vegetation to I develop which '.'ill enhance existing habitat in this area I Those species identified for removal or to be cut down are listed on the landscape plans provided With this mitigation plan document These species include castor bean, myoporum trees, giant I'• ,' reed, and date palm trees The 'location' and number of each 'of these species is' provided' in the landscape plans (Map Pocket No,,.1) Exotic plant removal will be performed in accordance with the directions specified in the enclosed landscape plans and as provided below All exotic plants to be removed or cut down will be flagged by the project biologist I . The preferred method of removal or cutting down of exotic plants is by hand Plant material to be removed includes roots, suckers, stumps, and volunteers, unless otherwise noted on the landscape plan or as directed by the landscape contractor or project biologist Hand removal' shallináludethe use of smállhandtools (axe, polaski, chain saw, etc.,). Larger:piecès of plant material, such as .stumps, shall be removed using chains attached to vehicles :located outside the lagoon and within the impact zone. 1 The elimination of exotic plants will be conducted under the supervision of the landscape architect and monitoring, biologist. The elimination of giant reed species may. include hand application of herbicides; no spraying will be permitted and the application of the herbicide will be monitored by the landscape contractor and monitoring biologist ,Page 1114 All material will be removed from the lagoon and disposed in an appropriate landfill or turned ,iiito'amulch to be used elsewhere (not near the lagoon or other riparian resources). 'C. REVEGET-ATION 'AND MONITORING•• S The purpose of this revegetation plan is to ensure that potential impacts to wetland resources resulting from project implementation are sufficiently mitigated to reduce such impacts to a level less than significant. Approximately 0 3 acres of ripanan habitat would be restored under this revegetation plan for impacts to 0.1 acres of disturbed wetland and wetland habitat It is the intent of this revegetation plan to replace the existing habitat type with in-kind habitat An area of the lagoon adjacent to the existing parking lot has been identified as suitable for the revegetation effort (Map Pocket Nos 1-7) Revegetation of this area will enhance and recreate riparian. habitat that cannot occur there naturally due to ongoing pedestrian traffic. SITE"PREPARAflON "Onsite soils 11 be scarified or roughed-up in 'areas to be hydroseTeded. Soil amendments may be "added to specific soil material used' 'within the: revegetatiön area where restoration and recreation is to occur. Soil amendments, as specifiedby the landscape architect and the project biologist .shall include only those. recognized' as appiopriate for use in development of riparian habitats. It is expected that wetland conditions (y"soil development), as needed for 'riparian habitat creation, will develOp naturally over time due to the site's existing hydrologic character, thereby notreqüiring long-term irrigation orfertilization. The soils analysis for the project showed".a significant presence of nitrogen and phosphorous. Therefore, only minimum fertilization may be' required. Generally, it is suggested that broadcast fertilization with nitrogen 'or phosphorous-ba,ed commercial fertilizers be avoided because such 'practices favor weedy, exotic species development: over natives in Southern California. However, the landscape plan suggests the use of fertilizer tablets placed below the soil surface within the rootball of each container specimen. It is 'anticipated that this fertilizer will' be depleted within ninety days and further fertilization will not bekequired. A broadcast fertilizer for the hydroseed shall not be used. :1 Page 111.;5 1 I LI The planting design specifies the steps required for the restoration of existing disturbed and undisturbed wetland habitat adjacent to the lagoon The ultimate goal of the mitigation program is to restore, as well as recreate, riparian habitat along Jefferson Street through simulation of the physical structure, species composition, and the ecological function of the existing undisturbed habitat Selection of plant species was.determined largely by existing species composition adjacent to the lagoon and commercial availability. The mitigation area will consist of three zones of vegetation, each with species selected in accordance with the physical characteristics of the site facultative wetland (marsh), facultative (npanan, scrub), and upland species (in order of hydrological requirements). PLANT SOURCES Lead Time It typically takes approximately six month to one year from the date of plant material collection to produce one-gallon container stock, provided collections are made at the appropriate time of year. However, some needed plant materials may already be available at native plant nurseries Use of these nurseries and their'existing planStocks.wi1l avoid the need for "contract growing" from seed and cuttings: taken from the project site. If seeds are to be collected from onsite, they should be taken the year previous to implenientationof the hydroseeding effort. It should be noted that the preferred method of revegetation is to use seed or cuttings from existing native plants onsite to maintain.,genotypic characteristics and potential adaptive gene variations, where feasible The use of non-indigenous, native plant materials in revegetation programs can result in problems which include failure to survive or establish, displacement of indigenous species, hybridization with indigenous species, introduction of inappropriate taxa, and the unintentional introduction of other organisms, including pathogens and pests (Recon 1991) As a result, plant materials to be used in any revegetation plan should be derived from materials local to the mitigation site, whenever feasible Whenever indigenous plant materials are not readily available commercially, advanced planning and increased costs may be required to Page 111-6 revegetate with such materials. Sources for cuttings and seeds should be identified by the landscape je architect, proct biologist, or other revegetation specialist, as designated by the City. 1. Hydroseed The composition of the hydroseed mix will be consistent with the species composition previously recorded for the site in the Biological Technical Report This mixture will include both shrub and herbaceous plants (Table 1 and Map Pocket No 2) Because some material will establish quickly, it is expected to provide some erosion control and reduce potential weed problems They will also add to the organic component of the: soil. TABLE 1 : NATIVE HYDROSEED MIX., Seed Pounds per acre Artemisia douglasiana (Douglas Sagewart) 2 0 I Artemisia califormca (California Sagebrush) 3.0 Anemopsis cahfornica (Yerba Mansa) 3.0 Bacchans pilulans var consanguinea (Chapaarral Broom) 1 0 Eschscholzia cahformca (California Poppy) 5.0 Festuca megalura `Zorro' (Fescue) 4.0 Frankenia grandifoha (Alkali Heath) 20 Haplopappus venetus (Coastal Goldenbush) 4.0 Hehotropium curvassavicum (Wild Heliotrope) 2.0 Heterotheca granchflora (Telegraph Weed) 20 Lasthenia chrysostoma (Dwarf Goldfields) 2 0 I Lupinus Succulentus (Arroyoiupine) 6.0 Miniulus puniceus (Red Monkeyflower) 3.0 I Plantago msulans (No Common Name) 15.0 Total ' 64.0 Container Stock Container stock to be used in this revegetation program is identified in the landscape plans (Map I Pocket No 2) Many of these species will establish quicker and more successfully this way. Several of these species include mulefat, arroyo willow, and four-winged salt bush Species I arrangement: and densities are described below and on the landscape plans, and were determined on a species-specific basis. ANk Page 111-7 .1 Plant Densities Arrangement and Spec iesComposition Plant densities and arrangement for container species listed in the landscape plans (Map Pocket Nos 1-3) were determined by the growth habits of each particular species and its location within the overall landscape plan Marsh species plants have been placed in or immediately adjacent to the lagoon, itself. Other riparian scrub species and trees were located at higher elevations (upland areas) and the hydroseeded mix, as described in the landscape plans, contains a mix of both upland and wetland plant species Based on the amount of water they receive, it is expected these..plânts will compete with each other'for location, nutrients, and dominance within the applied areas. The hydroseed slurry will contain the listed native seed, mix at 64 pounds per acre, plus 2,000 pounds per acre of cellulose wood fiber and 160, pounds per acre organic, soil stabilizers. This' hydroseed 'slUrry will be covered with an overseect mix containing 10 pounds per acre of 'California buckwheat; No hydroseedmixwil1 be sprayed within two feet of the lagoon' water's edge, and'no runoff of fertilizer or' hydroseed slurry will, beaflowed into the lagoon. The species composition of the hyciroseed mix, as well as the container species used in the revegetation plan was determined by the existing onsite native species composition, as well as the commercial availability of these plant materials. INSTALLATION For native plants, the" best survival rates oêurwhei application of hydroseed or planting of container stock is completed in the late fall or early winter (November through February). This. would take' advantage of the"seasonal rain fall.. Installation should -be done concurrent with construction;, If. this is not within the appropriate planting period, as suggested above, then supplemental water requirements "for the species should be evaluated by the landscape architect and monitoring biologist. Page 1114 I IRRIGATION As rquiredii. by the City of Carlsbad, the revegetation plan will include installation of a temporary Irrigation system The goal of this native revegetation program is the creation of habitat that is self-supporting and will persist over long penods of time without additional human involvement, however, a temporary Irrigation system is deemed necessary Irrigation rates and quantities should be dterimned by the landscape contractor, in conjunction with the landscape architect and project biologist Should the goals of this program not be attained within a reasonable amount of time, the City of Carlsbad may require modification to the proposed irrigation schedule Supplemental irrigation will be permanently discontinued after the project biologist and landscape architect determine that the restored habitat is self-sustaining EROSION CONTROL Prior to project grading, the project biologist and landscape contractor will evaluate the revegetation area for existing erosion problems and identify areas with potential erosion problems The City staff and the project engineers will be notified, as necessary, for authorizing any remedial measures to be conducted The following erosion control standards should be met before and during revegetation monitoring: (1) all gullies shall be repaired, seeded, and mulched, and the source of the erosive flow redirected or restricted, (2) all nil and sheet erosion areas shall be repaired, seeded, and mulched, and (3) all exposed soils capable of eroding, as determined by the above, shall be seeded and mulched using an appropriate native hydroseed mix, such as that recommended in Table 1. MAINTENANCE AND MONITORING Maintenance and monitoring of the revegetation site will be..required after installation of vegetation, to ensure habitat establishment and determine compliance with success criteria It is anticipated that maintenance during establishment will be pnmanly the responsibility of the City of Carlsbad or its agent, with input from the project biologist Page 111-9 I I Maintenance The mamtenance program has several goals 1) monitor the physical functioning of th e I r r i g a t i o n system to ensure it remains operational throughout its planned use and to identify needed repairs or, , any, 2) replacement o f dead, dying, insect infested, or diseased plant malfundtions if materials, 3) repair any forms of vandalism or, accidental damage to irrigati o n , f e n c i n g , o r ' restoration materials, and 4) removal of invasive weedy, species within the mitigation restoration area All maintenance activities shall be under supervision of the project biologist t h r o u g h o u t the five year mitigation program Maintenance inspections shall be conducted q u a r t e r l y f o r t h e first two years, and twice yearly, thereafter, or as needed to perform 'the above- m e n t i o n e d maintenance tasks. ' Monitoring : Qualitative Monitoring The qualitative monitoring program has several goals, including qualitative ev a l u a t i o n o f t h e plantings and irrigation, identification of pest, disease, and vandalism, determinat i o n o f p l a n t survival, and control of competith'e, non-ii'ative'egetätion. 1 The irrigation system should be checked routinely until plant establishment has be e n d e t e r m i n e d by the landscape contractor, in conjunction with :The project biologist. Irrigation lines will be reviewed during each of the 90 day inspections If any lines are in need of repair, t h e c o n t r a c t o r will, be notifiect within seven, clays and the problem will be corrected wit h i n t w o w e e k ' s . I n addition, if any vandalism occurs, such as illegal dumping, trampling by pedestrians or other inadvertent harm to , the specis then• these problems',will be evaluated and resolved as. soon as possible. .•' .• A visual inspection 'of all plant materials will be made by the, landscap e c o n t r a c t o r , i n consultation with the project biologist, on a monthly basis for the first six month s f o l l o w i n g installation, with visits every 90 days thereafter for the remainder of-`-the first two years. All losses in excess of 10 percent for the first year will be replaced in-kind by t h e l a n d s c a p e contractor, unless it has been determined by the project biologist and landscap e a r c h i t e c t t h a t u s e of another species and/or other stock size would better achieve reveetation goals Thereafter, plant matenals would be checked twice annually for the remaining three years by the project biologist, as part of the technical monitoring and assessment Replacement plantings would be performed by the landscape contractor under direction of the project biologist each fall or winter, as necessary, to achieve a survival tatOf 80 percent for year 2-5. Weedy, non-native vegetation will be removed, as required by the monitoring biologist, to prevent adverse competition within the revegetation area Specific species identified for removal in the riparian habitat include all tamarisk (Tamanx sp), giant reed (Arundo donax), tree tobacco (Nicotiana glauca), castor-bean (Ricinus communis), and/or pampas grass (Cortaderia sp) which may develop. Additional non-native species, as identified7 by the monitoring biologist, may also be targeted for removal. Quantitative Monitoring A five-year quantitative monitoring program will be àonducted by the project biologist, in conjunction with the above qualitative monitoring program. The,-quantitative monitoring program is desigped to gather data on the success of plant establishment, habitat development, and to formulate plans for remedial actions. Monitoring wifi be'.. conducted by a biologist with experience in revegetation programs and commence following completion of planting and hycfroseeding operations. Quantitative analysis shall consist of measurements using six, fixed 1 by 1 meter quadrants (two quadrants within each habitat type). Measurements in the quadrants will include height and cover for shrub species and groundcover for herbaceous species. The'percentage. of.irwaSive exotic species which develop during the five year monitoring period will also be determined Quadrant measurements will evaluate percent cover of the hydroseed mix as it geriflinates, using a grid system All trees and shrubs within the revegetation area will be measufed to ensure continuous growth during the five year monitoring program: measurements will inClude tree height, girth and crown cover. I Monitoring Schedule - Appendix B of this 'report outhnes the schedule for monitonng of the revegetation project over a five yearpenod Quantitative analysis will be conducted quarterly the first year, twice annually the second and third years, and annually, thereafter All qualitative monitoring will b€ conducted quarterly each year, unless remedial action is required Thereafter, monitoring may occur more often depending on the extent of remediation requires Annual reports will be completed each year for total of five ports., Letter teports will be subtted after -each monitoring period. Should anyremdial action be required, the City of Carlsbad would be notified prior to corrective actions being taken Remedial actions required would be summarized in each annual report D. PROTECTION OF THE LAGOON The restoration area, as well as the entire south shore of this portion of the lagoon east of 1-5, should be protected from vandalism and other human encroachment through placement of a permanent, aesthetically-designed fence This fence should be designed in accordance with City and CDFG guidelines to prevent access to the open spaces adjacent to the south shore of the lagoon by vehicles, pedestrians, and those who would illegally dump debris To protect the lagoon from off-road bicycle:and pedestrian encroachment, signage may be required. Aclearly visible sign system should be installed along Jefferson Street to educate the general public regarding the reveetation effort in progress and the sensitive nature of the lagoon habitat. This fence will be erected and maintained by-the City of Carlsbad or its designee. It is suggested that this fence èdësigried "'and iñstalledto serve more than just a protective function.' The fence should be created to provide —a supplemental, aesthetic character to the area, without detracting from the natural setting of the lagoon. It is further recommended that fence design glow for viewing of wildlife and the lagoon itself. The Buena Vista Lagoon Nature Center should be consulted:regarding incorporation of design features which would augment existing facilities located around,the lagoon. Recommendations for indirect, impacts associated 'with silt and pollutants from 'the widened ràadway and increased pedesthan traffic includ&th'e installation, of facilities to limit both of these effects. The first may be controlled through the use of a gravel filter at the storm drain inlet Page 111-12 -. •. •-' •. .: ... Iuluu 6 THICK MAXIMUM* 12' THICK SANDY SOIL THCROUD - AJ - aJT. SI U tA.R TO 7DPDw. COVER PLv'Th'C - IC ASPHALT -cR8 & CUR / PActMD:T 1H PVC PIPE' /' SORS DwC C- S. / 'TTDE C CURB k CA fDIRECTON TO I I - ' FLOW ---- -ri o 1' GRADED 1.0 CRATE ,- S..-Op z- y;' I F1LTR FASRIC P:?E - MIN, -. - JJ,JP -ROOTSHaD SECTION A-A. TS 'I SOUD PIPE THIN ' - iO' OF TREE.ELL s O.C. S-iCED 4 DI.,. PV., P1'z. O I.kASJr.:D ON _____________ .1 ___________________ •\' •.. EACN SDE. 10. -.5 SECTION B-B S S , NTS ' AU. 'PVC PiPE SHAll MEET THE PRO\IS1OS OF S L SECTION 207-17 OF THE STANDARD SPEC1CA11ONS S ' S , FOR PUBUC WOKS CONSTRUCTION. S , " Aft PVC PIPE JOINTS SHALL SE ELASTOMERIC ±J GASKET rIPE C.ZAl-OUT. SIMILAR10 SORS OW. 5-3, ' . , e. EXT U$Z PVC PIPE AN CUlT . STORM DRAIN S 5 y OT tiarisDau . S •- - S ' S Figure 17 - S • - 5 5••••'• .. S ____ Design Concept Urban Pollutant Gravel Filter APPENDIX A I MONITORING SCHEDULE I Task Time line Responsibility Meetings Pre construction Foreman, Biologist, Post-construction Landscape Architect Annual Project Engineer 1 Construction Twice weekly to Biologist monitoring completion Exotic tree Construction period Landscape Architect removal Biologist I Revegetation I collect seeds/cuttings Six months prior to Landscape Architect (if needed) construction Biologist I irrigation Quarterly for first Landscape Architect two years, twice per Biologist year, thereafter I erosion control On-going throughout Landscape Architect construction and monitoring Biologist 1 periods I plant material Quantitative, quarterly for first year, twice Biologist yearly for years 2 & 3, and annually, thereafter . Qualitative, quarterly Landscape Architect throughout 5 yeaf monitoring Biologist period I I I I I I I I .BIQLOGICAL ANALYSISOETHE I JEFFERSON STREET RQAPAY WIDENING I I Prepared for I The City of Carlsbad 2075 as Palmas - . Carlsbad.CáJifórnia 92009 I I Project Manger Al Virgilio I : S Prep aredby: . .P&D eôhnQ1dgis 401 West A Street Suite 2500 I San Diego CA 92101 Attn: Elyssa 'Robertson. I. S. ,• . , .5 S , I Mar ch '1991 -.J -- S I I TABLE OF CONTENT I Page I INTRODUCTION 1 EXISTING CONDITIONS 4 I Vegetation 4 Sensitive Habitat and Plants 11 Wildlife. ...................................................... 13 Seisiflve Wildlife ........................................ .14 IMPACT ANALYSIS ............................................17 MITIGATION AND RECOMMENDATIONS.......... . . . . . . . . . . . . . . . . . 1 8 I LITERATURE CITED 20 1• List of:Figures 1 Regional Map . ., ...... 2 2 Vicinity Map .....................................................3 I . Biological Resources ....................................... 