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Home My WebLink AboutSWP2702001The City of Renton Black River Water Quality Management Plan Wetland Inventory Report i Prepared by: Jones & Stokes Associates 2820 Northup Way, Suite 100 Bellevue, WA 98004 (206) 822 - 1077 September 22, 1992 WASHINGT0N STATE DE PAATMIEN T OF ECOLOGY Funded in part by the Washington State Department of Ecology is the Centennial Clean Water Fund Grant Program - Grant No. G9200030. JONES & STOKES ASSOCIATES, INC. / 2820 NORTHUP WAY, SUITE 1001 BELLEVUE, WA 98004 2061822-1077 September 22, 1992 Mr. Mike Giseburt R. W. Beck and Associates 2101 Fourth Avenue Suite 600 Seattle, WA 98121-2375 FAX 2061822-1079 SUBJECT: Task II.B - East Side Green River Watershed Plan/Black River Water Quality Management Plan - Final Wetland Inventory Report Dear Mike: Enclosed are eight (8) copies of the East Side Green River Watershed Plan/Black River Water Quality Management Plan Final Report. This report reflects comments provided on the draft report plus additional information derived on wetland resources in the study area. Please contact me if you have any questions. Sincerely, nathan H. Ives Project Manager JHI:dat Enclosures BECK[n Bucx RIVER o91ui92c The City of Renton Black River Water Quality Management Plan Wetland Inventory Report September 22, 1992 This document should be cited as: Jones & Stokes Associates, Inc. 1992. The City of Renton Black River water quality management plan wetland inventory report. September 22. (JSA 91-094-003.) Bellevue, WA. Prepared for R. W. Beck & Associates, Inc., Seattle, WA. Table of Contents Page INTRODUCTION ............................................... 1 PURPOSE..................................................... 1 METHODOLOGY .............................................. 3 Comprehensive Data Collection .................................. 3 Intermediate -Level Data Collection ............................... 4 RESULTS..................................................... 4 Wetland Functional Values ..................................... 4 Groundwater Discharge and Recharge .......................... 4 Flood Storage ............................................ 5 Shoreline Anchoring ....................................... 5 Water Purification ......................................... 5 Food Chain Support ....................................... 6 Wildlife Habitat .......................................... 6 Fishery Habitat ........................................... 6 Active Recreation, Passive Recreation, Heritage, and Education ....... 6 Wetland Descriptions .......................................... 6 Wetland3............................................... 7 Wetland4............................................... 7 Wetland5.............................................. 15 Wetland 7 North ......................................... 17 Wetland 7 South ......................................... 18 Wetland 8 North ......................................... 19 Wetland 8 South ......................................... 21 Wetland9.............................................. 21 Wetland 10............................................. 22 Wetland 11............................................. 24 Wetland 12............................................. 25 Wetland 13A............................................ 26 Wetland 13B............................................ 28 Wetland13C............................................ 29 Wetland14............................................. 30 Wetland16............................................. 30 Wetland22............................................. 31 Wetland32............................................ 32 Wetland33............................................. 33 Wetland37............................................. 33 Wetland40............................................. 35 Wetland45............................................. 35 BECKn3 BLACK RIVER 09/71/91e Page Regulatory Framework ....................................... 36 CITATIONS.................................................. 39 Printed References .......................................... 39 Personal Communications ..................................... 41 APPENDIX A - WETLAND DELINEATION DATA FORMS APPENDIX B - WETLAND FUNCTIONAL VALUES FIELD FORMS BECKn3 BUCK RNER a9iui9u ii List of Tables and Figures Page Table 1 City of Renton Wetland Inventory ........................ follows 6 2 Wetland Types as Defined by the Classification of Wetlands and Deepwater Habitats of the United States ......................... 8 3 Wetland Plant Common and Scientific Names ..................... 9 4 Hydric Soils and Soils with Hydric Inclusions within the City of Renton Study Area ........................................ 11 Figure 1 City of Renton Wetland Field Inventory Study Area ................. 2 2 Wetlands of the Black River Water Quality Management Plan ... follows 2 3 Wetlands Impacted by Proposed Alternatives for the Black River Water Quality Management Plan ......................... follows 3 sECKM suck RIVER 09/12/92a 111 INTRODUCTION The City of Renton has initiated two planning studies to provide a comprehensive examination of the Springbrook Creek and Panther Creek watershed area known as the East Side Green River Watershed or the Black River Basin. The first study, the Black River Water Quality Management Plan (BRWQMP), is intended to improve water quality within the study area and will address such environmental issues as water quality, aquatic resources, and preservation and enhancement of the valley wetlands. This study is 75% funded under the Washington Department of Ecology Centennial Clean Water Fund Program. The second study, the East Side Green River Watershed Plan (ESGRWP), will characterize the hydrology and hydraulics of the stream system, identify existing and future flooding conditions, and develop channel improvements necessary to eliminate major flooding problems. The ESGRWP study will incorporate the findings of the BRWQMP relative to water quality, wetlands, and aquatic resources to ensure that channel improvements are environmentally compatible solutions. This wetland inventory is part of the BRWQMP study. During May 1991, Jones & Stokes Associates conducted an initial inventory of the city's wetland resources as part of the overall water quality and flood management plan (Jones & Stokes Associates 1991). The inventory encompassed the entire City of Renton and an additional area in unincorporated King County termed the Renton "sphere of influence". The initial inventory was prepared based on review of existing literature and minimal field verification. The primary purpose of the initial inventory was to identify the general condition and location of wetland resources within the city limits so that a wetland management ordinance could be developed. This report presents the results of a more detailed field inventory, which builds on the initial inventory and provides more detailed wetland information within the Black River watershed study area. The study area is approximately 5,935 acres, and is shown in Figure 1. As a result of this field inventory, additional wetland areas were identified. Wetlands identified within the study area are shown in Figure 2. PURPOSE The primary purpose of the field inventory was to verify wetlands mapped during the initial wetland inventory (Jones & Stokes Associates 1991), to add wetlands not previously identified, and to expand on the knowledge of functional values of the wetlands. Information will be used to assist the city in the management and protection of these wetland resources. The information will also be used to define impacts associated with flood control alternatives defined as part of the ESGRWP. BECKM BLACK RIVER 1 09/22/92e Figure 1. City of Renton Wetland Field Inventory Study Area ❑ECKM BLACK RIVER 09/12/92c Management METHODOLOGY For the purpose of this study, the federal definition of wetlands was used to determine whether an area was a wetland. This definition includes "those areas that are saturated or inundated at a frequency and duration sufficient to support, and that under normal circumstances typically do support, vegetation adapted to life in saturated soil conditions." The following information sources were used to conduct the wetland field inventory: • Critical Areas Inventory - City of Renton Wetlands and Stream Corridors and accompanying AutoCAD base maps of the city (1"=1,000') and sphere of influence (1"=2,000') (Jones & Stokes Associates 1991); • 1990 true color aerial photographs (1" = 1,000') of the City of Renton; • wetland reports prepared for various properties within Renton (see Citations); • U.S. Soil Conservation Service 1973 Soil Survey of the King County Area, Washington (U.S. Soil Conservation Service 1973); • Washington Hydric Soils List (U.S. Soil Conservation Service 1990); • King County Sensitive Areas Map Folio 1990 (King County 1990); • City of Renton wetlands study (City of Renton 1981); and • National Wetland Inventory (NWI) maps - Mercer Island and Renton Quadrangles. In addition to review of these materials, each wetland was visited in November and December 1991 to assess current conditions and functional values. The Critical Areas Inventory map was updated based on information collected. Wetland boundaries were not delineated, but approximate boundaries were defined based on any existing wetland reports and interpretation of aerial photographs. A two -tiered data collection approach was used during the field investigation. The approach is described in the following paragraphs. Comprehensive Data Collection A comprehensive approach was used for those areas that might be impacted from any of the proposed alternatives in the ESGRWP. In these areas, wetlands were visited and data sheets (Appendix A) containing a list of dominant vegetation, soil descriptions, and obvious indicators of wetland hydrology were completed. Figure 3 represents wetlands BECKrr3 BLACK RIVER o9i22i9u 3 within the study area that would be impacted by the alternatives. In addition, a wetland assessment form (Appendix B) was developed to assess functional values of each wetland. This form was completed for each wetland and a description of each wetland was prepared. Intermediate -Level Data Collection Information collected for wetlands located outside the area of impact described above was less detailed. The presence of each wetland was verified, and hydrologic connections and dominant plant species were noted. This information was also added to the summary table of wetlands. This level of analysis did not include completion of data sheets or descriptions of wetlands. Data sheets describing conditions and functional values were not completed and wetland paragraphs were not written for this level of analysis. RESULTS The study area contains 38 wetlands located during this inventory. The majority of the wetlands are located in the Green River Valley adjacent to Springbrook Creek. This section presents a general discussion of wetland functional values within the study area and a description of each wetland surveyed using the comprehensive methodology. Wetland Functional Values Wetlands within the study area provide a variety of functional values, dependent on a number of factors including, but not limited to, size, location of the wetland in the watershed, the type and amount of vegetation, and the proximity of the wetland to stream corridors. If a wetland will be impacted, it is necessary to assess in detail its existing functional values so that if mitigation is proposed, the field values in the replaced wetland can be duplicated. The Federal Highway Administration Wetland Functional Assessment Method (Adamus 1983) recognizes 11 wetland functions. Many of the functions are difficult to quantify or qualify without extensive research (Erwin 1990). The following is a general discussion of the 11 wetland functions and values. Groundwater Discharge and Recharge The groundwater discharge function of a wetland helps to maintain a high water table in wetlands and contributes water necessary to maintain streams during dry months. Groundwater recharge can replenish groundwater supplies to the underlying aquifers. It is difficult, however, to predict recharge and discharge from the physiographic setting of the wetland; usually more detailed hydrogeological studies are necessary. Certain wetlands BECKM BUCK RIVER Ig/u/92c 4 Figure 3: Wetlands Impacted by Proposed Alternatives for the Black River Water Quality Management Plan 9/17/92 contribute significantly to recharging regional groundwater. The majority of hydrologists believe, however, that most wetlands in areas where glaciation has occurred (such as the Northwest) do not recharge aquifers (Erwin 1990). Wetlands may, however, recharge shallow or perched lenses of groundwater which in turn discharge to streams. Many of the wetlands along Springbrook Creek act both as recharge and discharge sites, depending on the season. During high water periods, the wetlands store overbank flows and act to recharge local groundwater. During low flow periods, the wetlands act as discharge sites, helping to maintain streamflow in Springbrook and Panther Creeks. Flood Storage Wetlands can reduce storm runoff peaks by storing and then slowly releasing stormwater. Such attenuation of floodflows results in lower peak rates of runoff occurring for longer durations. The flood storage value of a wetland varies with factors such as size, topography, location within the watershed, soils, surrounding land uses, association with other aquatic systems, and the type and amount of vegetation present. Shoreline Anchoring Wetland vegetation binds shoreline and streambank sediments with root systems, thereby anchoring the substrate. Additionally, aboveground vegetation reduces velocities and turbulence during overland flows, which results in reduced erosive power. Water Purification Wetlands can purify water through a variety of mechanisms. The low current velocities in wetlands cause sediments, metals, and certain chemicals to be deposited; once in the wetlands, mechanical, chemical, and biological processes can remove certain pollutants from the water column. The ability of a wetland to perform this function is based on a number of factors, such as residence time of the water in the wetland and the type and density of vegetation. Wetlands that are densely vegetated with emergent plants have the ability to trap sediments and take up pollutants in the water. Biofiltration is particularly important when a wetland discharges into a watercourse. This function is also highly dependent on the relationship of the wetland to surrounding water bodies. Wetlands which receive significant quantities of pollutant laden water either through stormwater input or overbank floodflows posses a high potential for water purification. A more detailed assessment of this function, as well as groundwater discharge/ recharge and flood storage, will be possible following completion of hydrologic modeling BECKM BLACK RIVER 09/22/92C 5 being conducted as part of the ESGRWP. The modeling will evaluate the depth, frequency, and duration of wetland inundation associated with Springbrook Creek flooding. Food Chain Support Wetlands can be highly productive ecosystems that are used by numerous species for nesting, spawning, rearing, and feeding. Primary productivity is usually high in wetlands, and is generally highest in emergent wetlands that contain water year round because they support fast-growing plant species. Wetlands trap and store nutrients, thereby providing a constant source of nutrients for release over time. This creates conditions that support intricate food chains, high species diversity, and long complex life cycles. These conditions are predominant in mature wetlands (Erwin 1990). Wildlife Habitat Many bird, mammal, amphibian, and reptile species are dependent upon wetlands for all or part of their life cycles. The wildlife habitat value of a wetland depends in part on the structural and species diversity of plant communities, the proximity of desirable upland habitat, and surrounding land uses. Fishery Habitat Some wetlands are important sources of food and habitat for fish species. In many urban streams, fish use is limited due to degraded water quality and inconsistent flows. Active Recreation, Passive Recreation, Heritage, and Education Wetlands can provide valuable opportunities for recreation and education, such as bird watching or natural system studies. Wetland Descriptions Twenty-five of the 38 wetlands within the study area were surveyed using the comprehensive approach. Descriptions of vegetation, soils, hydrology, and functional values are included for each wetland. Wetland numbers referred to in this section are based on the numbering system for the initial wetland inventory. Because this field inventory covers less area than the initial inventory, the wetland numbers in this report and Table 1 are not sequential. For example, Wetlands 1 and 2 are outside of the study area, so the first wetland described herein is Wetland 3. A summary of information about wetlands within BECKM BUCK RIVER 09iui9k 6 Table 1. City of Renton Wetlands Inventory Mapled az Permanent Ref- I —ion Wetland Approa. Dominant 1lyonc .oils or F-l-- IlydroWgsc Outkd No. So— Name Cr, R. S) Subbas. Type, A— Speoerb (S(1) Seasonal Patcm Connectx)m 'type Co n-c—' D et—ated (atcg,ory W-3 City of Renton 81 Orin- Pond 73N 4E 36 Valley POW, PFO, PFTd 6 P(XM SASPP, OFSA, AIRU. PRAR. RIISPP yes --)—I ulen water none — apparent possible Sul —fund site 2 W4 City of Renton 81 Panther Creek 23N SE 19, 30. Pamper Creek PFO, PSS, PEN4 65 P(YLR, SASPP, AIRU, PILAR TYLA yes permanent mmpkx and altered Panther C-reck multiple cuherta to subaantuilly rerouted flew, diverse habitat; thud ho I R W. Bede W 31 wlky area pigpen ranked wetland in sty W-5 City of Renton 81 Blade River r4.—. 23N 4E 13 Iwer Empire PFO 20 P'OTR, FRIA- AC:MA, SASPP yes ecamnal ecamnally flooded P-1 Pond, seasonally Mxxkd F—d high value olen space; highest ranked wetland in cry portons 1 by 81 tn-nl.ry; aorta pans of this area arc upland W-Sot City of Renton 91 Black— Trail A 23N 4E 13 Ewer F-pim PSS 0.1 JUSPP, SASPP no; hydrae sensorial isolated none hone disurbed sac; In to reed and mitigated yes 3 inclusions W-5b City of Renton 91 Blackmer Traa B 23N 4E 13 lower Empire PSS, PET.4 1.14 SASPP, AIRU, RUSP, POSPP, TYLA, SCMI, nu; hydrae scaronial runoff- nodding P-1 Pout F—d remnant of old Blads R- channel yes 3 PILAF, JUEF Indusions W-5e 1SA 90. Bladerner Tray C 23N 4E 13 Ewer Empire PLO, PSS 23 POTR. SASPP yes fare t ground -We, P-1 Pond P-1 Pond to P-1 Pond ekarcut in 1997; partially filk-d yes 2 W-6 Field Survey 91 I6th Street 23N 4F 24 Valley PFO, PSS 3 POTR, SASPP no scar nal unkrxrwn grouncwater unknown DIA has surveyed site; north of Group Ficalth 3 W-7N Ciry of Renton 81 F&r, Valley B 23N 5E 19 Valley PF7.4, PSS 12 TYIA, SASPP, AIRU, SPDO yes perrnanem —latcd hone hone very high drversiry and structure; good quality ho 2 IFS 90 wdlard W-7S City of Revlon 81 Fan Valley B 23N 5E 19 Valky PSS, PDA 3 SASPP, SPDO, TYLA, PLIAR, IRPS yes uastonal tvolatcd none none this we -Hand consists of rwo dashes n.o 3 IFS 90 W -Rh' City of Renton 81 East Valley C 23N SE 30 Valley PS'S, PEM 11 FRIA, COST, SASPP, P(7IR, TYLA, IILS yes p—riem flew through Spnngbro ok Creek culverts good si—iorel drversiry and vinery of wetland types; yes 2 Ritedcke 91a, b and ---I eight wcilands, seven on top of fill W-)rS Gry of Renton 81 Fan Valley C 23N SE 30 Valley PFT4 5 JI11F, ETPA yes seasonal ruolaled none hone small wetlands devcloled on fill yes 3 Racdeke 91a W-9 City of Renton 81 Fan Valley D 23N 5E 19 Valley PPO 2 POTR, AIRU, ACCI, SASPP, COST yes permanent ❑iw through Springbrtxok Creek drainage ditch majority of wetland has been filled; remnant on west y— 3 ISA 90b side of property W-10 City of Renton 81 East Valky E 23N SE 30 Valley PFO. POW 13 SASPP, COST, POTR yes lermanent fkw through Spnngth—k Creek drainage ditch one of the highest quality wetlands in the e-iry 2 W-1I City of Renton 81 Fan Valley F 23N 5E 30 Valky PDA, PSS 28 PRAR, TYLA, SASPP, JUEF ycs permanent seasonally noodcd Spongbrook Creek none good habitat drversiry, crags ho 2 W-12 City of Renton 81 Remora Wetland 23N 4E 25 Valley PSS, PEM 41 PFFAR TYLA, SASPP. JUSPP, SPOO yes permanent flow through Spnngbrook Creek drainage ditch signifimnt open water area and hoghest ranked ho 1 wetland in my W-13a M—ng 91 Lcmgpc� 23N 4E 24 Vapky PFIO, PEM, PSS 42 POTTE, SASPP. SPDO, PIIAR no permanent fkw through adlaoent to Springbrook Crock arcam Corps vcnftotton 91 ye, 3 L C. Inc 91a- b Spnngtonxok W-13b Shapiro and Assoc. 92 Long— main 73N 4E 24 Valley PIM 202 POPP, POAPA, SCAC, JUFF, PIMA. COCO. yes seasonal altered adpaoenc to Spongbrook Cheek c„lert Corps ve fica( o 91 yes 3 racetrack AG11?, RARE, UYA, POAS W-131 Shapiro and Assoc 92 Llonga—cs south 23N 4E 24 Valley POW, PEM, PSS IIA SASPP, SPDO, TYIA, PHAR yes permanent altered adjacent to Springbrook Creek unknown Corps-ofomtion 91 yes 2 marsh and seasonal W-14 D- Pvaos R Assoc 109%, Saftk• Times site 23N 4E 25: Valley PSS, PEM 3A7 JUFF. AGSPP, POrM SASPP yes seasonal -Wed isolated none disturbed; most of site filled and de-e Weed; wetlands yes 3 b. 91d 23N 5E 30 on Coll W-15 Earth Consultants 90 Rivertech 23N 4E 13 lower Empire; PFO, PSS 3 POTR, FRIA. SASPP, COST, SPDO yes permanent unknown to P-1 Pond cohort to P-1 Pond assYx ated wuh BU k River npanan and P-1 Pond yes 3 South Renton area W-16 IES/Scaks 90 AIIPAC site 23N 4E 25 Valley PEM, PSS 2 POTR, PRAR, SASPP, TYLA yes seasonal —[.led isolated hoot dui art" stte yes 3 W-21 Shapiro R Assoc 79 Container Corp. site 23N 4E 24 Lo Empire PFM, PSS 4.7 SASPP, unidentified granietc yes permanent flow through Blade River unknown dtaurted building adjacent; wetland as—ated with yea 3 cream, Buck River W-22 NWI 73 Renton I14 Parcel 23N 4E 25 V&B y PEM. PSS, PFO 1&78 PF1AR, SASPP, PYE1J. COST, SPCO, POTR yes unknown cream flow through altered ditch relic area. channel onsite; fill adivitica have altered yes 2 Aerial Photos 90 hydrology of wetland D-Evans & Assoc 91a Field Survey 91 W-25 Aerial Photos 90 — 24N 5E 36 lower Empire PFO I AIRU, RUSP no; hydros permanent cream flow through Springbrode unkrsown small wetland ass led with tribunary to no 2 Field Survey 91 tndusions doeb Spnngbr ok Creek, fenced area in Renton watershed WJl Aerial Photos 90 Puget We Lrtnd 23N SE 19, 20 Rolling Ifilk PFO, PEM 1 SASPP, TYLA ho permanent fWw through stream area. south of Puget Power property no 3 W-32 Aerial Photos 90 — 23N 4E 30 Valley PFO,PSS 6S POTR, SASPP. JUEF, AISPP, AGSPP, yes seasonal isolated isolated tsotse wetlands on fill ho 3 Field Survey 91 I I I I I I .,..eke tificd p-aoes BECK(M BLACK RIVER 09/22/92e Table 1. Continued Rcf. Flapped as Permanent No. Source Nan' lmt�n (T. R S) Weilud Appmx- Dominant Ilydne Soils or 11— 1lydmktg" Outk! Sut><rasln Typ" A— Specie: (SCS) Seasonal F'aticrn (-<Innn-tulns Type Comments' Dchncwl ,j t alekllly W-33 A photomi Field Survey 910 23S SE 30, 31 Valley PI-34, PSS 4 AGSPP, unckntifkd grauca, POTR yes uaxrnal u. L—d raw A-0 'sine un fill: oven small ivolatcd array tx i D. I?vanr & A-- 91b W-34 Aerial Photon 90 Field Survey 91 Talbot Read 23N SF-: 30 P.ntbcr Creek PE7.4 1 M'A no; hyAlx Tx rnranent f4.v through stream stream wetlandwa at headwaters of ''hall ozcelk at T)b ad Road rut 1 Inclusions So ui h W-35 Acrid Photos 90 Field Remo 91 -- 23N SE 30 Panther Crock PE M 1 JUEF no; hydro --,—I -Arced —)iatttl no dcpressinn; receives -wff froth road and adjacent al 3 irui unions houses W-36 KCSA -- 73N SE 29 Panther Creek PEAL 1.7 JUEF no; hydro Inclusions ttasonal isolated Isolated no— disturbed pasture n> 3 W-37 KCSA Panther I a4^ 22N SE 5,4 Panther Creek POW, PSS, PEA/ 62.6 A1RU, SASPP, CASPP, RARE JULF, VFAM, yes permanent flew thmugh Panther Creek et ream wetland rated 2 by KCSA ran 2 VASPP W-39 JSA '89 - 22N 4E 25, 26 V alley PPO, PSS, PF7.1 SA 1 SASPP, SPDO, , TYIA, ATSPP no uamnal isolated isolated home same as Wetland 12, Tukwila Inventory rxl 2 W-40 Field Remo 91 D. Evans - 23N 5E 30 Val Pf7r1, PSS <1 JUFF yes uausnal mtlal col Iu>latn] none pockets of standing water on GU no 2 & Assoc. 