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Home My WebLink AboutWWP272109 (19)Wetland Delineation Report HIGATE SEWAGE LIFT STATION ELIMINATION Renton, Washington Prepared for AGRA Earth & Environmental 11335 NE 122nd Way, Suite 100 Kirkland, Washington 98034-6918 (206) 820-4669 and City of Renton 200 Mill Avenue South Renton, Washington 98055 (206) 277-6179 Prepared by ENTRANCO 10900 NE 8th Street, Suite 300 Bellevue, Washington 98004 (206) 454-5600 December 1996 CONTENTS Page INTRODUCTION 1 BACKGROUND 1 FIELD INVESTIGATION METHODOLOGY 1 FIELD INVESTIGATION 8 Field Data Results 10 Wetland Delineation Results 14 POTENTIAL WETLAND IMPACTS During Construction 14 During Operation 15 CONCEPTUAL MITIGATION 15 REFERENCES Published Documents 16 APPENDIX A - Wetland Map from Original Alignment B - Wetland Map from Surrounding Property C - Growing Season Table D - Completed Data Forms E - Earthen Trench Plug 1 96038 / Report / Wetlands (12/18196) / jc FIGURES Page 1. Project Vicinity 2 2. Proposed New Sewer Line Corridor 3 3. NWI Wetlands in the Project Area 4 4 City Inventory Wetlands in the Project Area 5 5. Wetland Delineation Map 9 TABLES Page 1. Plant Status and Chance of Growing in a Wetland 6 2. Soils in the Project Area 7 96038 / Report / Wetlands (12/18196) / jc INTRODUCTION This wetlands investigation is for the proposed Higate Sewer Lift Station Elimination project, which is located in Section 5, Township 23 North, Range 5 East, W.M., and in the City of Renton (figure 1). The proposed new buried sewer line would be located in the northeastern quadrant of the intersection of Jones Avenue NE and NE 20th Street along a 15-foot-wide utility easement (figure 2). The investigation was performed to identify and to delineate the jurisdictional boundary of wetlands within 65 feet of the utility easement. BACKGROUND Two previous wetland studies have been conducted in the project vicinity. These studies were reviewed prior to conducting the current field investigation. The first study ' was prepared for the original alignment for proposed new sewer line (the original alignment was approximately 120 feet west of the current alignment along NE 20th Street). The results from this investigation indicated wetlands were along only the immediate creek channel and around the existing excavated pond (Appendix A, Phelps 1993). The second investigation was conducted for a private land owner who owns much of the property the proposed new sewer line will cross. The results from this investigation indicated that the wetlands extend across much of the creek valley (Appendix B, David Evans & Associates 1994). ' Maps from both the U.S. Fish and Wildlife Service National Wetland Inventory (USFWS NWI) and the City of Renton also were examined to see if these government agencies 1 had identified any wetlands as occurring in the project vicinity. The NWI map (USFWS 1988) indicates a seasonally flooded, palustrine (freshwater) scrub -shrub wetland (PSSC, Cowardin et al 1979) in the project area (figure 3). This site corresponds to the blueberry farm immediately south of NE 20th Street and the existing sewage lift ' station (which is to be eliminated). The City of Renton's wetland map (Renton 1992) indicates a wetland in the same area, but shows the wetland extending north of NE 20th Street (figure 4). FIELD INVESTIGATION METHODOLOGY The wetland investigation was conducted using the "Routine On -site Determination ' Method" described in the Corps of Engineers Wetlands Delineation Manual (Environmental Laboratory 1987), as modified (Corps 1991 and 1992). For jurisdictional purposes, wetlands are defined by the U.S. Army Corps of Engineers ' (Corps) and Environmental Protection Agency (EPA) (Federal Register 1982 and 1980) as: 96038 1 Report / Wetlands (12118196) / jc u L u SCALE 1:24000 0 1 MILE `o a � 1000 0 1000 2000 3000 4000 5000 6000 7000 FEET c 3 1 .5 0 1 KILOMETER CONTOUR INTERVAL 25 FEET m NATIONAL GEODETIC VERTICAL DATUM OF 1929 Higate. Sewage Lift. S.tation,..-*;-,Wetfan.d-- Delinez 430 E N T R A N C O :WASHINGTON QUADRANGLE LOCATION Figure 1 Project Vicinity 0 I cy N \ \J ' N 0 _ OV I lW > l G �p I ti { n «7�. uT4L1'rY M I � - U f i d N84. 29E I � � 1 h 1 lot 3 h . �01,0 19 ✓8 24 E lot 4 3o i54 3 I for 00 �; ,Jse -Ic •I•aE isS.D3 i H w 0 i6S 3 N m m E N T R A N C O /siG vTi��rY E«sr1 HuT NE 20th Street Figure 2 Proposed New Sewer Line Corridor m m � m = = = m n m Z D Z 0 96038.60 Higate Sewer Wetlands Report (9/10/96) AGT 1 L J N i i . t �O? i S—g V-3 W 2 S -13 'GTO1V In .. . ,. 