4 Biological Resources 6 5 Biological Resources 7 6 Biological Resources 8 7 Biological Resources 9 8 Biologièal Resources ...........................................10. I List of Tables 1 Sensitive Flora . .13 2 Sensitive Wildlife 15 1 Attachment A Observed.Flora .......................................21 Attachment B ObservedWildlife ................................... 22 INTRODUCTION This biological technical report has been prepared to address the potential impacts associate d w i t h the widening of Jefferson Street The biological survey was conducted to determine th e a r e a s ' sensitive biological resources Sensitive biological resources are defined here as habitats, a n d plant or animal species that are listed by the California Department of Fish and Game (CDF G ) or. the US Fish and Wildlife Service (USFWS) or are considered depleted or declining locall y . The proposed Jefferson Street widening project is located predominantly along the norther n s i d e of the existing Jefferson Street, Jefferson Street -currently exists as a busy two lane road immediately south of Buena Vista Lagoon The project boundaries are from Marron Road to th e east and Interstate 5 tq. the west (figures 1 and 2). The area of inipact was surveyed on February 18, 1991 by P&D botanist Elyssa Robertson and wildlife bi'd1ogists:RayVizgirdsánd Doug Willick. Previous to the biologist's survey the P& D land surveying árew marked and 'staked the lints pf'impact along the roadway northern side o f the roadway. The limits of impact were based, on 'a i!'.=20' site plan provided by the City of Carlsbad. Vegetation was mapped on these 1=20' base maps and are included in the attached map pocket .. . . All plants, animals and hãbitats'encountered during, the biological survey were identified. In addition birds observed adjacent to the zone of impact within the lagoon were also noted Wetlands analysis was conducted primarily on vegetation dominance and hydrology. Dominant vegetation components were noted along the entire length of roadway within the zone of i m p a c t These areas were plotted per segment as dèsignáted by the survey markers. Two soil sa m p l e s (using an Minch hand auger) were taken along the proposed route One within the disturbed wetland habitat and one within the wetland habitat A soils analysis was not conducted as part of this study because much of the soils encountered were artificial fill or soil The soil samples were taken primarily toiocate the depth of saturated soil. Temecula, Orange County S -' Riverside County' RedM. Res040s1 Falibrook . Camp - - Pendleton 0-N.H Lake Project Site a -- - s ValleyCenter, 0..H DO Vista Oceanside an L W ii 0 ao.n. 00O LgaDn - -Marcos - - Apoe H.diqnv.- S ' Escondido t. Ôarlsbad - Baliouiloa Llgaafl S - - - - San Oegoka - - Let. HOOP,, Ramona Encinitas - Resent,, r Lake Reman. Rancho 8ernardo Oq Sen Etjó Rancho Santa Fe - Lake - *tZ PDO.y CaytmtOa LagOon 0 - San O*eyaoo - Del ar. LOP. El C.P11A M,o Mesa. — LaCCOSantee : 52 - - La Jolla - - 8 Alpine --S - LOeeIand S 'Au0,,. - EiCaon 1YM'A I • aMe1 HLeo - ?' - - LC*. Cityat n - :r' Okay - :uIa Vista L0.' Okay II Otay Mesa - - Mexico ripuana - - - H H' :1 =)A : lP)> I / \ 'I t c - N if Fir~ P1 k K 11 AO" Fal Zqhu I! 1 7: 7 ri Center / - - - vis a /T11S 2 L I rA / I KNOW ES \Li RL I AVE I Ke Do 18 00 Ii IBY CARLSBAD N. ..PinePine Khr \ fferson O/9 I Sc/ !I ifl I II Figure 2 Scale: 1' = 2000' Source: Source San Luis Rey 7.5 Minute Quadrangle Vicinity. Map. I I . EXISTING CONDITIONS I Vegetation I Habitats along the proposed widening of Jefferson Street, from 1-5 to Marron Road consist of three types (Figures 3-8) disturbed, disturbedwetland and wetland habitats Disturbed habitats are defined as areas 1that are either barren or support non-native weedy or ornamental species. On this prOjectdisturbedareas within the zone of impact include a small dirt path for pedestrians, I barren areaseucä.lyptus trees (Eucalyptus sp.), and slopes dominated by ice plant (Carpbbrotus 1 . . sp.). • These;areas appear to be continuaIl' disturbed through human activities and were originally formed through construction of Jefferson Street The existing Jefferson Street appears to have :I been constructed- on artificial fill near the east end and n.a cut in the hillside on the west end. It is unknown whether or not wetland conditions occurred under the roadway at the time of I original, fill for construction at the east end The area has been disturbed long enough however, that:the regenerafionof wetland habitat is unlikely.. Therefore, for the purposes of this report, areas not supporting native plants are considered disturbed. Under federal regulations,-, wetlands are defined as areas that are inundated or saturated by surface or ground waters at a frequency and difration to support, and that under normal 1 circumstances do support, .a prevalence of vegetation typically adapted for life in saturated soil conditions..Three factors are considered in the designation of wetlands The presence of 1 hydrophytic vegetation, hydric soils and wetland hydrology.-. minimum of one positive wetland iidictor from each category must be found for the U.S. Army Corps of Engineers (ACOE) to determine an area to be wetland (.USACOE, 1986). Areas indicated as wetlands by all three factors during the rainy season'máy lack the indicators of hydrology and or vegetation during the - dry season, or the vegetation may have been altered or removed through human disturbance. Such areas may still be regarded as wetlands by resource agencies For this project site these areas are considered disturbed wetlands. Disturbed wetlands are defined by the USFWS in the Unified Federal Method of Wetland Delinetion as: "Disturbed areas include situations where field indicators of one or more of the three wetland-identification criteria are obliterated or not present due to recent 1-. change" OR "wetlands that, under-natural conditions are simply difficult to. I , .th'çj 4-Kz - 47Z2 . N - r OV - I frI9\ 9?\ Mfr n 6R,9AAE 70 €.9rA/ QA,WY [ ( 'eo,'1 9Dj9 V PEU6'(Ar0 ( 'irvqt ç (rye) I Mmk xTq &641M 7ZI 6 A'/DE IVN/TE iii, PtR C9L rEWAJ5 'Ila 6,33 - 24 'SO E (j 2) Cvzeec'r 7Y,—M--9e ('. LEGEND Limits of Impact Disturbed Wetland Disturbed Habitat 0 20 40 (10 _ - Source: Keitner & Associates, Inc. ruguw Wetland Delineation of UD Jefferson Street Widening 131 I 1A110 CXI-' i H n.e. nn N EX137 h in IN - A/EAI& c4Iv, (s4 - .g(. ti CAIN co3rRcr PCR c-se& 5h'5.r 2) LEGEND Limits of Impact Disturbed Wetland LI Disturbed Habitat zo 40 GO & Associates, rlyuleLl . Wetland Delineation of -- Jefferson Street Widening :G')V)) Jj / TVPI Ft OItbutAToR - 8 faf 7 LW.9/AJ .9 /9y foo'Ircv5rYe ti 3 (TYPICAL) - - - - - - - - - - - - - - - - - - - - - - - - - -' 4 R'800'- - - - N411 242 - - ) wwan -- , -- - - - 5mel'-e Ilk- 14 C. 415C C.447RWAIS CL -17-'e66 7- q / Ila LEGEND Limits of Impact IM Disturbed Wetland Disturbed Habitat: 0 0 - 40 (.0 3ourc: KeRner & Associates. Inc. iigure b Wetland Delineation of (7j Jefferson' Street Widening OMAUA~,\ — 6'4: 7V D4W/N ,q,J,çy / flftW ,E'O9DA/,9V (1% ivw) I (TYPICAL) ,r, /) 553 - -- I LEGEND Limits of Impact Disturbed Wetland LII Disturbed Habitat 0 20 40 (.0 Source: Keitner & Associates. Inc. Figure 6 VVetland Delineation of 9D Jefferson Street Widening i . r p(F(CCT0 7/ TA . lNT0' A" I5r . w x peM0 5X V ---. 14 t- ~ W WI . . ,ft jgy04 -\ .- k . -. - "S. .NO0 70 — — . 4 4 • S. - - ' . o - . :' .—?'516N TO xii-. /4EAP'. 170 16NAt, C" 71 LEGEND Limits of Impact Wetland Disturbed Habitat 0zo - 40 (_o - Figure 7 Source: Kellner 8 Associates, Inc. Wetland Delineation of __ Jefferson Street Widening &Z . I r~j 7 / 11 15"3 .5 -...' S.- / . -"ä•, A.COCRM EXI5T AC 86,qtvf 77'00 3\c C'N r f[r". 70 11 9 '2 \ -- PA/WT(O IOV(TYP ) OTA IN Cf, 33 54, SON 70 470, ------ -Th - 12 \ p npn AC JHegr / STRIFE p It, k9 / A757 -. -- ? c-----/--- 8 - R66 '70 a' LEGEND LII Disturbed Habitat 0 zo 40 G.0 F I Source: Keitner & Associates.-Inc. Figure 8 Wetland Delineation of J€fferson Street Widening identify, such as wetlands dominated by upland species, wetlands lacking field indicators for one or more of the technical cntena for wetlands, and wetlands occurnng on difficult to identify hydnc soils" The disturbed wetland within the impact zone of Jefferson Street does not have the indicators of hydncsoils or hydrology, It is however dominated by (greater than 50 %) of facultative wetland plant species , arrow weed (Pluchea sencea) Facultative wetland plants are defined as plants which usually occur in wetlands (estimated probability 67% to 99%), but are occasionally found in nonwetlands (USFWS 1988) The understory of these areas aret either bare ground or a weedy assemblage of ice-plant and other non-native species .1. , Wetlands within the study area were areas hichexhibited arnar gtowth, contained dandy soils and soil moisture was within two inches of the surface Plants dominated within this area included cattails ('rpha latifolia), American bulrush (Scir)us amencanu) and spiny rush (Juncus I acutus var sphaerocarpus) Sandy soils, though not a true anaerobic soil, is listed on the USDA list of hydric soils (USDA 1985) In addition,,,.'after taking two soil samples within this area, I excessive soil moisture was noted within two inches of the soil surface To meet the hydrology criteria soil moisture must be within six inches from the surface (Wetland Training Institute 1 1989) SENSITIVE HABITATS AND PLANTS I Sensitive habitats are those which are considered rare within the region, are listed by the California Natural Diversity Data Base, or support sensitive plants or animals. The only sensitive I habitat on-site is the wetland habitat along certain portions of the proposed bike path Wetlands are, subject to the Clean Water Act permit provisions regulating their filling.. These afe, enforced by the ACOE and the-U.S. Environmental Protection Agency, with technical input from the U.S., Fish and Wildlife..Service.,Wetland habitat is naturally limited and remaining acreages are important island habitats for migrant birds Many bird species are restricted -to wetland habitat and are dependent on it for breeding. Overall, wildlife diversity is normally higher in • •• • 41 1 I wetland areas than in surrounding habitats Approximately 0 09 acres of disturbed wetland habitat and approximately acres of 'etIjdhabitat exists in the study area. High interest plants include those listed by the U S Fish and Wildlife Service (USFWS, 1985), 1 California Department of Fish and Game (CDFG, 1985) and the California Native Plant Society (Smith and Berg, 1988) rn The CNPS Listing is sanctioned by the Califoia Department of Fish I and Game and essentially serves as its list of "candidate" species for threatened and endangered status Table 1 lists the sensitive plant species known from the area but not observed I One sensitive plant species was noted onsite Spiny rush is listed by the €NPS as a plant at limited distribution (List 4) This plant occurs, in-.the marsh habitat of the wetland Approximately five individuals would be directly impacted by the proposed project WILDLIFE Wildlife species detected ''during the survey are listed in Attachment B of this report Amphibians Though no amphibians were detected during the project survey, several species could potentially occur in the wetland environment of the, lagoon aiid upland habitats adjacent the project site I These wouldlinclude the Pacific ireefrog (Hyla regilla), garden slender salamander (Latrachoseps pacificus), bullfrog (Rana catesbeina), California toad (ufo boreas) and the California red-legged 1 frog (Rana aurora draytonu) I Reptiles I Only one reptile was detected dunng the project survey, the western fence lizard ($.celoporous occidthtalis). 'Other potentially occung species could include the side-blotched lizard ( stan'sbüriana) and the gopher snake (Pituophis mèlanolêuVcus). V i 12 - - - - - - - - - - - - - - - - TABLEi - - SENSITIVE FLORA KNOWN FROM THE AREA BUT NOT OBSERVED ONSIfE Status Name Federal State CNPS Comments Adoiphia Califomica None None List 2, 1-2-1 Threatened by urbanization Not expected to California adolphia" occur in study area Ambrosia pumila Candidate (C2) Nbhe List 19, 3-2-2 Found in dry, sunny places, along roadsides, etc San Diego ambrosia 100-600 ft Not likely to occur in study area Biodiaëa filifolia Candidate (C2) Endangered List 113, 3-3-3 Seriously threatened by residential devélOment "Thrëäd leaved brOdiaea" and off road vehicles Not likely, to: occur in -- study area. Ceanothus verrucosus None None List 2, 1-2-1 Threatened by development Not likely to occur -. "wart stemmed ceanethus" V -: in study area Dudleya viscida Candidate (Cl) None List 1B, 3-24 Found in dry rocky places below 1200 feet Not 'sticky dudleja likely to occur in study area -V Ergium anstulatum panshii yn Candidate (Cl) Endangered - List 1B, 1-3-2 Threatened by road maintenance San Diego button celery ' and off road vehicles Not likely to occur in study area Harpagonella palmen palmeri None None List 2, 1-2-1 On dry slopes and mesas below 1500 feeti Not 'Paltñer's grapphinghook' likely to occur, m study area Birds S 5; Forty six species of birds were observed in the lagoon and adjacent upland areas of the project area (Attachment B) Those detected immediately in the project area include the marsh wren (Cistothorus palustns), Ora (orzana carolina), black-necked, stilt (Himantopus mexicanus), common yellowthroat (Geothylpis trichas), yellow-rumped warbler (Dendroica coronata), red- winged blackbird (Agelaius phoeniceus), and song sparrow (Melospiza melodia) Mammals No mammals were observed on-site Potentially occurring, species in or adjacent the project area may include pocket gopher (Thomomys bottae), cottontail (Sylvilaus audubonii), Virginia opossum (Didelphis virginiana), raccoon (Procyon 1op) and deer mouse (Peromyscus sp) SENSITIVE WILDLIFE None of the animal species observed/detected within the project area is listed as endangered or threatened by the U S Fish and Wildlife Service (USFWS, 1985) or the Califorma Department of 'Fish and Game (CDFG, 1:980). Sensitive wildlife species reasànably' likely to occur are discussed below 'and summarized in Table 2 of this report. ' The only sensitive amphibian known from the general vicinity of the project site is the red-legged frog (Rana aurora draytonif), which is protected by the California Department of Fish and Game (1982) and is a candidate (Category 2) for federal listing as threatened or endangered This species frequents marshes, slow parts of streams, lakes, reservoirs, ponds and other permanent water sources It occurs primarily in wooded areas in lowlands and foothills, although it can also be found in grassland It is particularly attracted to freshwater marsh areas with sufficient vegetative growth to provide cover and prefers cool, flowing water. It is unlikely that the species occurs within the actual project site which lacks suitable habitat. S 14 -' " 5 '5 S• ' I - I - SENSITIVE WILDLIFE KNOWN FROM THE AREA Status - Name Federal State Comments/Notes Western Grebe None None Currently on a Watch List. Noted in (Aechomophorus occidentalis) B V lagoon American White Pelican None Species of special Numerous individuals noted in lagoon. Pelecanus erythrorhychos) concern - Osprey None Species of speâial One osprey was seen flying over. the (Pandion haliäetus) . . concern lagoon. Light footed California Clapper Rail endangered Endangered, fully Historically inhabited Buena Vista lagoon (Rallus longirostris levipes) protected None were detected dunng this survey California Gnatcatcher Candidate (C2) Species of special Project site lacks suitable habitat (coastal (Polioptila cahfornica concern sage scrub) Belding Savannah Sparrow Candidate (C2) Endangered Known to be found in northern edge of (Passerculus sand wichensis beldingo) Buena Vista lagoon None were detected iiithe- study area. California Least Tern Endangered Endangered Hisoncally inhabited Buena Vista lagoon - (Sterna antillarum browni) . .: None were detected during this survey . ':. nor are èxpeëted.. Snowy Plover Candidate (Cl) Species of special None detected/observed Potentially nest (charadrius alexandrilius nivosus) . concern• . in lagoon (sandbars). White faced Ibis Candidate (C2) Species of special Rookery sites are protected Nine were (Plegadis chihi) . . .. concern observed in study area. . Long-billed Curlew..Candidate (C2) 'None,None were observed in the study area (Numenius arnericanus) . . .. . . - . . . I The following species are associated with wetland environments the great blue heron (Ardea heroides] and the black-crowned niht heron (Nycticorax nycticorax) Both of these species were I observed in the lagoon and it is highly unlikely that they occur or even utilize the wetland habitat of the project site. S I The great blue heron is considered sensitive in San Diego County by Everett (1979) because it I nests regularly at very few sites and feeds in wetlands This species occurs throughout the year in the County and nests colonially in tall trees near wetlands Only three regular colonies are 1 known in San Diego County Point Loma, San Dieguito Valley and Lake Henshaw The black crowned , night heron though still fairly common, is considered sensitive be Everett (1979) because its known breeding colonies are few and vulnerable to disturbance The species I nests in freshwater marshes, willows or non-native trees 1 Birds of prey (raptors) as a group are considered sensitiv, because of losS of foraging areas, their vulnerability to human disturbance, their low population densities, and their position at the top of the food chain A red-tailed hawk (uteo iamaicensi) and an osprey (Ppdion ha1iaetus) were observed flying over the Buena Vista lagoon and possibly forage in the general area The project siteitself offers very little in the sense of foragingor nesting opportunities for either one of these. two species. .' . . S . I .5.. .. I .16'. 5 . I I IMPACT ANALYSIS I The proposed project consists of the widening of existing Jefferson Street to accommodate two bike paths The majority of the widening would be conducted on the north side of the street with I some widening on the south side near the intersection of Jefferson Street and Marron Road In addition to the actual paved areas of expansion, the extension would be designd to drain away I from the roadway and into the lagoon Therefore, additional acreage of impact would occur past the paved area. These areas as showA on the attachd,plans were analyzed forthis report as the 1:. impact zone. ' The impact analysis was based on habitat within the impact zone and Jndirect impacts associated with drainage into the lagoon Acreage analysiswas not conducted for areas outside the impact :1 zone. I The proposed project would directly impact 09 acres of disturbed wetland habitat and 01 acres of wetland habitat impacts to wetland habitat, though npt large is considered significant by the LJSFWS and the CDFG. Impacts associated with: the loss of spiny rush is not, considered significant at this time due to its low sensitivity status and the abundance of this species within the protected lagoPn habitat. The remaining area within the zone of impact as shown on the attached plans is considered disturbed habitat. Impacts to these areas are not considered significant. Indirect impacts to the habitat and wildlife of the lagoon associated with the road widening may occur. Indirect impacts that may occur include increased erosion due to additional surface water 1 runoff, increased pollutant runoff from the roadway associated' with oil,' grease and asphalt and increased usage of the area by pedestrians and recreational usets.' These ii'npacts' are 'considered potentially significant based on 'the amount of inrease for each. The determination ,of this increase is beyond the scope of this report. i 17 I..:' I MITIGATION AND RECOMMENDATIONS I If feasible mitigation is required (under. CEQA) for all significant impacts Mitigation can either reduce impacts to below a level of significance or partially mitigate impacts but not to below a '1 level of significance. Mitigation guidelines- discussed below are given in order of preference for the wetland impacts. Wetland impacts (disturbed and not disturbed .vet1ands) could be avoided through the redesign of the roadway project. The roadway widening could be constructed on the southern side of the road rather than the sensitive northern edge A large slope exists for the ,'majority of the roadway on the southern side which may create some constraints for construction on that side If the I roadway was redesigned for all construction to occur on the south side then no significant impacts to wetlands or disturbed wetlands would be expected to occur. If redesign of the roadway is infeasible then the following mitigation is required The limits of impact-will: be:clearly staked andflagged by asurvey crew and biologist immediately prior to clearing or grading. The consu-uctiQn foreman, will be informed by a monitoring biologist of the sensitivities of the adjacent lagoon habitat and any impacts to areas outside of the flagged areas will be prohibited If impacts occur inadvertently, then remedial mitigation will be required The construction of the roadway will be monitored .b'qualified terrestrial biologist knowledgeable of wetland habitats. To ,friitiate the direct loss of disturbed wetland and wetland habitat offsite enhancement is recommended. Enhancement -will include the removal of exotic trees (e.g., Canary Island palm, Eucalyptus trees-and giant reed) along the length of the roadway expansion and replacement .with native' wetland species (willOws Salix sp. and marsh species : Scix)us sp. , Typha sp. and Juncus sp.'): The exotic species for removal will be identified'by a qualified botanist, and removed by a landscape contractor or the City of Carlsbad. The renioval plan should"be approved by the CDFG (which manages the lagoon) before implementation. If the CDFG does not approve the plan than further mitigation may be required. 