91c WAI Watershed Dy—ni— 91 - 23N 3, 4E 24. Valley PSS, PF7s1 2S SASPP, RUSP, COST, JUE}, MAR no —so nal aoWcd wllatcd now Includes north portion of Wetland 38 yes 3 25 W-72 1SA '}il - 23N 4f: 24 Valley POW, P17.1, PSS 1 P(yER, SASPP, 7Y1 A, JUEF a I; hyd nc lrcrman<nt mrlated —Wed Done Inaintalned pond in Fort Dent Park; same as run 3 Indusurn Weiland 8, Tukwila Inventory W-43 D.Lvans & Assoc 91f Renton 46 Parcel 23N SE 30 Valley PF7v1 022 ALIT ALG R FiYRA, IUEF, PI JAR, A1CA, no uawnal isolated 'sine none soils arc fill [tu[erial' previously ditched. but ditches yes 2 TRRE:, ROLA do not drain out of wetland area W44 D.Evans & Ass 91g Renton #S Parcel 73N SE 30 Valky Pam• PSS IX PRA ALG R R TYIA, SAIA, Print. RUDI no uasonal ssolatcd none Done coils arc fill matcril; previously ditched yes 3 W45 Field Survey 91 - 23N 4E 25 Valley PFO, PSS, PPh1 18 POTR, SASPP, ALRU, SPOG, PIIAR, JUEF, yes seaxrnal fllw thmugh Wet larch ?? and 3 large wetland area; gaxf habitat nI 2 TVEw, BOLA Refer to Appendix A for definition of wetland rypes, . b Refer to Table 3 for definition of species acronyms - State and federal threatened species - bald eagle. ' Re(cm to wetland delineation conducted and wetland rel,r, revk_d- RECKjf'3 RUCK RIVLR 09/22192e the study area is presented in Table 1. Wetland classification codes are shown in Table 2. Common and scientific names for plant species are shown in Table 3; Table 4 presents information about soils mapped within the study area. Wetland 3 Wetland 3, Orillia Pond, would be classified by the U.S. Fish and Wildlife Service (Cowardin et al. 1979) as a palustrine forest, emergent, and open water system. The wetland is located east of the Burlington Northern railroad tracks and north of Southwest 43rd Street. This site is being tested by Seacor Environmental Engineering for high levels of toxins resulting from automobile debris located in the wetland (Seacor Environmental Engineering 1991). At this time, tests have not been completed. There is some possibility that the site could be designated as a Superfund cleanup site. Vegetation. Dominant vegetation within the forested portion of the wetland includes black cottonwood, willow, and red alder. Salmonberry is dominant within the shrub layer. The emergent portion of the wetland is dominated by reed canarygrass. Soils. Soils in this wetland have been mapped by U.S. Soil Conservation Service as Puget silty clay loam and Woodinville silt loam, both of which are hydric soils (Table 4). Soils were not sampled in this wetland due to the concerns regarding health risks due to contamination. Hydrology. The wetland is not connected to Springbrook Creek through surface water. The wetland receives water from runoff from adjacent development. Functional Values. Functional values within this wetland are minimal due to the high metal content in the soils and the small size of the wetland. The forested portion of the wetland does provide some habitat for small mammals and birds. Wetland 4 Wetland 4, the Panther Creek Wetland, would be classified as a palustrine scrub - shrub, emergent, and forest system. The wetland, which is approximately 65 acres, is the largest wetland in the study area. The wetland is a topographically level area situated between the east side of the Valley Freeway (SR 167) and the base of the Talbot Hills Plateau slope. The following description is based on reports by R. W. Beck and Associates (1989), the City of Renton Wetland Study (1981), and the Jones & Stokes Associates field investigation. The north half of the wetland supports a dense scrub -shrub community that is a remnant of original valley floor wetlands. This area has never been cleared or drained for agricultural purposes (R. W. Beck and Associates 1989). The southern part of the wetland BECKM BLACK RfVM o9/n/9k 7 Table 2. Wetland Types as Defined by the Classification of Wetlands and Deepwater Habitats of the United States Wetland Type Definition POW Palustrine open water PSS Palustrine scrub -shrub PEM Palustrine emergent PFO Palustrine forested Source: Cowardin et al. 1979. BECK/73 BLACK RIVM 09/72/92e I Table 3. Wetland Plant Common and Scientific Names Code Common Name Scientific Name ACMA big -leaf maple Acer macrophyllum AGSPP bentgrass Agrostis spp. ALRU red alder Alnus rubra ALSPP foxtail Alopecurus spp. AGSPP water fern Azolla spp. CASPP sedge Carer spp. CAOB slough sedge Carer obnupta COCO brass buttons Cotula coronopifolia COST red -osier dogwood Comus stolonifera DAGL orchard grass Dactylis glomerata ELPA common spike-rush Eleocharis palustris EPWA Watson's willow -herb Epilobium watsonii EQAR common horsetail Equisetum arvense FRLA Oregon ash Frazinus latifolia GLEL mannagrass Glyeeria elata HOLA velvetgrass Holcus lanatus IRPS yellow flag Iris pseudacorus JUEF soft rush luncus effusus JUEN dagger -leaf rush 1uncLus ensifolius JUSPP rushes luncus spp. OESA water parsley Oenanthe sarmentosa PHAR reed canarygrass Phalaris arundinacea PLMA common plantain Plantago major POAPA fowl bluegrass Poa palustris POHY smartweed Polygonum hydropiper POPA Pacific silverweed Potentilla pacifrca POPR Kentucky bluegrass Poa pratensis POSPP smartweed Polygonum spp. POTR black cottonwood Populus Uichocarpa PYFU western crabapple Pyrus fusca BECK/73 BLACK R[VER 09/22/92e G Table 3. Continued Code Common Name Scientific Name RARE creeping buttercup Ranunculus repens RUDI Himalayan blackberry Rubus discolor RUSP salmonberry Rubus spectabilis RUSPP blackberry Rubus spp. SARA red elderberry Sambucus racemosa SASPP willow Salir spp. SCAC hardstem bulrush Scirpus acutus SCMI small -fruited bulrush Scirpus microcarpus SODU bittersweet nightshade Solanum dulcamera SPDO Douglas' spires Spiraea douglasii TRRE white clover Trifolium repens TYLA common cattail Typha latifolia VASPP huckleberry Vaccinium spp. VEAM American brooklime Veronica americana VESC marsh speedwell Veronica scutellata BECK/D BUCK RIVER 09/Z2/92c 10 Table 4. Hydric Soils and Soils with Hydric Inclusions within the City of Renton Study Area Symbol Soil Name Description Hydric Inclusions AgB Alderwood moderately well drained to poorly drained No Yes gravelly sandy soil on nearly level or undulating loam, 0 to 6% topography; runoff is slow slopes AgC Alderwood moderately well drained soil on upland No Yes gravelly sandy glacial deposits; permeability is moderately loam, 6-15% rapid to the substratum and very slow slopes through it; runoff is slow to medium BeC Beausite gravelly well -drained soil underlain by sandstone No Yes sandy loam, 6 to found on rolling slopes; permeability is 15% slopes moderately rapid; runoff is medium BeD Beausite gravelly well -drained soil that formed in glacial No Yes sandy loam, 15 deposits; runoff is rapid to 30% slopes No Norma sandy poorly drained soil that formed in alluvium Yes N/A loam on glaciated uplands and along stream bottoms; permeability is moderately rapid; runoff is slow; the seasonal water table is at or near the surface Pu Puget silty clay poorly drained soil that formed in alluvium Yes N/A loam in small depressions of the river valley, permeability is slow; runoff is slow to ponded; the seasonal high water table is at or near the surface Os Oridia silt loam somewhat poorly drained soil that formed Yes N/A in alluvium in river valleys; permeability is moderate to moderately slow in the subsoil; the seasonal water table is at a depth of 1 to 2 feet Py Puyallup fine well -drained soil that formed in alluvium; No Yes sandy loam found in natural levees and valley bottoms; permeability is moderately rapid; runoff is slow Rh Riverwash long, narrow areas of sand, gravel, and Yes N/A stones along channels of the larger streams Sk Seattle muck very poorly drained organic soil in Yes N/A depressions and valleys on the glacial till plain; permeability is moderate; runoff is ponded; the seasonal high water table is at or near the surface BECK/D BLACK RIVER 09/22/92c 11 Table 4. Continued Symbol Soil Name Description Hydric Inclusions So Snohomish silt poorly drained soil that formed in alluvium Yes N/A loam in stream valleys; permeability is moderate in the upper part of the profile and moderately rapid in the lower part; runoff is slow; the seasonal high water table is at or near the surface Tu Tukwila muck very poorly drained organic soil that Yes N/A formed in wet basins of upland depressions and on stream bottoms; permeability is moderate; runoff is ponded; the seasonal high water table is at or near the surface Wo Woodinville silt poorly drained soil that formed in alluvium Yes N/A loam and stream bottoms; permeability is moderately slow; runoff is slow; the seasonal high water table is at or near the surface Note: N/A = not applicable Source: U.S. Soil Conservation Service 1973. BECK/n BLACK RIVER 09/22/92e 12 supports an emergent wetland. The Panther Creek Channel enters the south end of the wetland. A palustrine forested wetland is present along the channel. The wetland is bisected by several utility easements, including Seattle and Renton water lines, Metro sewer trunk, Olympic Oil Pipeline, and a powerline corridor. Vegetation. The scrub -shrub portion of the wetland is a mosaic of shrubs, emergent vegetation, and standing water. The shrub layer is dominated by willow, red alder, Douglas' spirea, and red -osier dogwood. Common cattail and yellow flag interspersed with open water comprise the herb layer. The emergent portion of the wetland consists of large stands of common cattail and reed canarygrass. Rushes and smartweed occur occasionally within this community. The forested portion of the wetland is dominated by black cottonwood, willow, and red alder. Soil. Soils in this wetland have been mapped by the U.S. Soil Conservation Service as Seattle muck and Puget silty clay loam, both hydric soils (U.S. Soil Conservation Service 1990) (Table 4). Hydrology. Although the Panther Creek Wetland receives water from many sources, the two primary sources are Panther Creek and Rolling Hills Drainage. Panther Creek originates at Panther Lake and flows generally northwest. The Panther Creek Channel has been partially rerouted west under SR 167 via two culverts at the extreme south end of the wetland and into the street storm system on East Valley Road. A small portion of this surface drainage flows north into the emergent area of the wetland. The northern portion of the wetland receives surface water runoff through 48-inch and 132-inch culverts under I-405 that originate from the Rolling Hills Drainage (Giseburt pers. comm.). In addition, Talbot Hills Drainage, seeps, and small surface and storm drains along the eastern slope of the wetland supply water to the wetland (R. W. Beck and Associates 1989). Two utility dikes separate the wetland into three isolated cells, which have surface water connections during high water periods. Surface water connections are common during heavy winter rains. Approximately 10 culverts extend under SR 167, that were designed to drain surface water from the wetland to the east side of SR 167. Some of these culverts are currently overgrown with vegetation, and could not be located during field surveys. The culverts are most likely plugged with sediment and it has not been determined whether or not the culverts provide surface water drainage (Straka pers. comm., R. W. Beck and Associates 1989). According to a previous report (R. W. Beck and Associates 1989) water from Panther wetland drains west to Springbrook Creek via four different routes. Not all of these routes were visible during the field visit. These routes include an open ditch along the west side of SR 167; a storm drainage system under local roads; drainage ditches bordering the north side of Wetlands 8 and 9; and a 3-foot by 4-foot box culvert that feeds directly into the storm drainage system west of SR 167. At the time of the site visit, approximately 2 feet BECKM BLACK RIVER 13 09/22/92c of water was observed in the open ditch along the west side of SR 167; however, inlet or outlets could not be located. In addition, water was observed in the drainage ditch north of Wetland 8. Functional Values. Wetland 4 is one of the most significant wetland systems in the study area and provides excellent functional values. Due to the site, diversity, and topographic setting of this wetland it provides high biologic and hydrologic functions. Flood storage is rated very high due to the large size and the depressional topography. This wetland is one of four wetlands within the study area that received a very high rating for this function. Shoreline anchoring is only applicable where Panther Creek enters the south end of the wetland. The canopy cover in the forested portion provides good shoreline anchoring. Trees and shrubs dissipate the erosive forces near the alluvial fan during a flood event. The sediment trapping abilities are excellent due to the presence of the extensive and densely vegetated emergent community. Common cattails and reed canarygrass provide biofiltration of heavy metals from water (Kulzer 1990). This is very important because this wetland receives runoff from basins which are heavily urbanized. In addition, this function is critical for maintaining water quality in adjacent wetlands (Wetlands 8 and 9) and Springbrook Creek as runoff increases from roads and adjacent developments. The presence of standing water and an extensive community of fast growing emergent species provides for high primary productivity and food chain support. Since the wetland is very large and diverse, opportunities for wildlife use are abundant. Forested areas provide nesting habitat for ground, shrub, and tree nesting birds. Shrub and herbaceous layers provide good cover to small mammals, invertebrates and amphibians. It is highly unlikely that this wetland supports fish at this time. Panther Creek empties approximately 4 feet above the stream grade at the Talbot Road crossing and forms a barrier to fish migrating upstream. Fish habitat in Panther Creek is limited for several reasons including low summertime flow, migration barriers, and conveyance pipes between Springbrook Creek and the Panther Creek Wetland. In addition, a fishery survey conducted by R. W. Beck and Associates in 1989 yielded only several fish. These fish were thought to originate from Panther Lake (Jones & Stokes Associates 1991). However, this wetland does serve to improve water quality to Springbrook Creek, which does support fish. Runoff to the creek would have an effect on fisheries habitat. BECK/19 BUCK RIVER 09/22/92c 14 Active/passive recreation potential such as bird watching is very good in this wetland. However, this function is decreased because there is no public access to the wetland. Steep slopes border the east side of the wetland and SR 167 borders the west side of the wetland. Wetland 5 Wetland 5 (includes 5a, 5b, and 5c) is a palustrine forest, scrub -shrub, and emergent wetland that is located within the historic Black River channel. The majority of the wetland supports a forested and scrub -shrub community (5b and 5c). The southern portion of the wetland area supports primarily an emergent community (5a and 5b). The portion of this wetland that is designated 5a includes two small isolated wetlands that have developed in depressions atop fill. This wetland will be described and discussed separately. Wetlands 5, 5b, and 5c will be discussed collectively. Wetland 5a. Wetland 5a includes two wetland areas: palustrine scrub -shrub and palustrine emergent wetlands that occur as enclosed depressions located on Tract A (Figure 2). Tract A has been graded and filled and is primarily vegetated with upland grasses. The wetland area is bounded by Oakesdale Avenue Southwest to the south, Springbrook Creek to the east, the King County pump station to the west, and the P-1 Pond to the north. The following description is based on a previous wetland report (Jones & Stokes Associates 1990a) and the Jones & Stokes Associates field investigation. Vegetation. Scrub -shrub wetland is dominated by willow saplings; red alder saplings and red -osier dogwood occasionally appear. Underneath the shrub community is an herbaceous layer that consists of soft rush, orchard grass, and reed canarygrass. The emergent wetland lacks vegetative diversity; soft rush is the dominant herbaceous species within the emergent wetland. Soils. Soils on Tract A have been mapped by the U.S. Soil Conservation Service as Puyallup fine sandy loam. Puyallup fine sandy loam is described as a soil formed in alluvium, typically found in valley bottoms, and is not listed as hydric by the U.S. Soil Conservation Service. Soils in this wetland were observed to be low chroma silty fine sands with mottles. As previously stated, this site has been graded and filled. The soils observed are compacted fill material. Hydrology. The primary source of water is precipitation which does not percolate through the compacted soils. Standing water was observed within the wetland. Functional Values. Functional values within this wetland are minimal due to the small size, isolated nature, lack of structural or species diversity, and disturbed nature. Wetlands 5, 5b, and 5c. Wetlands 5, 5b, and 5c are located on land south of the railroad tracks, Tract B, and Tract C within the historic Black River channel. The wetland area is bounded by Springbrook Creek and the P-1 Pond to the west, Naches Avenue BECKM BLACK RIVFR 15 09/72/9ze Southwest and office complex to the east, railroad tracks to the north, and Southwest Seventh Street to the south. This wetland was described by the City of Renton (1981) as the most valuable wetland within the city. The following description is based on previous wetland reports (City of Renton 1981, 1991; Jones & Stokes Associates 1990a) and the Jones & Stokes Associates field investigation. Vegetation. The forested portion of the wetland consists of black cottonwood, red alder, Oregon ash, and big leaf maple in the canopy layer. Willow is the dominant species within the shrub layer of the forested wetland. The scrub -shrub portion of the wetland is comprised of red alder, willow, and salmonberry: red elderberry, Oregon ash, and red -osier dogwood occur occasionally. Vegetation within the emergent portion of the wetland includes smartweed, common cattail, Watson's willow -herb, small fruited bulrush, reed canarygrass, and soft rush. Soil. Soils in this wetland have been mapped by the U.S. Soil Conservation Service as Woodinville silt loam which is a hydric soil (U.S. Soil Conservation Service 1990) (Table 4). This wetland is located in a depression at an elevation approximately 15 feet below the surrounding upland fill areas. Soils within the wetland were observed to be black mucks to a depth of 3 feet. Hydrology. A 4- to 5-foot-diameter concrete culvert placed in an approximately 50-foot-wide berm divides the wetland into northern and southern portions. The culvert invert elevation is higher than the wetland elevation; water flowing through the culvert is most likely during high storm events. The primary source of water within this wetland is high groundwater levels, and back flooding from the P-1 Pond. Water flows north from this wetland to a small channel which connects to the P-1 storage pond. Functional Values. Functional values within this wetland are significant because of the connection of this wetland with the P-1 Pond and Springbrook Creek. Because this wetland is fed primarily by groundwater, the connection with the P-1 Pond is an important discharge site. Limited regional groundwater recharge occurs during high storm events. This wetland has been rated high for flood storage due to the large size and the depressional topography. This primarily takes place within the northern portion of the wetland which is connected to the P-1 Pond. The southern portion of the wetland is only connected during high storm events. Sediment trapping capabilities of the wetland are rated medium. Although the wetland is large, emergent vegetation is not as dense as other wetlands of this size. However, this function directly benefits water quality in Springbrook Creek. Food chain support has been rated medium. Although the wetland is not densely vegetated with emergent vegetation, the presence of year-round water in portions of the wetland increases the rating of this function from low to medium. BECKM BLACK RIVER 1 / a9/n/92e b This wetland is one of the highest rated wetlands for wildlife habitat. Dense shrub vegetation surrounds this wetland, offering protection from human intrusion. Passerine and prey species utilize the dense vegetation within the wetland as cover, nesting, and feeding habitat. Great blue herons and waterfowl utilize the wetland extensively. Active/passive recreation and education have been rated very high in this wetland. This area is a major Audubon birding site locally. Wetland 7 North Wetland 7 North would be classified as palustrine emergent and palustrine scrub - shrub. This wetland is approximately 12 acres in size. This wetland is bounded to the north by Southwest 19th Street, East Valley Road to the east, Lind Avenue Southwest to the west, and Southwest 21st Street to the south. Vegetation. Emergent vegetation consists of a monotypic stand of common cattail that is interspersed with open water. Scrub -shrub vegetation occurs in small patches, and is dominated by red alder, willow, and Douglas' spirea. A few black cottonwood snags were observed within the wetland. Soil. This area has been mapped by the U.S. Soil Conservation Service as Snohomish silt loam, Puget silty clay loam, and Tukwila muck which are all listed as hydric soils (Table 4). Soils observed during the field investigation at a depth of 10 inches were low chroma, dark gray silts with mottling. Hydrology. This wetland is a topographically level, isolated depression at the original valley floor elevation. Water sources for this wetland are primarily precipitation and the regional groundwater. No inlet or outlet structures were observed. Water from the road is not diverted into the wetland. However, during high storm events, this wetland receives overland flow from adjacent roads and development. During field investigation, saturation at the surface or inundation to a depth of 2 inches was observed. Functional Values. The primary source of water to this wetland is the regional groundwater. During flooding events or increased precipitation, this wetland provides recharge of the regional groundwater. The lack of a discharge site (inlet or outlet) limits this functional value. This wetland functions primarily as storage and possible recharge of regional groundwater. This wetland has been rated medium for flood storage, especially during high storm events due to the large size and depressional topography. These values become increasingly important as development increases in the area and flooding volumes continue to increase. Sediment trapping has been designated as medium in this wetland. Emergent vegetation is very dense which provides for high biofiltration capabilities. This rating is lowered to medium because the wetland is isolated. However, during flooding events this BECKM BUCK RIVM 09i22i92c 17 wetland receives water from road runoff and adjacent developments; sediment trapping capabilities become very important due to the pollutants carried by the flooding water. The presence of standing water and an extensive community of fast growing emergent species provides for high primary productivity and food chain support within this wetland. Wildlife habitat has been rated high. The patches of scrub -shrub vegetation and the few snags provide cover and perching sites for birds. The large emergent areas and the presence of standing water provide suitable habitat for amphibians and small mammals. Active/passive recreation such as bird watching is good. The wetland is accessible from the sidewalk that bounds the wetland to the east, west, and north. Wetland 7 South Wetland 7 South would be classified as palustrine scrub -shrub and emergent wetland. This wetland is approximately 3 acres in size and is located south of Southwest 21st Street, west of East Valley Road, east of Lind Avenue South, and north of the Seattle Water Department and adjacent gas right-of-way. This wetland consists of two ditches along the Seattle Water Department pipeline right-of-way, the larger of which is approximately 25 feet wide with an east -west orientation. The other ditch is approximately 20 to 25 feet wide, has a north -south orientation, and flows north. During the initial inventory a forested area located north of the east -west ditch and west of the north -south ditch was identified as forested wetland. This investigation has determined this area is an upland forest. Vegetation. The wetland community type in the east -west ditch is primarily emergent, with occasional patches of scrub -shrub. Dominant emergent species observed include common cattail, reed canarygrass, and bittersweet nightshade. Slough sedge occurs occasionally in the herb layer. Scrub -shrub portions of the wetland consist of willow and Douglas' spirea. The north -south ditch is comprised of yellow flag and bittersweet nightshade in the herbaceous layer. Black cottonwood saplings are monotypic within the scrub -shrub community. This ditch is shaded by an overstory of red alder. Soil. Soils in this area have been mapped by the U.S. Soil Conservation Service as Tukwila muck and Snohomish silt loam which are both listed as hydric by the U.S. Soil Conservation Service. Soils in the wetland area were observed to be low chroma black muck with no mottling. Hydrology. This wetland receives sheetflow runoff from the adjacent disturbed upland forest, Seattle Water Department and adjacent gas right-of-way, roadways, Shurgard Storage buildings and parking lot. Other water sources to this wetland are precipitation and regional groundwater. Water in the wetland flows west underneath Lind Avenue South via a culvert and continues west in a ditch and then empties into Springbrook Creek. At the BECKM BUCK RMM 18 09/22/92e time of observation water depths within the wetland ranged from 2 to 8 inches. Water marks were observed on the bark of shrubs indicating water levels could reach approximately 3 feet during high flow periods. Functional Values. Wetland 7 South provides moderate functional values. This wetland was rated medium for flood storage capacity. Although the wetland is connected via the ditch to Springbrook Creek, its small size and channelized nature limit the flood storage capacity. Sediment trapping has been rated medium due to the dense emergent vegetation. Biofiltration of water in this wetland is important in maintaining water quality because of its connection to Springbrook Creek. The limited quantity of direct surface water input to the wetland reduces the quantity of pollutants that can be trapped. Food chain support is medium due to the emergent vegetation present however, the lack of year-round water in this wetland decreases this function. Wetland 7 South is relatively small and provides minimal cover for wildlife. However, the adjacent upland forest located north of the wetland offers a diverse area for passerine birds and small mammals. Active/passive recreation opportunities have been rated medium in this wetland. The adjacent roadways and the Seattle Water Department right-of-way provide easy access to the wetland. At the time of the field investigation this area was being used frequently by pedestrians. Wetland 8 North Wetland 8 North would be classified as a palustrine scrub -shrub and emergent wetland. This wetland is approximately 11 acres in size and is one of the most diverse wetlands in the study area. The City of Seattle water pipeline berm bounds the wetland to the north, Southwest Lind Avenue is to the west, East Valley Road is to the east, and the toe of fill establish the southern boundary. Vegetation. The scrub -shrub cover is dense and occurs within the outer portions of the wetland. Dominant shrub vegetation consists of Oregon ash, red -osier dogwood, black cottonwood, and willow. Black cottonwood and Oregon ash occasionally occur within the canopy layer. Emergent vegetation within the scrub -shrub community is sparse. Bittersweet nightshade, reed canarygrass, and creeping buttercup occur occasionally within the herbaceous layer. Toward the center of the wetland, a dense emergent community dominated by common cattail and yellow flag occurs. Mannagrass and water parsley occur occasionally within the herbaceous layer. BECKn3 Buck RFVER 09i22ro2c 19 Soil. The U.S. Soil Conservation Service has mapped the soils in this wetland as Snohomish silt loam which is listed as hydric (Table 4). Soils observed during the field investigation, sampled at a depth of 8 to 10 inches, are low chroma dark gray to very dark brown silty loams. Hydrology. The primary water source for this wetland is flow from a culvert at the northeastern corner of Wetland 8 North which directs water from city street storm systems west into Wetland 8 North. This ditch is located along the northern wetland boundary. Other water sources in this wetland are precipitation, runoff from adjacent fill area, regional groundwater, and backup from Springbrook Creek during flooding events. Water exits the wetland via a ditch which flows west through Wetland 10 and empties into Springbrook Creek. Inundation in emergent areas ranged from 1 to 12 inches. Saturation to the surface or 1 inch of inundation was observed in scrub -shrub portions of the wetland. Functional Values. Due to the surface water connection with Springbrook Creek, the wetland exhibits both recharge and discharge functions. During high flow periods, some recharge of groundwater occurs as flows from Springbrook Creek back up into the wetland. During low flow the wetland discharges flow to Springbrook Creek. The magnitude of this function is limited by the small size and ditch configuration of the wetland. Springbrook Creek provides an excellent groundwater discharge site. Groundwater discharge functions to maintain water levels within Springbrook Creek. During periods of flooding and backup from Springbrook Creek, the wetland functions to recharge the regional groundwater. This wetland also provides excellent flood storage due to the large size, depressional topography, proximity to roads, commercial development, association with Springbrook Creek, and presence of structures that direct water flow (ditch, inlet, and outlet). This wetland possesses a direct surface water connection to Springbrook Creek and receives pollutant -laden runoff from urban areas. These factors, in combination with the dense and diverse shrub and emergent vegetative community, promote excellent sediment trapping capabilities. The presence of standing water and an extensive community of fast growing emergent species provide for high primary productivity and food chain support ratings. The vegetative structure and size