1 �> S-18 J S 17 W3K r-2 W 1 V) L, 111-{•yr' U LO , > w — 17 cfl \N 1 K W & K 1 S26K -\� IW-47 k '\\^(Z\ C, ) -- I / W-23 S28K 6 S-10 - N.E:27TH STREET L W 29 Q iS_ 1 1 NE 20th Street PROJECT LOCATIO \ FIGURE #3 CITY OF RENTON 1 I I WETLANDS INVENTORY MAP HAMMOND. COLLIER 3 WADE - LIVINGSTONE ASSOCIATES. INC. ' 4m E N T R A N C O I i L Figure 4 City Inventory Wetlands in the Project Area r] "Those areas that are inundated or saturated by surface or ground water at a frequency and duration sufficient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions. Wetlands generally include swamps, marshes, bogs, and similar areas." The presence of the three essential wetland characteristics (i.e., wetland vegetation, soils, and hydrology) were examined by looking for positive indicators of each characteristic. Examination for wetland (hydrophytic) vegetation is done within different plant communities (i.e., communities that are composed of significantly different species of plants). Each plant community along the suspected wetland/non-wetland boundary is identified and described and a data point is selected in each different plant community. Plant species are identified around that data point for each different stratum (e.g., tree, sapling, shrub, and herb). The sampling area around the data point is a 30-foot radius for the tree stratum and a 5-foot radius for the sapling, shrub, and herb strata. Through visual estimating, the plants are given a percentage of coverage in each stratum sampling area. The dominant plants in each stratum are determined by selecting plants which have a coverage of 20 percent for each stratum. These plants are included on the list of dominant species. Plant species were identified using the Flora of the Pacific Northwest (Hitchcock and Cronquist 1973). Plants were further identified as to the estimated probability of their chance of occurring in wetland and non -wetland environments, based on the National List of Plant Species That Occur in Wetlands (Reed 1988a, 1988b, and 1993 and Corps 1994) as shown in table 1. Table 1 Plant Status and Chance of Growing in a Wetland Indicator Categories Symbol Estimated Probability Obligate Wetland OBL >99% Facultative Wetland FACW 67%-99% Facultative FAC 34%-66% Facultative Upland FACU 1 %-33% Obligate Upland UPL <1% The dominant species and their indicator category for all strata are combined together to determine if the identified dominant vegetation meets the criteria that wetland plants 96038 / Report / Wetlands (12118196) / jc 6 comprise most of the plant community. In general, the criteria to meet the wetland vegetation requirements occurs when the dominant plants that have an OBL, FACW, and/or FAC indicator (see table 1) account for more than 50 percent of the total list of dominant species. When this "greater than 50 percent" threshold occurs, the data point is said to have a positive presence of wetland vegetation. In addition to the percent coverage method, there are other indicators for identifying wetland vegetation. If the plants are observed to be growing under saturated or inundated conditions during the growing season, regardless of the indicator status, the plants should be considered as acting like wetland plants. Morphological, physiological, and reproductive adaptation, and evidence from technical literature also are used to determine if the plant is acting as wetland vegetation. If there is strong evidence of these other indicators, the plant community should be said to have a positive presence of wetland vegetation. Examination for wetland (hydric) soils starts by digging a pit at the data point and assessing the soil characteristics. Indicators for hydric soils include: (1) organic soils; (2) histic epipedons; (3) sulfidic materials; (4) aquic or peraquic moisture regimes; (5) direct observation of reducing soil conditions; (6) gleyed, low chroma, and low chroma/ mottled mineral soils; (7) soils on the local or national hydric soils list (note: care must be taken here so as not to include remnant hydric soils); (8) iron and manganese concretions; and (9) coarse textured or sandy hydric soils that have high organic matter content in the surface margin, dark vertical streaks of organic matter in subsurface horizons, or an organic pan (i.e., wet spodosol, an organic layer "floating" underground at the water table). Mineral soils were examined using the Munsell Soil Color Charts (Kollmorgen 1988) and the soil characteristics of the project area were reviewed with the Soil Survey King County, Washington and King County Area Hydric Soils List (USDA Soil Conservation Service 1973 and 1989) for hydric soil indicators (table 2 and Appendix B). Soils with a hydric inclusion are soils that, for mapping purposes and constraints, can have small patches of wetland soils (hydric soils) included in the soil area. Table 2 Soils in the Project Area Soil Hydric Sym. Soil Name Slope Hydric Inclusion Inc Indianola loamy fine sand 4-15% no no Sm Shalcar muck 0-1 % yes n/a 960381 Report I Wetlands (12118196) / jc Examination for