18 I I Recommendations for indirect impacts associated with 's.ilt'an& pollutants from the widened roadway and increased pedestrian traffic mclude the installation of facilities to limit both of these I effects The first may be controlled through the use of a gravel filter at the storm drain inlet This may be required as part..of the new Regional WaterQuality Control Board Order 90-42 1 limiting pollutants from storm drains into natural waters The gravel drain would presumably collect oils, grease and silt thereby limiting the amounts of these pollutants into the lagoon I These drains may require annual inspections to ensure they are functioning jroperly. If they are found not to be adequately collecting oils and grease from the roadway then remedial action must be taken by the City of Carlsbad To protect the lagoon from off-road bicycles and pedestrians ignage may be required A more clearly visible sign system may be installed along the lagoon to educate the general public regarding the sensitive nature of the lagoon habitat. I No further mitigation measures are required for the proposed project 1 1'' H I I I I , H 19 ,: 'H LITERATURE CITED American Ornithologists' Union (AOU) 1983 TheCheck-List of North American Birds 6th ed Allen Press, Lawrence, Kansas California Department of Fish and Game (CDFG) 1980 At the Crossroads A Report on the Status of California's Endangered and Rare Fish and Wildlife State of California Resources Agency, Sacrament, California. California Department of Fish and Game (CDFG) 1986 "Endangered, Rare and Threatened Animals of California." State of California Resources Agency, Sacramento, California. California Department of Fish and Game (CDFG) 1987 "Designated Endangered or are Plants" Summary list from Section 1904 Fish and Game Code (Native Plant Protection Act) State of Calithrnia Resources Agency, Sacramento, California. Everett, W T 1979 Sensitive, Threatened and Declining Bird Species of San Diego County San Diego Audubon Society "Sketches." Jennings, M R 1983 "An Annotated Check List of the Amphibians and Reptiles of California." California Fish and Game 69(3):151-17 1 Munz, P A 1974 A Flora of Southern California. University of California Press, Berkeley, California.. :. Smith, J P, and K Berg 1988 California native Plant Society's Inventory of Rare and Endangered Vascular Plants of California. Special Publication No 1 (4th Edition), California Native Plant Society. United States Fish and Wildlife Service (FWS) 1987 Endangered and Threatened Wildlife and Plants Federal Register 50 CFR 17.11 and 17 12 U S Department of the Intenor Wetland Training Institute Inc 1989 Field Guide for Delineating Wetlands Unified Federal Method WTI 89-1 131 pp U S D A 1985 List of Hydnc Soils for California 77- I ATTACHMENT A Observed EoralSpcies I .. Scientific Name Common Name 1 Ambrosia psi lostachya Western Ragweed Atriplex canescens . Shad Scale Avena sp. . .. Wild Oat I Baccharis glutinosa .. . . . . . Mule Fat Brassica geniculata Perennial Mustard . Brorñus rübens. . S Foxtail Bromé . I... Carpobrotus edule Hottentot Fig Dzsrzchlzs spicata Salt Grass Encelia california California Sunflower I Eriogonum fasciculatum Flat-top Buckwheat Erodiwn cicutarium Filaree I Eucalyptus camaldulensis Murray Red Gum Festuca megalura Foxtail Fescue Foeniculum vulgare Wild Anise Gnapthalium bicolor Bicolor Cudweed I Haplopappus venetus Coastal GoldenbusW Heliotropiwn curvassavicum . . . . Wild Heliotrope Ir Juncus acutus var sphaerocarpus Spiny Rush Mesembryanthemiàn crystallinum . Ice Plant Olea europa European Olive I Phoenix canariensis Canary Island Palm . Ricinis communis .. S • Castor Bean Salzx lasiolepis Schinus terebinthifolius Arroyo Willow Brazilian Peppertree .S irpus americana American Bulrush . Typha latifolia . S S Cattails I Atriplex semibacata Australian Saltbush Chenopodzum ambroszozdes Mexican Tea Frankenia grandzfoha A1k.li heath Heterotheca grandiflora Telegraphweed Pluchea sel-icea S : S Arrow-weed, :1 .lJrjja ürens , S .c Stinging Nettle ATFACHMENTB Observed Wildhfe Species Within Buena Vista Lagoon andWithin the Project Area Scientific Name Common Name. Recurvirosa americana American Avocet Fiilica americana : American Coot PIecanus thythrorhynchOs American White. Peli1can., Nycticorax nydflcdrqx B1áck-crowned Night Heron Himantopus mexicanus Bracknec,ked Stilt Bucepluila albeola Bufflèhead Psaltriparusmininius .Büsht' Geothylpis trichas Common Yellowthroat Phalacrdcorax auritus :Doüble-crested cormorant Podiceps nigricóliis Eared, Grebe Sturnus vulgaris. European Starling Anas strepéra .• Gadwal.l Ardea herodias ,Great Blue Heron Anas crecca Green-winged Teal Charadrius vociferans Kilideer Carduelispsaltria LesserGoldfiñch Aythya affinis Lesser Scaup Anas plaryrh5'nchos Mallard Cistothorus pal ustris Marsh Wren Zenaidamacroura . •• Mourning Dove Anas clypeata Nofterñ:Shove1er. Pandion halzaetus Osprey Podilymbus podiceps Pied-billed Greb .ButeO jamaicensis • • Redtailed Hawk Agelaius phoeniceus Red-winged Blackbird Oxyura jamàicensis Ruddy Duck Aphelocoama coerulescens Scrub Jay - Egretta thula • SiioWy Egret Melospiza melodia Song Sparrow Tachycineta bicolor • Swallow • Aechmorphorus occzdentalzs Western Grebe Wilsonia pusilla Wilson's Warbler Chamaeafasciata • • . • •Wrentit Dendroica coronata Yellow-rumped Warbler I,. w co Zcf) UJc 0< 00 L LL 00 >->- F-iF- X8.1 _— LU I'] VISITATION LU N ' 4"SHEETS 2 & 4 AREA 0 ' FOR )\\ \ / ENLARGEMENT..///,(\' MAR RON RD EESHEETS3&5 CITY OF CARLSBAD LANDSCAPE MITIGATION PLANS FOR :1I.]fi 1:14 I FOR ---- 1 /7 ENLARGEMEN 12.1 0 100 200 300 XlTlN UCALU TO ppZUNP TO S'-lZ' lAkr ANÔ\ - I SHEET INDEX SHEET NO. TITLE 1 Title Sheet/Plant Removal Plan 2 Planting Plan 3 Planting Plan 4 Irrigation Plan 5 Irrigation Plan 6 Planting/Irrigation Details 7 Specifications CITY OF OCEANSIDE CITY OF CARLSBAD WORK TO BE DONE GENERAL NOTES BUENA VISTA LAGOON W. E. +/- 6.8 ISTN( RIOINUS COMMLtNJl- "CAS1O AN" FL-ANTS TO F?' RMOV0. Graphic Scale: 1" = iucr I -I<C . (4 T!'LANKS 9 12 -i/\i-Ifc) r-EXICOTIN6,RIciNUc COMML.4Nfle - "C.ASTOI( A" 'L-ANT' TO RMOV-D. XI TI ¶0 135 PRUNED TO e HViHT AJO &iw, p'lRODLCf-:- KAP1OI. PaRCH, i3.1/ (STRUKS ' 611C.ALlP) XSTiN I&NU COMMUNIS - /9. 'C.AsTOI'- S'AN" PLANTS -lv / ) REMOVP. 11I XISTlN(1 FHOr-NIY, C.ANARJ "CANARY IS LA N 0 PATEE FIA I-Me)" 15' TO MOVD AL-ON W ITH . 7 SLAKS. 0N4TU/1KJ-1E-kk - IC L. la O.T These improvements consist of the work to be done according to these plans and the following specifications and standard drawings: STANDARD SPECIFICATIONS 1. Standard specificatibns for public works construction (19I edition). STANDARD DRAWINGS Regional Standard Drawings, Document No. 769374, filed June 3, 1986. Standard Design Criteria and Standard Drawings, City of Carlsbad (1987) Landscape Manual, City of Carlsbad (November 11, 1990). XISTIN1& ARLH"JDO t7ONA'(- "1At'.JT CAt'i." C1.tAMs TO S MOVD/K1LLD. E)(ISTINJ RICINUS COMMIANIS- IP510.-r 0*61 1. Tree and Shruib locations are approximate. Plant 'c* / material to be removed shall be tagged by the Project "GAsT0r S.AN" PLANTS TO REMOVP. ElSTIN M0P0RUM LTUM- "M'YOPOUM"TI T0J EMOVt7 1.2." I ' 11 610 EXOTIC PLANT REMOVAL PLAN / 2082 U H 2 Biologist. - - - Tree calipers and heights are approximate only. Contractor shalL verify sizes in field. All plant matrial shall be removed including roots, suckers, and vo]lunteers unless otherwise noted. Alternative removal method for palm trees with over four feet of brown trunk height is to cut palm trunk off at ground level, remove suckers, and apply stump removal compound to stump per manufacturer's instruc- tions. Alternative removal method for Arundo donax is to apply the herb-icide "iround-up" by hand-brushing the foliage as per inanufactuirer's recommendations. The killing of plants shall be conducted in accordance with the mitigation program. The Contractor's attention is directed to the possible existence of underground facilities not known or in a location different from that which is shown on the plans or in the special provisions. The Contractor shall take all necessary steps to ascertain the exact locations of all underground facilities prior to doing work and shall protect the utilities or structures shown on these plans or which may be encountered and are not shown on these plans. Before excavating, the contractor shall verify the location of underground utilities by contacting each of the following, utility companies 48 hours in advance: Gas & Electric: S.D.G.& E. --------800-422-4133 Telephone: Pacific Bell ---------800-422-4133 Cable Television: Cable Vision - - - - - - 800-422-4133 Sewer: City of Carlsbad ---------619-438-5604 Water: Costa Real Municipal Water District 619-438-2722 The Contractor shall maintain the service of all existing water and sewer utilities during construction. The Contractor shall be responsible for any damage to existing water and sewer mains during construction and --shall have sufficient pipeline matEria1sandequiprnent on-site to immediately repair any damage to existing mains. The Contractor agrees that he/she shall assume sole and complete responsibility for job site conditions during the course of construction of thus project, including safety of all persons and property; that this requirement shall apply continuousiLy and not be llimited to normal working hours; and that the contractor shall defend, indemnify, and hold the City and the engineer harmless from any and all liability(, real or alleged, in connection with the performance of work on this project, excepting for liability arising from the sole negligence of the City or the engineer. The engineer preparing these plans will not be responsible for, or liable for, unauthorized changes to, or uses of, these plans. All changes to these plans must be in writing and must be approved by the preparer of these plans. The Contractor will be responsible for mitigation and coordination with applicable resource agencies for any disturbance of sensitive resources caused or allowed to occur by the Contractor. P&D Tec;hnologies J 401 West "A" Street, Suite 2500 San Diego, CA 92101 619232'4466 13/27/921 -14- I 1st CITY SiUBMITTAL I hereby declare that I am the licensed designer of work for this project, that I have exercised responsible charge over the design of the project as defined in Section 670:3 of the Business and Professions Code, and that the design is consistent with current standards. I understand that the check of project drawings and specifications by the City of Carlsbad is confined to review only and does not relieve me, as the licensed designer of work, of my responsibilities for project design. These plans have been prepared in substantial conformance with the approved landscape concept plan, water conservation plan, fire protection plan, and all conditions of approval related to landscaping. P&D Technologies 401 West "A" Street, Suite 2500 SanDiego, CA 92101 (619)232-4466 By:! /;~VL41W A" i-4-1 Date:___________ Robert L. Ryan, R.L.A. Expires 10/12/92 //AS BUILT// No. 27 RLA EXP, _ DATE REVIEWED BY' OF CN0 INSPECTOR DATE SHEET CITY OF CARLSBAD SHEETS 1 ENGINEERING DEPARTtMENT 7 REFERENCE DRAWINGS TITLE SHEET/PLANT REMOVAL PLAN FOR: JEFFERSON STREET BIKE PATH LANDSCAPE MITIGATIION PLANS Improvements of Buena Vista Lagoon Visitation Area, Carlsbad Drawing No. 291-3, Project 3304 Irnp)rovernents of Jefferson Street Bike Path, Carlsbad Drawing No., 291-3, Project 3154 APPROVED EXPIRES CITY ENGINEER DATE I DATE INIAL I 1 DATE INIllAL I DATE INI11AL CHKD BY:O.K. I I DWN BY: P.L.R. PROJECT NO. DRAWING NO. ENGINEER OF WO-- REVISION DESCRIPTION OTHER APPROVAL CITY APPROVAL RVVD BY, II 3156 h ..IF4. WI .l.14. I_1 IC.vu PLANT MATERIAL LEGEND PLANTING NOTES Submit photographs of typical tree of each variety and size, to be provided under this contract for approval by the Landscape Architect prior to delivery of trees to the project site. Align double stakes perpendicular to prevailing winds. Contractor shall not disturb any existing plant material unless specifi- cally noted for removal on the Exotic Plant Removal Plan. Contractor shall replace any damaged or destroyed plant material. - - - Approxima Water Lir EXITINJ& TAMARISK TP-S 1V EMOVtJ (THE ('7 TOTAL OTY. WI APPW,(. f if NATIVE. PWSD Ml'( SYMBOL BOTANICAL NAME COMMON NAME SIZE MIN. HT. MIN. SPREAD REMARKS DET. TREES POP FRE Populus fremontii Western Cottonwood 15 gal. 10'-12' 3'-4' Straight trunk, stake, male plants. NL-6 SAL LAS Salix lasiolepis Arroyo Willow 1 gal. 24" 18" Well rooted, multi-trunk. B/L-6 SHRUBS ATR CAN Atriplex canescens Four-wing Saltbush 1 gal. 10" 10" Full & spreading, good color B/L-6 BAC GLU Baccharis glutinosa Mulefat 1 gal. 12" 6" Upright, good color B/L-6 DIS SPl Distichlis spicata Salt Grass Liner 8" 6" Well-rooted divisions C/L-6 ENC CAL Encelia californica Coast Sunflower 1 gal. 8" 8" Full & spreading, good color B/L-6 JUN ACU Juncus acutus var. sphaerocarpus Spiny Rush 1 gal. 12" 6" Well rooted, full clumps B/L-6 SCI AME Scirpus americanus American Bulrush Liner 18" 8" Well rooted divisions CI1-6 TYP LAT Typha latifolia Cattails 1 gal. 18" 10" Well rooted, full clumps C/L-6 GROUNDCOVER HYDROSEED Native Hydroseed Mix No Common Name --- --- Seed See Legend Below NATIVE HYDROSEED MIX SEED LBS./ACRE Artemisia douglasiana ( Douglas Sagewort) 2.0 Artemisia californica ( California Sagebrush) 3.0 Anemopsis californica (Yerba Mansa) 3.0 Baccharis pilularis var. consanguinea ( Chaparral Broom) 1.0 Eschscholzia californica (California Poppy) 5.0 Festuca megalura 'Zorro' ( Fescue) 4.0 Frankenia grandifolia (Alkali Heath) 2.0 Haplopappus venutus (Coastal Goldenbush) 4.0 Heliotropium curvassavicum (Wild Heliotrope) 2.0 Heterotheca grandiflora (Telegraph Weed) 2.0 Lasthenia chrysostoma ( Dwarf Goldfields) 2.0 Lupinus succulentus (Arroyo Lupine) 6.0 Mimulus puniceus ( Red Monkeyflower) 3.0 Plantago insularis No Common Name) 15.0 Total pounds per acre 64.0 lbs. Add to the hydroseed slurry: 2,000 LBS/AC. Cellulose Wood Fiber 160 LBS/AC. Organic Soil Stabilizer 64 LBS/AC. Seedmix Overseed the hydroseed mix with: Eriogonum fasciculatum (California Buckwheat) 10 Ibs./per acre HYDROSEED NOTES 1. No hydroseed mix shall be sprayed within two feet of the lagoon waters edge. No run-off of fertilizer or hydroseed slurry shall be allowed into the lagoon. \ vev~sow ------ Ic_ Ne-N CHT. CHAINlNKF NC-- INE,TALL- TAIL-M-' OF 6.0 PeA. 15TO. j76S. COt1NT TO IST. fNC. F4C. 6HAL-1- S AWAJilZW -To y -i -'t' 0rnc1 IN FIL.t' Po iV -X.AVATWJ MATCHLINESES On HT 20 60 ITJ1f ANLI F1\J Graphic Scale: 1" = 20' i0 RAI \, P&D Technologies 401 West "A" Street, Suite 2500 San Diego, CA 92101 619•2324466 f Y7,REVIEWED OF CA0 "AS BUILT" _______ _________ RLA _______ EXP._________ DATE BYj INSPECTOR DATE 3/27/92 L-- 1stCITYSUBMITTAL SHEET CITY OF CARLSBAD SHEETS 2 I ENGINEERING DEPARTMENT PLANTING PLAN FOR: JEFFERSON STREET BIKE PATH LANDSCAPE MITIGATION PLANS APPROVED PE EXPIRES CITYENGINEERDATE DWN BY: II PROJECT NO. II DRAWING NO. CHKD BY: .yZ RVDBY 3156 DATE INITIAL REVISION DESCRIPTION DATE INITIALDATE INITIAL ENGINEER OF WORK OTHER APPROVAL CITY APPROVAL 74 016 cirr. LINS / / I .7 ' Hi: CHANL-IN}( FF1C - INSTALL PR TA11- t'1-4' FNC SHAL-L ,ALVAN1ZE. MW MATCHLINE SEE SHT. 0 / , a ,. 0 am am an an am am on - ( no MW an MW ma am a __- ,' f 7/ X1SYING CHAI4L-INK FNC TORM A I . LU / j (OL7IAN'1. LOO -t'2L- I / 77 T-r-TOIN-r AIL- \\ NAI L- 4/.oAW.JAft-\\ Cx , flN FAIL-c:;, \ = 9QO/Q COM9AC1 At-I- N02171-IALL Z5kRE- ¶RE.A1.O. A LODGE-POLE RAIL FENCE L-3 NO SCALE 4. - r--- - -- 4>TL. SAL. LAS. 1. ACI. GtLU. '1AL-. 50 FENG. CAL-. 1 GAL 22 SCL AM. L-INRS 40 TY Lt\T 1AL. ..., 4YV7 Approximate / Water Line N XI ,T1N16 NA-1711`V VTArnON N / -1-0 tZMAN •i•' / / j4// iS/ ENVIRONMENTAL IMPACT MITIGATING MEASURES 22 AT!.. CAN. 1 GAL. TUN. AC.LI. 1 CAL. IX. /1 / ASRQ'D NATIVE H'OOSE -7----- Y. // // IC / 7 1 / EI STI TO KE MAIN E1STLN1G E.1ACAL'i'fl[S STUMPS TO MAN (& i:GTAL Ti'.) f~-X16TIN6 L1FTU5 TR PUND 10 ' HI&1T AND cIRDLED TO-OPUCE PCH-(1(o CALIP) ATIY VEO o MAN ' TQ The following wetlands mitigation measures shall be taken in Connection with the construction of this project: Revegetation shall be designed and installed under the supervision of a qualified biologist. Revegetation shall be monitored for five years, beginning with the onset of grading operations. Applicant guarantees 80% vegetative cover. Project evaluation reports shall be made annually by the project biologist then submitted to the Army Corps of Engineers, Department of Fish & Game, and the City of Carlsbad. The revegetation areas will be maintained by the applicant for five years. - Specifically, invasive, non-native plant material, such as Arundo donax (Giant Reed Grass), Cortaderia selloana (Pampas Grass), Nicotiana glauca (Tree Tobacco), Ricinus communis (Castor Bean), Tamarix spp. (Tamarisk), and Eucalyptus spp. (Eucalyptus) will be eradicated. The exotic plants to be removed at the beginning of this project will be identified by a qualified biologist (See Exotic Plant Removal Plan - Sht. 1.) The limits of grading shall be flagged prior to construction. Construction activities shall be monitored by a qualified biologist. During the maintenance period, the applicant will not prune or otherwise manicure native plans material. Signs prohibiting motor vehicles, dogs, and shooting shall be posted by the applicant. The applicant will mark the lagoon area as a sensitive area and a construction-free area. Detailed environmental monitoring is provided within the Jefferson Street Mitigation Program Document. FW P&D Technologies 401 Wlest "A" Street, Suite 2500 - San Diego, CA 92101 619'232•4466 3/27/921 KLP, I 1st CITY SUBMITTAL "AS BUILT" RLA EXP.__________ DATE REVIEWED BY' INSPECTOR DATE I I SHEET CITY OF CARLSBAD II SHEETS 3 ENGINEERING DEPARTMENT I 7 1 PLANTING PLAN FOR: JEFFERSON STREET BIKE PATH LANDSCAPE MITIGATION PLANS .0 60 = 20' APPROVED PE EXPIRES CITY ENGINEER DATE DATE INITIAL DATE INITIAL DATE INIllAL DWNBY: RLtZ PROJECT NO. DRAWING NO. ENGINEER OF WORK REVISION DESCRIPTION OTHER APPROVAL CITY APPROVAL RVVD BY______ 3156 - -,-- I k I 4 fl .1 fi fir. U.... I_i It.. IRRIGATION HEAD LEGEND IRRIGATION NOTES Reference Drawings: Buena Vista Lagoon Area - Irrigation Plans for existing irrigation improvements. Carlsbad Drawing #291-03 and Project 3304. Irrigation mainline is shown diagrammatic. Install in planting areas. Install irrigation heads a minimum of three feet above water level. Contractor shall keep existing irrigation system operational during construction and shall not disrupt the programming sequence of the existing controller. End run of lateral lines shall be 1/2", unless otherwise noted. Remote control valve information shown for reference only on those valves with additional irrigation heads added. Locations of existing irrigation equipment is diagrammatic only and information was gathered from the aforementioned Reference Draw- ings. Contractor shall verify the location of the existing irrigation equipment in the field. Approximate Water Line SYMBOL DESCRIPTION MANUFACTURER/MODEL REMARKS RAD GPM PSI DETAIL F 1/2 1 1/3 1/4 C) SHRUB POP-UP EXISTING VERIFY IN FIELD 6" SHRUB POP-UP TORO 570C-6P WI 15 PC SERIES NOZZLE INSTALL NOZZLE W/ PRESS. COMP. DEV. 15' 1.0 50 G/L-6 " of it of 15' 1.9 50 12" POP-UP STREAM ROTOR HEAD TORO 300 SERIES WI #63 LOW GAL. NOZZLE 30' 3.23 50 HIL-6 IS It of 30' 1.62 50 of if II 30' 0.81 50 to It it 30' 1.21 50 is STREAM ROTOR HEAD ON SHRUB RISER TORO 300 SERIES W/#63 LOW GAL. NOZZLE INSTALL 12" ABOVE FINISH GRADE 30' 1.62 50 lIL-6 30 0.81 50 " IRRIGATION EQUIPMENT LEGEND SYMBOL DESCRIPTION MANUFACTURER/MODEL REMARKS DETAIL HE WATER METER EXISTING SEE IRRIGATION NOTES CC) R/P BACKFLOW DEVICE EXISTING 2" SIZE " BALL VALVE EXISTING " I' BALL VALVE NIBCO#T-113 LINE SIZE D/L-6 REMOTE CONTROL VALVE EXISTING SEE IRRIGATION NOTES REMOTE CONTROL VALVE RAINBIRD EFB-CP SERIES SIZE AS NOTED ON PLANS E/L-6 QUICK COUPLING VALVE EXISTING SEE IRRIGATION NOTES 3/4"QUICK COUPLINGVALVE RAINBIRD 33DLRC W/ KEY WITH LOCKING COVER F/L-6 AUTOMATIC CONTROLLER EXISTING RAINBIRD ISC-6 SEE IRRIGATION NOTES PRESSURE REGULATOR EXISTING CURRENT SETTING APPX. 70 P.S.I. NON-PRESSURIZED LATERAL LINE EXISTING VERIFY IN FIELD NON-PRESSURIZED LATERAL LINE CLASS 200 PVC-3/44 SIZE CLASS 315 PVC — 1/2" SIZE SIZE AS NOTED, INSTALL 12" MIN. DEPTH - MAINLINE EXISTING VERIFY IN FIELD MAINLINE SCH. 40 PVC PIPE SIZE AS NOTED, INSTALL 18" MIN. ____ CONTROL WIRES I LOW VOLTAGE I CONNECT NEW R.C.V. TO EXIST. AUTOMATIC IRRIG. CONTROLLER INDICATES VALVE STATION INDICATES VALVE SIZE INDICATES VALVE GPM .)U2'TIN( IZ'f'. ACKN.ON rvrr XW1INc WA-MK ME-rìR AND ItI(A11ON f 2. P&D Technologies 401 West "A" Street, Suite 2500 San Diego, CA 92101 619'232•4466 NN CHAINL-INK (S CAILOI-A1 ON sHT. ) YJ15T1t'J6i FM EI4 'TO MAIN MAIH 20 40 Graphic Scale: 1" = 20' .flsj 1fl71)nr - ------ ---- -------------- ------ --------- -- ----------- -----------_____ ----. ---- ---------- ---------- I - - -- ---- ---------___ _________ -- ----- -------- __ - ---- - --.