of the wetland provide good wildlife habitat for small birds, small mammals, and amphibians. Although fish do not utilize this wetland, the wetland does serve to improve water quality to Springbrook Creek, which supports fish. Runoff to the creek would have an effect on fisheries habitat. Fish may utilize the ditch along the north side of the wetland. Active/passive recreation opportunities were rated medium in this wetland and the surrounding wetlands. The adjacent roadways and the Seattle Water Department right-of- way provide easy access to the wetland. At the time of the field investigation this area was being used frequently by pedestrians. BECK/T3 BLACK RIVER I9/22/92& 20 Wetland 8 South Wetland 8 South is a series of small isolated wetlands that would be classified as palustrine emergent. Collectively, these wetlands are approximately 5 acres in size. The wetlands occur in an area that was previously graded and filled. The wetlands have developed in depressional areas due to uneven grading and soil compaction. Upland grass immediately surrounds these wetlands. Generally, Wetland 8 North, Southwest 27th Street, East Valley Road, and Southwest Lind Avenue border these wetlands to the north, south, east, and west respectively. Vegetation. Vegetation within these wetlands is not diverse. In the lowest portion of the wetlands, common spike-rush is the dominant herbaceous species. Soft rush occurs commonly within the outer portions of the wetland. Occasionally, reed canarygrass and bentgrass occur interspersed within the soft rush. Soil. Soils in this area have been mapped by the U.S. Soil Conservation Service as Snohomish silt loam which is indicated as hydric by the U.S. Soil Conservation Service (Table 4). This area has been graded and filled; soil color is not applicable in determining hydric soil characteristics. Soils were assumed based on the presence of wetland hydrology and hydrophytic vegetation. Hydrology. These wetlands are hydrologically isolated from adjacent water bodies. The water source is primarily precipitation. Wetlands may receive some runoff from adjacent upland fill areas. The lowest portions of these wetlands typically are inundated with about 1 inch of water. Functional Values. Functional values for these wetlands have been rated low due to the size, lack of structural and community diversity, and isolated and disturbed nature. Collectively, these wetlands provide for some flood storage and wildlife habitat. However, these wetlands are extremely limited in providing for sediment trapping, food chain support, and groundwater recharge and discharge. Wetland 9 Wetland 9 would be classified as a palustrine forested system located north and east of Springbrook Creek and north of Southwest 23rd Street. The wetland is a linear system approximately 2 acres in size, has a north -south orientation, and is connected by a drainage ditch to Springbrook Creek at the southwestern corner. The wetland is a remnant of the original valley floor and the elevation is much lower than the surrounding recent fill areas. Vegetation. The canopy is comprised of black cottonwood, red alder, willow, and red - osier dogwood. Dominant species in the shrub layer include vine maple and red -osier dogwood. The herbaceous layer is sparse due to the dense shrub layer. BECKM BLACK MVM 09/22/92e 21 Soils. The U.S. Soil Conservation Service has mapped the soil in this area as Snohomish silt loam and Woodinville silt loam which are both listed as hydric soils (Table 4). Soils observed onsite at a depth of 8 inches are dark gray sandy loams with mottles. Hydrology. The wetland receives surface water via the ditch which originates from Panther Creek Wetland, runoff from development west of the wetland, overbank flooding from Springbrook Creek, and regional groundwater. No soil inundation or saturation was observed during the field investigation; however, wetland hydrology was assumed based on water marks on trees, drift lines, and the presence of algal mats. Functional Values. Functional values for this wetland have been reduced due to the recent filling east of the wetland and the small size of the wetland. Groundwater discharge and recharge have been rated medium due to the small size of the wetland. The wetland is connected to Springbrook Creek thus providing some discharge during low flow periods. Flood storage is low due to the small size and linear shape of the wetland. However, this function is important due to the close proximity of new development to the wetland and the direct connection to Springbrook Creek. Water purification in this wetland is rated low due to the lack of dense herbaceous vegetation. Water quality is likely to be poor due to surface runoff from adjacent development and pollutants in Springbrook Creek. Food chain support and wildlife habitat are low due to the lack of a diverse emergent layer, open water, and the small linear shape. However this forested system could provide habitat and nutrients utilized by small mammals, birds, and invertebrates. Fishery habitat in this wetland is rated low; however, this function is important because of the connection of this wetland to Springbrook Creek. Active and passive recreation is low because of the small size of the wetland and lack of access and sight to the wetland. Wetland 10 Wetland 10 would be classified as a mature palustrine forest. The wetland is approximately 13 acres in size and is located east of Springbrook Creek and north of Southwest 27th Street. The wetland is a linear system that is connected by a drainage ditch that runs east -west from Lind Avenue Southwest to Springbrook Creek. A beaver dam is located at the point where the ditch discharges into Springbrook Creek. The wetland is a remnant of the original valley floor and the elevation is approximately 6 to 8 feet lower in areas than the surrounding fill areas. In addition, a small portion of this remnant wetland exists north of Southwest 27th Street and east of Lind Avenue Northwest. BECKM Buck RfvER 22 o9i22i9u Vegetation. The canopy consists of black cottonwood and willow. The shrub layer is very dense and is dominated by red -osier dogwood. The herbaceous cover in the wetland is sparse due to shading and competition from the shrub layer. The wetland is interspersed with standing water. Reed canarygrass is found growing occasionally on the edges of the wetland where disturbance from road construction occurs. Soils. The U.S. Soil Conservation Service has mapped the soil in this area as Snohomish silt loam, and Puget silty clay loam which are both listed as hydric soils (Table 4). Soils observed onsite at a depth of 12 inches are very dark brown loams with no mottles. Hydrology. The wetland receives surface water from development east of the wetland via the ditch and along the northern wetland boundary, overbank flooding from Springbrook Creek, sheetflow runoff, and regional groundwater. Saturation to the surface and inundation to a depth of 1 inch were observed in the wetland areas at the time of the field investigation. In addition, water in the ditch was at a depth of 2 feet. Functional Values. This wetland was rated as one of the highest quality in the City of Renton during the City of Renton Wetlands Study (1981). Functional values for this wetland have been reduced since that study was completed due to adjacent development and loss of wetland acreage. Groundwater discharge and recharge have been rated high for this wetland due to its size and proximity to Springbrook Creek. The ditch at the south end of the wetland, however, reduces floodflow residence time. Flood storage capabilities have been rated as one of the highest in the study area because the wetland is at the original elevation and is considerably lower than the surrounding fill areas. In addition, the direct surface water connection to Springbrook Creek allows floodwaters to back up into the wetland. This function is somewhat decreased by the small size of the wetland. Shoreline anchoring is rated very high. Large black cottonwood trees and dense understory line the banks adjacent to Springbrook Creek, reducing turbulence from overland flow during flood events. Water purification is an important function in this wetland because water discharges directly into Springbrook Creek. However, the lack of dense herbaceous vegetation limits the amount of water purification abilities. Water quality is most likely poor due to pollutants received from Springbrook Creek. Food chain support is rated low due to the lack of a diverse emergent layer. Since the wetland contains two wetland classes, wildlife habitat has been rated medium. This BECKM BLACK RIVER 09i22i92e 23 wetland could support a number of different species. Forested and shrub areas are densely vegetated and are likely to provide nesting habitat for ground, shrub, cavity, and tree nesting birds. Shrub and herbaceous layers provide good cover for small mammals, invertebrates, and amphibians. Fishery habitat in this wetland has been rated low. However, this function is important because of the connection of this wetland to Springbrook Creek. Active/passive recreation opportunities are rated medium because the wetland is accessible by a road. Wetland 11 Wetland 11 would be classified as a large palustrine emergent and scrub -shrub wetland of approximately 28 acres. The wetland is located east of Springbrook Creek, south of Southwest 27th Street, and west of Lind Avenue Southwest. The wetland is most likely a remnant of the original valley floor, with the elevation being lower than the surrounding roads and development. Vegetation. The palustrine emergent community is located in the eastern portion of the wetland and consists of monotypic stands of common cattail. The remaining wetland is scrub -shrub and is densely vegetated in portions with willow and Douglas' spirea. Reed canarygrass is the dominant species in the herbaceous layer and is found growing on the outer edges of the wetland and in areas appearing to have higher elevation. Soils. The U.S. Soil Conservation Service has mapped the soil in this area as Snohomish silt loam and Woodinville silt loam; both are listed as hydric soils (Table 4). Soils observed at a depth of 10 inches are very dark grayish brown silts with mottles. Hydrology. Water sources to this wetland include overbank flooding from Springbrook Creek, sheetflow runoff from roads, and regional groundwater. At the time of the field investigation, soils were not inundated; however, soils were saturated to the surface. There are no ditches associated with this wetland. Functional Values. The size and diversity of this wetland impart high functional values. Wetland 11 is one of the largest wetlands in the study area and functional values have been rated very high. Groundwater discharge and recharge have been rated high for this wetland due to its size and proximity to Springbrook Creek. The lack of a surface water inlet or outlet allows floodflows from the creek to remain in the wetland for extended lengths of time. This promotes infiltration and recharge. Flood storage capability has been rated very high because the wetland is at the original elevation and is considerably lower than the surrounding fill areas. This function BECK r3 BLACK [Tx 24 m/u/92e is enhanced because of the large size, dense vegetation, and location for fill. In addition, there is no inlet or outlet, so residence time of water is increased. Shoreline anchoring is rated very high. Dense vegetation lines the banks adjacent to Springbrook Creek, reducing turbulence from overland flow during flood events. Water purification capabilities are very high in this wetland. The large size, combined with dense stands of cattails and long residence time of water, provide excellent biofiltration. Food chain support has been rated medium due the dense herbaceous layer. This function is decreased slightly due to lack of diversity and open water. Since the wetland contains two wetland classes with no open water, wildlife habitat has been rated medium. Shrub and herbaceous layers provide good cover for small mammals, invertebrates, and amphibians. Fishery habitat in this wetland is low because of the lack of a connection of this wetland to Springbrook Creek. Active and passive recreation in this wetland is rated high. There are good opportunities for wildlife observation, and access to the borders of the wetland are from a road. Wetland 12 Wetland 12 would be classified as palustrine emergent, scrub -shrub, and ponded open water. This wetland is approximately 41 acres in size and is one of the largest and most diverse wetlands in the study area. This wetland is located west of Springbrook Creek, south of Southwest 27th Street, and north of Southwest 31st Street. The wetland is bisected by a north -south walking trail. A wide, shallow ditch borders the northern portion of the wetland and empties into Springbrook Creek. The wetland is most likely a remnant of the original valley floor, with the elevation being lower than the surrounding roads and development. Vegetation. The palustrine emergent community is interspersed with open water and scrub -shrub communities. The emergent community is dominated by monotypic stands of common cattail. The remaining wetland is scrub -shrub and is densely vegetated in portions with willow and Douglas' spirea, which are dominant within the shrub layer. Reed canarygrass is the dominant species in the herbaceous layer and is found growing on the outer edges of the wetland and in areas appearing to have higher elevation. Soils. The U.S. Soil Conservation Service has mapped the soil in this area as Woodinville silt loam, which is listed as hydric (Table 4). Soils observed at a depth of 10 inches are very dark grayish brown sandy silts with mottles. BECKrD BUCK RIVFR 09in/92c 25 Hydrology. Water sources for this wetland include overbank flooding from Springbrook Creek, sheetflow runoff from roads, and regional groundwater. At the time of the field investigation, soils were not inundated; however, soils were saturated to the surface. A wide shallow ditch located on the north boundary of the wetland contained no standing water. Functional Values. Wetland 12 is one of the largest wetlands in the study area, and functional values are rated as some of the very highest in the study area. Groundwater discharge and recharge are similar to those described for Wetland 11. The ditch at the north end of the wetland, however, reduces floodflow residence time. Flood storage capabilities are rated very high because the wetland is at the original elevation and is considerably lower than the surrounding fill areas. This function is enhanced because of the large size, dense vegetation, and location of fill. Shoreline anchoring is rated very high. Dense vegetation lines the banks adjacent to Springbrook Creek, reducing turbulence from overland flow during flood events. Water purification capabilities are rated very high in this wetland. The large size, combined with dense stands of cattails and long residence time of water, provides excellent biofiltration. Food chain support is very high due the dense herbaceous layer, diversity of plant communities, and open water. Since the wetland contains a variety of plant communities, wildlife habitat is rated very high and could support a number of different species. Shrub and herbaceous layers provide good cover for small mammals, invertebrates, and amphibians. Fishery habitat in this wetland is low; however, this function is important because of the connection of this wetland to Springbrook Creek. Active and passive recreation in this wetland are high. There are good opportunities for wildlife observation, and access to the borders of the wetland is by road or boat from Springbrook Creek. Wetland 13A The Springbrook Creek riparian wetland would be classified as a palustrine forest, scrub -shrub, and emergent system. The wetland is approximately 4 acres in size and is bisected by Springbrook Creek. It is directly adjacent to the Springbrook Creek channel and has been designated as "Waters of the State" by the U.S. Army Corps of Engineers (Seattle District). The wetland is located east of the Longacres Race track and south of Southwest 16th Street. Vegetation, soils, and hydrology are highly disturbed due to site grading, BECK/ M BUCK RIVFR W/22/92c 26 stormwater management activities, and hydrology in Springbrook Creek. This description is based on reports by L. C. Lee & Associates (1991a) and the Jones & Stokes Associates field investigation. Vegetation. Wetlands in and along the stream channel are approximately 10 to 15 feet below the upper wetlands due to channelization of the creek and fill in upper areas. The western portion of the wetland supports a riparian forest/shrub community dominated by black cottonwood and willow. The major portion of the wetland supports a scrub -shrub community interspersed with an emergent community. Himalayan blackberry and Douglas' spirea comprise the scrub -shrub portion of the wetland. Reed canarygrass is dominant within the herbaceous layer. West of the riparian shrub/forest area, the community changes to a palustrine emergent wetland dominated by reed canarygrass. Soils. Soils in this wetland have been mapped by the U.S. Soil Conservation Service as Puyallup fine sandy loam, a hydric soil (Table 4). Soils sampled in limited areas in the wetland at 10 inches have dark brown chroma with no mottles. Hydrology. Water sources to this wetland have been altered and consist of a combination of precipitation input, overbank flows from Springbrook Creek, stormwater flow from urban/industrial sites, parking lots, and subsurface flow. Stormwater discharges into Springbrook Creek. At the time of the site investigation, soils in the palustrine emergent portion of the wetland were saturated to a depth of 2 inches in areas. Functional Values. Groundwater discharge and recharge in this wetland are rated medium due to the association with Springbrook Creek. However, these functions are limited because of the elevation difference between the stream and the wetlands. A more detailed analysis of this function and flood storage will be possible when hydrologic modeling of floodflow elevations is completed. Flood storage in this wetland is low because the creek has been channelized and the steep sides do not provide for good flood storage. In addition, the reed canarygrass meadow area is topographically level and provides minimal flood storage. Shoreline anchoring is medium due to vegetation growing along streambanks. However, this function is decreased due to the steep streambanks. Water purification is rated medium in portions of the wetland that are densely vegetated. The major portion of the emergent community in this wetland is reed canarygrass which has been shown to remove metals from water (Kulzer 1990). In addition, this function is important because the wetland is associated with Springbrook Creek. However, wetlands in the stream channel provide low purification, and water quality is poor due to pollutants in Springbrook Creek. Food chain support is low due to low plant diversity. Wildlife habitat is rated medium in the forested portions of the wetland, which provide canopy cover and nesting for BECK/n BUCK RIVER 09i=ro2c 27 birds and mammals. Since the emergent portion of the wetland consists of a monoculture of reed canarygrass, this area provides low wildlife habitat. Fisheries habitat in this wetland is important and has been rated high because of its association with Springbrook Creek. The emergent portions of the wetland inundated by Springbrook Creek provide rearing and cover areas for salmonids. Active/passive recreation, heritage, and education are low because the property is privately owned and development is proposed in the area. Wetland 13B These wetlands are located inside the main racetrack infield at Longacres and would be classified as palustrine emergent. The wetlands are approximately 20 acres in size. Vegetation, soils, and hydrology are highly disturbed due to landscaping activities, site grading, stormwater management activities, and management of hydrology in Springbrook Creek. This description is based on reports by Shapiro and Associates (1992) and from the Jones & Stokes Associates field investigation. Vegetation. Four palustrine emergent wetlands are located within the main racetrack infield. Emergent vegetation within these wetlands is actively maintained and mowed. In general, these wetlands are a mosaic of swales and small depressions either associated with a drainage ditch or hydrologically isolated. Wetland vegetation is similar within drainage ditch portions of wetlands and within swale and depression portions of wetlands. Wetland vegetation within the drainage ditches includes soft rush, common spike-rush, hardstem bulrush, creeping buttercup, and bentgrass. Dominant vegetation within swales and depressions includes Pacific silverweed, common plantain, and bentgrass; brass buttons and creeping buttercup occur occasionally. Soils. The U.S. Soil Conservation Service has mapped this area as Urban land, a nonhydric soil (Table 4). Soils and hydrology in the wetland were not sampled; however, a detailed wetland report revealed soils at 10 to 12 inches are sandy clay loams and silty clay loams with low chroma, dark gray with strong brown mottles (Shapiro and Associates 1992). Hydrology. Water sources to this wetland have been altered and consist of a combination of precipitation input, stormwater flow from urban/industrial sites, parking lots, and subsurface flow. Stormwater discharges into Springbrook Creek. A previous wetland report described depth to standing water at 7 to 14 inches. Functional Values. Functional values as a whole are minimal or nonexistent for this wetland because it is a maintained racetrack. Water quality is assumed very poor due to high animal usage and fertilizers. BECICM BACK 09/12/92e 28 Wetland 13C The South Marsh wetland would be classified as palustrine emergent. The wetland is approximately 11 acres. The wetland is located in Longacres Park south of the main racetrack infield and west of Wetland 12. This description is based on reports by Shapiro and Associates (1992) and the Jones & Stokes Associates field investigation. Vegetation. Dominant emergent vegetation within this wetland includes dense stands of reed canarygrass, and common cattail. Patches of willow saplings and trees occur throughout the wetland area. Soils. The U.S. Soil Conservation Service has mapped soils in this area as Woodinville silt loam, a hydric soil (Table 4). Soils sampled at a depth of 10 inches were grayish brown silt loams with dark brown mottles. Hydrology. Water sources to this wetland have been altered and consist of a combination of precipitation input, stormwater flow from urban/industrial sites, parking lots, and subsurface flow. Stormwater discharges through a culvert into Springbrook Creek. At the time of the site investigation, open water was observed and areas of the wetland were inundated with 3 inches of water or saturated to the surface. Functional Values. The depressional topography and association with Springbrook Creek allow this wetland to function alternately as a recharge and discharge site for the shallow groundwater lenses associated with the creek. Flood storage in this wetland is high due to the large size and the depressional topography. The wetland is densely vegetated, which allows the area to store large amounts of water. In addition, the wetland is associated with Springbrook Creek so it can receive and store water during the peak flood season. The ability for this wetland to function in water purification or sediment trapping is high. Vegetation in the wetland is very diverse and densely vegetated. This function is important because of the wetland association with Springbrook Creek. Water quality in this wetland is probably fair due to runoff from fertilizers. If the wetland receives floodwaters from Springbrook Creek, water quality would decrease due to pollutants. Food chain support in this wetland is rated very high due to the diversity of vegetation and the large palustrine emergent community interspersed with standing water. Since the wetland contains a variety of plant communities, wildlife habitat is rated very high. This wetland could support a number of different species. Forested areas are likely to provide nesting habitat for ground, shrub, cavity, and tree nesting birds. Shrub and herbaceous layers provide good cover for small mammals, invertebrates, and amphibians. BE"rM Buck MVM 29 09/n/vim Active/passive recreation, heritage, and education in this wetland are rated medium. The wetland is diverse and offers bird watching and easy access. However, public access is minimal because the property is privately owned and development is proposed in the area. Wetland 14 Wetland 14 is a series of isolated wetlands and would be classified as palustrine scrub -shrub and emergent. The wetlands collectively are approximately 3 acres in size and are located west of Lind Avenue Southwest and north of Southwest 34th Street. Palustrine scrub -shrub and emergent wetland is located west of Springbrook Creek; palustrine emergent wetlands are located east of Springbrook Creek. The wetland area has been previously graded and filled and wetlands have developed in depressional areas of uneven grading and compacted soils. Vegetation. The palustrine scrub -shrub community consists of black cottonwood and willow in the shrub layer. Dominant species in the herbaceous layer include reed canarygrass, bentgrass, soft rush, and common spike-rush. Vegetation observed within the palustrine emergent wetlands east of Springbrook Creek is comprised of common spike-rush and soft rush. Soils. The U.S. Soil Conservation Service has mapped the soil in this area as Snohomish silt loam and Woodinville silt loam, both of which are hydric soils (Table 4). Soils observed in all of these wetlands were non-native fill material. Hydrology. Water sources for these wetlands are precipitation and road runoff. Saturation to the surface and inundation to a depth of 1 inch were observed in the wetland areas at the time of the field investigation. Functional Values. Functional values for these wetlands have been rated low due to the size, lack of structural and community diversity, and isolated and disturbed nature. The shrub layer in the wetland west of Springbrook Creek provides some cover for wildlife. However, these wetlands are extremely limited in providing for sediment trapping, food chain support, and groundwater recharge and discharge. Collectively, wetlands provide for some flood storage and wildlife habitat. Wetland 16 Wetland 16 is a palustrine scrub -shrub and emergent wetland located east of Oakesdale Avenue, north of Southwest 27 Street and Wetland 12, south of Longacres property, and west of undeveloped cleared property and Springbrook Creek. Vegetation. The majority of the wetland is vegetated with a dense shrub community and is dominated by black cottonwood, willow, and Douglas' spirea. Reed canarygrass occurs occasionally within the herbaceous layer underneath the shrub community and is BECK/" Buck RI 30 09i22ro� dominant within the emergent community. Common cattail and creeping buttercup occur occasionally within the emergent community. Soils. Soils within this wetland have been mapped by the U.S. Soil Conservation Service as Woodinville silt loam, which is a hydric soil (U.S. Soil Conservation Service 1990) (Table 4). Soils observed at a depth of 10 inches are dark gray silts. Hydrology. This