wetland hydrology starts by visually scanning across the site and in the soil pit, to check for indicators of wetland hydrology. These primary field indicators, in descending order of reliability, include: (1) visual observation of inundation; (2) visual observation of soil saturation in the upper 12 inches; (3) water marks; (4) drift lines; (5) water -borne sediment deposits; and (6) wetland drainage patterns. Secondary field indicators include evidence of: (1) oxidized root channels (rhizospheres) associated with living roots and rhizomes in the upper 12 inches; (2) water stained leaves; (3) local soil survey data; and (4) FAC-neutral test (note: Corps approval is required to use this test). The manual further defines the jurisdictional timing and duration of inundation and soil saturation to meet the hydrology criteria. Non -tidal areas that have a duration of inundation and/or soil saturation greater or equal to 5 percent of the growing season may have wetland hydrology. Sites with 12.5 percent or greater duration of the growing season are considered to have a positive presence for wetland hydrology. The growing season is defined as surface temperatures greater than 28 degrees Fahrenheit, for at least 50 percent of the year. The growing season for the site was determined as being 253 days long based on the USDA Soil Conservation Service ' (now the Natural Resources Conservation Service) Soil Survey for King County Area, Washington (USDA SCS 1973) (Appendix C). The 5 and 12.5 percentages translate into roughly 13 and 32 days, respectively. FIELD INVESTIGATION The field investigation was conducted on August 7 and 8, 1996. The weather during the field investigation was sunny and hot. Since the field examination occurred during the driest time of the year, professional judgment was used in some cases, to determine the presence of wetland hydrology. Nine data points were located on the site to look for positive indicators of the three essential wetland characteristics: wetland (hydrophytic) vegetation, wetland (hydric) soils, and wetland hydrology. Data gathered was used to determine the boundary of the project wetland. These data points correspond to the soil pits (SP) and were numbered SP1 through SP9 on pink survey flagging. Cross ditches over the utility easement were also labeled and flagged with pink survey tape. The data points are shown on figure 5, the completed data forms are attached as Appendix D. Soils colors were taken from wet samples unless noted otherwise. 96038 / Report / Wetlands (12/18/96) / jc 8 I I I I I I I I Sewer Construction Easement .__ 50' VIETLAND BUFFER -- resin ,ne t �Y � I a V, 3 ago / lips U) 20 Ix ------------- ............. _rX_ —,_ a ; .... . ................ 7 ----- ..... .. ......... ........ . ........... ...... ...... AL . .......... --------- rlV� .................... W ..... ......... .. ....... Ir CL (D 0_1 W_ A K -�M WETLAND s FI tj 24 P/L cc Pond CL WETLAND ifto- CL coin) WEILA"D APFA nLLUD rOO 9NrtE rAMILY 1KNiSE SIZE A yp NON --WE I LAND w _r__ ...... . ................. .......... %wW E. w] .......... ...... , ............. ..... ..... . ... ...... ........ .... ................. ------ - --- Hlgate Creek w -mb Single -Family! Residences Blueberry Farm r_ Legend I vpl} 0' Wetland Buffer 4) SP-1 soil Pit 0 G�miC I C*j W AA1-1 -- ---- z Wetland Flag 'R5 A 'Y%Y Jones Avenue HE __w Delineated Wetland Boundary ?N S.Vcr _w Approximate Wetland Boundary K�� !Il------�+ 50' Buffer Zone 3 (D H igate Sewage lift.- Statio h.l,. Wetland Delineation Report. Figures 430 ENTRANCO Wetland Delineation Map I Field Data Results . Data Point 1. The data point is located in roughly the mid -point along the north/south leg of the new sewer line corridor, and in a scrub -shrub plant community dominated by ' hardhack (Spiraea douglash), lady fern (Athyrium filix-femina), giant horsetail (Equisetum telmateia), and Himalayan blackberry (Rubus procera). These plants together indicate the presence of hydrophytic vegetation. ' A soil pit (SP1) was dug to a depth of 12 inches to look for positive indicators of hydric soils and wetland hydrology. Although the soil was organic (a hydric soil indicator), the ' soil color was still examined. The soil was determined to be a 10YR 2/1 color throughout the core. With the organic soil, hydric soils were considered to be present. The soil pit was saturated to the surface and free standing water was 6 inches below the surface. The wetland hydrology characteristic was considered to be present. I This data point was determined to be a wetland since all three essential wetland requirements were met. ' Data Point 2. The data point is located south of Data Point 1 up a small knoll, and is in a scrub -shrub plant community dominated by Himalayan blackberry, giant horsetail, and hedge