-----. -- .1 . I .JI I L. 'JJ n 1 2" DIA. X 8° LONG LODGEPOLE PINE STAKE 2 VINYL TREE TIE - 2 REQUIRED (NAIL TIE TO 3 TREE TRUNK 4 ROOTBALL 5 ROOTBALL BACKFILL 6 PLANT TABLETS 7 2 X ROOTBALL DIAMETER 8 6" WATERING BERM 9 EXISTING GRADE AT SLOPE 10 NEW GRADE AFTER PLANTING 11 SCARIFY SIDES OF PLANT PIT 12 NATIVE SOIL SCARIFY 6"-10" DEPTH 1 - WATER/BOG PLANT SHORELINE PLANTING BACK-FILL (EXISTING SITE SOIL) ROOTBALL UNDISTURBED LAGOON BOTTOM WIDTH OF ROOTBALL DEPTH OF ROOTBALL 4" - 12" WATER DEPTH AVERAGE WATER LEVEL Q (j) I - SHRUB ROOTBALL SET SHRUB ON UNDISTURBED GRADE 6" MINIMUM 2 x ROOTBALL DIAMETER WATERING BASIN. REMOVE AFTER MAINTENANCE PD. PLANT TABLETS (3" BELOW GRADE) SEE SPECIFICATIONS FINISH GRADE AT SLOPE (AS REQUIRED) TOP OF CURB, PLANTER OR PAVING 11 - FINISH GRADE AT EXISTING SLOPE (AS REQUIRED) 12- PLANTING BACKFILL (SET TOP OF ROOTBALL 1" ABOVE ADJACENT GRADE) TREE PLANTING /STAKING DETAIL AQUATIC PLANTING DETAIL SHRUB PLANTING DETAIL NO SCALE NO SCALE NO SCALE 10 11 1 REMOTE CONTROL VALVE 2 FLOW CONTROL 1 BALL VALVE ®—\ 2 PVC SCH. 80 UNION T 11 3 P.V.C. UNION O— 01T 3 FINISH GRADE ITM-1(ra.11 ~_iqll I I I rrmi ff==' i 11 00 11 (~ 5 EPDXY FtLLED CONNECTION II(WI 5 SHORT PVC SCH. 80 4 LATERAL DEPTH (SEE SPECS.) (SEE SPECS.) 6 LATERAL LINE ®r— i ____ .7 3/4" SIZE GRAVEL 2 4 VALVE BOX NIPPLE (TYP.) ______ 6 PVC PRESSURE PIPE SUPPORTS ON COMPACTED SOIL 2 CU. FEET (SEE SPECS.) 3 - 8 BRICK OR CONCRETE 5 \\N 7 PVC SCH 40 FEMALE ADAPTER (TYP.) ____ 8 FLUSH IN LAWN, 2" IN G.C. 9 SCH. 80 RISER (THREADED) 1 CU. FT. (MIN.) PEA GRAVEL SUMP S . r i 10 VALVE BOX (SEE SPECS.) 9 11 2" IN G.C. AREAS 10 COMPACTED SUBGRADE 1" IN LAWN 6 ____J 0 11 BRICK OR CONCRETE 12 MAINLINE DEPTH SUPPORTS ON COMPACTED (SEE SPECS.) III 13 AUTO. CONTROL WIRE 12 l.t ii iI II 1( III1( fllU ( SEE SPECS. SOIL . 14 LINE FITTING 15 14 LUI IU1—iItIUll lilt 15 MAINLINE 1 COMPACT SUBGRADE 2 QUICK COUPLER KEY W/HOSE SWIVEL 3 QUICK COUPLING VALVE (SEE SPECS). 4 FLUSH IN LAWN; 3" IN GROUN000VER 5 6" TO 12" MAX. FROM EDGE OF CURBS, WALKS, ETC. - 6 BRASS ELL 7 12" SQ. X 12" DP. CONC FTG. ON UNDISTURBED GRADE 8 12" LONG RED BRASS NIPPLE 9 SCH 40 FEMALE ADAPTER 10 BRASS COUPLER (FLUSH W/CONC) 11 BRASS NIPPLE 12 18" MIN. TO 24" MAX. ii lti—It( l.IU I t(I I _Jul N, i i 1Iu._t'i11I I!1 (}_J QUICK COUPLER VALVE REMOTE CONTROL VALVE BALL VALVE NO SCALE NO SCALE NO SCALE 1 SIPRAY HEAD IN - POP UP POSITION : 1 - GEAR DRIVEN SHRUB ROTOR 2 POP UP BODY 0 2- 3/4" TBE SCH. 80 PVC NIPPLE 3 LATERAL LINE (LENGTH AS REQUIRED) I - FINISH GRADE 3- FINISH GRADE - - PVC NIPPLE 4 SCHEDULE 80 ___I 4- 3/4" PVC TxT COUPLING 5 PVC TEE OR 10 IilII - iii PVC ELL 2 - POP-UP, GEARED ROTOR ® 6 SCH 80 DOUBLE/TRI ____________ _________ ____ SWING ASSEMBLY 3 - 3/4" STREET ELL S____ - - 5- 3/4" FLEX RISER FIXED IMPROVEMENTS AS REQUIRED) 1 7- PVC, LATERAL LINE (CURBS, WALKS, ETC.) ____ 7 1"', 2" MAX. FROM 4- 3/4" TBE RISER (LENGTH I 6- PVC TEE OR ELL (T.O.E.) 8 SEE LEGEND ____ —4) FOR DEPTH 111 6 6- PVC, LATERAL LINE ____ FIXED IMPROVEMENTS 0 9- 10'MINIMUM FROM 9 12" MIN. SEE SPECS. 5- PVC TOE FITTING ® 8- SEE SPECIFICATIONS 7- 1"-2" MAXIMUM FROM I FIXED IMPROVEMENTS 10- #4 RE-BAR 8- SEE SPECIFICATIONS lIlItI (CURBS, WALKS, ETC.) ____________________________ 11- GALV. STEEL CLAMPS T'\n (OPEREAD) I "AS BUILT" STREAM ROTOR HEAD ON SHRUB RISER NO SCALE G L-6 POP—UP STREAM ROTOR HEAD SHRUB POP-UP HEAD NO SCALE NO SCALE P&D Technologies 401 West "A" Street, Suite 2500 San Diego, CA 92101 619"232"4466 iN 10719flCi GER REPROGRAPHICS 05 SPECIAL PROVISIONS SPECIAL PROVISIONS PART 2- CONSTRUCTION MATERIALS PART 3 - CONSTRUCTION METHODS PART 2 SHALL CONFORM TO PART 2 OF THE STANDARD SPECIFICATIONS FOR PART 3 SHALL CONFORM TO PART 3 OF THE STANDARD SPECIFICATIONS FOR 308-5 IRRIGATION SYSTEM INSTALLATION PUBLIC WORKS CONSTRUCTION 1991 EDITION EXCEPT FOR THE FOLLOWING PUBLIC WORKS CONSTRUCTION 1991 EDITION EXCEPT FOR THE FOLLOWING CHANGES AND/OR ADDITIONS: CHANGES AND/OR ADDITIONS: 308-5.3 INSTALLATION OF VALVES, VALVE BOXES, AND SPECIAL EQUIPMENT SECTION 212 LANDSCAPE AND IRRIGATION MATERIALS SECTION 308 LANDSCAPE AND IRRIGATION INSTALLATION DELETE third and fourth paragraphs. Add: Ball valves and quick coupler valves shall be installed below ground in plastic valve boxes as shown on the drawings. 212-1 LANDSCAPE MATERIALS 308-1 GENERAL - - 212-1.2 SOIL FERTILIZING AND CONDITIONING MATERIALS ADD: 308-1.1 SUBMITTALS. 308-5.5 AUTOMATIC CONTROL SYSTEM INSTALLATION 212-1.2.3 COMMERCIAL FERTILIZER 308-1.1.1 LANDSCAPING SUBMITTALS CHANGE:: Third Paragraph - When the valve is to be housed in a concrete box - To: When - - the valve is to be housed in a plastic box. ADD: - Upon being awarded the project, Contractor shall submit a list of soil amendments, fertilizers, plant materials, with quantities of each within 15 days from award of contract. 308-6 MAINTENANCE AND PLANT ESTABLISHMENT Gypsum shall b a commercially processed and packaged gypsum (CaSo2H20) with - minimum 80% grade containing 14% combined sulfur. 308-1.1.2 IRRIGATION SUBMITTALS CHANGE: The plant establishment period shall be for a period of 30 calendar days - To: The . plant establishment period shall be for a period of 90 calendar days. Apply post-plant fertilizer Post-plant Fertilizer (commercial) shall be a combination of natural organic and Submit a list of all irrigation equipment to be used, manufacturer's brochures, maintenance - at a rate of 20 lbs. per 1,000 sq. ft. 45 days after planting. (This application rate is for bidding inorganic granular fertilizers, free-flowing, suitable for application with approved manuals, guarantees and operating instructions. purposes only; final fertilizer application amounts shall be approved by the project landscape equipment, and shall contain the following minimum available percentages by architect and project biologist.) weight with the following minimum available percentages by weight: 308-2 EARTHWORK AND TOPSOIL PLACEMENT Nitrogen 14% mm. 308-2.3 Topsoil Preparation and Conditioning - Phosphoric Acid 7.01% mm. Potash 3.01% mm. 308-2.3.1 DELETE 1st paragraph ADD: Topsoil shall be existing on-site top soil. C. Planting Tablets shall be commercial grade, tightly compressed tablets with the 308-2.3.2 ADD: following available percentages by weight: a. The following soil amendments and fertilizers shall be evenly spread on topsoil after Nitrogen 20% topsoil is scarified. Phosphoric Acid 70% - Potash 5 51, Quantit'per 1.000 sq. ft. Gypsum 200 lbs. - 212-1.2.4 ORGANIC SOIL AMENDMENT NAIAD 1 oz. - - DELETE in entirety and ADD: - - - Type 1 organic soil amendment shall be a special blend of organic fractions to supply several degrees of breakdown rate which lasts up to 10 years in the soil, a portion of inorganic amendment that resists further breakdown, pH of 5.5 to 6.5, salinity of 3.0, organic matter (dry weight basis) more than 90%, non-ionic wetting agent and total nitrogen content of 0.5%. (Loamex, Wil-Gro-Life, Forest Humus or approved equal). 308-2.4 FINISH GRADINGS ADD: Deep Water Leaching: 212-1.2.6 SOIL WETTING AGENT Wetting agent shall be liquid product. (NAIAD or approved equal) 212.1.5.3 TREE STAKES Delete 1st paragraph ADD: Tree stakes and ties shall be type as shown on the drawings. 212-2 IRRIGATION SYSTEM MATERIALS 212-2.1 PIPE AND FITTINGS DELETE 212-2.1.3 Second Paragraph ADD: Class 200 pipe (3/4" size and larger) and C1.315 (1/2" pipe) shall be used for installation on the discharge side of the control valves. Schedule 40 pipe shall be used for continuously pressurized pipe on the supply side of control valves. 212-2.2 VALVE AND VALVE BOXES; ADD: 212-2.2.2 Gate and Ball valves shall be type as specified on drawings. 212-2.2.7 DELETE entire paragraph ADD: Valve boxes and covers shall be 91/-," x 16" x 111" plastic meter boxes for remote control valves and 8" diam. round plastic boxes for ball valves. 212-2.4 SPRINKLER EQUIPMENT DELETE entire paragraph and ADD: Sprinkler heads shall be as required on the drawings or approved equal. ADD: 212-4 EXTRA EQUIPMENT Contractor shall supply two (2) control valve k:eys and two (2) wrenches for removing each type of sprinkler head. After complete installation and testing of the Irrigation system, all areas shall be deep water leached and compacted and settled by continuous application of irrigation water until the soil has received a minimum of six inches of water. After leaching operation, three soil samples sh411 be taken by Contractor and Landscape Architect and given to Landscape Architect for testing. Soil test shall meet the following requirements: EC - Maximuim 4.0 x 10.3 pHe - Maximuim 7.5 - C. Re-applicatiom of soil amendment and leaching operation shall be repeated by Contractor if tests show a negative result. Expense of test, re-application of a soil amendment and leaching operation shall be borne by Contractor. 308-4.5 TREE AND SHRUB PLANTING DELETE: Fourth paragraph and ADD: - Planting Backfill shall consist of the following: Organic Soil 25% Existing site soil 75% Gypsum 20 lbs. per cu. yd. Naiad 1 oz. per Cu. yd. PLANTING TABLETS - Planting Tablets shall be placed in each tree and shrub planting hole at the following rates: 1-21 gram tablet per 1 gal. container 2-21 gram tablets per 5 gal. container 4-21 gram tablets per 15 gal. container 308-4.6 PLANT STAKING AND GUYING 308-4.6.1 Method A Tree Staking - DELETE entire section. 308-4.6.2 Method B Tree Staking - DELETE 1st sentence only. ADD: The tree shall be staked with two - 2" diam. lodgepole pine stakes driven 24" into the ground. V P&D Technologies o. 401 West "A" Street, Suite 2500 - San Diego, CA 92101 6192324466 V ç Os OF RLA AS BUILT _______ EXP. DATE REVIEWED BY: INSPECTOR DATE 3/27/92 1st CITY SUBMITTAL CITY OF CARLSBAD SHEETS 7 ENGINEERING DEPARTMENT - SPECIFICATIONS FOR: JEFFERSON STREET BIKE PATH LANDSCAPE MITIGATION PLANS APPROVED CITY ENGINEER RCE EXP. DATE 1 I BY: PROJECT NO.iAL CHKD BY: - R BY: [ 3156 DRANG NO. DATE INITIAL RESION DESCRIPON DATE INITIAL DATE INITIAL ENGI R 'NEER or wox om APPROVAL a APPROVAL rIGER REPROGRAPHICS . - V • J.N. 1U(12.00 JEFFERSON STREET BICYCLE PATH MITIGATION MONITORING AND REPORTING PROGRAM ; Prepared for: CITY OF CARLSBAD Engineering Department 2075 Las Palmas Drive Carlsbad, California 92009 Contact: Al Virgilio (619) 438-1161 Prepared by: P&D TECHNOLOGIES 401 West "A" Street, Suite 2500 San Diego, California 92101 Contact: Elyssa Robertson (619) 232-4466 March 1992 TABLE OF CONTENTS Section Page I INTRODUCTION ...........................................I-i II AFFECTED ENVIRONMENT .............................n-i A. Existing Condition ........................................11-2 Vegetation ..................... ..................... 11-2 Wildlife ...........................................11-10 Soils ............................................11-10 Hydrology .........................................Il-il B. Potential Project Impacts ..................................11-12 III RECOMMENDED MITIGATION MEASURES .............ill-i A. Construction Monitoring ................................... 111-1 1. Procedural Guidelines ..................................111-1 B. Exotic Tree Removal .....................................111-4 C. Revegetation and Monitoring .................................111-5 Site Preparation .....................................111-5 Planting Design .....................................111-6 Plant Sources ................... .................... 111-6 Installation .........................................111-8 Irrigation ............................................111-8 Erosion Control .....................................111-9 Maintenance and Monitoring ............................111-9 Maintenance ....................................111-9 Monitoring .......................................111-10 Monitoring Schedule ............................... 111-11 D. Protection of the Lagoon ..................................111-12 IV REFERENCES ...........................................TV-i APPENDICES ................................................ Monitoring Schedule Biological Technical Report for the Jefferson Street Roadway Widening Project LIST OF FIGURES Figure Number Page 1 Regional Map ................................I-i 2 Vicinity Map (USGS 7.5 min topo map) ..............1-2 3-8 Wetland Delineation Maps (with Biological Resources Map) ...........................11-3 -H-8 9 Project Communication Process ..................111-2 10-16 Landscape Plan Maps .................Map Pockets 1-7 17 Urban Pollutant Gravel Filter ....................111-13 LIST OF TABLES Table Number Page 1 Native Hydroseed Mix ........................111-7 I 1•• I I. 'I. :1 The proposed Jefferson Street Bicycle Path project is located predominantly along the northern side of the existing Jefferson Street Jefferson Street currently exists as a two lane road immediately south of Buena Vista Lagoon The project boundanes are from Marron Road to the east and Interstate 5 to the west (figures 1 and 2). The proposed projectconsits.of the widening of existing Jefferson Str&t from ManonRpd to 1-5 to accommodate two eight foot bike paths to be located along the north side oLJefferson Street The majority th of the widening would be conducted on the north side of the street with some widening on e south side near the intersection of Jefferson Street nd Marron Road In addition to the actual paved areas of expansion, grading impacts will extend out from the pavement. The roadway has been designed to drain from the road into .the lagoon,; Thes areas of potential impact, as shown on the attached plans, were analyzed for this report and are referred to. as the impact zone. The following report details the existing conditions along Jefferson Street, as well as the proposed mitigation plan for this project The mitigation plan describes recommended measures to mitigate for potential impacts to riparian habitats associated with grading for Jefferson Street which would result in encroachment of fill material into Buena Vista lagoon..This mitigation plan also outlines mitigation measures to compensate for potential indirect impacts to the lagoon,;, itself. I The purpose of this mitigation plan is to ensure that potential impacts to natural resources I resulting from implementation of the proposed project are sufficiently mitigated and that native vegetation is created to buffer and enhance natural open space areas along the bike path and I lagoon shoreline This plan is designed to be utilized by the City of Carlsbad Planning and Engineering staff, construction foreman, landscape contractor and monitoring biologist I This mitigation plan is intended to address only, those potential impacts associated with the widening of Jefferson Street for the bicycle path project The mitigation plan would be I applicable only insofar as revisions to the proposed project remain in substantial conformance with the project, as proposed Temecula Orange,County . . . Riverside County . fleO MI. . Falibrook .. Camp .. . Penplelon Ow.ill L.a*. . . Project Site . a .. . . . . . Valley Center 0 .. Vista Oceanstde San Lake W I old a.nna e.a lagoon . . Marcos . . . . L0000n . . Escondido , Carlsbad a.liqfroa Lagoon 61. San DeguIO Lake MoOns .. . Encinitas aose,vo, . . LaSO Ramona Ramona Rancho - Bernado - RanchO . Santa Fe l.O5 CyCnrOO S.nD.yo.Ia . . . . . t San icente Del Mir o a P, Lagoon PoWay ir Rvo E$ Caarsn M a Mesa r— Santee 47 n63 • -I52. , ... . . . La Jolla Alpine 15 LO.l.nO R El Cajon Mission Bay .. . . . . La Mesa San Diego ' Lemo . - Cr ye &a4 .~wona fi-. Nat - n City . Coronado a : ur far Lolei Chula Vista ° Imperial Beach T,i.n. (.5.,.,,5 Otay Mesa - - -', Mexico Tiju8na5 '\ - .. . U . - .,. - • . - . . --'. 1 No Scale , .. / J ETER MA IHILLV ç tT \ ) \\ F MEORI # , \ em~p A\ \Lincolri 9, Muil sch El CanW6 Country Clip~, X - Sewage / Shopping ON j All T 11tj T 12 A oiL\AVE / \ I NOW ES tr: \ L__E •. .. S - .• I L /69 . Ln . 'S5_S. •\ fl LASUNA Ke 'N Hig hh Sch St pkch,~ AZ S \ ,1eferson SCph. ' fflL I Scale: V = 2000' Figure 2 Source: Source San Luis Rey 7.5 Minute Quadrangle Vicinity Map- I " :, Section II AFFECTED ENVIRONMENT :1 The Jefferson Street Bicycle Path project consists of a street widening to accommodate two 8- foot bike paths The widening of Jefferson Street will require the placement of fill adjacent to Jefferson Street encroaching into Buena Vista Lagoon along the lagoon's southern margin, west of 1-5 A maximum of 0 1 acre of direct wetland impact would occur. While implementation of the project would affect sensitive biological resources, the revegetation plan included herein, is intended to provide compensation to sensitive resources for both direct and indirect potential impacts, as identified below. A biological technical report has been prepared to address potential impacts associated with the widening-.9f Jefferson Street to. accommodate the proposed bike paths. The purpose, of that biological- survey .was to determine the nature and extent of the sites' sensitive biological 'resources: Sensitive hiologica.lresources are defiuied here as habitats, and plant or animal species that are listed by the Califoriiia Department of Fish and Game (CDFG) or the U.S. Fish and Wildlife Service (USFWS) or are considered depleted or declining locally. The area-.of potential impact or impact zone was surveyed on-February 18,1991, by.P&D' botanist Elyssa Robertson and wildlife biologists Ray Vizgirdas and Doug Wilhck Pre't'ious to the biologist's survey, the limits of potential direct impact along the roadway's northern side were staked by *.a survey crew. The impact zone was based on "a 1 inch .= 20 feet scà.l site plan provided by the City of Carlsbad Vegetation was mapped on these base maps which were included in the biological technical report. A wetlands analysis was conducted and a boundary determination was made based primarily on hydrophytic vegetation dominance and site hydrology. Dominant vegetative, components were noted along the entire length of roadway within the impact, zOne. These-'areas were plotted by segment, as designated by survey markers. Two soil samples were. taken along the proposed route within the impact zone; one within the disturbed wetland habitat and one within the undisturbed wetland habitat. A preliminary, soils analysis was conducted.aspart of this' study due to the artificial nature of the fill material used to create the existing Jefferson • Street road'ay. Soil samples were taken primarily to locate the depth of saturated spil. Page 11-1 A EXISTING CONDITION I VEGETATION 1 Habitats along the proposed impact zone of Jefferson Street, from 1-5 to Marron Road consist of three types disturbed, disturbed wetland and wetland habitats (Figures 3-8) Disturbed I habitats are defined as areas that are either barren or support non-native weedy or ornamental species On this project, disturbed areas within the impact zone include a small dirt path for I. pedestrians, barren :areas, eucalyptus trees (Eucalyptus sp.), and slopes dominated by ice plant' (Carpobrotus sp.). These areas appear to be continually disturbed through human activities and I were originally formed through construction of Jefferson Street The existing Jefferson Street appears td have been constructed on artificial fill:near the east en&(Marron Road) and on a I hillside cut on the west end near 1-5 It is unknown if wetland conditions existed beneath the roadway at the time of initial construction at the east end of Jefferson Street. The area has been : disturbed long enough however, that regeneration' of wetlandhabitat is unlikely. For the purposes of this -report, areas not supporting native plants are considered disturbed. Under federal regulations, wetlands ar' defined as areas that are inundated or saturated by surface or ground waters' at a frequency and duration sufficient to support, and that under normal ircurnsances do support, a prevalence of vetation' typically ad'apted for life in -sathrated soil conditions. Three factors are considered in the designation of 'wetlands: the' presence of I hydrophytic vegetation, hydnc soils and wetland hydrology. A minimum of one positive wetland indicator from ,each category must be found for the U.S. Army Corps of Engineers (ACOE) to I determine an area to be wetland (ACOE, 1986) Areas indicated as wetlands by all three factors during the rainy season may lack the indicators of hydrology and or vegetation during the dry I season, or the vegetation may have been altered or removed through human disturbance Such areas may still be regarded as wetlands by resource -agencies For this project site these areas are I considered disturbed wetlands Disturbed wetlands are defined by the USFWS in the 'Unified Federal 'Method of Wetland Delineation' as: ' I El I Page 11-2 / 241z2 . Ty IUD = TT .1 I 1 I LEGEND Limits of Impact Disturbed Wetland Disturbed Habitat o 20 40 Source: Keitner & Associates, Inc. Figure 3 Wetland Delineation of Jefferson Street Widening '4 lv -- LO, - CII?: \- 7 L\ \ - \ C'.-- 70 CW.191AI ,9A/QV q.o'.J'7v ( rf4V, (TYPICAL) 7vc F-f 0611MCArOR IN 'Do' /NP6evA ..s (T$) I' 61, CP) - - C .'