wetland is an isolated enclosed depression that receives water from road runoff and precipitation. During the field investigation, approximately 3 inches of standing water was observed throughout the majority of the wetland. Functional Values. Functional values for this wetland have been rated low due to its size and isolated nature. The presence of more than one community type provides some structural diversity that augments the wildlife habitat value, and the depressional topography offers some flood storage. However, the surrounding land uses, isolated nature, and size of this wetland extremely limit the potential for food chain support, sediment trapping, active/passive recreation, and groundwater recharge and discharge. Wetland 22 Wetland 22 is a palustrine forest and palustrine scrub -shrub wetland. This wetland is approximately 18 acres in size and is located north of Southwest 33rd Street and west of Oakesdale Avenue South just south of Longacres Park. The wetland area is generally flat and has been graded and filled. An east -west ditch is situated along the northern edge of the wetland. This ditch turns south at the northwestern wetland corner, continuing south through Wetland 45 and eventually into Wetland 3. The following description is based on previous reports (David Evans and Associates 1991g) and the Jones & Stokes Associates field investigation. Vegetation. The wetland consists of dense patches of an even mixture of palustrine forest and scrub -shrub communities. Palustrine emergent wetland occurs occasionally in small areas where the forest and scrub -shrub communities open up. Forested portions of the wetland are dominated by western crabapple, willow, red -osier dogwood, black cottonwood, and red alder. The shrub layer is sparse underneath the dense canopy. However, in areas where the canopy is open, the shrub layer is densely vegetated with saplings of the dominant canopy species listed above, as well as Douglas' spirea. The herbaceous layer is sparse and commonly vegetated with creeping buttercup, soft rush, and common horsetail. The wetland edge is densely vegetated with Himalayan blackberry, reed canarygrass, and soft rush. Soils. The U.S. Soil Conservation Service has mapped the soil in this area as Woodinville silt loam which is listed as hydric (Table 4). The till layer was reached at approximately 4 inches. Soils observed at a depth of 4 inches were gravelly sands; soil color was not sampled due to soil texture. BECKM Buac RnrM 31 o9/u/9ze Hydrology. The primary source of water for this wetland is precipitation and a drainage ditch. The ditch enters the wetland at the northwestern corner and is situated east - west along the northern wetland edge. The ditch turns north -south at the northeastern wetland corner and continues south out of the wetland. A relict stream channel is evident within the central portion of the site; however, this has been disturbed by fill activities. Surface and groundwater flows are presently diverted away from the relict stream through the drainage ditch. Functional Values. Functional values of this wetland are moderate to low. The level topography offers limited flood storage. The connection with the ditch provides some water purification values; however, this is limited by the lack of emergent vegetation present within the ditch. The dense canopy and shrub community provide cover and nesting or perching sites for small mammals and birds. Wetland 32 Wetland 32 is a series of wetlands that would be classified as a palustrine forest in the southcentral portion of the site and scrub -shrub in the northern portion of the site. The wetlands collectively are approximately 6.5 acres in size and are located east of Oakesdale Avenue Southwest, south of Southwest 34th Street, and north of Southwest 39th Street. The wetland area has been previously graded and filled, and wetlands have developed in depressional areas of uneven grading and compacted soils. Vegetation. The forested community is dominated in the canopy layer by black cottonwood and willow. Black cottonwood and willow saplings comprise the shrub layer. Herbaceous cover is sparse; grasses and forbs occasionally occur. The emergent wetlands are shallow depressions in a topographically level upland area dominated by bentgrass. The herbaceous vegetation is dominated by foxtail, soft rush, and bentgrass. Soils. The U.S. Soil Conservation Service has mapped the soil in this area as Woodinville silt loam, a hydric soil (Table 4). Soils observed onsite were non-native fill material. Hydrology. The water source for these wetlands is primarily precipitation input. Wetlands at this site lack an inlet or outlet source. At the time of the investigation, no inundation or saturation was observed in the forested portion; however, wetland hydrology was assumed based on depressional topography and bare ground. This area has recently been confirmed as a wetland by David Evans and Associates (1991b). Saturation to the surface and inundation to a depth of 1 inch were observed in the emergent wetland areas. Functional Values. Functional values for these wetlands have been rated low due to the size, lack of structural and community diversity, and isolated and disturbed nature. Wetlands are extremely limited in providing for sediment trapping, food chain support, and groundwater recharge and discharge. Collectively, wetlands provide for some flood storage BWKM Bucx RFVM 32 a9/au/92c and wildlife habitat. The surrounding land use is primarily commercial development. The canopy and shrub layer do provide cover for some small birds and mammals. The depressional topography also provides some flood storage values. Wetland 33 Wetland 33 is a series of seven isolated wetlands that would be classified as palustrine scrub -shrub and emergent. Collectively the wetlands are approximately 4 acres in size and are located east of Lind Avenue Southwest and south of Southwest 34th Street. The wetland area has been previously graded and filled, and wetlands have developed in depressional areas of uneven grading and compacted soils. Vegetation. The wetlands are interspersed throughout the area with upland. The upland areas are dominated by various upland grasses. The scrub -shrub wetland is dominated by a monotypic stand of black cottonwood saplings. There is no understory. The emergent wetlands are dominated by soft rush, reed canarygrass, and bentgrass in the herbaceous layer. Soils. The U.S. Soil Conservation Service has mapped the soil in this area as Snohomish silt loam, which is a hydric soil (Table 4). Soils observed onsite were non-native fill material. Hydrology. Water sources for these wetlands are precipitation input and road runoff. Wetlands at this site lack an inlet or outlet source. Saturation to the surface and inundation to a depth of 1 inch were observed in the wetland areas at the time of the field investigation. Functional Values. Functional values for these wetlands have been rated low due to the size, lack of structural and community diversity, and isolated and disturbed nature. Wetlands are extremely limited in providing for sediment trapping, food chain support, and groundwater recharge and discharge. Collectively, wetlands provide for some flood storage and wildlife habitat. The surrounding land use is primarily commercial development; the shrub layer provides some habitat for small birds or small mammals. Wetland 37 Wetland 37, known as the Panther Lake Wetland, is classified as palustrine scrub - shrub, emergent, and open water. This wetland is approximately 63 acres and is located west of 116th Avenue Southeast and south of Southeast 200th Street. This wetland is associated with Panther Lake, a shallow eutrophic lake that is becoming densely vegetated as it develops into a scrub -shrub wetland. The lake has an outlet on the north side to Panther Creek. This wetland has been previously identified in the King County Sensitive Areas Inventory as Black River 6 Panther Lake. BECKM BUCK RIVER I9i22i92c 33 Vegetation. The wetland consists of a large open water area surrounded by scrub - shrub and emergent communities. The shrub layer is dominated by red alder, willow, and Douglas's spirea. The emergent community consists of creeping buttercup, soft rush, and sedge in the herbaceous layer. Soils. The U.S. Soil Conservation Service has mapped the soil in this area as Seattle Muck, a hydric soil (Table 4). Soils were not sampled onsite because the wetland was previously identified by King County. Hydrology. The water source within this wetland is precipitation, runoff from adjacent residential housing, and backup from Panther Lake and Panther Creek. Panther Lake is fed by the upper reaches of Panther Creek, which drain the urban areas of east Kent. The hydrologic regime of this wetland is dictated by the water levels in Panther Lake. Panther Lake and Panther Creek are also discharge sites for the wetland. Functional Values. This wetland provides excellent wildlife habitat, food chain support, flood storage, and sediment trapping functional values. The association with Panther Lake and Panther Creek, large size of the wetland, and the structural and community diversity of this wetland augment such functional values. Due to its association with Panther Lake, this wetland provides excellent discharge/recharge capabilities. During high storm events, the wetland functions in recharge of the regional groundwater. During periods of low lake or creek levels, the wetland functions in maintaining water levels by discharge of groundwater from the wetland. Flood storage is rated very high due to the large size, dense vegetation, and association with Panther Lake. This wetland has been rated high for shoreline anchoring. The dense vegetation present in the wetland helps prevent shoreline erosion by lake level fluctuation and wave action. Sediment trapping capabilities of the wetland have been rated very high due to the large size and dense herbaceous vegetation. This will directly benefit water quality in Panther Creek and Springbrook Creek. The presence of standing water and an extensive community of fast-growing emergent species provides for very high primary productivity and food chain support. The dense shrub cover provides suitable habitat for various small mammals, small birds, and amphibians. Panther Lake provides a good landing site for migratory birds. As mentioned in the description for the Panther Creek Wetland, a fishery survey of the lower reaches of Panther Creek conducted by R. W. Beck and Associates in 1989 BECKM Buac RrVM 34 o9i22i9� yielded only several fish. These fish were thought to originate from Panther Lake (Jones & Stokes Associates 1991). Fish habitat in this wetland is important because of its association with Panther Creek. The emergent portions of the wetland inundated by the lake provide rearing and cover areas. Most of the surrounding land is residential. Access to the wetland is limited because property surrounding the wetland is privately owned. This decreases any active/passive recreation or education available beyond the property owners' use. Wetland 40 Wetland 40 is a group of six small wetlands, five of which are classified as palustrine emergent wetlands; one is classified as scrub -shrub. The wetlands are located west of Lind Avenue Southwest and south of Southwest 34th Street, and collectively they are less than 1 acre in size. The wetland area has been previously graded and filled, and wetlands have developed in depressional areas of uneven grading and compacted soils. Vegetation. The emergent wetlands are shallow depressions in a topographically level upland area dominated by bentgrass. The emergent wetlands consists of either monotypic stands of reed canary grass or foxtail, soft rush, and bentgrass. Marsh speedwell occurs occasionally within the herbaceous layer. Black cottonwood dominates the scrub -shrub wetland. Herbaceous cover is sparse with grasses and forbs occurring occasionally. Soils. The U.S. Soil Conservation Service has mapped the soil in this area as Woodinville silt loam, a hydric soil (Table 4). Soils observed onsite were non-native fill material. Hydrology. Water sources for these wetlands are precipitation input and road runoff. Wetlands at this site lack an inlet or outlet source. Functional Values. Functional values for these wetlands have been rated low due to the size, lack of structural and community diversity, and isolated and disturbed nature. Wetlands are extremely limited in providing for sediment trapping, food chain support, and groundwater recharge and discharge. Collectively, wetlands provide for some flood storage and wildlife habitat. Wetland 45 Wetland 45 would be classified as palustrine forest, scrub -shrub, and emergent. This wetland is approximately 18 acres in size and is located north of Wetland 3 (Orillia Pond), south of Longacres property, east of Burlington Northern railroad tracks, and west of Longview Avenue South. A ditch bisects the wetland in a north -south direction. This ditch originates at the southern end from Wetland 3 and at the northern end from Wetland 22. BECKtO BUCK RIVER 09iui9k 35 Vegetation. The wetland is primarily palustrine forest and palustrine emergent interspersed with palustrine scrub -shrub wetland. Dominant canopy cover within the forested portion of the wetland consists of black cottonwood and willow; red alder and Oregon ash occur occasionally. The shrub layer within forested portions of the wetland includes saplings of red alder, Douglas' spirea, and willow. Herbaceous vegetation underneath the canopy and shrub layers is usually sparse; soft rush occurs occasionally in patches where the canopy and shrub cover are less dense. Scrub -shrub portions of the wetland occur in patches between forested and emergent portions. Douglas' spirea is the dominant shrub and usually occurs as the only dominant. A few small scrub -shrub areas that consist of red alder, black cottonwood, and willow saplings occur. Herbaceous vegetation underneath the Douglas' spirea is sparse and consists of soft rush and reed canarygrass. Herbaceous vegetation underneath the black cottonwood and willow shrub communities is more dense but consists of the same species (soft rush and reed canarygrass). Emergent portions of the wetland consist of two plant community types. The southernmost portion of the wetland is diverse in emergent vegetation. The area includes dominant species of cattail, reed canarygrass, soft rush, and velvetgrass; mannagrass and creeping buttercup occur occasionally. The second emergent community is much less diverse, with primarily monotypic stands of reed canarygrass; soft rush occurs occasionally. Soils. This area has been mapped by the U.S. Soil Conservation Service as Puget silty clay loam and Woodinville silt loam, which are listed as hydric soils (Table 4). Soils observed at a depth of 10 inches were low chroma dark gray to very dark grayish brown clay loam, silty loam, and silty sands. Hydrology. Water sources for this wetland are overbanking of the ditch and precipitation. During field investigation, saturation at the surface or inundation to a depth of 6 inches was observed. Functional Values. This wetland provides moderate functional values. The large size of this wetland provides some flood storage; however, this is limited by the relatively level elevation of the wetland, which is not significantly lower than surrounding upland areas. The large size, connection to other wetlands through the ditch, and presence of dense emergent species augment the wetland sediment trapping and food chain support functions. The vegetative structure and size of the wetland provide good wildlife habitat for small birds, small mammals, and amphibians. Regulatory Framework Wetlands within the City of Renton are protected through the City of Renton Wetland Management Ordinance (No. 4346), which generally supports no net loss of BECKM BUCK RIVER I9i22i9k 36 wetland acreage, values, and functions by protecting high value wetlands and requiring restoration of disturbed wetlands, or creation of new wetlands when wetland losses are unavoidable. Under the Wetland Management Ordinance, wetlands are assigned a rating of Category 1(Very High Quality Wetlands), Category 2 (High Quality Wetlands), or Category 3 (Lower Quality Wetlands), based on a combination of factors, including size, diversity of habitat, and type of plant communities present. Category 1(Very High Quality Wetlands) are wetlands greater than 2,200 square feet which meet one or more of the following criteria: • The presence of species listed by federal or state government as endangered or threatened, or the presence of essential habitat for those species; • Wetlands having 40% to 60% permanent open water (in dispersed patches or otherwise) with two or more vegetation classes; • Wetlands equal to or greater than 10 acres in size and having three or more vegetation classes, one of which is open water; • The presence of plant association of infrequent occurrence, or at the geographic limits of their occurrence; or • Wetlands assigned the Unique/Outstanding # 1 rating in the current King County Wetlands Inventory 1991 or as thereafter amended. Category 2 (High Quality Wetlands) are wetlands greater than 2,200 square feet which meet one or more of the following criteria: • Wetlands greater than 2,200 square feet that are not Category 1 or 3 wetlands; • Wetlands that have heron rookeries or raptor nesting trees, but are not Category 1 wetlands; • Wetlands of any size located at the headwaters of a watercourse, but are not Category 1 wetlands; • Wetlands assigned the Significant #2 rating in the current King County Wetlands Inventory 1991 or as thereafter amended; • Wetlands having minimum existing evidence of human -related physical alteration such as diking, ditching, channelization. BECKM BLACK Rx 37 o9/zz/9k Category 3 (Lower Quality Wetlands) are wetlands greater than 5,000 square feet which meet one or more of the following criteria: Wetlands that are severely disturbed. Severely disturbed wetlands are wetlands which meet the following criteria: (1) Are characterized by hydrologic isolation, human -related hydrologic alterations such as diking, ditching, channelization, and /or outlet modification; and (2) Have soils alterations such as the presence of fill, soil removal, and/or compaction of soils; and (3) May have altered vegetation. • Wetlands that are newly emerging. Newly emerging wetlands are: (1) Wetlands occurring on top of fill materials; and (2) Characterized by emergent vegetation, low plant species richness and used minimally by wildlife. These wetlands are generally found in the areas such as the Green River Valley and Black River Drainage Basin. All other wetlands not classified as Category 1 or 2 such as smaller, high quality wetlands. It is the responsibility of City of Renton planners to make a final determination of wetland ratings. All wetlands in the City of Renton are required to have a buffer; the size of the buffer is based on the wetland category rating and, if applicable, the City of Renton Shoreline Master Program (SMP) land use designation. Wetlands not regulated by the SMP and with a category rating of 1, 2, and 3 require buffers of 100, 50, and 25 feet, respectively. Wetlands regulated under the SMP could receive one of three types of designation: urban, conservancy, and natural for each of the wetland category ratings. Category 1 wetlands which are assigned urban, conservancy, or natural SMP designations require buffers of 100, 200, and 300 feet respectively. Category 2 wetlands require buffers of 50, 100, and 200 feet respective to urban, conservancy, and natural SMP designations. Category 3 wetlands require buffers of 25, 50, and 50 feet respective to urban, conservancy, and natural SMP designations. The buffer is measured horizontally from the edge of the wetland and extends into the upland. secx/Ts suck RFVM 38 09/]2/9ze CITATIONS Printed References Adamus, P. R., and L. R. Stockwell. 1983. A method for wetland functional assessment. (No. FHWA-1P-82-23.) U.S. Department of Transportation Federal Highway Administration Office Research, Environmental Division. Washington, DC. Boeing Company. 1991. Longacres Park development information letter to the City of Renton, Don Erickson. Renton, WA. January 11, 1991. City of Renton. 1981. Wetlands study: A reconnaissance study of selected wetlands in the City of Renton. Prepared by the City of Renton Planning Department and Northwest Environmental Consultants, Inc. 1991. Black River Corporate Park tracts A and B office buildings, final environmental impact statement. Prepared by Jones & Stokes Associates, Inc., Bellevue, WA. Cowardin, L. M., V. Carter, F. C. Golet, and E. T. LaRoe. 1979. Classification of wetlands and deep water habitats of the United States. (FWS/OBS-79/31.) U.S. Fish and Wildlife Service. Washington, DC. David Evans and Associates. 1989a. Wetland delineation of the Alaska Distributors site, Renton, Washington. Prepared for Alaska Distributors Company, Seattle, WA. . 1989b. Wetland delineation for the Seattle Times facility. . 1991a. Wetland determination on the Orillia block 1, lot 12 site (Renton #6 parcel), Renton Washington. Bellevue, WA. 1991b. Wetland determination on the Orillia block 5 site (Renton #9 parcel), Renton, Washington. Bellevue, WA. . 1991c. Wetland determination on the Orillia block 6, lots 3 and 4 site (Renton #2 parcel), Renton, Washington. Bellevue, WA- . 1991d. Wetland determination on the Orillia block 8, lots 1, 2, and 3 site (Renton #8W parcel), Renton, Washington. Bellevue, WA. 1991e. Wetland determination on the Orillia block 8, lot 4 site (Renton #8E parcel), Renton, Washington. Bellevue, WA. BECK/73 BIACK RrvM 39 09i22i� 1991L Wetland determination on the proposed Orillia block 1, lot 3 site (Renton #5 parcel), Renton, Washington. Bellevue, WA. 1991g. Wetland determination on the Renton #14 parcel, Renton, Washington. Bellevue, WA. Earth Consultants Inc. 1990. Wetland delineation of the Rivertech Corporate Park. Prepared by Jones & Stokes Associates, Inc. Bellevue, WA. Erwin, K. L. 1990. Wetland evaluation for restoration and creation. Pages 429-458 in J. A. Jusler and M. E. Kentula (eds.), Wetland creation and restoration: the status of the science. Island Press. Washington, DC. IES Associates. 1990. Biological report of the Austin Property, Renton, WA. IES Associates and Scales and Associates. 1990. Preliminary wetlands evaluation of the Al Pac site Southwest 27th Street, Renton, WA. Prepared for Al Pac Associates, Seattle, WA. Jones & Stokes Associates, Inc. 1989. Tukwila wetland inventory. Bellevue, WA. Prepared for City of Tukwila, Tukwila, WA. 1990a. Letter to Washington Department of Ecology regarding wetlands on tract C (northside). . 1990b. Wetland report of the Vyzis Southgate property, Bellevue,WA. . 1991. Critical areas inventory, City of Renton wetlands and stream corridors. Bellevue, WA. Prepared for City of Renton, Renton, WA. King County. 1983. King County wetlands inventory. Three volumes. Seattle, WA. . 1990. Sensitive areas map folio. King County Department of Parks, Planning and Resources. Seattle, WA. Kulzer, L. 1990. Water pollution control aspects of aquatic plants: implications for stormwater quality management. METRO. Seattle, WA. L. C. Lee & Associates, Inc. 1991a. An analysis of the distribution and jurisdictional status of waters of the United States, including wetlands, at Longacres Park, Renton, WA. Prepared for The Boeing Company, Seattle, WA. 1991b. Letter concerning U.S. Army Corps of Engineers, Seattle District, verification of wetlands at Longacres Park, August 1, 1991. Seattle, WA. Prepared for Boeing Commercial Airplane Group, Seattle, WA. BECKM BLACK RIVER 40 09/71/92e Raedeke Associates Scientific Consulting. 1991a. Puget Western, Inc. Materials Management Complex (MMC) property, Renton, WA. Letter report. . 1991b. Conceptual wetland mitigation plan for the Puget Western Business Park, Renton, WA. March 11, 1991. R.W. Beck and Associates. 1989. City of Renton, WA, Panther Creek wetlands/P-9 channel design wetland inventory. Draft. Seacor Environmental Engineering. 1991. Data from Stemco site remediation. (unpublished data.) Bellevue, WA. Shapiro and Associates, Inc. 1989. Wetland delineation of the Container Corporation of America site, Renton, WA. Seattle, WA. Prepared for Bruce Blume and Company, Seattle, WA. . 1992. City of Renton jurisdictional wetland determination for Longacres Park development project. Prepared for Boeing Commercial Airplane Group, Renton, WA. U.S. Soil Conservation Service. 1973. Soil survey of the King County area, Washington. U.S. Department of Agriculture. Washington, DC. 1990. Hydric soils of the state of Washington. U.S. Department of Agriculture. Washington, DC. Watershed Dynamics, Inc. 1991. Wetlands evaluation and delineation report, wetlands avoidance and mitigation plan, Tukwila project site west of Longacres, City of Tukwila, WA. Auburn, WA. Prepared for McLeod Development Company, Kirkland, WA. Personal Communications Giseburt, Mike. Project manager. R. W. Beck and Associates, Seattle, WA. December 18, 1991 - telephone conversation. Straka, Ron. Civil engineer. Public Works Department, City of Renton, Renton, WA. December 4, 1991 - meeting. BECK/13 Bucx RIVER 41 09/12/92e I Appendix A. Wetland Delineation Data Forms JONES & STOKES ASSOCIATES WETLAND DELINEATION DATA FORM ONSITE DETERMINATION FOR Client: R.W. Beck Project/Site: Black River Wetlands Field Investlgator(s): Ives/Schroder Date: 5/5/92 County/City: City of Renton Wetland # 5 Plant Community: PFO Plot #: 1 Weather: clear VEGETATION Dominant Plant Species, Indicator Status, Stratum 1. Populus trichocarpa, FAC, canopy 2. Fraxinus latifolia, FACW, canopy 3. Rubus spectabilis, FAC, shrub 4. 5. 6. 7. 8. 9. Percent of dominant species that are OBL, FACW, and/or FAC: 100% Is the hydrophytic vegetation criterion met? yes Rationale: All dominant spp. are FAC or wetter. SOILS SCS Series/Phase Woodinville silt loam SCS hydric list? yes Is the observed soil a Histosol? no Depth Matrix Mottle Glev Texture 0-101, 2.5Y 3/1 yes no silt Other hydric soil indicators: Is the hydric soil criterion met? yes Rationale: chroma Comments: HYDROLOGY Is the area inundated? no Depth of water: Is the soil saturated? yes Depth to water: 10" Other field evidence of surface Inundation or soil saturation: Is the wetland hydrology criterion met? yes Rationale: saturation JURISDICTIONAL DETERMINATION AND RATIONAL Is the sample plot a wetland? yes Comments:Other spp. include; CAspp, ATFI, SYAL, and URDI. JONES & STOKES ASSOCIATES WETLAND DELINEATION DATA FORM ONSITE DETERMINATION FOR Client: R.W. Beck Project/Site: Black River Wetlands Field Investigator(s): Ives/Schroder Date: 5/5/92 County/City: City of Renton Wetland # 5-c Plant Community: PSS Plot #: 1 Weather: clear VEGETATION Dominant Plant Species, Indicator Status, Stratum 1. Populus trichocarpa, FAC, shrub 2. Salix spp., FAC-FACW, shrub 3. 4. 5. 6. 7. 8. 