bindweed (Convolvulus sepium). Although not listed as a wetland plant, the blackberry is known to be a vigorous grower in seasonally flooded wetlands. In this case, the blackberry was considered to be acting as a wetland plant, based on the ' shallow water table. The positive presence of hydrophytic vegetation was assumed. A soil pit (SP2) was dug to a depth of 15 inches to look for positive indicators of hydric ' soils and wetland hydrology. The soil was organic (a hydric soil indicator) in the upper 6 inches and mineral below this. The soil color was examined in the sandy mineral soil and was determined to be a 10YR 3/2 color. A strong sulfidic odor was also present in the soil. With the 6-inch organic soil layer (histic epipedon) over the saturated sandy soil, hydric soils were considered to be present. The soil pit was saturated at 12 inches and free standing water occurred 15 inches below the surface. The typical groundwater level was assumed to be much higher at the beginning of the growing season (March). The wetland hydrology characteristic ' was considered to be present. This data point was determined to be a wetland since all three essential wetland ' requirements were met. Data Point 3. The data point is located west of Data Point 1, up on a slight mound. The data point is in a plant community dominated by red alder (Alnus rubra), giant horsetail, and Himalayan blackberry. These plants together indicate the presence of hydrophytic vegetation. 1 96038 1 Report / Wetlands (12/18/96) / jc 10 A soil pit (SP3) was dug to a depth of 18 inches to look for positive indicators of hydric soils and wetland hydrology. The soil has an organic layer (a hydric soil indicator) in the top 12 inches and a mineral soil below. The silty textured mineral soil was determined to be a 10YR 3/1, with mottles of a 10YR 4/4 color. With the organic soil layer (histic epipedon) over the low chroma, silty mineral soil, hydric soils were considered to be present. No water or saturation was observed in the soil pit. But due to the proximity and shallow elevation change from the surrounding area determined to be a wetland, the soil pit would be expected to be saturated within 12 inches of the surface, at the beginning of the growing season, for a sufficient duration to meet the jurisdictional hydrology requirements. The wetland hydrology characteristic was assumed to be present. ■ This data point was determined to be a wetland since all three essential wetland requirements were met. ' Data Point 4. The data point is in a disturbed plant community (i.e., front yard of a house and maintained as a lawn) just north of NE 20th Street, and is dominated by creeping buttercup (Ranunculus repens), velvet grass (Holcus lanatus), horsetail (Equisetum sp., likely telmateia), and unidentifiable grasses (due to the mowing). These plants together indicate the presence of hydrophytic vegetation. A soil pit (SP4) was dug to a depth of 12 inches to look for positive indicators of hydric soils and wetland hydrology. Although the soil was organic throughout the core (a hydric soil indicator), the soil color was still examined. The soil was determined to be a 10YR 2/1 color in the upper 12 inches and 7.5YR 2/0 below that point in the core. With the organic soil, hydric soils were considered to be present. The soil pit was saturated to 4 inches from the surface and free standing water ■ occurred 6 inches below the surface. The wetland hydrology characteristic was considered to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. Data Point 5. The data point is located north of Data Point 1, next to a fallen and grown over barn. The data point is in a scrub -shrub plant community dominated by reed canarygrass (Phalaris arundinacea), giant horsetail, and Himalayan blackberry. These plants together indicate the presence of hydrophytic vegetation. A soil pit (SP5) was dug to a depth of 18 inches to look for positive indicators of hydric ' soils and wetland hydrology. Although the upper part of the soil was organic (a hydric soil indicator), the soil color was still examined for the mineral soil below. The soil was determined to be a 10YR 3/2 color (dry) in the sandy/mucky soil from 0 to 7 inches. From 7 to 14 inches, the sandy loamy soil was determined to be a 10YR 5/2 color with 96038 / Report / Wetlands (12/18/96) / is 11 n abundant mottles of both 7.5YR 4/4 and 7.5YR 5/6 colors. Below 14 inches, the soil was a 10YR 5/2 color with mainly 10YR 5/6 colored mottles. With the low chroma, mottled mineral soil, hydric soils were considered to be present. The soil pit was saturated to a depth of 14 inches below the surface, however, free standing water was not observed in the soil pit. Based on the depth of saturation (i.e., close to 12 inches below the surface) and time of year