- ''k' G"kWP6 WI/fTC PC' crR44'f, F/-33 rRQA/5/r/OA/ PROPO.j&O QPT T I i /NfD 1X'37• i9.C. NE.A"92 x'r p,. q C .,,pO'J RAID poR77oA/a N - EzT P9a Feavr oP A1EAf8&1. tWiTR(iC8/K6 7? PRai9OC ,.sfrieorM vjnôi.j DRQ,'A/- ,57ORM L. Lu ç -- p CO&C or CO3rRCT P C.i5e5M67-2) ..... .... - .- .. - LEGEND Limits of Impact EM Disturbed Wetland Disturbed Habitati. o 20 40 GO — Source: Keliner & Associates. Inc. riguw VVetland Delineation of Jefferson Street Widening 10 Jjfk .- e.eae 70 £9/AI 9A'-9 V 'IF .~n LEGEND I Limits of Impact Disturbed Wetland F-1- Disturbed Habitat 0 10 40 c.o I Source: Keitner & Associates In- g Finure 5 Wetland Delineation of Jefferson Street Widening - TYCF' pWW(ATO'4 yp.,- €ca 7V DRR/N ,q.J,çy / RO.QD.6h9Y(/%tY/'V) pA/AIT / (TYPICAL) I 5IPE) \ —SUM sum \" - — — — — — — — — — - — ctf 20 ¼ 43253O0 R.50 242 _-;-bQc— 4. N. • - . °. C44 rlr4Ag Oc( - _'o$ LT 1 ' CoA/.5CCP °&€ rYAIC,91-Cr,c, ----------. -s*'er IL. LEGEND Limits of Impact Disturbed Wetland LII Disturbed Habitat o 20 40 GO —J Source: Keltner & Associates. Inc. OD 1-igure t Wetland Delineation of Jefferson Street Widening 1 I I I 'I I I I I I I I I I I I I I c I:c \ \\ \LX; fLECrO T0 VYKA P¼ 1yP( _- \\ 416W 9/ NY M r4 lu AP Ir MAO ZN oA PO 1/8 ,4 If . RSOA1 ___ c . - .tA: w . PRO FL-6 60 LEGEND Limits of Impact Wetland Disturbed Habitat 00 40 (o —j ource: Keitner & Associates, Inc. t-igure i Wetland Delineation of Jefferson Street Widening r - ypC- F1 OEL,EATOR \ (€I0O (AITRVA £ 'rve - - - - —CMOVE CX157 PA/MTED CY15r 4.C. "l • -- .-- - A 0-33 73-5 TO 5H66 r TT IzS 131 LEGEND Disturbed Habitat 0 40 (#0 Sotirc KeItnr & Assnites .tne- Wetland Delineation of Jefferson Street Widening / "Disturbed areas include situations where field indicators of one or more of the three wetland identification criteria are obliterated or not present due torecent change" Q "wetlands that, under natural conditions are simply difficult to identify, such as wetlands dominated by upland species, wetlands lacking field indicators: for, one or more of the technical criteria for wetland's, and, wetlands occurring on difficult to identify hydric.Sdi1s"',:, The 'disturbed. wetland 'ithin the impact zone,: okJefferson Street does not have 'the indictors of hydnc soils or hydrology. It is, however, domiiated by (greater. than 5011o). facultative wetland plant species, arrow weed CPluchea sericea) Facultative wetland plants are defined as plants which usually occur in wetlands (estimated probability 67% to 99%), but are occasionally found iii' non-'etlands (U'SFWS 1988). The understory, of these areas are either b'aré' ground or a weed.y, assemblage' of ice-plant and other non-native 'species. Wetlandwithin'the study area'were areas whichex.hibited.'amarsh growth, contained sandy'soils and soil moisture was within two inches of the surface Plants dominated within this area included cattails, Cfypha latifdlia), American bulrush (Scirpus americanus)'änd spiny rush (juncus acutus var. sphaerocarpus). Sandy soils, though: nota true anaerobic soil, is listed on the USDA list of 1ydric soils (USDA 1985). In addition, 'ter taking two soil samples within this area, soil moisture was noted within two inches of the soil surface To meet the hydrology, criteria, soil moisture must be within six inches from 1 the surface (Wetland Training Institute 1.989). Sensitive Habitats and Plants , Sensitive habitats are those which are considered rare within the region, are listed :by the California Natural Diversity Data Base, or. support sensitive plants or animals. The only sensitive habitat onsite is the. wetland habitat along certain' portions;.of the proposed 'bike path. Wetlands are subject to the Clean Water Act 'permit provisions regulating their filling and may -' be subject to the Rivers and.'Harbors Act, as well. These are enforced by the .ACOE and the U.S. Environmental Protection Agency, with technical input from the U.S. Fish and Wildlife Service. "I . ' Wetland, habitat is naturally limited and remaining acreages are, important island habitats for migrant birds. Many bird species are restricted to wetland habitat and are dependent on it for, breeding. Overall, wildlife diversity is normally higher in wetland areas than in surrounding Page 11-9 habitats Approximately 0 09 acres of disturbed wetland habitat and approximately 0.,012 acres of wetland habitat exists in the study area. High interest plants include those listed by the U S Fish and Wildlife Service (USFWS, 1985), California Department of Fish and Game (CDFG, 1985) and the California Native Plant Society (Smith and Berg, 1988) The CNPS listing is sanctioned by the California Dejartment of Fish and Game and essentially serves as its list of "c'añdidate" species for threatened arid endangered status. Table .1 ofAppendix B (biological resources technical report)" lists the sensitive plant species known from. the area, but not observed. One sensitive plant species was noted onsite: spiny rush is listed by the CNPS, as a plant at hrmted distribution (List 4) This plant occurs in the marsh habitat of the wetland Approximately five individuals would be directly impacted by the proposed project. WILDLIFE Wildlife species detected during the survey are listed in Attachment B of the biological resources technical report None of the animal species observed or detected within the project area is listed as ii I or threatened by the U.S. Fish ail Wildlife Service '(USFWS) or ,the California' Department of Fish 'and Game (CDFG). . Sensitive, wildlife species' likely": to occur in th. vicinity are summarized below in Table 2 of Appendix B, thebiological resoirces technical report. SOILS ' According to maps prepared for the Soil Conservation Service (1973)', soils indicated for the project area are identified as "Terrace Escarpments". This soil type belongs 'to hydrologic group D and represents 'soils with highest runoff potential. These soils are composed prirnaiily'of clays that have a very slow infiltration rate, a high shrink-swell potential, 'a high permanent water.table, .and are shallow over nearly impervious material. Terrace Escarpment soils are highly erodible,, have severe limitations' for use, and' if used, require protective and'corrective measures to be taken before and during their use. Page 11-10 ,3; ,•, , ' '" '' :1 The results of preliminary soils analyses conducted., for the revegetation area indicate thai soils in this area were slightly alkaline (7.1-7.7 pH) and high in nitrates and soluble salts (electrical I conductivity was measured at 20±) Phosphorous and potassium levels were in the low to normal range, while trace elements measured slightly low. I The soil report suggests that a soils textural test be conducted to determine more accurately the I percentages of silt, sand, and clay present in the soil, as well as the exact soil type,This test, it was indicated, would reveal additional information about soil compaction and water 1 permeability, and what amendments, watering, and fertihzation may be most appropriate. I It was also recommended that 150:200 pounds of gypsum (soil amendments per, 1,000 square foot: area be used in an attempt to neutralize the high salt content of the soil However, this blanket I approach to soil augmentation should be avoided until further tests are conducted, including toxicological and hydrologic test, to ascertain the pofential short andlong-term éffectsofgypsum application to the lake's water quality and wildlife. i .• HYDROLOGY ,. The proposed project site is located within the Carlsbad Hydrograhic Unit and portions of the I • projetmay lie within the 00-year flood plan. Howevet,, a detailed hydrologic study was not conducted for this project, as it was not within the scope of the report Drainage in the vicinity of the project, in general, moves ma westerly direction and collects in the lagoon; The lagoon has been closed to the ocean since the late 1960s The source of water in the lagoon is a I combination of natural runoff from surrounding urban development and stream flow from Buena Vista Creek. • •••.•'• ..• ..•'•i•• •• ,• •:•••••• ,"•'••••,• •••• • • • : B POTENTIAL PROJECT IMPACTS The impact analysis was based on habitat within the impact zone and indirect impacts associated with drainage into the lagoon Acreage analysis, was not conducted for areas outside the impact zone The proposed project would directly impact 09 acres of disturbed wetland habitat and 01 acres of wetland habitat for a total impact of 0.1. acres Impacts to wetland habitat, though not large, are considered significant by the USFWS and CDFG Impacts associated with the loss of spiny rush are not considered significant, at this time, 1ue to this plant's low sensitivity status and the abundance of this species within the protected lagoon habitat The remaining area within the impact zone, as shown an the attached plans, is considered disturbed habitat. impacts tdthis arqa is not cOnsidered significant. Potential indirect impacts to the habitat, and wildlife of the lagoon associated with the road widening are expected to occur. Potential indirect impacts which may occur include (1) increased erosion due to additional surface water runoff, (2) increased pollutant discharge of petroleum based products from the roadway into the lagoon due to runoff, including oil, grease and/or gasoline and, (3) increased human encroachment into the area due to use of the area by pedestrians and recreational users These impacts are considered potentially significant based on the: amount of increase for each. 0 The impacts identified, above, would be reduced to a level less. than significañt through implementation of the mitigation measures -provided in the Biological Technical Report and as described in Section III of the mitigation plan. Section III RECOMMENDED MITIGATION MEASURES A CONSTRUCTION MONITORING An important aspect of the total mitigation program is the construction monitoring phase of the project This is essential to the project to ensure that the revegetation is installed per the approved plans and specifications, and to ensure that additional impacts beyond those identified for this project, do not occur The monitoring biologist will be onsite throughout the initial construction project, including staking and grading, to ensure potential direct and indirect impacts to sensitive plant and wildlife species are avoided The construction monitoring phase includes pre-construction meetings, landscape plan review, site inspections during staking and grading activities, as well as weekly site visits to obsene implementation of-the site's revegetation plans. PROCEDURAL PROGRAM GUIDELINES Prior to initiation of any construction activities, meetings shall take place between all parties involved, to discuss and outline the monitoring program and to establish the responsibility and authority of the participants Those included at these meetings should include City staff, the project biologist and monitoring biologist, a CDFG representative, the construction supervisor and grading foreman, the landscape architect, and the landscape installation contractor. The purpose of these meetings will be to provide communication between the involved parties, establish an .:effective reporting system prior to any monitpring effort, and to ensure that all arties have a clear understanding of-their responsibilities, and what the established chain of commuhication will be for this project. Discussions at these meetings should focus on understandifig the purpose and function.Of flagging and staking of the daylight line and the limits of grading, the identification of sensitive resources, areas of the site to remain undisturbed and those to be affected, the areas to be revegetated, and the establishment of a communication hierarchy (Figure 9) All project participants will have a clear understanding of the importance of the adjacent lagoon habitat to state and federal agencies. Page III-1 The monitoring biologist will communicate directly with the City's engineering staff (project engineer and site construction supervisor) Copies of correspondence between alLparties, as identified above, shall be sent to the project manager at the City's Municipal Project's Division It will be the responsibility of the project engineer to ensure that issues raised during the construction process by the biologists landscape contractor, landscape architect, construction supervisor and/or grading contractor are addressed in a timely and appropriate manner. Unresolved issues will be addressed by the City's Engineering Department. The limits of impact (daylight line, not right-of-way) will be clearly staked and flagged by a survey crew in coordination with the project and monitoring biologists immediately prior to commencement of grading and clearing activities The construction foreman will be informed' by the biologists of the sensitivity of the adjacent lagoon habitat and that any impacts to areas outside the impact., zone will 'be prohibited. The project ãnd/ormonitoring biologist shall have the authority to halt or otherwise delay the Site's activities for not more than 24 hours, if additiohaL impacts to sensitive resources occur during the construction process The purpose of this measure is to provide the City with sufficient onsite supervision to ensure additional impacts do not occur and provide adequate time to notify appropriate City, staff of potential additional 'impacts If impacts occur inadvertently, remedial mitigation and notification of CDFG, California Coastal Commission and ACOE will be required. Any additional mitigation measures will be determined and agreed upon in advance of a resumption of construction aOtivities. The monitoring biologist will conduct onsite construction monitoring activities twice-weekly during initial grading and weekly thereafter to ensure construction activities do not affect biological resources 'outside the project's specified limits. , Monitoring will be performed 'by biologist qualified in assessing proper revegetation implementation and identification of offsite impacts, should they occur. Information from these, as well as other site visits, will be incorporated into interim reports prepared for the City 'of -Carlsbad and the permitting agencies on a monthly basis. : I Page 111-3 B. EXOFIC TREE REMOVAL •. . the existing habit A number of exotic plant species situated within at talong the south side of the lagoon have been targeted for removal, as part of this mitigation plan Exotic plant species offer little in the way of "appropnate" or useful habitat for wildlife using the lagoon and its many environs The removal of these species will allow native, wetland-associated vegetation to develop which will enhance existing habitat, in this area.. '• . S Those species identified for removal or to be cut down are listed on e the landscape plans providd with this mitigation plan document These species include castor bean, myoporum trees giant reed, and date palm trees.The location and number of each of these species is provided in the landscape plans (Map Pocket No 1) Exotic plant removal will be performed in accordance with the directions specified in the enclosed landscape plans and as provided below All exotic plants to be removed or cut :down will be flaggedby. the project biologist The, preferred method of removal or cutting down of exotic plants is by hand. Plant material to. be removed includes roots,, suckers, sthmps; and volunteers uñless:otherwise noted on the landscape plan or as directed .bythe landscape contractor or project biologist. .. Hand removal: shall include the use of small han'd..tools (txe,'poIaski, chain saw, etc.,). Larger pieces of plant material, such as stumps, shall be removed using chains attached to-vehicles located outside, the lagoon and within the impact zone. The elimination of exotic plants will, be conducted under the supervision of the landscape architect and monitoring biologist. The eliminaiion .of giant reed species may 'include hand application .,of hebicides; no. .spraying.wil be permitted and the application of the herbiôide will be.monitored by the landscape contractor and monitoring biologist. Page 111-4 II I All material will be removed from the lagoon and disposed in an appropriate wlandfill or - turned into It mulch to be used elsewhere (ndthear the lagoon or other riparin' resources). 1 C. REVEGETATION AND MONITORING The purpose of this revegetation plan is to ensure that potential impacts to wetland resources I resulting from project implementation are sufficiently mitigated to reduce such impacts to a level less than significant. Approximately 0 3 acres of npanan habitat would be restored under this I revegetation plan for impacts to 0.1 acres of disturbed wetland and wetland habitat It is the intent of this revegetation plan to replace the existing habitat type with in-kind habiat An area I of the lagoon adjacent to the existing parking lot has been identified as suitable for the revegetation effort (Map Pocket Nos. 1-7). Revegetition of thjs area 'ill enhance and recreate riparian habitat That cannot occur there naturally due to ongoing pedestrian traffic. SITE PREPARATION Onsite soils will be scarified or roughed-up in areas to behydroseëded. Soil amendments may I be added to specific soil material used within the revegetation area where restoration and recreation is to occur. Soil amendments, as specified by the landscape architect and the project I biologist shall include only those recognized as appropriate for use in development 'of npanan habitats. It is expected that wetland condition s(hydricsoil development), as needed for riparian habitat creation, will develop naturally over time due to the site's existing hydrologic character, thereby not requiring long-term irrigation or fertilization. The soils analysis for the project showed a significant presence of nitrogen and pIosphorous. I Therefore, only minimuni fertilization may be required. Generally, it is suggested that broadcast fertilization with nitrogen or phosphorous-basedcornmerciál fertilizers be avoided because such practices-favor.-weedy, exotic species development over natives in Southern California However, the landscape plan suggests the use of fertilizer tablets placed below the soil surface within the roothall of each container specimen. It is anticipated that this fertilizer will be depleted within ninety days and further fertilization will not be required. A broadcast fertilizer for the hydroseed shall not be used I Page 111-5 i S S PLANTING DESIGN The planting design specifies the steps required for the restoration of existing disturbed and undisturbed wetland habitat adjacent to the lagoon The ultimate goal of the mitigation program is to restore, as well as recreate, riparian habitat along Jefferson Street through simulation of the physical structure, species composition, and the ecological function of the existing undisturbed habitat Selection of plant species was determined largely by existing species composition adjacent to the lagoon and commercial availability. The mitigation area will consist of three zones of vegetation, each with species selected in accordance with the physical characteristics of the site facultative wetland (marsh), facultative (riparian, scrub), and upland species (in order of hydrological requirements). PLANT SOURCES Lead Time It typically takes approximately six month to one year from 'the date of plant, material cóllectiôn to produce one-gallon container stock, provided collections are made at the appropnate time of year. However, some needed plant matenals may already be available at native plant nurseries. Use of these nurseries and their existing plant stocks will avoid the need for "contract growing" from seed and cuttings taken from the project site If seeds are to be collected from onsite, they should be taken the gear' previous to implementation of the hydroseediñg effort. It should be noted that the. preferred method of revegetation is to use seed or cuttings:from existing native plants onsite to maintain genotypic characteristics and potential adaptive gene variations,' where feasible. The use of non-indigenous,' native. plant materials in .revëgetation programs can result in problems which include failure to survive or establish, displacement of indigenous species, hybridization with indigenous species, introduction of inappropriate taxa, and the unintentional introduction of other organisms, including pathogens and pests (Recon 1991) As a result, plant materials' to be 'used in any revegetation plan should be derived from materials: local to the mitigation site, whenever feasible Whenever indigenous plant materials are not readily available commercially, advanced planning and increased costs may be' required to Page 111-6 I 'I 'revegetate with such materials Sources for cuttings and seeds should be identified by the landscape architect, project biologist, or other revegetation specialist, as designated by the City. I Hydroseed 1: The composition of the hydroseed mix will be consistent with the species composition previously recorded for the site in the biological resources technical report This mixture will include both shrub and herbaceous plants (Table 1 and Map Pocket No 2) Because some material will I establish quickly, it is expected to provide some erosion control arid reduce potential weed 'problems. They will also add to the organic component of the soji. S I TABLE 1 NATIVE HYDROSEED MIX 1 Jefferson Street Bike Path Pounds per acre SI Artemesia douglasiana-Douglas' Sagewart 2 Artemesia palmeri-Palrner's Sagewart - 2 I Aremopis calzfornica-Yerba Mansa: 3 Frankenia grpndfo1ia-Alkali Heath - Haplopappus venetus-CoastalGoldenbush 0.5 Lupinus succulen tus- Arroyo Lupine 3 Lotus scopUriüs-Deerweed 4 Heliotropium curvassOvicum-Wild Heliotrope 'Heterotheça grandiflora-Telegraph weed Eriogonum fasciculatum (California buckwheat) 10 i Total 64 Container Stock Container stock to be used in this revegetation program is identified in the landscape plans (Map 1 Pocket No 2) Many of these species will establish quicker and more successfully this way. Several of these species include mulefat, arroyo willow, and four-winged salt bush. Species arrangement and densities are described below and on the landscape plans, and were determined .on a species-specific basis. I Page 111-7 I Plañt'.Densities.. Arrangement and.Species 'Comnosition Plant densities and arrangement for contàitier species listed in the landscape platiS'(Map Pocket Nos 1-3) were determined by the growth habits of each particular speces and its location within the overall landscape plan Marsh species plants have been placed in or immediately adjacent to the lagoon, itself Other npanan scrub species and trees were located at higher elevations (upland areas) and the hydroseeded mix, as described in the landscape plans, contains a mix of both upland and wetland plant species Based on the amount of water they receive, it is expected these 'plants will compete with each other for location, nutrients, . and dOmihance within, the applied areas. ', 0 The hydroseed slurry will contain the listed native seed, mix at 64 pounds per acre, plus 2,000 pounds per acre Of cellulose wood fiber and 160 pounds per acre organic soil 'stabilizers. This hydroseed slurry will be covered with an overseed mix containing 10 pounds per acre of California buckwheat No hydroseed mix will be sprayed within two feet of the lagoon water's edge, and no'.runoff of fertilizer or hydroseed slurry will be allowed into the lagoon The: species composition of the 'hydroseed mix as well as the container species used in the revegetation plan was determined by the existing onsite native species composition, as well as the commercial availability of these plant materials. INSTALLATION For native plants, the best survival rates occur when applicatio.n of hydroseed or p1anting of container stock is completed in the late fall or early winter (November through 'February). This would take advantage of the seasonal rain fall Installation should be done concurrent with construction If this is not within the appropriate planting period, as suggested above, then supplemental water requirements for the species should be evaluated bythe landscape architect and monitoring biologist. 