9. Percent of dominant species that are OBL, FACW, and/or FAC: 100% Is the hydrophytic vegetation criterion met? yes Rationale: All dominant spp. are FAC or wetter. SOILS SCS Series/Phase Woodinville silt loam SCS hydric list? yes Is the observed soil a Histosol? no Depth Matrix Mottle Glev Texture 0-10" 2.5Y 5/1 yes no silt Other hydric soil Indicators: Is the hydric soil criterion met? yes Rationale: chroma Comments: HYDROLOGY Is the area inundated? no Depth of water: Is the soil saturated? yes Depth to water: surface Other field evidence of surface inundation or soil saturation: Is the wetland hydrology criterion met? yes Rationale: saturation JURISDICTIONAL DETERMINATION AND RATIONAL Is the sample plot a wetland? yes Comments:Other spp. include Carex obnupta. JONES & STOKES ASSOCIATES WETLAND DELINEATION DATA FORM ONSITE DETERMINATION FOR Client: R.W. Beck Project/Site: Black River Wetlands Field Investigator(s): Edwins/Klein County/City: City of Renton Plant Community: PSS/PEM Weather: overcast Date: 12/4/91 Wetland # 7 North Plot #: 1 VEGETATION Dominant Plant Species, Indicator Status, Stratum 1. Alnus rubra , FAC, shrub 2. Spiraea douglasii, FACW, shrub 3. Typha latifolia, OBL, herbaceous 4. Phalaris arundinacae, FACW, herbaceous 5. 6. 7. 8. 9. Percent of dominant species that are OBL, FACW, and/or FAC: 100% Is the hydrophytic vegetation criterion met? yes Rationale: Ali dominant spp. are FAC or wetter. SOILS SCS Series/Phase Snohomish silt loam, Puget silty clay loam, and Tuckwila muck Is the observed soil a Histosol? n o Depth Matrix Mottle 9-LU 101, 10YR 4/1 yes no Other hydric soil indicators: Is the hydric soil criterion met? yes Rationale: chroma Comments: HYDROLOGY SCS hydric list? yes Is the area Inundated? no Depth of water: Is the soil saturated? yes Depth to water: surface Other field evidence of surface Inundation or soil saturation: Is the wetland hydrology criterion met? yes Rationale: saturation JURISDICTIONAL DETERMINATION AND RATIONAL Is the sample plot a wetland? yes Comments:Other spp. include Salix spp. Texture silt JONES & STOKES ASSOCIATES WETLAND DELINEATION DATA FORM ONSITE DETERMINATION FOR Client: R.W. Beck Project/Site: Black River Wetlands Field Investigator(s): Edwins/Klein County/City: City of Renton Plant Community: PEM Weather: overcast Dominant Plant Species, Indicator 1. Typha latifolia, OBL, herbaceous 2. 3. 4. 5. 6. 7. 8. 9. Date: 12/4/91 Wetland # 7 North Plot #: 2 VEGETATION Status, Stratum Percent of dominant species that are OBL, FACW, and/or FAC: 100% Is the hydrophytic vegetation criterion met? yes Rationale: All dominant spp. are FAC or wetter. SOILS SCS Series/Phase Snohomish silt loam, Puget silty clay loam, and Tuckwila muck Is the observed soil a Histosol? no Degtit Matrix Mottle fLLU 10" 10YR 4/1 yes no Other hydric soil indicators: Is the hydric soil criterion met? yes Rationale: chroma Comments: HYDROLOGY SCS hydric list? yes Is the area inundated? yes Depth of water: 1" Is the soil saturated? yes Depth to water: surface Other field evidence of surface Inundation or soil saturation: Is the wetland hydrology criterion met? yes Rationale: saturation and inundation JURISDICTIONAL DETERMINATION AND RATIONAL Is the sample plot a wetland? yes Comments:Small open water areas are present interspersed within the TYLA. Texture silt JONES & STOKES ASSOCIATES WETLAND DELINEATION DATA FORM ONSITE DETERMINATION FOR Client: R.W. Beck Project/Site: Green River Wetlands Field Investigator(s): Edwins/Klein County/City: City of Renton Plant Community: PEM Weather: clear Dominant Plant Species, Indicator 1. his Pseudacorus, OBL, herbaceous 2. Solanum spp., FACU-FAC, herbaceous 3. Carex obnupta, OBL, herbaceous 4. 5. 6. 7. 8. 9. Date: 11 /5/91 Wetland #: 7 South Plot #: 1 VEGETATION Status, Stratum Percent of dominant species that are OBL, FACW, and/or FAC: 66% Is the hydrophytic vegetation criterion met? yes Rationale: >50% of dominant spp. are FAC or wetter. SOILS SCS Series/Phase Tukwila muck and Snohomish silt loam SCS hydric list? yes Is the observed soil a Histosol? no Depth Matrix Mottle Glev 8" 10YR 2/0 no no Other hydric soil indicators: Is the hydric soil criterion met? yes Rationale: chroma Comments: HYDROLOGY Is the area inundated? yes Depth of water: 1-2" Is the soil saturated? yes Depth to water: surface Other field evidence of surface inundation or soil saturation: OHWM about 3 feet Is the wetland hydrology criterion met? yes Rationale: saturation and inundation JURISDICTIONAL DETERMINATION AND RATIONALE Is the sample plot a wetland? yes Comments: Wetland is a north -south 20-25 foot wide ditch. Texture peaty muck JONES & STOKES ASSOCIATES WETLAND DELINEATION DATA FORM ONSITE DETERMINATION FOR Client: R.W. Beck Project/Site: Green River Wetlands Field Investigator(s): Edwins/Klein Date: 11/5/91 County/City: City of Renton Wetland #: Plant Community: upland forest and shrub Plot #: I Weather: clear VEGETATION Dominant Plant Species, Indicator Status, Stratum 1. Populus trichocarpa, FAC, canopy 2. Alnus rubra sapling, FAC, shrub 3. Rubus parviflorus, FACU+, shrub 4. Spiraea douglasii, FACW, shrub 5. Rubus discolor, FACU-, shrub 6. 7. 8. 9. Percent of dominant species that are OBL, FACW, and/or FAC: 60% Is the hydrophytic vegetation criterion met? yes Rationale: >50% of dominant spp. are FAC or wetter. SOILS SCS Series/Phase Tukwila muck and Snohomish silt loam SCS hydric list? yes Is the observed soil a Histosol? no Depth Matrix Mottle Glev 0-8" N/A no no Other hydric soil indicators: Is the hydric soil criterion met? no Rationale: soil is fill material, lacks chroma Comments: HYDROLOGY Is the area inundated? no Depth of water: Is the soil saturated? no Depth to water: Other field evidence of surface inundation or soil saturation: none Is the wetland hydrology criterion met? no Rationale: lacks evidence of hydrology JURISDICTIONAL DETERMINATION AND RATIONALE Texture rocky, gravelly, loam Is the sample plot a wetland? no Comments: Area 7 has been mapped on aerial photos as wetland. Field verification showed that this area is not wetland. The area has been graded and filled. This area was probably wetland before grading and filling activities. JONES & STOKES ASSOCIATES WETLAND DELINEATION DATA FORM ONSITE DETERMINATION FOR Client: R.W. Beck Project/Site: Green River Wetlands Field Investigator(s): Edwins/Klein County/City: City of Renton Plant Community: PSS/PEM Weather: clear Date: 1 1 /5/91 Wetland #: 7 South Plot #: 2 VEGETATION Dominant Plant Species, Indicator Status, Stratum 1. Spiraea douglasii, FACW, shrub 2. Saliz spp., FAC-FACW, shrub 3. Typha latifolia, OBL, herbaceous 4. Phalaris arundinacae, FACW, herbaceous 5. 6. 7. 8. 9. Percent of dominant species that are OBL, FACW, and/or FAC: 100% Is the hydrophytic vegetation criterion met? yes Rationale: All dominant spp. are FAC or wetter. SOILS SCS Series/Phase Tukwila muck and Snohomish silt loam SCS hydric list? yes Is the observed soil a Histosol? n o Depth at Mottle Glev 8" 10YR 210 no no Other hydric soil indicators: Is the hydric soil criterion met? yes Rationale: chroma Comments: HYDROLOGY Is the area inundated? yes Depth of water: 6-8" Is the soil saturated? yes Depth to water: surface Other field evidence of surface inundation or soil saturation: Is the wetland hydrology criterion met? yes Rationale: saturation and inundation JURISDICTIONAL DETERMINATION AND RATIONALE Is the sample plot a wetland? yes Comments: Wetland is an east -west ditch that eventually flows into Springbrook Creek. Texture peaty muck JONES & STOKES ASSOCIATES WETLAND DELINEATION DATA FORM ONSITE DETERMINATION FOR Client: R.W. Beck Project/Site: Green River Wetlands Field Investigator(s): Edwins/Klein County/City: City of Renton Plant Community: PSS/PEM Weather: clear Date: 11/5/91 Wetland #: 8 North Plot #: 1 VEGETATION Dominant Plant Species, Indicator Status, Stratum 1. Saliz spp., FAC-FACW, shrub 2. Cornus stolonifera sapling, FACW, shrub 3. Typha latifolia, OBL, herbaceous 4. Phalaris arundinacae, FACW, herbaceous 5. Iris Pseudacorus, OBL, herbaceous 6. Glyceria elata, FACW+, herbaceous 7. Solarium spp., FACU-FAC, herbaceous 8. Oenanthe sarmentosa, OBL, herbaceous 9. Percent of dominant species that are OBL, FACW, and/or FAC: 88% Is the hydrophytic vegetation criterion met? yes Rationale: >50% of dominant spp. are FAC or wetter. SOILS SCS Series/Phase Snohomish silt loam SCS hydric list? yes Is the observed soil a Histosol? n o Depth Matrix Mottle Gley Texture 12" IOYR 2/2 yes no loam Other hydric soil indicators: Is the hydric soil criterion met? yes Rationale: mottles Comments: HYDROLOGY Is the area inundated? no Depth of water: Is the soil saturated? yes Depth to water: 12" Other field evidence of surface inundation or soil saturation: drift lines on trees at 12", algal watts, and drift wood. Is the wetland hydrology criterion met? yes Rationale: saturation and evidence of seasonal hydrology JURISDICTIONAL DETERMINATION AND RATIONALE Is the sample plot a wetland? yes Comments: Wetland is very diverse, wetland edge is the toe of fill. JONES & STOKES ASSOCIATES WETLAND DELINEATION DATA FORM ONSITE DETERMINATION FOR Client: R.W. Beck Project/Site: Green River Wetlands Field Investigator(s): Edwins/Klein County/City: City of Renton Plant Community: PSS/PEM Weather: clear Date: 11 /5 /91 Wetland #: 8 North Plot #: 2 VEGETATION Dominant Plant Species, Indicator Status, Stratum 1. Populus trichocarpa, FAC, shrub 2. Saliz spp., FAC-FACW, shrub 3. Typha latifolia, OBL, herbaceous 4. Phalaris arundinacae, FACW, herbaceous 5. Agrostis spp., FAC-FACW, herbaceous 6. Ranunculus repens, FACW, herbaceous 7. 8. 9. Percent of dominant species that are OBL, FACW, and/or FAC: 100% Is the hydrophytic vegetation criterion met? yes Rationale: All dominant spp. are FAC or wetter. SOILS SCS Series/Phase Snohomish silt loam SCS hydric list? yes Is the observed soil a Histosol? no Depth Matrix Mottle fLL" 8" 10YR 4/1 yes no Other hydric soil indicators: Is the hydric soil criterion met? yes Rationale: aquic regime Comments: soils are fill material; till at 12" Is the area inundated? yes Is the soil saturated? y e s Other field evidence of surface inundation Is the wetland hydrology criterion met? Rationale: saturation and inundation HYDROLOGY Depth of water: 1" Depth to water: surface or soil saturation: yes JURISDICTIONAL DETERMINATION AND RATIONALE Texture gravelly, sandy loam Is the sample plot a wetland? yes Comments: Wetland area has been graded and filled. Where there has been uneven grading, wetland has developed within the depressions. Other spp. include JUEF, PLLA, and PLMA. JONES & STOKES ASSOCIATES WETLAND DELINEATION DATA FORM ONSITE DETERMINATION FOR Client: R.W. Beck Project/Site: Black River Wetlands Field Investigator(s): Edwins/Klein County/City: City of Renton Plant Community: PEM Weather: clear Dominant Plant Species, Indicator 1. Elocharis palustris, OBL, herb 2. Juncus effusus, FACW+, herbaceous 3. 4. 5. 6. 7. 8. 9. Date: 11 /5 /91 Wetland # 8 South Plot #: 3 VEGETATION Status, Stratum Percent of dominant species that are OBL, FACW, and/or FAC: 100% Is the hydrophytic vegetation criterion met? yes Rationale: All dominant spp. are FAC or wetter. SOILS SCS Series/Phase Snohomish silt loam SCS hydric list? yes Is the observed soil a Histosol? no Depth Matrix Mottle Glev 8" 10YR 4/1 yes no Other hydric soil indicators: Is the hydric soil criterion met? yes Rationale: aquic regime Comments: soils are fill material; till at 12" HYDROLOGY Is the area inundated? yes Depth of water: 1" Is the soil saturated? yes Depth to water: surface Other field evidence of surface inundation or soil saturation: Is the wetland hydrology criterion met? yes Rationale: saturation and inundation JURISDICTIONAL DETERMINATION AND RATIONAL Texture gravelly, sandy loam Is the sample plot a wetland? yes Comments: Wetland area has previously been graded and filled. Where uneven grading has taken place, wetland has developed within the depressions. Year-round ponding in some of these areas. JONES & STOKES ASSOCIATES WETLAND DELINEATION DATA FORM ONSITE DETERMINATION FOR Client: R.W. Beck Project/Site: Black River Wetlands Field Investigator(s): Edwins/Klein County/City: City of Renton Plant Community: PFO Weather: clear Dominant Plant Species, Indicator 1. Salix spp., FAC-FACW, canopy 2. Populus trichocarpa, FAC, canopy 3. Alnus rubra , FAC, canopy 4. Corms stolonifera , FACW, shrub 5. Acer circinatum, FACU, shrub 6. 7. 8. 9. Date: 11 /5/91 Wetland # 9 Plot #: 1 VEGETATION Status, Stratum Percent of dominant species that are OBL, FACW, and/or FAC: 80% Is the hydrophytic vegetation criterion met? yes Rationale: >50% of dominant spp. are FAC or wetter. SOILS SCS Series/Phase Snohomish silt loam and Woodinville silt loam SCS hydric list? yes Is the observed soil a Histosol? no Depth Matrix Mottle G1ev 8" 10YR 4/1 yes no Other hydric soil indicators: Is the hydric soil criterion met? yes Rationale: mottles Comments: HYDROLOGY Is the area inundated? no Depth of water: Is the soil saturated? no Depth to water: Other field evidence of surface inundation or soil saturation: water marks on trees, drift logs, and algal matts Is the wetland hydrology criterion met? yes Rationale: evidence of hydrology JURISDICTIONAL DETERMINATION AND RATIONAL Texture sandy loam Is the sample plot a wetland? yes Comments: Wetland is a linear system that is connected to Springbrook Creek at the southwestern comer JONES & STOKES ASSOCIATES WETLAND DELINEATION DATA FORM ONSITE DETERMINATION FOR Client: R.W. Beck Project/Site: Black River Wetlands Field Investigator(s): Edwins/Klein County/City: City of Renton Plant Community: PFO Weather: clear Dominant Plant Species, Indicator 1. Salix spp., FAC-FACW, canopy 2. Populus trichocarpa, FAC, canopy 3. Cornus stolonifera , FACW, shrub 4. 5. 6. 7. 8. 9. Date: 11 /5 /91 Wetland # 10 Plot #: 1 VEGETATION Status, Stratum Percent of dominant species that are OBL, FACW, and/or FAC: 100% Is the hydrophytic vegetation criterion met? yes Rationale: All dominant spp. are FAC or wetter. SOILS SCS Series/Phase Snohomish silt loam and Puget silty clay loam SCS hydric list? yes Is the observed soil a Histosol? no Depth Matrix Mottle Glev Texture 12" 10YR 2/2 no no loam Other hydric soil Indicators: Is the hydric soil criterion met? yes Rationale: aquic regime Comments: HYDROLOGY Is the area inundated? yes Depth of water: 1" Is the soil saturated? yes Depth to water: surface Other field evidence of surface inundation or soil saturation: Is the wetland hydrology criterion met? yes Rationale: saturation and inundation JURISDICTIONAL DETERMINATION AND RATIONAL Is the sample plot a wetland? yes Comments: Ditch adjacent to wetland drains into Springbrook Creek; about 2 feet of water during field investigation. A beaver dam occurs in the ditch adjacent to Springbrook Creek. Phalaris arundinacae occurs occassionally in the wetland. JONES & STOKES ASSOCIATES WETLAND DELINEATION DATA FORM ONSITE DETERMINATION FOR Client: R.W. Beck Project/Site: Black River Wetlands Field Investigator(s): Edwins/Klein Date: 12/4/91 County/City: City of Renton Wetland # 11 Plant Community: PSS/PEM Plot #: 1 Weather: overcast VEGETATION Dominant Plant Species, Indicator Status, Stratum 1. Saliz spp., FAC-FACW, shrub 2. Spiraea douglasii, FACW, shrub 3. Phalaris arundinacae, FACW, herbaceous 4. 5. 6. 7. 8. 9. Percent of dominant species that are OBL, FACW, and/or FAC: 100% Is the hydrophytic vegetation criterion met? yes Rationale: All dominant spp. are FAC or wetter. SOILS SCS Series/Phase Snohomish silt loam and Woodinville silt loam SCS hydric list? yes Is the observed soil a Histosol? no Depth Matrix Mottle Olev Texture 101. IOYR 3/2 yes no silt Other hydric soil indicators: Is the hydric soil criterion met? yes Rationale: mottles Comments: HYDROLOGY Is the area inundated? no Depth of water: Is the soil saturated? yes Depth to water: surface Other field evidence of surface Inundation or soil saturation: Is the wetland hydrology criterion met? yes Rationale: saturation JURISDICTIONAL DETERMINATION AND RATIONAL Is the sample plot a wetland? yes Comments:Wetland is adjacent to Springbrook Creek. JONES & STOKES ASSOCIATES WETLAND DELINEATION DATA FORM ONSITE DETERMINATION FOR Client: R.W. Beck Project/Site: Black River Wetlands Field Investigator(s): Edwins/Klein Date: 12/4/91 County/City: City of Renton Wetland # 11 Plant Community: PEM Plot #: 2 Weather: overcast VEGETATION Dominant Plant Species, Indicator Status, Stratum 1. Typha latifolia, OBL, herbaceous 2. 3. 4. S. 6. 7. 8. 9. Percent of dominant species that are OBL, FACW, and/or FAC: 100% Is the hydrophytic vegetation criterion met? yes Rationale: All dominant spp. are FAC or wetter. SOILS SCS Series/Phase Snohomish silt loam and Woodinville silt loam SCS hydric list? yes Is the observed soil a Histosol? no Depth Matrix Mottle Glev Texture 101, 10YR 3/2 yes no silt Other hydric soil Indicators: Is the hydric soil criterion met? yes Rationale: mottles Comments: HYDROLOGY Is the area inundated? no Depth of water: Is the soil saturated? yes Depth to water: surface Other field evidence of surface inundation or soil saturation: Is the wetland hydrology criterion met? yes Rationale: saturation JURISDICTIONAL DETERMINATION AND RATIONAL Is the sample plot a wetland? yes Comments: Wetland is adjacent to Springbrook Creek. Plot was taken in the eastern portion of the wetland, which is a large PEM area. JONES & STOKES ASSOCIATES WETLAND DELINEATION DATA FORM ONSITE DETERMINATION FOR Client: R.W. Beck Project/Site: Black River Wetlands Field Investigator(s): Edwins/Klein Date: 12/4/91 County/City: City of Renton Wetland # 12 Plant Community: PSS/PEM/POW Plot #: 1 Weather: overcast VEGETATION Dominant Plant Species, Indicator Status, Stratum 1. Salix spp., FAC-FACW, shrub 2. Spiraea douglasii, FACW, shrub 3. Typha latifolia, OBL, herbaceous 4. Phalaris arundinacae, FACW, herbaceous S. 6. 7. 8. 9. Percent of dominant species that are OBL, FACW, and/or FAC: 100% Is the hydrophytic vegetation criterion met? yes Rationale: All dominant spp. are FAC or wetter. SOILS SCS Series/Phase Woodinville silt loam SCS hydric list? yes Is the observed soil a Histosol? no Depth Matrix Mottle -La Texture 101, 10YR 3/2 yes no sandy silt Other hydric soil Indicators: Is the hydric soil criterion met? yes Rationale: mottles Comments: HYDROLOGY Is the area inundated? no Depth of water: Is the soil saturated? yes Depth to water: surface Other field evidence of surface inundation or soil saturation: Is the wetland hydrology criterion met? yes Rationale: saturation JURISDICTIONAL DETERMINATION AND RATIONAL Is the sample plot a wetland? yes Comments:Wetland is adjacent to Springbrook Creek. JONES & STOKES ASSOCIATES WETLAND DELINEATION DATA FORM ONSITE DETERMINATION FOR Client: R.W. Beck Project/Site: Black River Wetlands Field Investigator(s): Edwins/Klein Date: 12/4/91 County/City: City of Renton Wetland # 13-a; Springbrook Creek Riparian Wetlands Plant Community: PEM/PSS/PFO Plot #: 1 Weather: overcast VEGETATION Dominant Plant Species, Indicator Status, Stratum 1. Populus trichocarpa, FAC, canopy 2. Salix spp., FAC-FACW, shrub 3. Spiraea douglasii, FACW, shrub 4. Phalaris arundinacae, FACW, herbaceous S. 6. 7. 8. 9. Percent of dominant species that are OBL, FACW, and/or FAC: 100% Is the hydrophytic vegetation criterion met? yes Rationale: All dominant spp. are FAC or wetter. SOILS SCS Series/Phase Puyallup fine sandy loam SCS hydric list? no Is the observed soil a Histoso►? no Depth Matrix Mottle G1ev 10" 10YR 3/3 no no Other hydric soil indicators: Is the hydric soil criterion met? no Rationale: lack of chroma Comments: HYDROLOGY Is the area inundated? no Depth of water: Is the soil saturated? yes Depth to water: 2" Other field evidence of surface inundation or soil saturation: Is the wetland hydrology criterion met? yes Rationale: saturation JURISDICTIONAL DETERMINATION AND RATIONAL Texture sandy loam Is the sample plot a wetland? yes Comments:This area has been determined as wetland in the L.C. Lee environmental assesment report. Wetland is adjacent to Springbrook Creek. JONES & STOKES ASSOCIATES WETLAND DELINEATION DATA FORM ONSITE DETERMINATION FOR Client: R.W. Beck Project/Site: Black River Wetlands Field Investigator(s): Edwins/Klein Date: 12/4/91 County/City: City of Renton Wetland # 13-c; South Marsh Wetland Plant Community: PEM/PSS/POW Plot #: 1 Weather: overcast VEGETATION Dominant Plant Species, Indicator Status, Stratum 1. Saliz spp., FAC-FACW, shrub 2. Spiraea douglasii, FACW, shrub 3. Typha latifolia, OBL, herbaceous 4. Phalaris arundinacae, FACW, herbaceous 5. 6. 7. 8. 9. Percent of dominant species that are OBL, FACW, and/or FAC: 100% Is the hydrophytic vegetation criterion met? yes Rationale: All dominant spp. are FAC or wetter. SOILS SCS Series/Phase Woodinville silt loam SCS hydric list? yes Is the observed soil a Htstosol? no Depth Matrix Mottle Glev Texture 10" 10YR 5/2 7.5 YR 4/4 no silt loam Other hydric soil indicators: Is the hydric soil criterion met? yes Rationale: mottles Comments: HYDROLOGY Is the area inundated? yes Depth of water: 3" Is the soil saturated? yes Depth to water: surface Other field evidence of surface inundation or soil saturation: Is the wetland hydrology criterion met? yes Rationale: saturation and inundation JURISDICTIONAL DETERMINATION AND RATIONAL Is the sample plot a wetland? yes Comments:This area has been determined as wetland in the L.C. Lee environmental assesment report. JONES & STOKES ASSOCIATES WETLAND DELINEATION DATA FORM ONSITE DETERMINATION FOR Client: R.W. Beck Project/Site: Black River Wetlands Field Investigator(s): Edwins/Klein Date: 11/8/91 County/City: City of Renton Wetland # 14 Plant Community: PSS Plot #: 1 Weather: rain VEGETATION Dominant Plant Species, Indicator Status, Stratum 1. Populus trichocarpa, FAC, shrub 2. Salix spp., FAC-FACW, shrub 3. Phalaris arundinacae, FACW, herbaceous 4. Agrostis spp., FAC-FACW, herbaceous 5. Juncus effusus, FACW+, herbaceous 6. Elocharis palustris, OBI, herbaceous 7. 8. 9. Percent of dominant species that are OBL, FACW, and/or FAC: 100% Is the hydrophytic vegetation criterion met? yes Rationale: All dominant spp. are FAC or wetter. SOILS SCS Series/Phase Snohomish silt loam and Woodinville silt loam SCS bydric list? yes Is the observed soil a Histosol? no Depth Matrix Mottle G1ev 0-8" N/A no no Other hydric soil indicators: Is the hydric soil criterion met? yes Rationale: aquic regime Comments: impervious till at 8" HYDROLOGY Is the area inundated? yes Depth of water: 1" Is the soil saturated? yes Depth to water: surface Other field evidence of surface Inundation or soil saturation: algal matts Is the wetland hydrology criterion met? yes Rationale: saturation and inundation JURISDICTIONAL DETERMINATION AND RATIONAL Texture fill material Is the sample plot a wetland? yes Comments: Wetland area has previously been graded and filled. Wetland has developed in depressional areas of uneven grading and where water has collected. JONES & STOKES ASSOCIATES WETLAND DELINEATION DATA FORM ONSITE DETERMINATION FOR Client: R.W. Beck Project/Site: Black River Wetlands Field Investigator(s): Edwins/Klein Date: 12/4/91 County/City: City of Renton Wetland # 16 Plant Community: PSS/PEM Plot #: 1 Weather: overcast VEGETATION Dominant Plant Species, Indicator Status, Stratum 1. Populus trichocarpa, FAC, shrub 2. Saliz spp., FAC-FACW, shrub 3. Spiraea douglasii, FACW, shrub 4. Phalaris arundinacae, FACW, herbaceous 5. 6. 7. S. 9. Percent of dominant species that are OBL, FACW, and/or FAC: 100% Is the hydrophytic vegetation criterion met? yes Rationale: All dominant spp. are FAC or wetter. SOILS SCS Series/Phase Woodinville silt loam SCS hydric list? yes Is the observed soil a Histosol? no Depth Matrix Mottle Glev Texture 101, 10YR 4/1 yes no silt Other hydric soil indicators: Is the hydric soil criterion met? yes Rationale: chroma Comments: HYDROLOGY Is the area Inundated? yes Depth of water: 3" Is the soil saturated? yes Depth to water: surface Other field evidence of surface inundation or soil saturation: Is the wetland hydrology criterion met? yes Rationale: saturation and inundation JURISDICTIONAL DETERMINATION AND RATIONAL Is the sample plot a wetland? yes Comments: Wetland is an isolated system that receives water from adjacent development and road run-off. JONES & STOKES ASSOCIATES WETLAND DELINEATION DATA FORM ONSITE DETERMINATION FOR Client: R.W. Beck Project/Site: Black River Wetlands Field Investigator(s): Edwins/Klein Date: 11/8/91 County/City: City of Renton Wetland # 32 Plant Community: PSS/PEM Plot #: 1 Weather: rain VEGETATION Dominant Plant Species, Indicator Status, Stratum 1. Juncus effusus, FACW+, herbaceous 2. 3. 4. 5. 6. 7. 8. 9. Percent of dominant species that are OBL, FACW, and/or FAC: 100% Is the hydrophytic vegetation criterion met? yes Rationale: All dominant spp. are FAC or wetter. SOILS SCS Series/Phase Woodinville silt loam SCS hydric list? yes Is the observed soil a Histosol? no Depth Matrix Mottle Glev 0-10" N/A no no Other hydric soil Indicators: Is the hydric soil criterion met? yes Rationale: aquic regime Comments: impervious till at 10". HYDROLOGY Is the area Inundated? yes Depth of water: 1" Is the soil saturated? yes Depth to water: surface Other field evidence of surface inundation or soil saturation: Is the wetland hydrology criterion met? yes Rationale: saturation and inundation JURISDICTIONAL DETERMINATION AND RATIONAL Texture fill material, mixed Is the sample plot a wetland? yes Comments: Wetland area has previously been graded and filled. Wetland has developed in depressional areas of uneven grading and where water has collected. JONES & STOKES ASSOCIATES WETLAND DELINEATION DATA FORM ONSTTE DETERMINATION FOR Client: R.W. Beck Project/Site: Black River Wetlands Field Investigator(s): Edwins/Klein Date: 11/8/91 County/City: City of Renton Wetland # 3 3 Plant Community: PSS Plot #: 1 Weather: rain VEGETATION Dominant Plant Species, Indicator Status, Stratum 1. Populus trichocarpa saplings, FAC, shrub 2. Juncus bufonius, FACW+, herbaceous 3. Phalaris arundinacae, FACW, herbaceous 4. Agrostis spp., FAC-FACW, herbaceous 5. 6. 7. 8. 9. Percent of dominant species that are OBL, FACW, and/or FAC: 100% Is the hydrophytic vegetation criterion met? yes Rationale: All dominant spp. are FAC or wetter. SOILS SCS Series/Phase Snohomish silt loam SCS hydric list? yes Is the observed soil a Histosol? no Depth Matrix Mottle G1ev 0-8" N/A no no Other hydric soil indicators: Is the hydric soil criterion met? yes Rationale: aquic regime Comments: impervious till at 8" HYDROLOGY Is the area inundated? yes Depth of water: 1" Is the soil saturated? yes Depth to water: surface Other field evidence of surface inundation or soil saturation: Is the wetland hydrology criterion met? y e s Rationale: saturation and inundation JURISDICTIONAL DETERMINATION AND RATIONAL Texture fill material Is the sample plot a wetland? yes Comments: Wetland area has previously been graded and filled. Wetland has developed in depressional areas of uneven grading and where water has collected. JONES & STOKES ASSOCIATES WETLAND DELINEATION DATA FORM ONSITE DETERMINATION FOR Client: R.W. Beck Project/Site: Black River Wetlands Field Investlgator(s): Edwins/Klein County/City: City of Renton Plant Community: PSS/PEM Weather: overcast Dominant Plant Species, Indicator 1. Alnus rubra , FAC, shrub 2. Spiraea douglasii, FACW, shrub 3. Saliz spp., FAC-FACW, shrub 4. Ranunculus repens, FACW, herbaceous S. Juncus effusus, FACW+, herbaceous 6. 7. 8. 