0 0 Page 111-8 IRRIGATION As required by the City of Carlsbad, thervegetàtipiar Will include installadbriöatempöraiy irrigation system The goal of this native revegetation program is the creation of habitat that is self-supporting and will persist over long periods of time without additional human involvement, however, a temporary irrigation system is deemed necessary. Irngation rates and quantities should be determined by the landscape contractor, in conjunction with the landscape architect and Project biologist Should the goals of this program not be attained within a reasonable amount of time, the City of Carlsbad may require modification to the proposed lmgatlon schedule Supplemental irrigatiOn will be permanently discontinued after the project biologist and landscape architect determine that the restored habitat is self-sustaining. EROSION CONTROL. Prior to project grading, the project biologist and landscape contractor will evaluate the revegetation area for existing erosion problems and identify areas with potential erosion problems The City staff and the project engineers will be notified, as necessary, for authorizing any ref nedial. measures to be conducted. The following erosion control standards shoul. be met before and during revegetation monitoring (1) all gullies shall be repaired, seeded, and mulched, and the source of the erosive flow redirected or restricted, (2) all rill and sheet erosion areas shall be repaired, seeded, and mulched, and (3) all exposed soils capable of eroding, as determined by the above, shall be seeded and mulched using an appropriate native hydroseed mix, such as that recommended in Table .1. MAINTENANCE AND MONITORING Maintenance and monitoring of the revegetátion site will be required after installation of vegetation, to ensure habitat establishment and determine compliance with success criteria It is anticipated that maintenance during establishment will be primarily the responsibility of the City of Carlsbad or its agent, with input from the project biologist. Page.JII-9 I Maintenance The maintenance program has several goals 1) monitor the physical functioning of the irrigation system to ensure it remains operational throughout its planned use and to identify needed repairs I or malfunctions, if any, 2) replacement of dead, dying, insect infested, or diseased plant 'materials; 3) repair any fdrms Of vandalism or dccidêrftal damage to irrigatiOn, fencing, or I restoration materials, and 4) removal of invasive weedy species within the mitigation restoration J ii area All maintenance activities shall be under supervision of the project biologist throughout I the five year mitigation program Maintenance inspections shall be conducted quarterly for the first two years, and twice yearly, thereafter, or ai s needed iO perfrni the above-mentioned maintenance tasks. ' i Monitoring Qualitative Monitoring The qualitative monitonng program has several goals, including qualitative evaluation of the I plantings and u-ngation, identification of pest, disease, and vandalism,"deterrmnation of plant survival, and control of competitive, noh-nätive vegetation.. The irrigation system should be checked routinely until plant establishment has been determined by the landscape contractor, in conjunction. with the project biologist. Irrigation lines will be reviewed during each of the 90 day inspectiOns If anylines are in heed of repair, the contractor I will be notified within seven days and the problem will be corrected within two weeks In addition, if any vandalism occurs, such as illegal dumping, trampling by pedestrians or other inadvertent harm to the species then these problems will: be eialuãted' and resolved as soon as possible. • • •• •• A visual insp'ection of all plant materials will be made by., the landscape contractor,, in I consultation with the project biologist, oii a monthly basis for the • first six months following installation, with visits every 90 days thereafter for the remainder of the first two years. All I ' losses in excess of 10 percent for the first year will be replaced in-kind by the landscape onactor, unless it has been determied by the project biologist and landscape architect that use I • • ':.. • • Page 111-10 of another species and/or other stock size would better achieve reveg etation goals Thereafter, plant materials would be checked twice annually for the remaining three years by the project I biologist, as part of the technical monitoring and assessment Replacement plantings would be performed by the landscape contractor under direction of the project biologist each fall or winter, as necessary, to achieve a survival rate of 80 percent for years 2-5 Weedy, non-native vegetation will be removed, as required by the monitoring biologist, to prevent adverse competition within the revegetation area.-"Sp eicific species identified for removal I in the riparian habitat include all tamansk (Tamanx sp), giant reed (Arundo donax), tree tobacco (Nicniana glauca), castor-bean (icinus communi), and/or pampas grass (Cortadena sp) which ' may develop Additional non-native species, as identified by the monitoring biologist, may also be targeted for removal. S I Quantitative Monitoring A five-year quantitative monitonng program will be conducted by the project biologist, in conjunction with the above qualitative monitoring proram The quantitative monitoring program is designed to gather data on the success of plant establishment, habitat development, and to formulate plans for remedial actions. : •. I Monitoring will be conducted by a biologist with experience in revegetation programs and I commence following completion of planting and hydroseeding operations Quantitative analysis shall Consist of measurements using six, fixed 1 by 1 meter quadrants (two quadrants within each 1 habitat type) Measurements in the quadrants will include height and Cover for shrub species and groündcover for herbaceous species. The. percentage of invasive exotic specieswhich develop I during the five year monitoring period will also be determined Quadrant measurements will evaluate percent cover of the hydroseed mix as it germinates, using a grid system All trees and shrubs within the revegetation area will be measured to ensure continuous growth during the five - year monitoring program. measurements will include tree height, girth and crown cover. .1 Monitoring. Schedule Appendix A of this report outlines the n schedule for monitong of the revegetation project over a five year, period. Quantitative analysis will be conducted quarterly the first year, twice.annually the second and third years, and annually, thereafter. All qualitative monitoring will be conducted quarterly each year, unless remedial action is required Thereafter, monitoring may occur more often depending on the extent of remèdiation requires. Annual reports will be completed each year for a total: of five reports. Letter reports will be submitted .after each monitoring period. Should any remedial action be required, the City of Carlsbad would be notified prior to corrective actions being taken. Remedial actions required would be summarized in each annual report. D. PROTECTION OF THE LAGOON The restoration area, as well as the, entire south shore of this portion of the lagoon east of 1-5, should be protected from vandalism and other human encroachrnent through placement of a permanent, aestheticàily-designéd fence. This "fence 9hould be designed in accordance With City and CDFG guidelines to prevent access to the open ..spaces adjacent to the .'.south shore of the lagoon 'by vehicles, pedestrians, and those who would, illegally dump debris. To. protect the lagoon from off-road bicycle-and pedestrian encroachment, signage may be required. A clearly visible sign system should be installed along Jefferson Street to educate the general public regarding the revegetation effort in progress and the sensitive nature of the lagoon habitat. - This fence will be erected and maintained by the City of Carlsbad or its designee. It is suggested that this fence be designed and installed to serve more than just, a protectivefunction. The"fence should be created to provide a supplemental, 'aesthetic characterto the area, without detracting from the natural setting of the lagoon. It is further* recommended that fence design allow for viewing, of wildlife and the lagoon itself. The Buena Vista Lagoon Nature Center should be consulted regarding incorporation of design features which would augment existing facilities. located around the -lagoon. Recommendations for indirect impacts associated with silt and, pollutants from the widened roadway-and increased pedestrian traffic include the installationbf facilities to limit both of these effects. The first may be controlled through the useof a gravel filter at the storm drain inlet Page 111-12 U U (Figure 17). This may be required as part of the new Regional Water Quality Control Board Order 90-42 limiting pollutants from storm drains into natural waters. The gravel drain is expected to collect petroleum-based products, such as oils and grease, as well as silt, thereby - limiting the amount of these pollutants and sediment entering the lagoon from this area. I 1 I I HI Page 111-14 I I REFERENCES I P&D Technologies, 1991 Freshwater Marsh Mitigation Monitoring and Reporting Program for the SR-56 Roadway Extension Project December, 15 pp P&D Technologies, 1990 -'Biological Analysis of the Jefferson SUeet Roadway Widening April, I I Recon, 1991 Revegetation Plan for the SPA III Development Unit of the Rancho Del Rey Specific Plan, September, 22. pp. U;S. Department o Agriculture, 1973. Soil Survey, San Diego Area, California. Soil Conservation Serviceand Forest Service, December; Virgilio, A 1991 City of Carlsbad, Municipal Projects Division, personal communication with E. Robertson, (Design Concept; Urban PollutantGraveFilter. 1 :1: .:... :1 S 1 5 5 5 S • I " .5. 5 S. is S .5 :1 REFERENCES P&D Technologies, 1991 Freshwater Marsh Mitigation Monitonng and Reporting Program for the SR-56 Roadway Extension Project December, 15 pp P&D Technologies, 1990 - Biological Analysis of the Jefferson Street Roadway Widening April, 12 pp I ,Recloiil 1991 Revegetation Plan for the SPA III Development Unit of the Rancho Del Rey Specific Plan, Se ptember22 pp. U.S. Department of Agriculture, 1973; 'Soil Survey, San Diego Area, Califàrnia. Soil Conservation Service andFórest Service, 'December .' Virgilio, A 1991 City of Carlsbad, Municipal Projects Division, personal communication with I. E. Robertson,' (Design., Concept; Urban'Pollu;antGrave Filter)' S , S S •, 5 5 .55 .5 'I I Page 111-15 • ..: '• .. I 1 APPENDIX A MONITORING SCHEDULE Task Time line Attendance Meetings Pre-construction As determined by the City I Post -construction Annual I Construction Twice weekly to As determined by the City monitoring completion I Exotic tree Construction period As determined by the City removal I Revegetation As determined by the City collect seeds/cuttings Six months prior to construction irrigation Quarterly for first As determined by the City txl.: two years, twice per year, thereafter I erosion control On-going throughout As determined by the City construction and monitoring periods . • U plant .• material Quantitative, quarterly As determined by theCity -. . for first ye, twice . • : '.. I .; . .. yearly for years 2 & 3, .. .. . .. . .. and annually, thereafter . . :1 .. . • ,:.Qualitative; quarterly ........ throughout 5 year monitoring . . period I I I I I I & I I BIOLOGICAL ANALYSIS OFTHE JEFFERSON STREET ROADWAY WIDENING I 1 . S Prepared for: . S The City of Carlsbad .2075 Las Palrnas•.D'rive •. Carlsbad Califorma 92009 I Project Manager Gary Kelhson I . . Prepared by: . . I P&D Technologies 401 West AStret S Suite 2500 : S San Diego CA 92101 Attn: Elyssa Robertson S TABLE OF CONTENT Page INTRODUCTION 1 EXISTING CONDITIONS 2 Vegetation Sensitive Plant Species Wildlife .Sensitive Wildlife Species IMPACT ANALYSIS 7 MITIGATION AND RECOMMENDATIONS 8 INTRODUCTION This biological technical report has been prepared to address the potential impacts associated with the widening Ôf:Jefferson 'Street. The biological. Survey was conducted to :deteimiré the areas' sensitive biological resources Sensitive biological resources are defined here as'h'bitats, and 'plant.'or animal species that are listed by the California Dpartment of Fish and Game (CDFG) or the US Fish and Wildlife Service (USFWS) or are considered depleted or declining locally. The proposed Jefferson Street widening project is located predominantly along the northern side of the existing Jefferson Street. Jefferson Street, cwTently exists as a busy'two lane road immediately south of Buena Vista Lagoon The project boundaries are from Man-on Road to the east and Interstate 5 to the west (figur'e's 1 and 2) The area of impact was surveyed on February 18, 1991 by P&D botanist Elyssa Robertson and wildlife biologists Ray Vizgirdas and Doug Willick Pievious to the biologist's survey the P&D land, surveying crew marked and staked the limits of impact along the roadway northern side of the roadway. The limits of impact were based on a.-l"=20' site plan provided by the City of Carlsbad. Vegetation was mapped on these l"=20' base mapsand are included in the attached map pocket. All plants, animals and habitats encountered during the biological survey were identified In addition birds observed adjacent to the zone of impact within the lagoon were also noted Wetlands analysis was conducted primarily on vegetation dominance and hydrology. Dominant vegetation components were'noted along the entire length 'of roadway withi'nthe zone 'ofimpact. These areas were plotted per 'segment as designated by the survey 'markers. Two soil samples (using an 18 inch hand auger) were taken along the proposed ioute One within the disturbed wetland habitat and one within the wetland habitat. A.soils analysis was not conducted as part of this study because much of the soils encountered were artificial fill or soil The soil samples were taken primarily to locate the depth of saturated soil. ' 1 Temecula Riverside County Mt. <n Fallb 00k a 78 Camp -Pendleton Ow.,SLate -. - Project Site Is . - Valley Center Oc..na,ae flarbO, - Vista - Oceanside --. •' Sin Lake warnla,d Duec. Be.,,. vista L.Qaar Marcos • Apu Hediat'p. LegeBe Escondido -TI Carlsbad Suthertene tcI,8; e Betia,teC Lagoon - ,• Deguta - - Like HOOQO5 - -. Ramona - Encinitas -- - - Reecho Laa Reman. - - - - Bernardo - Rancho San ENO Lagoon - Santa Fe C - LitCCuyC'niee agoon San Depute - - - L.gaae • -. San Poway 0t 79 Lagoon Mba Mesa Santato 5 - •: Santee-67 La . 52 - -. - Jolla Alpine LeeetaeB Ei Calon A ast Boy Mission • .5 La Mesa San Diego --s. ,. - Lémo Gr ye 5 - 5 - Mar.ni c... son D.go Nat n City Coronado e.. - uag.'Ot.F - .- it Chula Vista eB y • • Imperial Beach ' •: • - T,,uiea Efleo ty Otay Mesa - - - 5 - Mexico - - -• • -• - • S - Tijuana - • S - C - arlsbad - ------------ NC AL 5LCem>!&H S •Sf t1HE 1E If .. ' ? / ( r N - Country Sewage C) I S'\• •&SS / " LZL NX V cc -Buena Via IoQ 'TIIS tu LAGUNA ligh 0. hi beh Valley 141 CA RLSBAD' S efn) 55 ie- : flr-• - . Ir :1 Scale: 1' = 2000' L_) Source: Source San Luis Rey 7.5 Minute Quadrangle Figure 2 Vicinity Map. S YcLaL1uII Habitats along the proposed widening of Jefferson Sueet Irom 1-5 4o 'Marron Road consist of three types (Figures-,3-8): disturbed, disturbed wetland and wetland habitats Disturbed habitats are defined as areas that are either barren or support non-native weedy or ornamental species On.this project disturbed areas within the zone of impactincludea small dirt path for pedestrians, I barren areas, eucalyptus trees (Eucalyptus sp.), and slopes dominated by ice plant (Carpobrotus I sp.). These areas appear to be continually disturbed thiough human activities and were originally formed through construction of Jefferson Stieet The existing Jefferson Street appears to have I been constructed on artificial fill near the east end and on a cut in the hillside on the west end It is unknown whether or not wetland conditions occurred under the ioadway at the time of I original fill for construction at the east end The area has been disturbed long enough however, that the regeneration of wetland habitat is unlikely. Therefore, for the purposes of this report, areas not supporting native plants are considered disturbed. I Under federal regulations, wetlands are defined as areas that ar inundated or saturated by surface or giound waters at a frequency and duration to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions Three factors are considered in the designation of wetlands:,The presence of I hydrophytic vegetation, hydnc soils and wetland hydiology. A minimum of one positive wetland indicator from each category must be foutmd for theU.S. Army Corps of Engineers(ACOE) to determine an area to be wetland (USACOE 1986) Areas indicated as wetlands by all three factors during the rainy season may lack the indicators of hydrology and or.vegetation during the I dry season, or the vegetation may have been altered or removed through human disturbance. Such areas may still be regarded as wetlands by resource agencies For this project site these 1 areas are considered disturbed wetlands Disturbed wetlands are defined by the USFWS in the Unified Federal Method of Wetland Delineation as I "Disturbed areas include situations wheme field indiLatoms of one or more of the three wetland identification criteria are obliteiated or not present due to recent change" Q "wetlands that under natumal conditions are simply difficult to I identify, such as wetlands dominated by upland spLcies wetlands lacking field I 2 roll ywe W#Ire PCR c4(LrR4sJ 7 FROtI q.c'/9v (riP/CAL) TR.q,v3, ' j I R.. APd I'EX1.57 19 AJEA(& 4T" 00 F6 A NO Z' fAIL CAt .. C." co,/3rRucr PR C.SEE LEGEND Limits of Impact ME Disturbed Wetland Eli Disturbed Habitat 0 20 40 GO Source: Keitner & Associates, Inc. i-igure 4 VVetland Delineation of Jefferson Street Widening \ JI H' Jj cJ!M\ YJJI Y% sD i) I .- I. TYPI Ft PE((ti(ATO5 - @ (00'MreRv45(ryP) S . I I— — — — — — — — — — — - — — - — — — - - - — — - — - — - is 27 R' f200 L - L -1 1— I%o3c 48.'-. — — — — — — — - N41' 3' ' I jerF-Ceg S AE 0 "XI 5T4.C. • - V 19 r,pE Pr c -- - •• - C LEGEND Limits of impact EM Disturbed Wetland Disturbed Habitat: 0 20 - 40 GO Source: Keitner & Associates. Inc. (7j - Figure 5 Wetland Delineation of Jefferson Street Widening tj 72DRR/NRAW ,'ogD/JQv (7% /1/Al.) - -. jr B6RIJ - — - — 7V 82R6'1OV ILI 2Z'40 O — — — - — - - OW R PE - --- - r-44 r'14A-9 4.325300 c'9c I LEGEND Limits of Impact Disturbed Wetland LIII Disturbed Habitatz o 20 40 (0 ource: Keltner& Associates. Inc. Figure b . Wetland Delineation of 9D Jefferson Street Widening EX/T flEEI1T0 TY CV LEGEND 16NA(- . .. TRr" Ii I - I I I I I I I I I I Zzz 3g~ 11 Source: Keitner & Associates, Inc. I Limits of Impact Wetland Disturbed Habitat 0zo 40 (0 Figure 7 Wetland Delineation of Jpfferson Street Widening -, r• . -.--..---.---.- .--. (TYP6 I =V66 CVY51T PAINTED 4-6 -' -IL FE 42 i' 90N ' ' 44 Ey 7,0 RCt4AIN X/5 46ye, 7—Inge 67XI Rem Ov RIELILOW YE \ s TR 615 7, Iz. 1b, kh 91 7" 3 .I r LEGEND LII Disturbed Habitat. a 20 40 (.0 Source: Keitner & Associates, -41c. Figure 8 VVetland Delineation of vz~ _____ Jefferson Street Widening I I indicators for one or more of the technical criteria for wetlands, and wetlands occurring on difficult to identify hydric soils' S S. The disturbed wetland within the impact zone of Jefferson Street does not have the indicators of I hydnc soils or hydrology. It is however dominated by (greaterthan 50 %) of facultative wetland plant species , arrow weed (Piuchea sencea) Facultative wetland plants are defined as plants I which usually occur in wetlands (estimated probability 67% to 99%), but are occasionally found in nonwetlands (USFWS 1988) The understory of these areas are either bare ground or a weedy 1 assemblage of ice-plant and other non-native species Wetlands within the study area were areas which ehibited a marsh growth, contained sandy soils and soil moisture was within two inches of the surface. Plants ddminated within this area included cattails (fypha latifolia) American bulrush (Scirpu', ameiicanus) and spiny rush (Juncus acutus var. sphaerocarpus). Sandy soils, though not a true anaeiobic soil, is listed on theUSDA list Of.hydric soils (USDA 1985). In addition, after taking two soil, samples within this area, excessive soil moisture was noted within two inchesof the soil surface. To meet the hydrology I criteria soil moisture must be within six inches fioin the surface (Wetland Training Institute 1989). SENSITIVE HABITATS .AND PLANTS 'u .. Sensitive habitats are those which are considered rare within the region, are listed by the I California Natural Diversity Data Base, or support sensitive plants or animals The only sensitive habitat on-site is the wetland habitat along certain portions of the proposed bike path. 1• .5 0 Wetlands are subject to the Clean Water Act periit;proisions regulating their filling. Thee are I enforced by the ACOE and the U.S. Environmental Protection Agency, with technical input from the U.S. Fish and Wildlife Service Wetland habitat is naturally limited and remaining acreages are important island habitats for migrant buds Many bud species 'are restricted to wetland habitat and are dependent on it for breeding. 0veia11, wildlife diversity is normally higher in I wetland areas than in surrounding habitats Appioxunately 0 09 acres of disturbed wetland habitat and approximately 0.012 acres of wetland habitat exists in the study area I I High interest plants include those listed by the U S Fish and Wildlife Service (USFWS, 1985), California Department of Fish and Game (CDFG 1985) and the California Native Plant Society I (Smith and Berg, 1988) The CNPS Listing is sanctioned by the California Department of Fish and Game and essentially serves as its list of candidate" species for threatened and endangered status Table 1 lists the sensitive plant species known from the area but not observed I One sensitive plant species was noted onsite pjj ]i yj is listed by the CNPS as a plant at limited distribution (List 4) Jjp1 an abi tatofthetwetland I I WILDLIFE I Wildlife species detected during the survey are listed in Attachment B of this report 1.. Amphibians Though no amphibians were detected during the project survey, several species could potentially I occur in the wetland environment of the lagoon and upland habitats adjacent the project site These would include the Pacific treefrog 11y1a regillaj, garden slender salamander (Batrachoseps I pacificu), bullfrog ana catesbeina) California toad CBufo boieas) and the California red-legged frog (Rana aurora draytonii) I Reptiles Only one reptile was detected dung the pioject survey, the westein fence (Sceloporous 1 occidentalls). Otherpotential1y occurring species could .include the side-blotched lizard (Ut stansbunana) and the gopher snake (Pituophis me1ano1eucu) Birds I Forty six species of birds were observed in the lagoon and adjacent upland areas of'the'prOject I area (Attachment B). Those, detected immediately in the pioject.area include the marsh wren I - - - - - - - - - - - - - - - TABLE'! SENSITIVE FLORA KNOWN FROM THE AREA BUT NOT OBSERVED ONSIFE Status S Name Federal State CNPS Comments Adoiphia Californica None None List 2 1-2-1. Threatened by urbanization California adoiphia Ambrosia pumila Candidate (C2) None • List lB 3-:2-2 : ' ' Found in dry, sunny places, along roadsides etc, San Diego ambrosia 100 600 Brodiaea filifolta Candidate (C2) Endangered List lB 3-3-3 Seriously threatened by residential development "Thread leaved brodiaea" 5 '5 .S • and off road vehicles. LN e AM Ceanothus verrucosus None None List 2 1-2 1 Threatened by development wart stemmed ceanethus iii9tudyzarea Dudlcya viscida Candidate (Cl) None List lB,'3'2-3 Found in dry rocky places below 1200 feet Not sticky dudleja Eryngium aristulaluin parishui Candidate (Cl) Endangered List lB 1-3 2 Threatened by urbaniLatlon jia1ntenance "an Diego, button celery: S and off road vehicles. W li l•l t'ccUr in S. . Tsfud Harpagonella palirieri palmeri ' None None List 2,.1-2-1 On dry slopes and mesas below. 1500 feetjNTt "Palmer's grapphinghook" CCistothorus palustri), sora (Porzana carolina), black-necked stilt CHimantopus mexicanj), common yellowthroat (Geothylpis tiichasj, yellow rumped waibler (Dendroica coron_aa), red- winged blackbird LAgelaius phoenice), and song.,sparrow (jylelospiza melodia) Mammals No mammals were observed on-site Potentially occurring species in or adjacent the project area may include pocket gopher c.'Ihomomys botta), cottontail (Sylvilagus audubonii), Virginia opossum (Pidelphis viriniana), raccoon (Procyon lopU and deer mouse (Peromyscus sp.) SENSITIVE WILDLIFE dbyth FWS, 1985) or. the California Department of Fish and Game (CDFG, 1980). Sensitive wildlife species reasonably likely to occur are discussed below and summarized in Table 2 of this report. The only sensitive amphibian known from the general vicinity of the project site is the red-legged frog Rana aurora draytonii), which is protected by the Califoinia Department of Fish and Game (1982) and is a candidate (Category 2) for federal listing as threatened .or endangered This species frequents marshes, slow parts of streams, lakes, reservoirs, :,ponds and other permanent water sources It occurs pnmarily in wooded are-as in lowlands and foothills, although it can also be found in grassland It is particularly attracted to fieshwater maish areas with sufficient vegetative growth to provide cover and prefers cool flowing water. It is unlikely that the species occurs within the actual project site which lacks suitable habitat. The following species are associated with wetland enviionments the great blue heron (Ardea heroides) and the black-crowned night heion (Nvcticoiax nycticoiax) Both of theses -pecies were observed in the lagoon and it is highly unlikely that they occur or even utilize the wetland habitat of the project site. 5 - - - - - - - - - - - - - - - - - - - FABLE 1 SENSITIVE FLORA KNOWN FROM THE AREA, BUT NOT OBSERVED ONSIFE Status Name Federal Slate CNPS Comments Adolphia Californica None None List 2 1-24, Threatened by urbanization Not expected to 'California adoiphia occur in study area Ambrosia pumila Candidate (C2) None List 1B, 3-2-2 Found in dry, sunny places, along roadsides etc 'San Diego ambrosia" 100 600 ft Not lik'ly to occur in study area Brodiaea filifolia Candidate (C2) Endangered List 1B, 3--3-3 Seriously threatened by residential development Thread leaved brodiaea and off road vehicles Not likely to occur in study area. Ceanothus.verrucosus None None List 2, 1-2-1 Threatened by development. Not likely tooçcur "wart stemmed ceanethus' in study area. Dudleya viscida Candidate (Cl) None List lB 3:-2-3 Found in dry rocky places below 1200 feet Not sticky dudleja likely to occur in study area Erynium aristulatum parishui Candidate (Cl) Endangered List lB 1'3-2 Threatened by urbanization road maintenance San Diego button celery and off road vehicles Not likely to occur in • • • study, area. • • Harpagonella palmed palmeri None None List 2, 1-2-1 •- Ondry slopes and mesas hrlow 1500 feet. Not "Palmer's grapphinghook" • ' • • likely to occur in.study area. ••••• • I The great blue heron is considered sensitive inSan Diego County by Everett (1979) because it nests regularly at very few sites and feeds in wetlands. This species occurs throughout the year in the County and nests colonially in tall trees near wetlands. Only three regular colonies are I known in San Diego County: Point Loma, San Dieguito Valley and Lake Henshaw. The black-crowned night heron though still fairly common, is considered sensitive be Everett (1979) because its known breeding colonies are few and vulnerable t disturbance. The species nests in freshwater marshes, willows or non-native trees. Birds of prey (raptors) as a group are considered sensitive because of loss of foraging areas, their vulnerability to human disturbance, their low population densities, and their position at the top of the food chain. A red-tailed hawk (Buteo jamaicensis) and an osprey cPandion haliaetus were observed flying over the Buena Vista lagoon and possibly forage in the general area. The project site itself offers very little in the sense of foraging or nesting opportunities for either one of these two species. rel IMPACT ANALYSIS The proposed project cónsistsof the widening of xisting Jefferson Street to accommodate t'O eight foot bike paths The majority of the widening would be conducted on the north side of the I street with some widening on the south side neai the intersection of Jefferson Street and Marron Road In addition to the actual paved areas of expansion the extension would be designed to I drain away from the roadway and into the lagoon Therefore I additional acreage of impact would occur. past thepayed area. These areas as.shown onthe attached planns wereanalyzed for-this 1 report as the- impact zone. S I The impact anal ysist.was based on habitat within the impact ione and indiiect impacts associated- with drainage into the lagoon Acreage analysis was not conducted for areas outside the impact zone I The proposed project would directly impact 09 acres ofdistuibed wetland habitat and 01 acres I of wetland habitat Impacts to wetland habitat, though not huge is considered, significant by the USFWS and the CDFG Impacts associated with the loss of spiny rush is not considered ' significant at this time due to its low sensitvity status and the abundance of this 9"p ecies within the protected lagoon habitat The remaining area within the zone of impact as shown on the attached plans is considered disturbed habitat Impacts to these areas are not consideied significant Indirect impacts to the habitat and wildlife of the lagoon associated with the road widening-ma y occur. Indirect impacts that may occur include increased erosion due to additional surface water runoff, increased pollutant runoff from the roadway associated with oil, grease and asphalt and increased usage of the area by pedestrians and recreational users These impacts are considered potentially significant based on the amount o( increase* for each. The determination of this increase is beyond the scope of this report. 7 -.-: - S ••• -- - -: 5•L- MITIGATION AND RECOMMENDATIONS If feasible mitigation is required (under CEQA.) for 1i,significant impacts. Mitigation can either reduce impacts to below, a level of signiifcanôe or partially mitigate impacts but not to below a level of significance Mitigation guidelines discussed below aie given in order of preference for the wetland impacts. Wetland impacts (disturbed and not disturbed wetlands) could be avoided through the redesign of the roadway project The roadway widening could be constiucted on the southern side of the road rather than the sensitive northern edge. Alafge lopeexists"for themajority of the roadway on the southern side which may cieate some constraints for constiuction on that side If the roadway was redesigned for all construction to occur on tIesouth side then no signifiCant impacts to wetlands or disturbed wetlands would be expected to occur. 'If redesign of the roadway is infeasible then the following mitigation is rèquird; The limits of act will be clearly staked and flagged by a suivey ciew and biologist immediately prior to clearing or grading. The construction foreman will be informed by a monitoring biologist of the sensitivities of the adjacent lagoon habitat and any impacts to areas outside of the flagged areas will be prohibited If impacts occur inadvertently, then remedial mitigation will be required The construction of the roadway will be monitored by qualified terrestrial biologist knowledgeable of wetland habitats. To mitigate the direct loss of distrubed wetland and wetland habitat offsite enhancement is recommended. Enhancement will include the removal of exotic trees (e.g., Canary Island palm, Eucalyptus trees and giant reed) along the length of the roadway expansion and.replacement with native wetland species (willows Salix sp and marsh species Scirpus Sp. Typha sp. and Juncus sp.). The exotic species for removal 'willbe identified by a qualified botanist and removed by 'a landcape contractor or the City of Carlsbad. The removal, plan should be approved by the CDFG (which manages., the lagoon) before i,mpelmentation. If the CDFG does not approve the plan th'aii further mtigiation may be required. ¼, 8. H I 77 Recommendations for indirect impacts associated with silt and pollutants from the widened roadway and increased pedestrian traffic include the installation of facilities to limit both of these I effects The first may be controlled thorugh the use of a giavel filter at the is torm drain inlet This may be required as part of the new Regional Water Quality Control Board Order 9042 U limiting pollutants from strom drains into natrual waters. The gravel drain would presumably collect oils, grease ànd silt thereby limiting th,afriàunts of these pollutants into the lagoon. These drains may require annual inspections to ensuie thay arnctioning properly If they are found not to be adequately collecting oils and giease fiom the ioadway then remedialaction must 1 be taken by the City ofaElsbad. To protect the lagoon from off-road bicycles and pedestrians signage may be required A more 1 , clearly visible sign system may be installed along the lagoon to educate thgêneral public regarding the sensitive. nature, of the lagoon habitat. No further mitigation measures are required for the proposed project. 1 ';: •. VI U I I I I I , LITERATURE CITED American Ornithologists Union (AOU) 19,83.The Check-List of North American Birds, 6th ed Allen Press, Lawrence, Kansas. California Department of Fish and Game (CDFG) 1980 At the Crossroads A Report on the Status of California's Endangered and Rare Fish and'Wildlife. Stai'of.CalifOrnjaRésourèes Agency, Sacrament, California. California Department of Fish and Game (CDFG) 1986 Endangered Rare and Threatened Animals of California" State of California Resources Agency Sacramento, California. California Department of Fish and Game (CDFG) 1987 Designated Endangered or Rare Plants" Summary list from Section 1904 Fish and Game Code (Native Plant Protection Act) State of California Resources Agency, Sacramentb, California. Everett, W. T. 1.979. Sensitive, Threatened and Declining Bird Species of Sn Diego County. San Diego Audubon Society "Sketches." Jennings, M. R. 1983. "An Anflotated Check List Of the Amphibians and Reptiles 'ofCálifbrnia." California Fish and Game 69(3):15I-171. . Münz, P. A. 1974. A Flora of Southern California. Universit' of California Prss.Berkeley, California. . Smith, J. P., and K. Berg: 1988. California native Plant Sociët's Inventory of Rare, and Endangered Vascular Plants of 'California. Special Publication No. 1 (4th Edition), California Native Piait Society. United StatesFish and Wildlife Service (FWS). 1987* Endaiered and Thtéatened Wildlife and Plants Federal Register 50 CFR 17 11 and 13.12 U S Department of-'the Intenor. Wetland Training Institute Inc. 1989. Field Guide for Delineating Weland: Unified Federal Method. WTI 8971 131 pp. .U.S.D.A. 1985. List-of Hydric Soils for California. I ATTACHMENT A - Observed 'Floral. Specie's Scientific Name Coinmon Nane Ambrosia psilostOchya Western Ragweed Atriplex canescens Shad Scale Avna s1D. Wild Oat I Baccharis glutinosà . Mule Fat Brassica geniculara Pei ennial Mustard Bromus rubens Foxtail Broine I 3arpobi.•otus edule 'Hottentot Fig Distzchlis spicata Salt Grass Encelia califoinia California Sunflower Eriögonum fasciculatum S Flat-top Buckwheat Erodium cicutarium Filaiee I .. Eucalyptus canialdulensis 1 Murray. RedGum Festuca me ga/ui a Foxtail Fescue Foeniculum vulgaie Wild Anise I Gnapthalzum bicolor Bicolor Cudweed Haplopappus venerus Coastal Goldenbush Heliotropium curvassavicum Wild Heliotrope Juncus acutus var sphaerocarpus Spiny Ruh S Mesembiyanthemum ciysrallinuni Ice Plant Oleaeuropa European Olive Phoenix canariensis Carnary Iftand Palm Ricinus communis Castor Bean 1 Salixiasiolepis Schinu.c terebinthifolius Arroyo Willow Bailian.Peppertree Scirpus americana American. Bulrush Typha latifoiza Cattails I A triplex sémibacata Australian: Saitbush Chenopodium ambrosioides ' Mexican Tea1' Frankenia grandifolia Alkali heath I Heterotheca giandiflo, a Telegraphweed Pluchea se, icea Arrow-weed I Urtica u ens Stinging Nettle I 1 I 11 - AtPAC11MENT'B Observed Wildlife Species Within.Büena:Y.istIJagobn arid Within the Prbject Area ai Scientific Name Comrnon,Nanie .Reçurvirosa americana ., Ameriéan Avocet Fulica americana , American Coot Pelecanus' eiyrhrOrhynchos : American White Pelican Nyctzcorax nycricolax Black-crowned Night Heron Himantopus mexicanus lack-nècked Stilt Bucephala aibeola Bufflehead Psaltriparus minim us S ' Buhti Geothylpis trichas. Common Y'ellowthroat •• Phalacrocorax auritus Double-crsted cormorant Podiceps. nigrico'llis Eared Grebe Sturnus vidgaris European Starling A',zas strepéra ' ' Gadwall, Ardea Jierodias - Great Blue Heron Anqs ci ecca Green-winged Teal Chäradriüs vocferans , :" Kilideer. ' Carduelis "psaltria Lesser Goldfinch Aythya affinis •. ' LeSser 'S,aup Anas platyrhynchos Mallard Ci•stotho,us 'palustris Marsh Wren, Zenaida macroura Mourning Dove Anas clypeata -. Northern Shoveler Pandion haliaetus : Osprey Podilyrn bus pbdiceps Pied-billed Greb Buteo jàmaicensis : Red-tthlèd 'Hawk Agelaius óhoeniceus ,• , Red-wihgedBlackbird Oxyura jamaicenis Ruddy Duck Aphelocoáma 'coerulescens Scrub Jay Egretta rhula ' Sno', Egret Melospiza :melodia •. f S Song Sparrow Tachycineta bicolor Tree Swallow Aechmorphoius occidentalts Western Grebe Wilsonia pustila Wilson's Warbler Chamaea fasciata Wrenm Dendroica coronata S Yellow-rumped: Warbler _- - -- - ---- ---- -- ------m --- --- --.--- ------- - -- CIT Y CARLSBAD j Z&) LUcY 0< 00 L 0 0 I L >->- F--- 3i3 LANDSCAPE MITIGATION PLANS FOR r 1< rr ~N, W H11 LAGOON L.L 13.3 i21 '// I VISITATION AREA IRJ SHEETS 2 & FOR 7NLARGEMENT.j/ . MAR RON RD. 7/ 77!1- ' 7~F SHEET INDEX SEE SHEETS 3,& 5 FOR / ENLARGEMEN]T /x / /12.1 SHEET NO. TITLE 1 Title Sheet/Plant Removal Plan 0 100 200 300 Graphic Scale: 1" = 100' 2 Planting Plan 3 Planting Plan 4 Irrigation Plan 5 Irrigation Plan L.' L-- I 1". VI '1 t- I.. I '- '' IA- 'I t...-i &. 1 I f it 'i &..- IIPL D -ro POPUCE. PioR 1/7/ PCI-1. 64 flEA' 1*'cAL-9) XIIN RICINU CoMMMI- \N uCASTOI ' F'LNTS TO 13 RMOVD. CITY OF OCEANSIDE J XI'TIN&i aAL STi TO P)ZUNEO TO ' HICiH1 At'40 I}WL CITY OF CARLSBAD F'ROD1AC. tAF'1OI. PCH. 1 (STRUN-S "ALW.R) X'T1N I&NLJ COMMIAN)S- "&AS1O SEAN" FLANIS TO REMOVEP. 11 11I BUENA VISTA LAGOON -r-XV5TINGi PHONI( GANAR)ISJ - 1 11CAt'JAR'r' ISLIND PATE PALMS" 1S'T TO . MOVDAl.-ONi NITI-1 W.E. +/- 6.8 c44b. PIWNH TRUV4K J-J.IH - () A OTA OURTN (14) PALM -7 , NOT INCL. SKERS. TO RE~MOVE-10- XI ___ sTtNC ARW'400 EONA)(- IA IC PLANT' REMOVAL NOTES "t"JT R O CANJ ." CWMS TO MOVD/KILLED. Tree and Shrub locations are approximate. Plant material to be removed shall be tagged by the Project Biologist. )(ISTNGi RICIINUC.5 COMML4I415- Tree calipers and heights are approximate only. TO DE REMOVP. 7 E X I STINGS M YOPOR U M LTUM-7,/ "MOPO)UM"Tt -11q,134--- 77/1(17 / EXOTIC PLANT REMOVAL PLAN 2082 Contractor shall verify sizes in field. All plant' materia, shall be removed including roots, suckers, and volunteers unless otherwise noted.. Alternative removal method for palm trees with over four feet of brown trunk height is to cut palm trunk off at ground level, remove suckers, and apply stump removal compound to stump per manufacturer's instruc- tions. 