9. Date: 12/4/91 Wetland # 37; Panther Lake Wetland Plot #: 1 VEGETATION Status, Stratum Percent of dominant species that are OBL, FACW, and/or FAC: 100% Is the hydrophytic vegetation criterion met? yes Rationale: All dominant spp. are FAC or wetter. SOILS SCS Series/Phase Seattle muck SCS hydric list? yes Is the observed soil a Histosol? no Depth Matrix Mottle G1ev N/A Other hydric soil indicators: Is the hydric soil criterion met? N/A Rationale: Comments: soils were not sampled; areas has previously been identified by King County. HYDROLOGY Is the area inundated? yes Depth of water: >2 feet Is the soil saturated? yes Depth to water: surface Other field evidence of surface inundation or soil saturation: surface Is the wetland hydrology criterion met? yes Rationale: saturation and inundation JURISDICTIONAL DETERMINATION AND RATIONAL Is the sample plot a wetland? yes Comments:Wetland has been identified in the 1981 King County Wetland Inventory. JONES & STOKES ASSOCIATES WETLAND DELINEATION DATA FORM ONSITE DETERMINATION FOR Client: R.W. Beck Project/Site: Black River Wetlands Field Invest igator(s): Edwins/Klein Date: 11/8/91 County/City: City of Renton Wetland # 40 Plant Community: PEM Plot #: 1 Weather: rain VEGETATION Dominant Plant Species, Indicator Status, Stratum 1. Populus trichocarpa, FAC, shrub 2. Agrostis spp., FAC-FACW, herbaceous 3. Juncus effusus, FACW+, herbaceous 4. 5. 6. 7. 8. 9. Percent of dominant species that are OBL, FACW, and/or FAC: 100% Is the hydrophytic vegetation criterion met? yes Rationale: All dominant spp. are FAC or wetter. SOILS SCS Series/Phase Woodinville silt loam SCS hydric list? yes Is the observed soil a Histosol? no Depth Matrix Mottle Glev 0-10" N/A no no Other hydric soil Indicators: Is the hydric soil criterion met? yes Rationale: aquic regime Comments: impervious till at 10". HYDROLOGY Is the area inundated? yes Depth of water: 1" Is the soil saturated? yes Depth to water: surface Other field evidence of surface inundation or soil saturation: Is the wetland hydrology criterion met? yes Rationale: saturation and inundation JURISDICTIONAL DETERMINATION AND RATIONAL Texture fill material, mixed Is the sample plot a wetland? yes Comments: Wetland 40 consists of five unidentified wetlands that have little vegetation. POTR occurs occassionally. These areas have previously been flagged and identified. Area has previously been graded and filled. JONES & STOKES ASSOCIATES WETLAND DELINEATION DATA FORM ONSITE DETERMINATION FOR Client: R.W. Beck Project/Site: Black River Wetlands Field Investigator(s): Edwins/Schroder Date: 4/14/92 County/City: City of Renton Wetiand # 45 Plant Community: PFO/PSS Plot #: 1 Weather: rainy VEGETATION Dominant Plant Species, Indicator Status, Stratum 1. Populus trichocarpa, FAC, canopy 2. Salix spp., FAC-FACW, shrub 3. Spiraea douglasii, FACW, shrub 4. S. 6. 7. 8. 9. Percent of dominant species that are OBL, FACW, and/or FAC: 100% Is the hydrophytic vegetation criterion met? yes Rationale: All dominant spp. are FAC or wetter. SOILS SCS Series/Phase Woodinville silt loam SCS hydric list? yes Is the observed soil a Histosol? no Depth Matrix Mottle Glev 0-10" 10YR 4/2 no no Other hydric soil indicators: Is the hydric soil criterion met? yes Rationale: aquic regime Comments: HYDROLOGY Is the area inundated? yes Depth of water: 3" Is the soil saturated? yes Depth to water: surface Other field evidence of surface inundation or soil saturation: Is the wetland hydrology criterion met? yes Rationale: saturation and inundation JURISDICTIONAL DETERMINATION AND RATIONAL Is the sample plot a wetland? yes Comments:Plot located at southern end of wetland; north of railroad tracks and wetland 3 Texture clay loam JONES & STOKES ASSOCIATES WETLAND DELINEATION DATA FORM ONSITE DETERMINATION FOR Client: R.W. Beck Project/Site: Black River Wetlands Field Investigator(s): Edwins/Schroder Date: 4/14/92 County/City: City of Renton Wetland # 45 Plant Community: PEM Plot #: 2 Weather: rainy VEGETATION Dominant Plant Species, Indicator Status, Stratum 1. Juncus effusus, FACW, herbaceous 2. Typha latifolia, OBL, herbaceous 3. Phalaris arundinacae, FACW, herbaceous 4. Ranunculus repens, FACW, herbaceous 5. 6. 7. 8. 9. Percent of dominant species that are OBL, FACW, and/or FAC: 1005'0 Is the hydrophytic vegetation criterion met? yes Rationale: All dominant spp. are FAC or wetter. SOILS SCS Series/Phase Woodinville silt loam SCS hydric list? yes Is the observed soil a Histosol? no Depth Matrix Mottle aw 0-101, 10YR 4/2 no no Other hydric soil indicators: Is the hydric soil criterion met? yes Rationale: aquic regime Comments: HYDROLOGY Is the area inundated? yes Depth of water: 1" Is the soil saturated? yes Depth to water: surface Other field evidence of surface inundation or soil saturation: Is the wetland hydrology criterion met? yes Rationale: saturation and inundation JURISDICTIONAL DETERMINATION AND RATIONAL Is the sample plot a wetland? yes Comments:Plot located in emergent area adjacent to ditch. Texture clay loam JONES & STOKES ASSOCIATES WETLAND DELINEATION DATA FORM ONSITE DETERMINATION FOR Client: R.W. Beck Project/Site: Black River Wetlands Field Invest igator(s): Edwins/Schroder Date: 4/14/92 County/City: City of Renton Wetland # 45 Plant Community: PFO/PSS Plot #: 3 Weather: clear VEGETATION Dominant Plant Species, Indicator Status, Stratum 1. Populus trichocarpa, FAC, canopy and shrub 2. Salix spp., FAC-FACW, shrub 3. Alnus rubra , FAC, shrub 4. Juncus effusus, FACW+, herbaceous 5. Phalaris arundinacae, FACW, herbaceous 6. 7. 8. 9. Percent of dominant species that are OBL, FACW, and/or FAC: 100% Is the hydrophytic vegetation criterion met? yes Rationale: All dominant spp. are FAC or wetter. SOILS SCS Series/Phase Woodinville silt loam SCS hydric list? yes Is the observed soil a Histosol? n o Depth Matrix Mottle Glev Texture 0-101, 10YR 3/2 yes no silty sand Other hydric soil indicators: Is the hydric soil criterion met? yes Rationale: chroma and mottles Comments: HYDROLOGY Is the area inundated? yes Depth of water: 3" Is the soil saturated? yes Depth to water: surface Other field evidence of surface inundation or soil saturation: Is the wetland hydrology criterion met? yes Rationale: saturation and inundation JURISDICTIONAL DETERMINATION AND RATIONAL Is the sample plot a wetland? yes Comments: JONES & STOKES ASSOCIATES WETLAND DELINEATION DATA FORM ONSITE DETERMINATION FOR Client: R.W. Beck Project/Site: Black River Wetlands Field Investigator(s): Edwins/Schroder Date: 4/14/92 County/City: City of Renton Wetland # 45 Plant Community: PSS/PEM Plot #: 4 Weather: clear VEGETATION Dominant Plant Species, Indicator Status, Stratum 1. Populus trichocarpa, FAC, canopy and shrub 2. Juncus effusus, FACW+, herbaceous 3. Phalaris arundinacae, FACW, herbaceous 4. 5. 6. 7. 8. 9. Percent of dominant species that are OBL, FACW, and/or FAC: 100% Is the hydrophytic vegetation criterion met? yes Rationale: All dominant spp. are FAC or wetter. SOILS SCS Series/Phase Woodinville silt loam SCS hydric list? yes Is the observed soil a Histosol? no Depth Matrix Mottle G1ev 0-10" 10YR 4/1 no no Other hydric soil indicators: Is the hydric soil criterion met? yes Rationale: chroma Comments: HYDROLOGY Is the area inundated? yes Depth of water: 1-3" Is the soil saturated? yes Depth to water: surface Other field evidence of surface inundation or soil saturation: Is the wetland hydrology criterion met? yes Rationale: saturation and inundation JURISDICTIONAL DETERMINATION AND RATIONAL Is the sample plot a wetland? yes Comments: Texture silty loam Appendix B. Wetland Functional Values Field Forms Wetland Functional Values Field Form City of Renton Wetland #: 3 Weather: Clear Field Investigators: Pesha Klein and Margaret Edwins 1. GROUNDWATER INTERACTION Regional groundwater: MO b.wetland is isolated:::::...............................................:........................... Comment: Surface water; water perched on fill: a. runoff 6;;Zitg2 2. FLOOD STORAGE Size of wetland: a. large is « Me; I C.small Elevation of wetland to drainage feature: Date:_ 11/05/91 a elevatton fweti iid L `'fi' nicer than drainage ditch, water c:in get into the wetland and the. wetland can provide fliod storage: b. elevation of the wetland is higher than the drainage ditch; water can not get into the wetland and the wetland cannot provide flood storage. Topography of wetland: a. level c. other BFCK/T3 BLACK RIVER 09/18/92 Comments: 3. SEDIMENT TRAPPING/WATER QUALITY Association to: ...................... ....... ................ W. '. �tf 2i#1dt ...................... ....................... ...................... b. another wetland Evidence of water movement through the wetland: a. no outlet b. sheet flow Comments: Vegetation density. a. 75-100% of wetland covered with emergent vegetation b. 50-75% of wetland covered with emergent vegetation 50°<>fvtoerei:th>mernfi<;:. etain d. 0-25% of wetland covered with emergent vegetation e. vegetation removed or altered Comments: Extent of pollutant discharge into the wetland: a. no known discharge iy rb tist. .karge C. visible discharge Source: Wetland was historically used as a battery acid dump. 4. FOOD CHAIN SUPPORT Vegetation density: a. 75-100% of wetland covered with emergent vegetation b. 50-75% of wetland covered with emergent vegetation .(ia �d e�veared................ �itegetatf d. 0-25% of wetland covered with emergent vegetation Water present: s°snaily, year-round BECKfD BLACK RIVER 09/18/92 5. WILDLIFE HABITAT Diversity. a. Very high diversity; 3 or more wetland classes, one of which is Open Water c. Medium diversity, 2 wetland classes w/out Open Water d. Low diversity; 1 wetland class Size of wetland: a. 0-5 acres t?acres .............................. .............................. .............................. c. 10-20 acres d. 20-30 acres e. over 30 acres Percent of forested wetland: Surrounding land uses: a. upland forest b. shrub or unmaintained grassland c. active agricultural/grass d. urban: residential ............ __.............................._....... e ..... r#al f ca z zt z€ l of Unique features: a. raptures nest structures .............. Presence of water: permanent, se6sozal ......I........... 6. FISHERIES HABITAT ca ►car ...................................... b. applicable Comments: BrCKfn BLACK RIVER 09/18/92 3 7. ACTIVE/PASSIVE RECREATION, HERITAGE AND EDUCATION Access to wetland: a. trail c. boat d. isolated Access on the wetland: a. trail ............. .................. c. boat d. none Environmental problems: jj" W ............ ............ ...... ........... Location to schools: Not applicable. BECK/T3 BLACK RIVER 09/18/92 4 Wetland Functional Values Field Form City of Renton Wetland #: 4 Weather: Field Investigators: Pesha Klein, Margaret Edwins 1. GROUNDWATER INTERACTION Regional groundwater: b. wetland is isolated Comment: Surface water; water perched on fill: ...................... ..................... .................................... ti>pci�2 2. FLOOD STORAGE Size of wetland: ..... b. medium c. small Date: 11/08/91 Elevation of wetland to drainage feature: a. elevation of wetland is higher than drainage ditch; water can get into the wetland and the wetland can provide flood storage. b. elevation of the wetland is higher than the drainage ditch; water can not get into the wetland and the wetland cannot provide flood storage. Topography of wetland: a. level c. other BECKn3 BLACK RrvFR 09/18/92 1 Comments: 3. SEDIMENT TRAPPING/WATER QUALITY Association to: ..................... 8 » �rem ...................... ....................... ...................... b. another wetland Evidence of water movement through the wetland: a. no outlet b. sheet flow » It ffnW ............................................ ............................................. Comments: Vegetation density. a. 75-100% of wetland covered with emergent vegetation ix5` �v ht'argeutl c. 25-50% of wetland covered with emergent vegetation d. 0-25% of wetland covered with emergent vegetation e. vegetation removed or altered Comments: Extent of pollutant discharge into the wetland: b. probable discharge c. visible discharge Source: 4. FOOD CHAIN SUPPORT Vegetation density: a. 75-100% of wetland covered with emergent vegetation ttt3- S° a nc crd vm Prrt vka C. 25-50% of wetland covered with emergent vegetation d. 0-25% of wetland covered with emergent vegetation Water present: seasonally, ........................ BECK/n BLACK RP,/M 09/18/92 2 5. WILDLIFE HABITAT Diversity. a. Very high diversity, 3 or more wetland classes, one of which is Open Water -�::......j:'4ii:j; '?:y: � iiii...,::;:: :...:: _i?::;:'i::'ryi:::;: ::'!:i:': ': ':i':i ' :.... ':?:;isi;: • : i:/ ":j:ii::i'::' ::ii :W:}':: .Ja c. Medium diversity; nd 2 wetland classes w/out Open Water d. Low diversity; 1 wetland class a. 0-5 acres b. 5-10 acres c. 10-20 acres d. 20-30 acres Percent of forested wetland: Surrounding land uses: a. upland forest b. shrub or unmaintained grassland c. active agricultural/grass ............................................... .............................................. ...................................................................................... Unique features: a. raptures nest structures b. Snags >25 feet high or <25 feet high cavity nesting birds, cavity nesting ducks w/open water, foraging for woodpeckers, small mammals, insects ................... . Presence of water eri� 2 u� . ' seasonal 6. FISHERIES HABITAT a. not applicable Com BECK/T9 BLACK RIVER 09/18/92 3 7. ACTIVE/PASSIVE RECREATION, HERITAGE AND EDUCATION Access to wetland: a. trail b roan c. boat d. isolated Access on the wetland: Environmental problems: water ..................... . . Location to schools:— Not applicable. BFCK/n BLACK RIVER 09/18/92 4 Wetland Functional Values Field Form City of Renton Wetland #: 5 Weather: Clear Field Investigators: Jon Ives and Lynn Schroder 1. GROUNDWATER INTERACTION Regional groundwater: a. inlet or outlet to the wetland such as a ditch or culvert Comment: Overland backflow from P-1 Pond. Surface water; water perched on fill: ..................... 2. FLOOD STORAGE Size of wetland: b. medium c. small Elevation of wetland to drainage feature: Date:_ 5/05/92 b. elevation of the wetland is higher than the drainage ditch; water can not get into the wetland and the wetland cannot provide flood storage. Topography of wetland: a. level b. depressional tcthr ................... ................... ................ BECKrM BLACK RNIM 09/IR/92 Comments: Comments: Vegetation density: a. 75-100% of wetland covered with emergent vegetation b. 50-75% of wetland covered with emergent vegetation c. 25-50% of wetland covered with emergent vegetation ............ ....... dxm . ........... Caci ............ X.: e. vegetation removed or altered Comments: Extent of pollutant discharge into the wetland: a. no known discharge it iprclalsharga c. visible discharge Source:. Spring -brook Creek 4. FOOD CHAIN SUPPORT Vegetation density: a. 75-100% of wetland covered with emergent vegetation b. 50-75% of wetland covered with emergent vegetation c. 25-50% of wetland covered with emergent vegetation .................... v My d. P -. ... lan Water present: ':': year-round BECK/n BLACK RP.TR 09/18/92 2 5. WILDLIFE HABITAT Diversity: a. Very high diversity-, 3 or more wetland classes, one of which is Open Water b. High diversity-, 3 wetland classes w/no Open Water or 2 wetland classes w/Open Water ... . .... . ......... ......... .. .......... nen er ................ Va"", W, 'k d. Low diversity-, 1 wetland class Size of wetland: a. 0-5 acres b. 5-10 acres d. 20-30 acres e. over 30 acres Percent of forested wetland: 6., 50-4-5 ... %**-, c. 25-50% d. 0-25% e. 0% Surrounding land uses: .............. ............. . .... ....... .............. .. ......... .. c. active agricultural grass (moderate)' d. urban: residential (poor) ....... .......... ..... Unique features: Presence of water: permanent, -sedis"O"ni'al 6. FISHERIES HABITAT a. not applicable X.x ....... ........ .. .... . ........... ............................... Comments: BECKM BLACK RIVER 09/18/92 3 7. ACTIVE/PASSIVE RECREATION, HERITAGE AND EDUCATION Access to wetland: Access on the wetland: a. trail b. road c. boat .......... .......... ............. Environmental problems: visual, air,� � ...... ............ Location to schools:— Not applicable BECK/T3 BUCK RIVER 09/18/92 4 Wetland Functional Values Field Form City of Renton Wetland #: 5a Date: 11/08/91 Weather Clear Field Investigators: Pesha Klein and Margaret Edwins 1. GROUNDWATER INTERACTION Regional groundwater: a. inlet or outlet to the wetland such as a ditch or culvert >vettarislated ................................................ ................................................ ............................................... Comment: Surface water; water perched on fill: a. runoff ................................... �ti gte ut�tt it 2. FLOOD STORAGE Size of wetland: a. large b. medium c ;ata�I ................... .................... .................. Elevation of wetland to drainage feature: a. elevation of wetland is higher than drainage ditch; water can get into the wetland and the wetland can provide flood storage. b. elevation of the wetland is higher than the drainage ditch; water can not get into the wetland and the wetland cannot provide flood storage. Topography of wetland: a. level lat gXeSSi�tlai ::..:..:.. C. other BECK/n BLACK RIVER 09/18/92 1 Comments: 3. SEDIMENT TRAPPING/WATER QUALITY Association to: a. stream b. another wetland Evidence of water movement through the wetland: b. sheet flow c. channelized flow Comments: Vegetation density: a. 75-100% of wetland covered with emergent vegetation b. 50-75% of wetland covered with emergent vegetation c. 25-50% of wetland covered with emergent vegetation . ......... WvU_ Fi re.' d covered iyuget 6 .... ... .. ............... a.a.. a on ............ ..... ....... * ...... e. vegetation removed or altered Comments: Extent of pollutant discharge into the wetland: ........... ....... ... b. probable discharge c. visible discharge Source: 4. FOOD CHAIN SUPPORT Vegetation density: a. 75-100% of wetland covered with emergent vegetation b. 50-75% of wetland covered with emergent vegetation c. 25-50% of wetland covered with emergent vegetation .......... ......... .............ettan aae .... vet , on Water present: ........... .................... year-round BECKfD BLACK RIVER 09/18/92 2 5. WILDLIFE HABITAT Diversity. a. Very high diversity, 3 or more wetland classes, one of which is Open Water b. High diversity, 3 wetland classes w/no Open Water or 2 wetland classes w/Open Water c. Medium diversity; 2 wetland classes w/out Open Water d d rsiy. ..... ct ss Size of wetland: ........................... ........................... ........................... ......................... b. 5-16 acres c. 10-20 acres d. 20-30 acres e. over 30 acres Percent of forested wetland: a. 75-100% b. 50-75% c. 25-50% d. 0-25% .............. ............... ............... ............... Surrounding land uses: a. upland forest b. shrub or unmaintained grassland c. active agricultural/grass d. urban: residential e ttzbat#.MiiusXrFaladrm�xt iJfIle Unique features: a. raptures nest structures b. Snags >25 feet high or <25 feet high cavity nesting birds, cavity nesting ducks w/open water, foraging for woodpeckers, small mammals, insects c. fallen logs: debris and duff for reptiles and amphibians d. perches: trees with dead tops, many branched trees or shrubs for small birds e. canopy cover f. other Presence of water: permanent, seasonal ..........:..:.... BECK/73 BLACK RLVER 09/18/92 7. AC-FIVE/PASSIVE RECREATION, HERITAGE AND EDUCATION Access to wetland: a. trail if X c. boat d. isolated Access on the wetland: b. road c. boat d. none Environmental problems: visual, air, noise, water Location to schools:- Not applicable BECK/n BLACK RIVER 09/18/92 4 Wetland Functional Values Field Form City of Renton Wetland #: 5b Weather:— Clear Field Investigators: Pesha Klein and Margaret Edwins 1. GROUNDWATER INTERACTION Regional groundwater: ......... h. x. .... ....... ini d" ...... * ......... M. 6.* wetland is isolated Comment: Surface water; water perched on fill: .......... ................. ...... W'::' i:' i:"j 5, d i, , mm a- t x - 6- q- ................ 2. FLOOD STORAGE Size of wetland: b. medium c. small Elevation of wetland to drainage feature: Date: 11/08/91 a. elevation of wetland is higher than drainage ditch; water can get into the wetland and the wetland can provide flood storage. b. elevation of the wetland is higher than the drainage ditch; water can not get into the wetland and the wetland cannot provide flood storage. Topography of wetland: a. level .......... c. other BECK/T3 BLACK RIVER 09/18/92 3. SEDIMENT TRAPPING JWATER QUALITY Association to: ...................... ....................... 8 rearm ...................... ....................... ...................... b. another wetland Evidence of water movement through the wetland: a. no outlet b. sheet flow rielize't ............................................ ............................................ Comments: Vegetation density: a. 75-100% of wetland covered with emergent vegetation b. 50-75% of wetland covered with emergent vegetation >< rQ `fetfr..:.�ner _ . d. 0-25% of wetland covered with emergent vegetation e. vegetation removed or altered Comments: Extent of pollutant discharge into the wetland: a. no known discharge is<pr ab;isearg ................:.:..::.....;;::..:.:::...... c. visible discharge Source: Snringbrook Creek 4. FOOD CHAIN SUPPORT Vegetation density: a. 75-100% of wetland covered with emergent vegetation b. 50-75% of wetland covered with emergent vegetation „t wa tt�vezed w�tb ergeaf gCbt d. 0-25% of wetland covered with emergent vegetation Water present: seasonally,erft BECKn3 BLACK RWER 09/18/92 2 5. WILDLIFE HABITAT Diversity. nd . '<ttne f:w d3;: s ;I # :...:A b. High diversity; 3 wetland classes w/no Open Water or 2 wetland classes w/Open Water c. Medium diversity; 2 wetland classes w/out Open Water d. Low diversity; 1 wetland class Size of wetland: a. 0-5 acres b. 5-10 acres c. 10-20 acres d. 20-30 acres Percent of forested wetland: Surrounding land uses: a. upland forest b. shrub or unmaintained grassland c. active agricultural/grass d. urban: residential u... rralf ozzzm aljf Unique features: ........................ Presence of water: pe 2 ueri; , seasonal 6. FISHERIES HABITAT a. not applicable >'aPPaii e` Comments: BECKn3 BLACK RIVER 09/19/92 3 7. ACTIVE/PASSIVE RECREATION, HERITAGE AND EDUCATION Access to wetland: a. trail .............. c. boat d. isolated Access on the wetland: a. trail b. road c. boat .................. - ........... Environmental problems: visual, air, noise, iyt Location to schools:- Not applicable BECKfD BLACK WER 09/18/92 Wetland Functional Values Field Form City of Renton Wetland #: 5c Date: 5/05/92 Weather:— Clear Field Investigators: Jon Ives and Lnn Schroder 1. GROUNDWATER INTERACTION Regional groundwater: ........... ........... ....... ......................Ve ....... ..... .............. . .. ........ . b. wetland is isolated Comment: Surface water; water perched on fill: .............. b. precipitation 2. FLOOD STORAGE Size of wetland: b. medium c. small Elevation of wetland to drainage feature: b. elevation of the wetland is higher than the drainage ditch; water can not get into the wetland and the wetland cannot provide flood storage. Topography of wetland: a. level . ............... c. other BECKM BLACK RIVER 09/18/92 Comments: 3. SEDIMENT TRAPPING/WATER QUALITY Association to: Vegetation density: a. 75-100% of wetland covered with emergent vegetation b. 50-75% of wetland covered with emergent vegetation c. 25-50% of wetland covered with emergent vegetation X: ...... . ave. id, 6da",* e. vegetation removed or altered Comments: Extent of pollutant discharge into the wetland: a. no known discharge C. visible discharge Source: Springbrook Creek 4. FOOD CHAIN SUPPORT Vegetation density: a. 75-100% of wetland covered with emergent vegetation b. 50-75% of wetland covered with emergent vegetation c. 25-50% of wetland covered with emergent vegetation ........ .. ... .... . n Water present: aesnall, year-round BECKn3 BLACK RIVER 09/18/92 5. WILDLIFE HABITAT Diversity. a. Very high diversity-, 3 or more wetland classes, one of which is Open Water b. High diversity-, 3 wetland classes w/no Open Water or 2 wetland classes w/Open Water .......... ..... ......................... W ... . .... .... . . .... . .. ...... . . . .... ... u c- ........... d. Low diversity-, 1 wetland class Size of wetland: a. 0-5 acres b. 5-10 acres ... ...... d. acres" e. over 30 acres Percent of forested wetland: a. 75-100% b. 50-75% c. 25-50% ............. ................... e. 0% Surrounding land uses: .... ........... ............... .......... c. active agricultural/grass d. urban: residential U �::: , . ................ Unique features: Presence of water: permanent, seasonal 6. FISHERIES HABITAT a. not applicable Comments: BECKM BLACK RIVER 09/18/92 7. ACTIVE/PASSIVE RECREATION, HERITAGE AND EDUCATION Access to wetland: a. trail c. boat d. isolated Access on the wetland: a. trail b. road c- boat Environmental problems: visual, air, Location to schools:— Not applicable BrCKM BLACK RIVER 09/18/92 Wetland Functional Values Field Form City of Renton Wetland #: 7 North Date: 12/04/91 Weather:__ Overcast. occasional rain. Field Investigators: Pesha Klein. Margaret Edwins 1. GROUNDWATER INTERACTION Regional groundwater: a. inlet or outlet to the wetland such as a ditch or culvert Comment: Surface water; water perched on fill: a. runoff ................................... bpi�e:;tiiz 2. FLOOD STORAGE Size of wetland: b. medium c. small Elevation of wetland to drainage feature: a. elevation of wetland is higher than drainage ditch; water can get into the wetland and the wetland can provide flood storage. b. elevation of the wetland is higher than the drainage ditch; water can not get into the wetland and the wetland cannot provide flood storage. Topography of wetland: a. level ...................... :...::..::............::::::.:..:.. C. other BECK/T3 BLACK RWER 09/18/92 1 Comments: 3. SEDIMENT TRAPPING JWATER QUALITY Association to: a. stream b. another wetland Evidence of water movement through the wetland: a�<ttt..<t.u. .... ............................ ........................... .............................. Fz<s�Qar ............................. .............................. .............................. c. channelized flow Comments: Water source to wetland is primarily groundwater and precipitation. Vegetation density: a 7t}fl<gfe%::.<ervvl ett:.::;:.;:: tafnn :::.:......:...::::. .... ...: b 50-15% of wetland covered with emergent vegetation C. 25-50% of wetland covered with emergent vegetation d. 0-25% of wetland covered with emergent vegetation e. vegetation removed or altered Comments: Extent of pollutant discharge into the wetland: b. probable discharge c. visible discharge Source: 4. FOOD CHAIN SUPPORT Vegetation density: a 7 t1(} o c t%i.. x d mer nt a#aha :........:...............::.::...........:......:......................:................::...:......::::...........::::.....:... b. 5d-t%' of wetland covered with emergent vegetation c. 25-50% of wetland covered with emergent vegetation d. 0-25% of wetland covered with emergent vegetation Water present: seasonally, WAX.m . BECK/13 BLACK RIVER 09/18/92 5. WILDLIFE HABITAT Diversity- C. Medium diversity, 2 wetland 4 d. Low diversity-, 1 wetland class Size of wetland: a. 0-5 acres b. 5-10 acres 90EXRW d. 20-30 acres e. over 30 acres Percent of forested wetland: a. 75-100% b. 50-75% c. 25-50% d. 0-25% . 4 :::.j Surrounding land uses: a. upland forest b. shrub or unmaintained grassland c. active agricultural /grass d. urban: residential : XMrnmerci ............. ..... . ....................X Unique features: out Open Water Water a. raptures nest structures b. Snags >25 feet high or <25 feet high cavity nesting birds, cavity nesting ducks w/open water, foraging for woodpeckers, small mammals, insects -amp tans ogs:duff:Tj.... .4n ............ d. perChes: trees with dead tops, rhaq:b ranchc(! (rcess or shrut-s for small belt + c. canopy covcr f. other Presence of water: ermanr nt, seasonal ................ G. FISHERIES HABITAT b. applicable Comments: BECKM BLACK RIVER 09/18/92 3 7. ACTIVE/PASSIVE RECREATION, HERITAGE AND EDUCATION Access to wetland: Access on the wetland: a. trail b. road c. boat d. none Environmental problems: t+5pa'` a0.Drs; water Location to schools: Not applicable. BBCK/T3 BUCK RIVER 09/18/92 4 Wetland Functional Values Field Form City of Renton Wetland #: 7 South Date: 11/05/91 Weather:— Clear and sunny. Field Investigators: Pesha Klein. Margaret Edwins 1. GROUNDWATER INTERACTION Regional groundwater: ... ........ .... ................ .............. ........... ... . ... . ... ... .......... ........... ........... - ........................... . ....... .................. -- ............ .... . ..... * ....... b. wetland is isolated Comment: Wetland is a 20- to 25-foot-wide ditch. Surface water; water perched on fill: ............. M. .. ................... ..................... .................. ..... .. .. . . I . ..... 2. FLOOD STORAGE Size of wetland: a. large b. medium ............ ............... Elevation of wetland to drainage feature: a. elevation of wetland is higher than drainage ditch; water can get into the wetland and the wetland can provide flood storage. b. elevation of the wetland is higher than the drainage ditch; water can not get into the wetland and the wetland cannot provide flood storage. Topography of wetland: a. level b i*! �'664*0 "'"'b W- C. other BECKn3 BLACK RIVER 09/19/92 3. SEDIMENT TRAPPING/WATER QUALITY Association to: ...................... ....................... .::.:::.:........... ...................... ...................... b. another wetland Evidence of water movement through the wetland: a. no outlet b. sheet flow ............................................ ............................................. ............................................ Comments: Water flow is south then west. eventually emptyin into n`to Spring -brook Creek. Vegetation density: a. 75-100% of wetland covered with emergent vegetation b. c SAR cued w e oaf g taba t ..........................::......:......................................:...................................................: C. 25-50% of wetland covered with emergent vegetation d. 0-25% of wetland covered with emergent vegetation e. vegetation removed or altered Comments: Extent of pollutant discharge into the wetland: ...................:,:,:.:.....:......... b. probable discharge c. visible discharge 4. FOOD CHAIN SUPPORT Vegetation density: a. 75-100% of wetland covered with emergent vegetation �.: ......... ..:......::: A:::::. b:::>::75`ii'vttariGvr : mer:..:iotsrc, .ts c. 25-50% of wetland covered with emergent vegetation d. 0-25% of wetland covered with emergent vegetation Water present: seasonally, r=tid BECKfM BLACK aLVER 09/18/92 5. WILDLIFE HABITAT Diversity: a. Very high diversity-, 3 or more wetland classes, one of which is Open Water b. High diversity-, 3 wetland classes w/no Open Water or 2 wetland classes w/Open Water .......... I. 4' ....... ...... ...... .... . d. Low diversity-, 1 wetland ciass" Size of wetland: ............. b. 5-10 acres c. 10-20 acres d. 20-30 acres e. over 30 acres Percent of forested wetland: a. 75-100% b. 50-75% c. 25-50% d. 0-25% Surrounding land uses: .......... b. shrub or unmaintained grassland c. active agricultural/grass d. urban: residential ......... .......... .... 1. ............. ... Unique features: a. raptures nest structures b. Snags >25 feet high or <25 feet high cavity nesting birds, cavity nesting ducks w/open water, foraging for woodpeckers, small mammals, insects -X Presence of water: P9 seasonal 6. FISHERIES HABITAT a. not applicable ........... ...... Comments: The hydrologic connection between this wetland and Springbrook Creek is important in maintaining water quality and fishery habitat within the creek. BECK/" BLACK RIVER 09/18/92 3 7. ACTIVE/PASSIVE RECREATION, HERITAGE AND EDUCATION Access to wetland: Access on the wetland: Environmental problems: visual, air, nuatr Location to schools: Not applicable. BrCKM BLACK RIVER 09/18/92 4 Wetland Functional Values Field Form City of Renton Wetland #: 8 North Weather:- Clear and sunny. Field Investigators: Pesha Klein. Margaret Edwins 1. GROUNDWATER INTERACTION Regional groundwater: a. uW*:att....". u'e ...t*.. o: .. b. wetland is isolated Date: 11/05/91 Comment: Inlet and outlet of wetland are culverts at eastern edge and western edize. Surface water; water perched on fill: ............ 2. FLOOD STORAGE Size of wetland: b. medium c. small Elevation of wetland to drainage feature: b. elevation of the wetland is higher than the drainage ditch; water can not get into the wetland and the wetland cannot provide flood storage. Topography of wetland: a. level c. other BECKfM BLACK RrVER 09/18/92 Comm 3. SEDIMENT TRAPPING/WATER QUALITY Association to: ................... ....................... ...................... ....................... ...................... b. another wetland Evidence of water movement through the wetland: a. no outlet ............................ 1Zi � � .. .............................. .............................. .............................. c»ier# .................................................................................................................................... Comments: Water in ditch flows west, eventually empties into Spring -brook Creek Vegetation density. a. 75-100% of wetland covered with emergent vegetation Ix Stl«75°O of zv a d etrve ed erge vegeCataan C. 25-50% of wetland covered with emergent vegetation d. 0-25% of wetland covered with emergent vegetation e. vegetation removed or altered Comments: Dense emergent getation: patchy distribution Extent of pollutant discharge into the wetland: a. no known discharge C. visible discharge Source: Spring -brook Creek. 4. FOOD CHAIN SUPPORT Vegetation density: a. 75-100% of wetland covered with emergent vegetation c. 25 50% of wetland covered with emergent vegetation d. 0-25% of wetland covered with emergent vegetation Water present: pa7f year-round BECKM BLACK RIVER 09/18/92 2 5. WILDLIFE HABITAT Diversity: a. Very high diversity; 3 or more wetland classes, one of which is Open Water b. High diversity; 3 wetland classes w/no Open Water or 2 wetland classes w/Open Water - edfum dv��ty; 2 wetland rass� wn€�t Qpn Water d Low diversity; 1- wetland class Size of wetland: a. 0-5 acres .............................. .............................. . .......................... c. 10-20 acres d. 20-30 acres e. over 30 acres Percent of forested wetland: a. 75-100% b. 50-75% c. 25-50% d. 0-25% etl°lQ .............. ............... ............... Surrounding land uses: b. shrub or unmaintained grassland c. active agricultural/grass d. urban: residential e.::>:ttrat>riiirFalrxsm id Unique features: a. raptures nest structures b. Snags >25 feet high or <25 feet high cavity nesting birds, cavity nesting ducks w/open water, foraging for woodpeckers, small mammals, insects e. canopy cover f. other ............. . Presence of water: permanent, s"easonid ........ -.......I 6. FISHERIES HABITAT a. not applicable .............................. i .................. ?I.. Comments: The association of this wetland with Springbrook Creek is important in maintaining eater quality and fishery habitat in the creek. BECKfM BLACK RIVER 09/18/92 7. ACTIVE/PASSIVE RECREATION, HERITAGE AND EDUCATION Access to wetland: >':Crail b, road ................. ................. c. boat d. isolated Access on the wetland: ................ ................ b. road c. boat d. none ....................... Environmental problems: visual, air, ii3-':ts;#�ii ....:..:....:........ Location to schools: Not applicable. BECKM BUCK RIVER 09/18/92 Q Wetland Functional Values Field Form City of Renton Wetland #: 8 South Date: 11/05/91 Weather:— Clear. sunny. Field Investigators: Pesha Klein. Margaret Edwins 1. GROUNDWATER INTERACTION Regional groundwater: a. inlet or outlet to the wetland such as a ditch or culvert Comment: Surface water; water perched on fill: a. runoff R 2. FLOOD STORAGE Size of wetland: a. large b. medium ................... ................. Elevation of wetland to drainage feature: a. elevation of wetland is higher than drainage ditch; water can get into the wetland and the wetland can provide flood storage. b. elevation of the wetland is higher than the drainage ditch; water can not get into the wetland and the wetland cannot provide flood storage. Topography of wetland: a. level c. other BECK/ M BLACK RMM 09/18/92 Com 3. SEDIMENT TRAPPING JWATER QUALITY Association to: a. stream b. another wetland Evidence of water movement through the wetland: aeX.: ............................ ........................... ........................... b. sheet flow c. channelized flow Comments: Precipitation collects in depressional areas caused by uneven grading. Wetland has developed in such areas. Vegetation density. a. 75-100% of wetland covered with emergent vegetation b. 50-75% of wetland covered with emergent vegetation d. 0-25% of wetland covered with emergent vegetation e. vegetation removed or altered Extent of pollutant discharge into the wetland: b probable discharge c. visible discharge Source: 4. FOOD CHAIN SUPPORT Vegetation density: a. 75-100% of wetland covered with emergent vegetation b. 50-75% of wetland covered with emergent vegetation :,:`a caved � �ir�ati'vivg�CaEib�o� d. 0-25% of wetland covered with emergent vegetation Water present: >yniy year-round UECK/73 BIACK RIVER 09/18/92 2 5. WILDLIFE HABITAT Diversity: a. Very high diversity; 3 or more wetland classes, one of which is Open Water b. High diversity; 3 wetland classes w/no Open Water or 2 wetland classes w/Open Water C. Gdflit?TEvr; 2 we�an� tlssss SvitIIt Qn aEca' d. Low diversity; 1 we class Size of wetland: 3 ............................ ........................... >. ..... ............................ b. 5-10 acres c. 10-20 acres d. 20-30 acres e. over 30 acres Percent of forested wetland: a. 75-100% b. 50-75% c. 25-50% d. 0-25% .............. i>fl% .............. ............... ............... Surrounding land uses: a. upland forest b. shrub or unmaintained grassland c. active agricultural/grass d. urban: residential e uZ a;:. ...........a]xfaxmal f fzti" Unique features: a. raptures nest structures b. Snags >25 feet high or <25 feet high cavity nesting birds, cavity nesting ducks w/open water, foraging for woodpeckers, small mammals, insects c. fallen logs: debris and duff for reptiles and amphibians d. perches: trees with dead tops, many branched trees or shrubs for small birds e. canopy cover f. other .................. Presence of water: permanent, sasozal .................. 6. FISHERIES HABITAT b. applicable Comments: BECKfM BLACK RIVER 09/18/92 7. ACTIVE/PASSIVE RECREATION, HERITAGE AND EDUCATION Access to wetland: a. trail .. . ............ ................. c. boat d. isolated Access on the wetland: a. trail b. road c. boat � Environmental problems: Vis"64'' air, .iWikwater............ Location to schools:— Not applicable. BECK/73 BLACK RIVER M/18/92 Wetland Functional Values Field Form City of Renton Wetland #: 9 Date: 11Z06/91 Weather:- Clear. Field Investigators: Pesha Klein. Margaret Edwins 1. GROUNDWATER INTERACTION Regional groundwater: d. ... . ........... . ... ........ b. wetland is isolated Comment: Wetland drains into Spring —brook Creek. Surface water; water perched on fill: ................. ................... ..................... 1, * M'd '9" , ti * 0", "a' 2. FLOOD STORAGE Size of wetland: a. large ............. ......................... .......................... c. small Elevation of wetland to drainage feature: a. elevation of wetland is higher than drainage ditch; water can get into the wetland and the wetland can provide flood storage. b. elevation of the wetland is higher than the drainage ditch; water can not get into the wetland and the wetland cannot provide flood storage. Topography of wetland: a. level b de"t"; W""' e"' *s"; M`— ............. c. other BECKn3 BLACK RIVER 09/18/92 Comm 3. SEDIMENT TRAPPING/WATER QUALITY Association to: ................ b. another wetland Evidence of water movement through the wetland: a. no outlet b. sheet flow c. channelized flow Comments: Outlet is at the southern tip of wetland: empties into Springbrook Creek. Vegetation density. a. 75-100% of wetland covered with emergent vegetation b. 50-75% of wetland covered with emergent vegetation c. 25-50% of wetland covered with emergent vegetation ...........S ... . ................... .......... tab.......... e. vegetation removed or altered Comments: Extent of pollutant discharge into the wetland: .... ......... b. probable discharge c. visible discharge 4. FOOD CHAIN SUPPORT Vegetation density a. 75-100% of wetland covered with emergent vegetation b. 50-75% of wetland covered with emergent vegetation c. 25-50% of wetland covered with emergent vegetation d— oz :X .... ... . .. ................ : Water present: aestniyx year-round BECK/n BLACK RIVER 09/18/92 2 5. WILDLIFE HABITAT Diversity: a. Very high diversity, 3 or more wetland classes, one of which is Open Water b. High diversity; 3 wetland classes w/no Open Water or 2 wetland classes w/Open Water ......:::::<.:.::::;:.::.:.:.;:.:::.:.::.;::.;::........:.;. ;:.;;;;::.:..........::.........:.:.. Itii fu . rs ; 2 ,.". a r .. w nut £3p n Va s~r d. Low diversity; 1 wetland class Size of wetland: ............................ ........................... ............................ b. 5-10 acres c. 10-20 acres d. 20-30 acres e. over 30 acres Percent of forested wetland: Surrounding land uses: a. upland forest tt shrub or x a g c. active agricultural/grass d. urban: residential .........:.....................................::::.:::::......:...�........... Unique features: a. raptures nest structures b. Snags >25 feet high or <25 feet high cavity nesting birds, cavity nesting ducks w/open water, foraging for woodpeckers, small mammals, insects ................ . Presence of water: permanent, s��s0�za1 6. FISHERIES HABITAT a. not applicable b'>aP�abl Comments: The association of this wetland with Spring -brook Creek is important in maintaining water purification and fishery habitat in the creek. BECKn3 BLACK RLVM 09/18/92 7. ACrIVE/PASSIVE RECREATION, HERITAGE AND EDUCATION Access to wetland: ............. .............. b. road c. boat d. isolated Access on the wetland: a. trail b. road c. boat . - �:: Environmental problems: - . air, s water ............. Location to schools:- Not applicable. BECK/73 BLACK RIVER 09/18/92 4 Wetland Functional Values Field Form City of Renton Wetland #: 10 Date: 11/06/91 Weather:— Clear. sunny. Field Investigators: Pesha Klein, Margaret Edwins 1. GROUNDWATER INTERACTION Regional groundwater: ....... .. .. :.A .. .. ... ...... .... ............ ..... .............. .... .. ...... b. wetland is isolated Comment: Ditch alony, the northern wetland edge drains into Springbrook Creek: creek may also overflow into wetland via the ditch. Surface water; water perched on fill: a. runoff b. precipitation 2. FLOOD STORAGE Size of wetland: b. medium c. small Elevation of wetland to drainage feature: b. elevation of the wetland is higher than the drainage ditch; water can not get into the wetland and the wetland cannot provide flood storage. Topography of wetland: a. level c. other BECKrr3 BLACK FUVFR 09/18/92 3. SEDIMENT TRAPPINGIWATER QUALITY Association to: ...................... ........... ...................... b. another wetland Evidence of water movement through the wetland: a. no outlet b. sheet flow .. .. .. ...... . Comments: Beaver dam at the northwestern corner of the wetland backs ut) water in the ditch along the northern wetland edge. Vegetation density. a. 75-100% of wetland covered with emergent vegetation b. 50-75% of wetland covered with emergent vegetation c. 25-50% of wetland covered with emergent vegetation :Xmer= .................. ......................................................... ...... .............. . ................. e. vegetation removed or altered Extent of pollutant discharge into the wetland: a. no known discharge ......... . TO A�f le <i Sit. &.0. C. visible discharge Source: Springbrook Creek. 4. FOOD CHAIN SUPPORT Vegetation density: a. 75-100% of wetland covered with emergent vegetation b. 50-75% of wetland covered with emergent vegetation c. 25-50% of wetland covered with emergent vegetation ........... ......... - Im . t1b ...... ...... ....... ... .. ............ 6 . ........ ....... . Water present: 4*#ft year-round BECKn3 BLACK RIVER 09/18/92 5. WILDLIFE HABITAT Diversity. a. Very high diversity, 3 or more wetland classes, one of which is Open Water b. High diversity; 3 wetland classes w/no Open Water or 2 wetland classes w/Open Water ..... :, m; v s ty; 2 weEiand g asses w o fJpen Waver d. Low diversity, 1 wetland class Size of wetland: a. 0-5 acres b. 5-10 acres ................................ >I.EEiw7�>acr�s ................................ ................................ ................................ d. 20-30 acres e. over 30 acres Percent of forested wetland: Surrounding land uses: a. upland forest b. shrub or unmaintained grassland c. active agricultural/grass d. urban: residential "dim &MAidda: Unique features: a. raptures nest structures ............... Presence of water: permanent, sea' O."' .................. 6. FISHERIES HABITAT a. not applicable ..................... .. pp.. Comments: The association of this wetland with Spring -brook Creek is important in maintaining water quality and fishery habitat in the creek. BECK/3 suck RIVER 09/18/92 3 7. ACTIVE/PASSIVE RECREATION, HERITAGE AND EDUCATION Access to wetland: ............ :.i*r , C. boat d. isolated Access on the wetland: a. trail b. road c. boat k� Environmental problems: WffAair, ibi `-*"' ` water--'-' ............. ............ Location to schools:— Not applicable. BECKIT3 BLACK RIVER 09/18/92 Wetland Functional Values Field Form City of Renton Wetland #: 11 Date: 12/04/91 Weather: Overcast, occasional rain. Field Investigators: Pesha Klein, Margaret Edwins 1. GROUNDWATER INTERACTION Regional groundwater: a. inlet or outlet to the wetland such as a ditch or culvert b. wetland is isolated Comment: Wetland is adjacent to Springbrook Creek. Surface water; water perched on fill: ...................... ..................... .................................... b pree#atiu 2. FLOOD STORAGE Size of wetland: b. medium c. small Elevation of wetland to drainage feature: a. elevation of wetland is higher than drainage ditch; water can get into the wetland and the wetland can provide flood storage. b. elevation of the wetland is higher than the drainage ditch; water can not get into the wetland and the wetland cannot provide flood storage. Topography of wetland: a. level ................................. .:........::...:.......::::::.:..:.. C. other BECKM BLACK RIVER 09/19/92 1 Comments: 3. SEDIMENT TRAPPINGJWATER QUALITY Association to: .................... ....................... ...................... ...................... ...................... b. another wetland Evidence of water movement through the wetland: a. no outlet ............................. .............................. .............................. .............................. c. channelized flow Comments: Vegetation density: a. 75-100% of wetland covered with emergent vegetation ergeui v C d c. 25-50% of wetland covered with emergent vegetation d. 0-25% of wetland covered with emergent vegetation e. vegetation removed or altered Comments: Extent of pollutant discharge into the wetland: a. no known discharge tgraa dse-arge c. visible discharge Source: Springbrook Creek. 4. FOOD CHAIN SUPPORT Vegetation density: a. 75-100% of wetland covered with emergent vegetation c. 25-50% of wetland covered with emergent vegetation d. 0-25% of wetland covered with emergent vegetation Water present: srnffX year-round BECK/73 BLACK RIVER 09/18/92 5. WILDLIFE HABITAT Diversity. a. Very high diversity; 3 or more wetland classes, one of which is Open Water b. High diversity; 3 wetland classes w/no Open Water or 2 wetland classes w/Open Water �. Metifum; t#'iv�+�, 2 �ve�iattd classes w�nat �.lpett V(Fa�s~x d Low diversity; 1 wetland class Size of wetland: a. 0-5 acres b. 5-10 acres ................................ ................................................................. ................................ d. 20-30 acres e. over 30 acres Percent of forested wetland: a. 75-100% b. 50-75% c. 25-50% d. 0-25% ............... .............. ............... ............... Surrounding land uses: a. upland forest b. shrub or unmaintained grassland c. active agricultural/grass d. urban: residential Unique features: a. raptures nest structures b. Snags >25 feet high or <25 feet high cavity nesting birds, cavity nesting ducks w/open water, foraging for woodpeckers, small mammals, insects Presence of water: permanent, sett .................: G. FISHERIES HABITAT a. not applicable hi.:': < Pl a bI Comments: The association of this wetland with Spring -brook Creek is important in maintaining, water quality and fishery habitat in the creek. BECKtn BLACK RIVER 09/18/92 7. ACTIVE/PASSIVE RECREATION, HERITAGE AND EDUCATION Access to wetland: a. trail c. boat d. isolated Access on the wetland: a. trail b. road c. boat .................. Environmental problems: ;V'�S#f air, ##M water ............ Location to schools: Not applicable. BECKn3 BLACK RIVER 09/18/92 4 Wetland Functional Values Field Form City of Renton Wetland #: 12 Weather: Field Investigators: Pesha Klein, Margaret Edwins 1. GROUNDWATER INTERACTION Regional groundwater: . .... . ............. .. ........... ffif&'. 04 *,e:: . ............................................................. .................................... . ..... . ......... .. .......... ............................ ................. I ... - ............. .................... ..... I ......... . .............................. %.................................,.............................................................. b. wetland is isolated Comment• Surface water; water perched on fill: lie>rff . ..................... ..................... .. ... ... .. .......... 2. FLOOD STORAGE Size of wetland: b. medium c. small Date: 12/04/91 Elevation of wetland to drainage feature: a. elevation of wetland is higher than drainage ditch; water can get into the wetland and the wetland can provide flood storage. b. elevation of the wetland is higher than the drainage ditch; water can not get into the wetland and the wetland cannot provide flood storage. Topography of wetland: a. level c. other BFCKM BLACK RIVER 09/18/92 Comments: 3. SEDIMENT TRAPPING/WATER QUALITY Association to: :::::::........... ....................... ...................... b. another wetland Evidence of water movement through the wetland: a. no outlet ............................ ............................. .............................. .............................. c. channelized flow Comments: Vegetation density: a 75-1ftheme.enc ve�etain. b. 50-75% of wetland covered with emergent vegetation c. 25-50% of wetland covered with emergent vegetation d. 0-25% of wetland covered with emergent vegetation e. vegetation removed or altered Comments: Extent of pollutant discharge into the wetland: a. no known discharge ............................................. ::::::...:..........:..........::::::::..:::..... C. visible discharge Source: Springbrook Creek 4. FOOD CHAIN SUPPORT Vegetation density: a 5� 0 cif w hhd eov zed ..... �xnergez�f vegetation . ........ ......... ......... .............................. b. 50-75% of wetland covered with emergent vegetation c. 25-50% of wetland covered with emergent vegetation d. 0-25% of wetland covered with emergent vegetation Water present: seasonally, yr=d BECKfM BUCK RIVER 09/18/92 2 5. WILDLIFE HABITAT Diversity: err m+�r w a3ad c ssesF csne ch f]pen V .. b. High diversity; 3 wetland classes w/no Open Water or 2 wetland classes w/Open Water c. Medium diversity; 2 wetland classes w/out Open Water d. Low diversity, 1 wetland class Size of wetland: a. 0-5 acres b. 5-10 acres c. 10-20 acres d. 20-30 acres Percent of forested wetland: Surrounding land uses: a. upland forest .........:.:.......... ................ c. active agricultural/grass d. urban: residential e. urban: industrial/commercial/filled Unique features: a. raptures nest structures b. Snags >25 feet high or <25 feet high cavity nesting birds, cavity nesting ducks w/open water, foraging for woodpeckers, small mammals, insects Presence of water: per 2irieut seasonal 6. FISHERIES HABITAT a. not applicable b ' ppH bl Comments: The association of this wetland with Springbrook Creek is important in maintaining water quality and fishery habitat within the creek. BECKM BLACK RIVER 09/I8/92 3 7. ACTIVE/PASSIVE RECREATION, HERITAGE AND EDUCATION Access to wetland: c. boat d. isolated Access on the wetland: b. road c. boat d. none Environmental problems: visual, #t 7is water Location to schools: Not applicable. BrCK/n BLACK RIVER 09/18/92 4 Wetland Functional Values Field Form City of Renton Wetland #: 13a Date: 12/04/91 Weather: Clear. Field Investigators: Pesha Klein. Margaret Edwins 1. GROUNDWATER INTERACTION Regional groundwater: fid b.....wetland is isolated:.::........................................................................... .......................................................................... Comment: Spring -brook Creek flows through the middle of the wetland. Surface water; water perched on fill: a. runoff b. precipitation 2. FLOOD STORAGE Size of wetland: a. large b. medium c_ mall ................... ................... ................... Elevation of wetland to drainage feature: a. elevation of wetland is higher than drainage ditch; water can get into the wetland and the wetland can provide flood storage. b. elevation of the wetland is higher than the drainage ditch; water can not get into the wetland and the wetland cannot provide flood storage. Topography of wetland: .................. .................. ................ b. depressional c. other BGCKfM BLACK RNTA 09/18/92 1 Comments: 3. SEDIMENT TRAPPING/WATER QUALITY Association to: ...................... ....................... ..........:......... ...................... ...................... ...................... b. another wetland Evidence of water movement through the wetland: a. no outlet b. sheet flow Comments: Vegetation density. a. 75-100% of wetland covered with emergent vegetation b. 50-75% of wetland covered with emergent vegetation 5.;;::cfvtc?ver<vvihee::n:»:;.: eta►lc�n ....... d. 0-25% of wetland covered with emergent vegetation e. vegetation removed or altered Comments: Extent of pollutant discharge into the wetland: a. no known discharge pia �scge C. visible discharge Source:_ Snringbrook Creek 4. FOOD CHAIN SUPPORT Vegetation density: a. 75-100% of wetland covered with emergent vegetation b. 50-75% of wetland covered with emergent vegetation d. 0-25% of wetland covered with emergent vegetation Water present: seasonally, y i "* BECKrM BUCK RIVER 09/19/92 2 5. WILDLIFE HABITAT Diversity: a. Very high diversity-, 3 or more wetland classes, one of which is Open Water b. . High diversity-, 3 wetland classes w/no Open Water or 2 wetland classes w/Open Water . . . . ... ....... ..... ......... rw. . . ... ...afer .......... ...... .. . ..... d. Low diversity-, I wetland class Size of wetland: .. ........ ... ........... - " * acres ' '" b. 51s c. 10-20 acres d. 20-30 acres e. over 30 acres Percent of forested wetland: a. 75-100% b. 50-75% c. 25-50% d. 0-25% Surrounding land uses: a. upland forest Er>.. ..... . c. active agricultural/grass d. urban: residential e. urban: industrial/commercial/filled Unique features: a. raptures nest structures b. Snags >25 feet high or <25 feet high cavity nesting birds, cavity nesting ducks w/open water, foraging for woodpeckers, small mammals, insects c. fallen logs: debris and duff for reptiles and amphibians d. perches: trees with dead tops, many branched trees or shrubs for small birds .......... - ..... f. other Presence of water: perm "' fit seasonal 6. FISHERIES HABITAT a. not applicable ................ Comments: Spring -brook Creek supports fish habitat. BECKrr3 BLACK RIVER 09/19/92 3 7. ACTIVE/PASSIVE RECREATION, HERITAGE AND EDUCATION Access to wetland: a. trail : r 6W v.... .. .................. .................. c. boat d. isolated Access on the wetland: a. trail b. road c. boat Environmental problems: visual, air, noise, water Location to schools:- Not applicable, BECK/-M BLACK RIVER 09/18/92 Wetland Functional Values Field Form City of Renton Wetland #: 13B Date: 12/04/91 Weather:— Clear Field Investigators: Pesha Klein and Margaret Edwins 1. GROUNDWATER INTERACTION Regional groundwater: b .............. .......... . .......... x . . . . ...... b. wetland is isolated Comment: Surface water; water perched on fill: .............. ..................... .............. 2. FLOOD STORAGE Size of wetland: a. large c. small Elevation of wetland to drainage feature: b. elevation of the wetland is higher than the drainage ditch; water can not get into the wetland and the wetland cannot provide flood storage. Topography of wetland: a. level ...... ..... ....... . . .... ................................... c. other BECKM BLACK RIVER 09/18/92 Comments: 3. SEDIMENT TRAPPING/WATER QUALITY Association to: ...................... ....................... ...................... b. another wetland Evidence of water movement through the wetland: a. no outlet b. sheet flow Comments: Vegetation density: a. 75-100% of wetland covered with emergent vegetation b5 t ova ct}vzd wxtbergeetat3on ....... ......... ................. ...... c. 25-50% of wetland covered with emergent vegetation d. 0-25% of wetland covered with emergent vegetation e. vegetation removed or altered Comments: Extent of pollutant discharge into the wetland: `t g b. probable discharge c. visible discharge Source: 4. FOOD CHAIN SUPPORT Vegetation density: a. 75-100% of wetland covered with emergent vegetation Rio c ....::::.....:.: �a�r red ► _; :: get.:: c c. 25-50% of wetland covered with emergent vegetation d. 0-25% of wetland covered with emergent vegetation Water present: setisoria[ty, year-round BGCKn3 BLACK RIVER 09/18/92 2 5. WILDLIFE HABITAT Diversity. a. Very high diversity, 3 or more wetland classes, one of which is Open Water b. High diversity; 3 wetland classes w/no Open Water or 2 wetland classes w/Open Water c. Medium diversity; 2 wetland classes w/out Open Water Size of wetland: a. 0-5 acres b. 5-10 acres .................................. .................................. ................................... .................................. d. 20-30 acres e. over 30 acres Percent of forested wetland: Surrounding land uses: a. upland forest b. shrub or unmaintained grassland jgrass d. urban: residential e. urban: industrial/commercial/filled Unique features: a. raptures nest structures b. Snags >25 feet high or <25 feet high cavity nesting birds, cavity nesting ducks w/open water, foraging for woodpeckers, small mammals, insects c. fallen logs: debris and duff for reptiles and amphibians d. perches: trees with dead tops, many branched trees or shrubs for small birds e. canopy cover f. other Presence of water: permanent, seso .................. 6. FISHERIES HABITAT a. not applicable .............................. Comments: Adjacent to Spring -brook Creek drainage from wetlands into Springbrook. sECKn3 BACK RIVER 09/18/92 3 7. ACTIVE/PASSIVE RECREATION, HERITAGE AND EDUCATION Access to wetland: b. road c. boat d. isolated Access on the wetland: b. road c. boat d. none Environmental problems: W'S'44 air, '6"4"Wwater Location to schools:- Not applicable 13FCKn3 BIACIC RIVER 09/18/92 4 Wetland Functional Values Field Form City of Renton Wetland #: 13c Weather: Field Investigators: Pesha Klein, Margaret Edwins 1. GROUNDWATER INTERACTION Regional groundwater: a. inlet or outlet to the wetland such as a ditch or culvert b. wetland is isolated Comment: Wetland is adjacent to Spring -brook Creek. Surface water; water perched on fill: ........... X:::--.-:r4n-* .. ............... ....... ..... 2. FLOOD STORAGE Size of wetland: .... .... X.X.: b. medium c. small Elevation of wetland to drainage feature: Date: 12/04/91 a. elevation of wetland is higher than drainage ditch; water can get into the wetland and the wetland can provide flood storage. b. elevation of the wetland is higher than the drainage ditch; water can not get into the wetland and the wetland cannot provide flood storage. Topography of wetland: a. level C. other BECK/73 BLACK RP.FM 09/18/92 3. SEDIMENT TRAPPING/WATER QUALITY Association to: a. stream b. another wetland Evidence of water movement through the wetland: a. no outlet ............................. ............................. .............................. .............................. c. channelized flow Comments: Vegetation density: a > v t cr ver �h: ems::::.:. to nz# $. .. .. b. 50-15% of wetland covered with emergent vegetation c. 25-50% of wetland covered with emergent vegetation d. 0-25% of wetland covered with emergent vegetation e. vegetation removed or altered Extent of pollutant discharge into the wetland: .. ................................................... b. probable discharge c. visible discharge 4. FOOD CHAIN SUPPORT Vegetation density: xacedzergege cctaf�oa b. 50-75% of wetland covered with emergent vegetation c. 25-50% of wetland covered with emergent vegetation d. 0-25% of wetland covered with emergent vegetation Water present: seasonally, jr-nr BECKfD BLACK RIVER 09/18/92 5. WILDLIFE HABITAT Diversity: . ....................... ............ ........... ................... b. High diversity-, 3 wetland classes w/no Open Water or 2 wetland classes w/Open Water c. Medium diversity-, 2 wetland classes w/out Open Water d. Low diversity-, 1 wetland class Size of wetland: a. 0-5 acres ...................... . . ........... ..... . ............ C. es d. 20-30 acres e. over 30 acres Percent of forested wetland: a. 75-100% b. 50-75% c. 25-50% d. 0-25% Surrounding land uses: a. upland forest b. shrub or unmaintained grassland c. active agricultural/grass d. urban: residential e. urban: industrial/commercial/filled Unique features: a. raptures nest structures b. Snags >25 feet high or <25 feet high cavity nesting birds, cavity nesting ducks w/open water, foraging for woodpeckers, small mammals, insects c. fallen logs: debris and duff for reptiles and amphibians f. other Presence of water: "t*'M"""A""'h""*d*iit'seasonal 6. FISHERIES HABITAT ................ '.,#pp._.ca p ............... ............... ........... .................................... b. applicable BECK/n BLACK RWM 09/18/92 3 Comments• 7. ACTIVE/PASSIVE RECREATION, HERITAGE AND EDUCATION Access to wetland: ::XAM ................. c. boat d. isolated Access on the wetland: P.off, b. road c. boat d. none Environmental problems: vista." as water Location to schools:— Not applicable. BrCK/T3 BLACK RIVER 09/18/92 4 Wetland Functional Values Field Form City of Renton Wetland #: 16 Weather: —Clear, Field Investigators: Pesha Klein. Margaret Edwins 1. GROUNDWATER INTERACTION Regional groundwater: a. inlet or outlet to the wetland such as a ditch or culvert f:;;Wvid>isslae ................................................ ................................................ Comment: Surface water; water perched on fill: ...................... ..................... .................................... i> pxetz 2. FLOOD STORAGE Size of wetland: a. large .................. . b > zni .UM .......................... ......................... .......................... c. small Elevation of wetland to drainage feature: Date: 12/04/91 a. elevation of wetland is higher than drainage ditch; water can get into the wetland and the wetland can provide flood storage. b. elevation of the wetland is higher than the drainage ditch; water can not get into the wetland and the wetland cannot provide flood storage. Topography of wetland: a. level ................................ b ;gza .:.:.............................. c. other BECK/13 BLACK RIVER 09/18/92 1 Comments: 3. SEDIMENT TRAPPING/WATER QUALITY Association to: a. stream b. another wetland Evidence of water movement through the wetland: a pt na�u ............................ ........................... ............................. .............................. .............................. c. channelized flow Comments: Vegetation density: a. 75-100% of wetland covered with emergent vegetation b. 50-75% of wetland covered with emergent vegetation c. 25-50% of wetland covered with emergent vegetation d cci waitzerut zCatu e. vegetation removed or altered Comments: Extent of pollutant discharge into the wetland: b. probable discharge c. visible discharge Source: 4. FOOD CHAIN SUPPORT Vegetation density: a. 75-100% of wetland covered with emergent vegetation b. 50-75% of wetland covered with emergent vegetation c. 25-50% of wetland covered with emergent vegetation >::d>t3r ' <vvC}s>etmer';;;:rizue 'eta "on € - %v p.... Stan..,: ...:� Water present: aenaiiy, year-round BECKfM BtwCK RIVER 09/18/92 5. WILDLIFE HABITAT Diversity: a. Very high diversity-, 3 or more wetland classes, one of which is Open Water b. High diversity-, 3 wetland classes w/no Open Water or 2 wetland classes w/Open Water . .... ...................Wafer .. . ...... ....... d. Low diversity-, 1 wetland class Size of wetland: b. 5-10 acres c. 10-20 acres d. 20-30 acres e. over 30 acres Percent of forested wetland: a. 75-100% b. 50-75% c. 25-50% d. 0-25% Surrounding land uses: a. upland forest b. shrub or unmaintained grassland c. active agricultural/grass d. urban: residential Unique features: a. raptures nest structures b. Snags >25 feet high or <25 feet high cavity nesting birds, cavity nesting ducks w/open water, foraging for woodpeckers, small mammals, insects ........... Presence of water: permanent, . as . 0 . nal BECK/T3 BLACK RIVER 09/18/92 7. ACTIVE/PASSIVE RECREATION, HERITAGE AND EDUCATION Access to wetland: a. trail c. boat d. isolated Access on the wetland: a. trail b. road c. boat Environmental problems: V s i o. water Location to schools: Not applicable. BECK/13 BLACK RIVER 09/18/92 Wetland Functional Values Field Form City of Renton Wetland #: 22 Weather: Clear Field Investigators:_ Bob Denman and Margaret Edwins 1. GROUNDWATER INTERACTION Regional groundwater: a. ud �5tttlet ib tho wetanci� snci� as a .ife cuivef ......................... b. wetland is isolated Comment: The wetland area has previously been graded and filled. Surface water; water perched on fill: a. runoff ................................... iiprrp%ttazs 2. FLOOD STORAGE Size of wetland: a. large >z eT a .......................... c. small Elevation of wetland to drainage feature: Date: 6/04/92 a. elevation of wetland is higher than drainage ditch; water can get into the wetland and the wetland can provide flood storage. Topography of wetland: a `':levee .................. b. depressional c. other BECKM BLACK RIVER 09/18/92 Comments: 3. SEDIMENT TRAPPING/WATER QUALITY Association to: a. stream Evidence of water movement through the wetland: a. no outlet b. sheet flow c. channelized flow Comments: Vegetation density. a. 75-100% of wetland covered with emergent vegetation b. 50-75% of wetland covered with emergent vegetation c. 25-50% of wetland covered with emergent vegetation MW . ........ . ..M ...* ........... .... ...... . .. ........... "M 5.99'u ....... . e. vegetation removed or altered Comments: Extent of pollutant discharge into the wetland: a. no known discharge .... .. .. ...... c. visible discharge Source:- Via the ditch, which is connected with wetland 3 (Orilla Pond) 4. FOOD CHAIN SUPPORT Vegetation density: a. 75-100% of wetland covered with emergent vegetation b. 50-75% of wetland covered with emergent vegetation c. 25-50% of wetland covered with emergent vegetation X.M. ... ar.`* Water present: 000W year-round BECK/T3 BLACK RIVER 09/18/92 2 5. WILDLIFE HABITAT Diversity: a. Very high diversity, 3 or more wetland classes, one of which is Open Water b. High diversity; 3 wetland classes w/no Open Water or 2 wetland classes w/Open Water '':><::<;«::. � �� and �V�Lltlt tt .er d. Low diversity, 1 wetland class Size of wetland: a. 0-5 acres b. 5-10 acres OMW d. 20-30 acres e. over 30 acres Percent of forested wetland: a. 75-100% b. 50-75% ........................ d. 0-25% e. 0% Surrounding land uses: a. upland forest c. active agricultural/grass d. urban: residential '�t3t��pGt<�ts�'f2tT ;Ct3:tbirtCa�`�;:f[. lC ....................................... Unique features: a. raptures nest structures b. Snags >25 feet high or <25 feet high cavity nesting birds, cavity nesting ducks w/open water, foraging for woodpeckers, small mammals, insects c. fallen logs: debris and duff for reptiles and amphibians d rchcs: trees v-ith dead tops, ruany brwiched try "'rihrubft' oi'sm br e. canopy cover f. other Presence of water: permanent, S�fi#1i .................. 6. FISHERIES HABITAT b. applicable Comments: 6ECKM BACK RIVER 09/18/92 7. ACTIVE/PASSIVE RECREATION, HERITAGE AND EDUCATION Access to wetland: a. trail c. boat d. isolated Access on the wetland: a. trail b3ma: C. at d. none Environmental problems: visual, air, noise, va Location to schools:- Not applicable BFCKM BUCK RIVER 09/18/92 4 Wetland Functional Values Field Form City of Renton Wetland #: 32 & 33 Date: 11/08/91 Weather: Rain consistently throughout the day. Field Investigators: Pesha Klein, Margaret Edwins 1. GROUNDWATER INTERACTION Regional groundwater: a. inlet or outlet to the wetland such as a ditch or culvert l €s'latect ........................................... ............................................. Comment: Surface water; water perched on fill: ;3>1? ...................... ..................... .................................... ozi P.:::;.. 2. FLOOD STORAGE Size of wetland: a. large b. medium C` ``SITl3� .................... ................... .................... Elevation of wetland to drainage feature: a. elevation of wetland is higher than drainage ditch; water can get into the wetland and the wetland can provide flood storage. b. elevation of the wetland is higher than the drainage ditch; water can not get into the wetland and the wetland cannot provide flood storage. Topography of wetland: a. level t ` t px ri; C. other BECK/ M BLACK RIVER 09/19/92 1 Comments: 3. SEDIMENT TRAPPING/WATER QUALITY Association to: a. stream b. another wetland Evidence of water movement through the wetland: > c� e ............................ ........................... ........................... b. sheet flow c. channelized flow Comments: Vegetation density: a. 75-100% of wetland covered with emergent vegetation b. 50-75% of wetland covered with emergent vegetation c. 25-50% of wetland covered with emergent vegetation �taf e. vegetation removed or altered Comments: Extent of pollutant discharge into the wetland: WXX f t .......:::.::............ b. probable discharge c. visible discharge Source: 4. FOOD CHAIN SUPPORT Vegetation density: a. 75-100% of wetland covered with emergent vegetation b. 50-75% of wetland covered with emergent vegetation c. 25-50% of wetland covered with emergent vegetation With Water present: saaiX year-round ...:.........:.... ........................ BECK/13 BUCK RIVER 09/18/92 2 5. WILDLIFE HABITAT Diversity. a. Very high diversity, 3 or more wetland classes, one of which is Open Water b. High diversity; 3 wetland classes w/no Open Water or 2 wetland classes w/Open Water c. Medium diversity; 2 wetland classes w/out Open Water z tx fi rs #y <I -W Mass Size of wetland: .......................... ........................... ........................... ......................... b. 540 acres c. 10-20 acres d. 20-30 acres e. over 30 acres Percent of forested wetland: Surrounding land uses: a. upland forest b. shrub or ur maintained grassland c. active agricultural/grass d. urban: residential Unique features: a. raptures nest structures b. Snags >25 feet high or <25 feet high cavity nesting birds, cavity nesting ducks w/open water, foraging for woodpeckers, small mammals, insects c. fallen logs: debris and duff for reptiles and amphibians d. perches: trees with dead tops, many branched trees or shrubs for small birds e. canopy cover f. other Presence of water: permanent, seaso40 .................. 6. FISHERIES HABITAT ` �. t .. ........ b. applicable Comments: BECK/n BUCK RIVER 09/18/92 3 7. ACTIVE/PASSIVE RECREATION, HERITAGE AND EDUCATION Access to wetland: a. trail .......... .................. c. boat d. isolated Access on the wetland: a. trail b. road c. boat it, iW Environmental problems: water .................................... Location to schools:- Not applicable. BrCK/n BACK RIVER 09/18/92 4 Wetland Functional Values Field Form City of Renton Wetland #: 37 Weather:— Overcast. occasional rain. Field Investigators: Pesha Klein. Margaret Edwins 1. GROUNDWATER INTERACTION Regional groundwater: .............. - ............... ... .. ............... ................. .............................. 6.* ..... wetland i-s"i,s,ol*a't*e'*'d"*******'*** ........... ............. ..... . . Date: 12/04/91 Comment: Associated with Panther Lake. Panther Creek channel is the outlet for the lake. Surface water; water perched on fill: .................... ..................... ... ........ ............ ................................... 2. FLOOD STORAGE Size of wetland: b. medium c. small Elevation of wetland to drainage feature: a. elevation of wetland is higher than drainage ditch; water can get into the wetland and the wetland can provide flood storage. b. elevation of the wetland is higher than the drainage ditch; water can not get into the wetland and the wetland cannot provide flood storage. Topography of wetland: a. level b. �d 6"b": r""': is c. other BECK/T3 BLACK RIVER 09/18/92 Comments: 3. SEDIMENT TRAPPING/WATER QUALITY Association to: � '• ' `L40 ...................... b. another wetland Evidence of water movement through the wetland: a. no outlet bshe�t flrn ............................ .............................. ............................. c charinehz ifou ......... Comments: Vegetation density: 1 t�f t d covered u7th eriergent v'v�g�fia� t b 50-75 0 of wetland covered with emergent vegetation c. 25-50% of wetland covered with emergent vegetation d. 0-25% of wetland covered with emergent vegetation e. vegetation removed or altered Comments: Extent of pollutant discharge into the wetland: b. probable discharge c. visible discharge Source: 4. FOOD CHAIN SUPPORT Vegetation density: ...........:...:: ...:.i:j!%. i:V Y T: v:i':i:tivi:; :'�TiiT: U. a. d t1 3 : ! }v d # #; m f tli ta... b. 50-75% of wetland covered with emergent vegetation c. 25-50% of wetland covered with emergent vegetation d. 0-25% of wetland covered with emergent vegetation Water present: seasonally, ytjrd BGCKM BLACK RWER 09/18/92 5. WILDLIFE HABITAT Diversity: . .. . .. ... .............................. .. .. ...... ....... .?ajc�k !w 0 ():�IC .. ......... ...... en Wafer . ..... ...... ... X ..................................... ........ . ........... b. High diversity-, 3 wetland classes w/no Open Water or 2 wetland classes w/Open Water c. Medium diversity-, 2 wetland classes w/out Open Water d. Low diversity-, 1 wetland class Size of wetland: a. 0-5 acres b. 5-10 acres c. 10-20 acres d. 20-30 acres Percent of forested wetland: a. 75-100% b. 50-75% c. 25-50% d. 0-25% .................. .............. Surrounding land uses: b. shrub or unmaintained grassland c. active agricultural/grass durra TOMleita e. urban: industrial/commercial/filled Unique features: a. raptures nest structures b. Snags >25 feet high or <25 feet high cavity nesting birds, cavity nesting ducks w/open water, foraging for woodpeckers, small mammals, insects c. fallen logs: debris and duff for reptiles and amphibians Presence of water: pera2uet seasonal 6. FISHERIES HABITAT a. not applicable Comments: Emerizent portions of the wetland inundated by the lake provide rearing and cover areas. BECKM BLACK RIVER 09/18/92 3 7. ACTIVE/PASSIVE RECREATION, HERITAGE AND EDUCATION Access to wetland: a. trail ................. .................. c. boat d. isolated Access on the wetland: Environmental problems: a "lik noise water Location to schools:— Not applicable, BECKn3 BLACK RIVER 09/18/92 4 Wetland Functional Values Field Form City of Renton Wetland #: 40 Date: 11/08/91 Weather: Overcast. Field Investigators: Pesha Klein. Margaret Edwins 1. GROUNDWATER INTERACTION Regional groundwater: a. inlet or outlet to the wetland such as a ditch or culvert b wet�ncli:i.clat ................................................ ................................................ Comment: Surface water; water perched on fill: ar ...................... ..................... ..................... > : e 'i .. P.....:: ...I...:....... 2. FLOOD STORAGE Size of wetland: a. large b. medium e small .................... ................... .................... Elevation of wetland to drainage feature: a. elevation of wetland is higher than drainage ditch; water can get into the wetland and the wetland can provide flood storage. b. elevation of the wetland is higher than the drainage ditch; water can not get into the wetland and the wetland cannot provide flood storage. Topography of wetland: a. level :.....:.:::..........::.:.:.:..:.. c. other BECKrM BLACK RIVER 09/18/92 1 Comments: 3. SEDIMENT TRAPPINGJWATER QUALITY Association to: a. stream b. another wetland Evidence of water movement through the wetland: El P3 ........................... .......... ............... b. sheet flow c. charmelized flow Comments: Vegetation density: a. 75-100% of wetland covered with emergent vegetation b. 50-75% of wetland covered with emergent vegetation ..................... .... ... . ...... .... . ...... . .. ..................... :..,) . ...... .. ........ ............................ . . . . . ... ...... d 0 -25 % ., of wetland covered with emergent vegetation e. vegetation removed or altered Comments: Extent of pollutant discharge into the wetland: ........... X. ........... b. probable discharge c. visible discharge Source: 4. FOOD CHAIN SUPPORT Vegetation density: a. 75-100% of wetland covered with emergent vegetation b. 50-75% of wetland covered with emergent vegetation c. . ............................ .... . .... . vd- t 6 X ::. me . Ne ..... 94, . ............. ............ ..... . . .. ................. ...... .... .... *"* d. 0-25% of wetland covered with emergent vegetation Water present: year-round ........... ............... .. BECKn3 BLACK RrVER 09/18/92 2 5. WILDLIFE HABITAT Diversity: a. Very high diversity; 3 or more wetland classes, one of which is Open Water b. High diversity; 3 wetland classes w/no Open Water or 2 wetland classes w/Open Water c. Medium diversity; 2 wetland classes w/out Open Water _....._ ._ ............ .... .......................................................................... Size of wetland: Percent of forested wetland: a. 75-100% b. 50-75% c. 25-50% d. 0-25% ............... ............... ............... Surrounding land uses: a. upland forest b. shrub or unmaintained grassland c. active agricultural/grass d. urban: residential ............:..........:.:.....::.:::. ....:.:........:::.:::. .::::...... Unique features: a. raptures nest structures b. Snags >25 feet high or <25 feet high cavity nesting birds, cavity nesting ducks w/open water, foraging for woodpeckers, small mammals, insects c. fallen logs: debris and duff for reptiles and amphibians d. perches: trees with dead tops, many branched trees or shrubs for small birds e. canopy cover f. other .........-:..... Presence of water: permanent, s . so .W ...:...::....:.... 6. FISHERIES HABITAT a� .ct;app�c.�e b. applicable Comments: BECKjn BLACK RIVER 09/18/92 7. ACTIVE/PASSIVE RECREATION, HERITAGE AND EDUCATION Access to wetland: a. trail c. boat d. isolated Access on the wetland: a. trail b. road c. boat ... ......... .................. Environmental problems: EI air, WN4 water ............ Location to schools:— Not applicable. BECKM BLACK RIVER 09/18/92 Wetland Functional Values Field Form City of Renton Wetland #: 45 Date: 4Z14/92 Weather:— Overcast Field Investigators: Margaret Edwins and Lynn Schroder 1. GROUNDWATER INTERACTION Regional groundwater: b. wetland is isolated Comment: A north -south ditch connects wetland 45 with wetland 3 and wetland 22. Surface water; water perched on fill: a. runoff ........... 2. FLOOD STORAGE Size of wetland: b. medium c. small Elevation of wetland to drainage feature: a. elevation of wetland is higher than drainage ditch; water can get into the wetland and the wetland can provide flood storage. acx can nit get into the wetland and the Topography of wetland: b. depressional c. other BECKn3 BACK RIVER 09/18/92 Comments: 3. SEDIMENT TRAPPING/WATER QUALITY Association to: a. stream Evidence of water movement through the wetland: a. no outlet b. sheet flow c>ainelize�' fiat ................................. ......................... Comm Vegetation density. a. 75-100% of wetland covered with emergent vegetation b. 50-75% of wetland covered with emergent vegetation S0 t? vsret v CEO .,t3f A" d. 0-25% of wetland covered with emergent vegetation e. vegetation removed or altered Comments: Extent of pollutant discharge into the wetland: a. no known discharge <pr b"b (] se rge c. visible discharge Source: Wetland 3 via the ditch 4. FOOD CHAIN SUPPORT Vegetation density: a. 75-100% of wetland covered with emergent vegetation b. 50-75% of wetland covered with emergent vegetation AnAl ::: ::}'::Y'.:_:ti:>:ii:i:}:::::ii:i ";;iiii:•:.. .:::::i:: "fv:::i! d. 0-25% of wetland covered with emergent vegetation Water present: seasriali, year-round BECK/n BLACK RIVER 09/18/92 2 5. WILDLIFE HABITAT Diversity. a. Very high diversity, 3 or more wetland classes, one of which is Open Water Ht dzvers�ty; 3 syeClatid sses wJno' pe�:t t aY x z r 2 wa' clasks w f Qpe '4� ' c. Medium diversity; 2 wetland classes w/out Open Water d. Low diversity, 1 wetland class Size of wetland: a. 0-5 acres b. 5-10 acres OM 1M d. 20-30 acres e. over 30 acres Percent of forested wetland: a. 75-100% b. 50-75% iw`:a{k d. 0-25%':: e. 0% Surrounding land uses: a. upland forest c. active agricultural/grass d. urban: residential ....................................... Unique features: a. raptures nest structures b. Snags >25 feet high or <25 feet high cavity nesting birds, cavity nesting ducks w/open water, foraging for woodpeckers, small mammals, insects c fatten to '. dchris and sluff for rcls$tie� �d atripfi'Lbiari> d. perchca: trees with dead tops, many brtinchc:d trees or ~Drubs f6r sinall birds c. catiopy cr f. other Presence of water: permanent, seasonal 6. FISHERIES HABITAT b. applicable Com s6cKrM suck RIVER 09/18/92 3 7. ACTIVE/PASSIVE RECREATION, HERITAGE AND EDUCATION Access to wetland: OR b. road c. boat d. isolated Access on the wetland: a. trail b. road c. boat Environmental problems: visual, Location to schools: Not applicable 6ECK/T3 BLACK RIVER 09/18/92 ", 'G rr r IL L E