00 5. Alternative removal method for Arundo donax is to apply the herb-icide "round-up" by hand-brushing the foliage as per xnanufactu:rer's recommendations.- 6. The killing of -plants shall be conducted in accordance with the mitigation program. IL SITE I DATE . 411111111113 7 tlo :: ati01. Details ifications WORK TO BE DONE These improvements consist of the work to be done according to these plans and the following specifications and standard GENERAL NOTES drawings: The Contractor's attention is directed to the possible STANDARD SPECIFICATIONS existence of underground facilities not known or in a location different from that which is shown on the plans i. Standard specifications for public works construction or in the special provisions. The Contractor shall take (19 91 edition). all necessary steps to ascertain thie exact locations of all underground facilities prior to doing work and shall protect the utilities or structures shown on these plans STANDARD DRAWINGS or which may be encountered and are not shown on the-.-e ,----,- plans. - 1. Regional Standard Drawings, Document No. 769374, filed June 3, 1986. Before excavating, the contractor shall verify the location of underground utilities by contacting each of 2. Standard Design Criteria and Standard Drawings, City of the following utility companies 48 hours in advance: Carlsbad (1987). Gas & Electric: S.D.G.& E. --------800-422-4133 3. Landscape Manual, City of Carlsbad (November 11, 1990). Telephone: Pacific Bell ---------800-422-4133 Cable Television: Cable Vision ------800-422-4133 Sewer: City of Carlsbad ---------619-438-5604 - Water: Costa Real Municipal Water District 619-438-2722 I hereby declare that I am the licensed designer of work for this project, that I have exercised responsible charge over The Contractor shall maintain the service of all the design of the project as defined in Section 6703 of the existing water and sewer utilities during construction. Business and Professions Code, and that the design is The Contractor shall be responsible for any damage to consistent with current standards. existing water and sewer mains during construction and shall have sufficient pipeline materials and equipment I understand that the check of project drawings and on-site to immediately repair any damage to existing specifications by the City of Carlsbad is confined to review mains, only and does not relieve me, as the licensed designer of work, of my responsibilities for project design. The Contractor agrees that he/she shall assume sole and ' complete responsibility for job site conditions during - These plans have been prepared in substantial conformance the course of construction of thus project, inc1udiñ with the approved landscape concept plan, water conservation safety of all persons and property; that this plan, fire protection plan, and all conditions of approval requirement shall apply continuously and not be llimited / related to landscaping. to normal working hours; and that the contractor shall defend, indemnify, and hold the City and the engineer P&D Technologies harmless from any and all liability, real or alleged, in 401 West "A" Street, Suite 2500 connection with the performance of work on this project, San Diego, CA 92101 excepting for liability arising from the sole negligence (619)232-4466 of the City or the engineer. The engineer' preparing these plans will not be By: Date:________________ responsible for, or liable for, unauthorized changes to, or uses of, these plans. All chanLges to these plans Robert L. Ryan, R.L.A. must be in writing and must be approved by the preparer Expires 10/12/92 of these plans. The Contractor will be responsible for mitigation and coordination with applicable resource agencies for any MDSCp `AS BUILT" disturbance of sensitive resources caused or allowed to L occur by the Contractor. - - /.' o' I' P&DTechnologies k N 2781 1 RLA_____ EXP._______ 1 P1 401 West "A" Street, Suite 2500 0. - San Diego, CA 92101 619'2324466 - REVIEWED BY' OF CAO'i INSPECTOR 13127192 r i-V-- I 1st CITY SUBMIFTAL I I I I SHEET CITY OF CARLSBAD SHEETS 1 ENGINEERING DEPARTMENT 7 REFERENCE DRAWINGS Improvements of Buena Vista Lagoon Visitation Area, Carlsbad Drawling No. 291-3, Project 3304 Improvements of Jefferson Street Bike Path, Carlsbad Drawing No. 291-3, Project 3154 DATE INITIAL REVISION DESCRIPTION DATE INITIAL DATE lNfl1AL ENGINEER OF WORK OTHER APPROVAL CITY APPROVAL TITLE SHEET/PLANT REMOVAL PLAN FOR: JEFFERSON STREET BIKE PATH LANDSCAPE MITIGATION PLANS APPROVED PE EXPIRES CITY ENGINEER DATE DWN BY: PROJECT NIO DRAWING NO. RVVDBY 3156 - J.N. 10112 PLANT MATERIAL LEGEND PLANTING NOTES Submit photographs of typical tree of each variety and size, to be provided under this contract for approval by the Landscape Architect prior to delivery of trees to the project site. Align double stakes perpendicular to prevailing winds. Contractor shall not disturb any existing plant material unless specifi- cally noted for removal on the Exotic Plant Removal Plan. Contractor shall rplace any damaged or destroyed plant material. - - ------.- -7- Approxi ma Water Lir XITINJ&i TAMARlK 10 ZEMOVF-IJ (THE (''7 7OTAL OTY. W/APPio$. b if &ALJI'S) SYMBOL BOTANICAL NAME COMMON NAME SIZE MIN. HT. MIN. SPREAD REMARKS DET. TREES POP FRE Populus fremontii Western Cottonwood 15 gal. 10'-12' 3'-4' Straight trunk, stake, male plants. NL-6 SAL LAS Salix lasiolepis Arroyo Willow 1 gal. 24" 18" Well rooted, multi-trunk. B/L-6 SHRUBS ATR CAN Atriplex canescens Four-wing Saltbush 1 gal. 10" 10" Full & spreading, good color B/L-6 BAC GLU Baccharis glutinosa Mulefat 1 gal. 12" 6" Upright, good color B/L-6 DIS SPI Distichlis spicata Salt Grass Liner 8" 6" Well-rooted divisions C/L-6 ENC CAL Encelia californica Coast Sunflower 1 gal. 8" 8" Full & spreading, good color B/L-6 JUN ACU Juncus acutus var. sphaerocarpus Spiny Rush 1 gal. 12" 6" Well rooted, full clumps B/L-6 SCI AME Scirpus americanus American Bulrush Liner 18" 8" Well rooted divisions C-6 TYP LAT Typha latifolia Cattails 1 gal. 18" 10" Well rooted, full clumps C/L-6 GROUNDCOVER HYDROSEED Native Hydroseed Mix No Common Name --- --- Seed See Legend Below NATIVE HYDROSEED MIX SEED LBS./ACRE I.. \ Artemisia douglasiana ( Douglas Sagewort) 2.0 Artemisia californica ( California Sagebrush) 3.0 Anemopsis californica ( Yerba Mansa) 3.0 Baccharis pilularis var. consanguinea ( Chaparral Broom) 1.0 Eschscholzia californica (California Poppy) 5.0 Festuca mealura 'Zorro' ( Fescue) 4.0 Frankenia gandifolia (Alkali Heath) 2.0 Haplopappus venutus (Coastal Goldenbush) 4.0 Heliotropium curvassavicum (Wild Heliotrope) 2.0 Heterotheca grandiflora (Telegraph Weed) 2.0 Lasthenia chrysostoma ( Dwarf Goldfields) 2.0 Lupinus succulentus (Arroyo Lupine) 6.0 Mimulus puniceus ( Red Monkeyflower) 3.0 Plantago insularis (No Common Name) 15.0 Total pounds per acre 64.0 lbs. Add to the hydroseed slurry: 2,000 LBS/AC. Cellulose Wood Fiber 160 LBS/AC. Organic Soil Stabilizer 64 LBS/AC. Seedmix Overseed the hydroseed mix with: Eriogonum fasciculatum (California Buckwheat) 10 lbs./per acre HYDROSEED NOTES 1. No hydroseed mix shall be sprayed within two feet of the lagoon water's edge. No run-off of fertilizer or hydroseed slurry shall be allowed into the lagoon. SOT B: eooe —on _. NN HT &HANLNKFENJC - ThTALL- J7 R Pr---TAI L-M-Co Or 6. Tc2 j7S. CONE-CT 1V X1ST f-4C. SHAL-L, S AL-VJIZW W1 ------ - CONTIRACIV _aIuI --- am 20 40 MATCHLINESES an am iiié A1Nt/ Graphic Scale: 1" =201 i0 RMfl R;qe P&D Technologies 401 West "A" Street, Suite 2500 San Diego, CA 92101 619•2324466 Vo. 2781 11 A BUILT" RLA EXP. DATE REVIEWED BY INSPECTOR DATE 3/27/92 L-J- 1st CITY SUBMITTAL SHEET I CITY OF CARLSBAD SHEET 2 ENGINEERING DEPARTMENT ________ PLANTING PLAN FOR: JEFFERSON STREET BIKE PATH LANDSCAPE MITIGATION PLANS APPROVED PE EXPIRES CITY ENGINEER DATE OWN BY: II CHKD BY: .tZ. II RVWD BY, II PROJECT NO. 3156 II DRAWING NO. II DATE INITIAL REVISION DESCRIPTION DATE INITIAL DATE INIllAL ENGINEER OF WORK OTHER APPROVAL CITY APPROVAL J.N. 10712.00 IRRIGATION HEAD LEGEND IRRIGATION NOTES Reference Drawings: Buena Vista Lagoon Area - Irrigation Plans for existing irrigation improvements. Carlsbad Drawing #291-03 and Project 3304. Irrigation mainline is shown diagrammatic. Install in planting areas. Install irrigation heads a minimum of three feet above water level. Contractor shall keep existing irrigation system operational during construction and shall not disrupt the programming sequence of the existing controller. End run of lateral lines shall be 1/2", unless otherwise noted. Remote control valve information shown for reference on1y on those valves with additional irrigation heads added. Locations of existing irrigation equipment is diagrammiatic only and information was gathered from the aforementioned Refference Draw- ings. Contractor shall verify the location of the existing irrigation equipment in the field. Approximate Water Line SYMBOL DESCRIPTION MANUFACTURER/MODEL REMARKS RAD GPM PSI DETAIL F 1/2 1/3 1/4 (Th SHRUB POP-UP EXISTING VERIFY IN FIELD 6" SHRUB POP-UP TORO 570C-6P W/ 15 PC SERIES NOZZLE INSTALL NOZZLE W/ PRESS. COMP. DEV. 15' 1.0 50 G/L-6 15' 1.9 50 — — — 12" POP-UP STREAM ROTOR HEAD TORO 300 SERIES W/ #63 LOW GAL. NOZZLE 30' 3.23 50 H/L-6 1 0 I, 30' 1.62 50 " to 30' 0.81 50 of of @ to - to " of 30' 1.21 50 of It STREAM ROTOR HEAD ON SHRUB RISER TORO 300 SERIES W/ #63 LOW GAL. NOZZLE INSTALL 12" ABOVE FINISH GRADE 30'. 1.62 50 l/L-6 A It 30' 0.81 50 of of IRRIGATION EQUIPMENT LEGEND SYMBOL DESCRIPTION MANUFACTURER/MODEL REMARKS DETAIL Jj WATER METER EXISTING SEE IRRIGATION NOTES CC) R/P BACKFLOW DEVICE EXISTING 2" SIZE 'I BALL VALVE EXISTING " BALL VALVE NIBCO#T-113 LINE SIZE D/L-6 REMOTE CONTROL VALVE EXISTING ,— SEE IRRIGATION NOTES REMOTE CONTROL VALVE RAINBIRD EFB-CP SERIES SIZE AS NOTED ON PLANS EJL-6 QUICK COUPLING VALVE EXISTING SEE IRRIGATION NOTES 3/4"QUICK COUPLINGVALVE RAINBIRD 33DLRC W/ KEY WITH LOCKING COVER F/L-6 AUTOMATIC CONTROLLER EXISTING RAINBIRD ISC-6 .-- SEE IRRIGATION NOTES PRESSURE REGULATOR EXISTING ,. CURRENT SETTING APPX. 70 P.S.I. NON-PRESSURIZED LATERAL LINE EXISTING VERIFY IN FIELD NON-PRESSURIZED LATERAL LINE CLASS 200 PVC-3/4"+ SIZE CLASS 315 PVC — 1/2" SIZE SIZE AS NOTED, INSTALL 12" MIN. DEPTH - MAINLINE EXISTING .—" VERIFY IN FIELD IuIlllI!IIllII MAINLINE SCH. 40 PVC PIPE SIZE AS NOTED, INSTALL 18" MIN. CONTROL WIRES LOW VOLTAGE CONNECT NEW R.C.V. TO EXIST. AUTOMATIC IRRIG. CONTROLLER INDICATES VALVE STATION —H INDICATES VALVE SIZE INDICATES VALVE GPM 'ACKFLON r'Vtn XITIN'T JA1E-P. MEr ANr-> 1I(1ATION P.O.C. NN ClIAH'JL-INK FNC (S CALLOI.AT ON sHifl ) 'P&D Technologies 401 West "A' Street, Suite 2500 San Diego, CA 92101 619-232-4466 SOT 3/27/92 2_ 1st CITY SUBMITTAL AIT YJSTI e70TM TO MAN Graphic Scale: 1" = 20' 01 4 / \ t \ ..J -...' ..' MAT 2SEESHT.4 - - Approximate Water Line / XrSTING TOM PJp )(I€'TlNG NVI04MN1AL- PSY SVN XI€iiPJCr At' ttA rz ¶RMN4K T)'P.) .XlSflN6i C-1A1N.JNK I o 20 40 60 Graphic Scale: 1"= 20' • P&D Technologies 401 West "A" Street, Suite 2500 San Diego, CA 92101 619232•4466 No. 2781 ,Dsc%\_ _ '/AS BUILT" RLA ________ EXP.__________ DATE REVIEWED BY' INSPECTOR DATE 3/27/92 RL-- 1st CITY SIUBMITAL SHEET II CITY OF CARLSBAD ENGINEERING DEPARTMENT TS H [!77 IRRIGATION PLAN FOR: JEFFERSON STREET BIKE PATH LANDSCAPE MITIGATION PLANS APPROVED PE EXPIRES CITY ENGINEER DATE LG DWN BY: ZL,Z. II PROJECT NO. IDRANc NO [RVWD BY' II INI11AL REVISION DESCRIPTION DATE INI11AL DATE INfliAL WORK OTHER APPROVAL CHKD BY: tZ 3156 .-(OF CITY APPROVAL J.N. 10712.00 [;] 1 2" DIA. X 8' LONG LODGEPOLE PINE STAKE 2 VINYL TREE TIE -2 REQUIRED (NAIL TIE TO 3 TREE TRUNK 4 ROOTBALL 5 ROOTBALL BACKFILL 6 PLANT TABLETS 7 2 X ROOTBALL DIAMETER 8 6" WATERING BERM 9 EXISTING GRADE AT SLOPE 10 NEW GRADE AFTER PLANTING 11 SCARIFY SIDES OF PLANT PIT 12 NATIVE SOIL SCARIFY 6"-10" DEPTH 1 - WATER/BOG PLANT SHORELINE PLANTING BACK-FILL (EXISTING SITE SOIL) ROOTBALL UNDISTURBED LAGOON BOTTOM WIDTH OF ROOTBALL DEPTH OF ROOTBALL 4" - 12" WATER DEPTH AVERAGE WATER LEVEL TREE PLANTING /STAKING DETAIL 1 - SHRUB ROOTBALL SET SHRUB ON UNDISTURBED GRADE 6" MINIMUM 2 x ROOTBALL DIAMETER WATERING BASIN. REMOVE AFTER MAINTENANCE PD. PLANT TABLETS (3" BELOW GRADE) SEE SPECIFICATIONS FINISH GRADE AT SLOPE (AS REQUIRED) TOP OF CURB, PLANTER OR PAVING 11 - FINISH GRADE AT EXISTING SLOPE (AS REQUIRED) 12 - PLANTING BACKFILL (SET TOP OF ROOTBALL 1" ABOVE ADJACENT GRADE) B \ SHRUB PLANTING DETAIL AQUATIC PLANTING DETAIL NO SCALE L-6) NO SCALE NO SCALE Fr' II II u-u - i (4fl !iii(I(I itiI 1 COMPACT SUBGRADE 2 QUICK COUPLER KEY W/HOSE SWIVEL 3 QUICK COUPLING VALVE (SEE SPECS). 4 FLUSH IN LAWN; 3" IN GROUNDCOVER 5 6" TO 12" MAX. FROM EDGE OF CURBS, WALKS, ETC. 6 BRASS ELL 7 12' SQ. X 12" DP. CONG FTG. ON UNDISTURBED GRADE 8 12" LONG RED BRASS NIPPLE 9 SCH 40 FEMALE ADAPTER 10 BRASS COUPLER (FLUSH W/CONC) 11 BRASS NIPPLE 12 18' MIN. TO 24" MAX. - -\ (!.r 1 REMOTE CONTROL VALVE 2 FLOW CONTROL 1 BALL VALVE D 2 PVC SCH. 80 UNION 3 P.V.C. UNION 3 FINISH GRADE .- 4 LATERAL DEPTH (SEE SPECS.) 4 VALVE BOX TI I IT lit I.:I I (i ill It (SEE SPECS.) It 6 LATERAL LINE ItT] ____ I 5 SHORT PVC SCH. 80 5 EPDXY FILLED CONNECTION 8 BRICK OR CONCRETE \ NIPPLE (TYP.) .7 3/4" SIZE GRAVEL 2 CU. FEET 6 PVC PRESSURE PIPE (SEE SPECS.) 3 2 (Ill{( __ 7 PVC SCH 40 FEMALE ADAPTER (TYP.) . "-1 SUPPORTS ON COMPACTED SOIL 8 FLUSH IN LAWN, 2" IN G.C. ____ 9 SCH. 80 RISER b iIi iit d - GRAVEL SUMP ____________ _____ (THREADED) 9 1 CU. FT. (MIN.) PEA ____ 10 VALVE BOX (SEE SPECS.) 11 2" IN G.C. AREAS 10 COMPACTED SUBGRADE 6 — 12 MAINLINE DEPTH 1" IN LAWN 11 BRICK OR CONCRETE _________ SUPPORTS ON COMPACTED (SEE SPECS.) SOIL 13 AUTO. CONTROL WIRE iiLlIitt 12 SEE SPECS. I ;=;F tin iiii 91 - . 14 . 14 LINE FITTING 15 MAINLINE D\ BALL VALVE 1"r QUICK COUPLER VALVE REMOTE CONTROL VALVE L-6) NO SCALE NO SCALE NO SCALE 1 SIPRAY HEAD IN P(OP UP POSITION 2 PlOP UP BODY 3 LATERAL LINE 4 SCHEDULE 80 P'VC NIPPLE 5 P'VC TEE OR P'VC ELL 6 SIGH 80 DOUBLE/TRI S'WING ASSEMBLY 7 1"•, 2" MAX. FROM FIIXED IMPROVEMENTS (CURBS, WALKS, ETC.) 8 SEE LEGEND 9 12" MIN. SEE SPECS. FOR DEPTH . No. 2781 * OF ~C~0~7,!V 1 - FINISH GRADE POP-UP, GEARED ROTOR 3/4" STREET ELL 3/4" TBE RISER (LENGTH AS REQUIRED) PVC TOE FITTING PVC, LATERAL LINE 1"-2" MAXIMUM FROM FIXED IMPROVEMENTS (CURBS, WALKS, ETC.) SEE SPECIFICATIONS' 1 - GEAR DRIVEN SHRUB ROTOR 2 - 3/4" TBE SCH. 80 PVC NIPPLE (LENGTH AS REQUIRED) 3 - FINISH GRADE 10 4- 3/4" PVC TxT COUPLING 1 5 - 3/4" FLEX RISER PVC TEE OR ELL (T.O.E.) PVC, LATERAL LINE ) SEE SPECIFICATIONS 10' MINIMUM FROM FIXED IMPROVEMENTS #4 RE-BAR GALV. STEEL CLAMPS (Ii!II (TWO PER HEAD) STREAM ROTOR HEAD ON SHRUB RISER G'\ SHRUB POP-UPHEAD NO SCALE POP—UP STREAM ROTOR HEAD L-6) NO SCALE L-6) NO SCALE P&D Technologies 401 West "A" Street, Suite 2500 San Diego, CA 92101 619"232"4466 REPROORAPHIS J.rL IU(L?.( SPECIAL PROVISIONS SPECIAL PROVISIONS PART 2- CONSTRUCTION MATERIALS PART 3- CONSTRUCTION METHODS PART 2 SHALL CONFORM TO PART 2 OF THE STANDARD SPECIFICATIONS FOR PART 3 SHALL CONFORM TO PART 3 OF THE STANDARD SPECIFICATIONS FOR PUBLIC WORKS CONSTRUCTION 1991'EDITION EXCEPT FOR THE FOLLOWING PUBLIC WORKS CONSTRUCTION 1991 EDITION EXCEPT FOR THE FOLLOWING CHANGES AND/OR ADDITIONS: CHANGES AND/OR ADDITIONS: SECTION 212 LANDSCAPE AND IThRIGATION MATERIALS SECTION 308 LANDSCAPE AND IRRIGATION INSTALLATION 212-1 LANDSCAPE MATERIALS 308-1 GENERAL 212-1.2 SOIL FERTILIZING AND CONDITIONING MATERIALS ADD: 308-1.1 SUBMITTALS 212-1.2.3 COMMERCIAL FERTILIZER 308-1.1.1 LANDSCAPING SUBMflrA1S ADD: Upon being awarded the prcoject, Contractor shall submit a list of soil amendments, fertilizers, plant materials, with quantitlies of each within 15 days from award of contract. Gypsum shall b a commercially processed and packaged gypsum (CaSo2H20) with minimum 80% grade containing 14% combined sulfur. 308-1.1.2 IRRIGATION SUBMITTALS Post-plant Fertilizer (commercial) shall be a combination of natural organic and Submit a list of all irrigation equipment to be used, manufacturer's brochures, maintenance inorganic granular fertilizers, free-flowing, suitable for application with approved manuals, guarantees and operating instructions. equipment, and shall contain the following minimum available percentages by weight with the following minimum available percentages by weight: 308-2 EARTHWORK AND TOPSOIL PLACEMENT Nitrogen 14% mm. 308-2.3 Topsoil Prepatration and Conditioning Phosphoric Acid 7.0% mm. Potash 3.0% mm. 308-2.3.1 DELETE 1st paragraph ADD: Topsoil shall be existing on-site top soil. C. Planting Tablets shall be commiercial grade, tightly compressed tablets with the 308-2.3.2 ADD: following available percentages by weight: a. The following soil aimendments and fertilizers shall be evenly spread on topsoil after Nitrogen 201% topsoil is scarified. Phosphoric Acid 701% Potash I Quantit\per 1,000 sq. ft. Gypsum . 200 lbs. 212-1.2.4 ORGANIC SOIL AMENDMENT NAIAD 1 oz. DELETE in entirety and ADD: 308-2.4 FINISH GRADINGS Type 1 organic soil amendment shall be a special blend of organic fractions to supply several degrees of breakdown rate which lasts up t0 10 years in the soil, a portion of inorganic ADD: Deep Water Leaching: amendment that resists further breakdown, pH of 5.5 to 6.5, salinity of 3.0, organic matter (dry weight basis) more than 90%, non-ionic wetting agent and total nitrogen content of 0.5%. a. After complette installation and testing of the Irrigation system, all areas shall be (Loamex, Wil-Gro-Life, Forest Humus or approved equal). deep water leached and compacted and settled by continuous application of irrigation water until the soil has received a minimum of six inches of water. 212-1.2.6 SOIL WETTING AGENT - . b. After leaching operation, three soil samples shall be taken by Contractor and Wetting agent shall be liquid product. (NAIAD or approved equal) Landscape Architect and given to Landscape Architect for testing. Soil test shall meet the fo11owmg .requirements: 212.1.5.3 TREE STAKES EC - Maximum 4.0 x 10.3 Delete 1st paragraph ADD: Tree stakes and ties shall be type as shown on the drawings. pile -Maximum 7.5 212-2 IRRIGATION SYSTEM MATERIALS C. Re-application of soil amendment and leaching operation shall be repeated by Contractor if tests show a negative result. Expense of test, re-application of a soil 212-2.1 PIPE AND FITTINGS amendment and leaching operation shall be borne by Contractor. DELETE 212-2.1.3 Second Paragraph ADD: 308-4.5 TREE AND SHRUB PLANTING Class 200 pipe (3/4" size and larger) and C1.3115 (1/2" pipe) shall be used for installation on the - DELETE: Fourth paragraph and ADD: discharge side of the control valves. Schedule 40 pipe shall be used for continuously pressurized pipe on the supply side of control valves. Planting Backfill shall consist of the following: 212-2.2 VALVE AND VALVE BOXES Organic Soil 25% Existing site 150i1 75% ADD: 212-2.2.2 Gate and Ball valves shall bie type as specified on drawings. Gypsum 20 lbs. per cu. yd. Naiad 1 oz. per cu. yd. 212-2.2.7 PLANTING TI'ABLETS - Planting Tablets shall be placed in each tree and shrub DELETE entire paragraph ADD: planting hole at the following rates: Valve boxes and covers shall be 91h" x 16" x 11"plastic meter boxes for remote control valves 1. 1-21 gram tablet per 1 gal. container and 8" diam. round plastic boxes for ball valv'es. . 2. 2-21 gram tablets per 5 gal. container 3. 4-21 gram tablets per-15 gal. container 212-2.4 SPRINKLER EQUIPMENT 308-4.6 PLANT STA:KING AND GUYING DELETE entire paragraph and ADD: 308-4.6.1 Method A Tree Staking - DELETE entire section. Sprinkler heads shall be as required on the drawings or approved equal. - 308-4.6.2 Method B Treee Staking - DELETE 1st sentence only. ADD: The tree shall be ADD: 212-4 EXTRA EQUIPMENT staked with tiwo - 2" diam. lodgepole pine stakes driven 24" into the ground. Contractor shall supply two (2) control valve keys and two (2) wrenches for removing each type of sprinkler head. 308-5 IRRIGATION SYSTEM INSTALLATION 308-5.3 INSTALLATION OF VALVES, VALVE BOXES, AND SPECIAL EQUIPMENT DELETE 'third and fourth paragraphs. Add: Ball valves and quick coupler valves shall be installed below ground in plastic valye boxes as shown on the drawings. 308-5.5 AUTOMATIC CONTROL SYSTEM INSTALLATION CHANGE: Third Paragraph - When the valve is to be housed in a concrete box - To: When the valve is to be housed in a plastic box. 308-6 MAINTENANCE AND PLANT ESTABLISHMENT CHANGE: The plant establishment period shall be for a period of 30 calendar days - To: The plant establishment period shall be for a period of 90 calendar days. Apply post-plant fertilizer at a rate of 20 lbs. per 1,000 sq. ft. 45 days after planting. (This application rate is for bidding purposes only; final fertilizer application amounts shall be approved by the project landscape architect and project biologist.) P&D rechmologies 401 West 'A" Street, Suite 2500 San Diego, CA 92101 619232'4466 OS C - 2781 AS BUILT RLA _______ EXP. DATE _________________________________________________ RE\'IEWED BY: INSPECTOR DATE 3/27/92 1st CITY SUBMITTAL SHEJ CITY OF CARLSBAD SHEETS] ENGINEERING DEPARTMENT SPECIFICATIONS FOR: JEFFERSON STREET BIKE PATH LANDSCAPE MITIGATION PLANS APPROVED dAPPROVAL CITY ENGINEER RCE EXP. DATE DWN BY: PROJECTNO. 'IDRAWING NO. RVWD BY: _____ 3156 IF H DATE INIllAL BY:ENNR RESION DESCRIPON DATE INITIAL DATE CHKD OF WORK OTh APPROVAL a IGER REPROGRAPHICS J.N. 10712.00