during the field investigation, the wetland hydrology characteristic was assumed to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. Data Point 6. The data point is just upslope to the north of Data Point 5 and is in a scrub -shrub plant community dominated by Himalayan blackberry, which by itself, does not indicate the presence of hydrophytic vegetation. A soil pit (SP6) was dug to a depth of 24 inches to look for positive indicators of hydric soils and wetland hydrology. The sandy mineral soil was determined to be a 10YR 3/2 color, with no mottles, from 0 to 10 inches deep, 10YR 4/4 from 10 to 24 inches deep, and 10YR 5/4, with some slight soil discoloration noticeable. With no hydric indicators observed in the mineral soils, hydric soils were not considered to be present. No indicators of wetland hydrology was observed in the soil pit or surrounding area. The wetland hydrology characteristic was not considered to be present. This data point was determined not to be a wetland since none of the essential wetland requirements were met. Data Point 7. The data point is located on the northern portion of the project, along the east/west leg of the new sewer line corridor in a scrub -shrub plant community dominated by Himalayan blackberry, giant horsetail, hardhack, and red alder. These plants together indicate the presence of hydrophytic vegetation. A soil pit (SP7) was dug to a depth of 24 inches to look for positive indicators of hydric soils and wetland hydrology. The sandy mineral soil was determined to be a 10YR 3/1 (dry) color to 10 inches deep, and a 10YR 6/2 (dry) color, with abundant 7.5YR 4/6 mottles from 10 to 24 inches deep. With the low chroma, mottled mineral soil, hydric soils were considered to be present. No inundation or saturation was observed in the soil pit during the field investigation. However, based on the proximity and relative location in the topography to the creek, the site would likely have sufficient water during the beginning of the growing season to meet the hydrology criteria. With this in mind, the wetland hydrology characteristic was assumed to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. 1 96038 / Report / Wetlands (12/18/96) / jc 12 Data Point 8. The data point is located upslope from Data Point 7, and is in a scrub - shrub plant community dominated by Himalayan blackberry, salmonberry (Rubus spectabilis), and red alder. These plants together indicate the presence of hydrophytic vegetation. A soil pit (SP8) was dug to a depth of 24 inches to look for positive indicators of hydric soils and wetland hydrology. All soil colors were determined using dry samples. The sandy mineral soil was determined to be a 10YR 2/1 color from 0 to 9 inches deep, 10YR 6/2.5, with very slight 10YR 5/6 mottles from 9 to 18 inches deep, and 10YR 6/2, with strong 10YR 4/6 mottles from 18 to 24 inches deep. Although slight, the mottling in the low chroma mineral soil appear sufficient to meet the wetland soils criteria. Hydric soils were considered to be present. No indicators of wetland hydrology were observed in the soil pit or surrounding area. Based on the proximity and higher elevation relative to the creek, the site would likely not have sufficient water during the beginning of the growing season to meet the hydrology criteria. The wetland hydrology characteristic was not considered to be present. ' This data point was determined not to be a wetland since only two of the essential wetland requirements were met. ' Data Point 9. The data point is located in the field (likely old pasture) north of the new sewer line corridor and west of the creek. The data point is in an emergent plant ' community dominated by reed canarygrass, giant horsetail, soft rush (Juncus effusus), creeping buttercup, and quackgrass (Agropyron repens). These plants together indicate the presence of hydrophytic vegetation. ' A soil pit (SP9) was dug to a depth of 18 inches to look for positive indicators of hydric soils and wetland hydrology. All soil colors were determined using dry samples. The sandy mineral soil was determined to be a 10YR 3/2 color, with no mottles, from 0 to 9 inches deep, and a 10YR 5/2 color, with both 10YR 5/6 and 7.5YR 4/4 colored mottles from 9 though 18 inches deep. With the mottled, low chroma mineral soil, hydric soils ' were considered to be present. No inundation or saturation was observed in the soil pit during the field investigation. ' However, based on the proximity and position in the landscape relative to the creek, the site would likely have sufficient water during the beginning of the growing season to meet the hydrology criteria. With this in mind, the wetland hydrology characteristic was assumed to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. 1 96038 / Report / Wetlands (12118/96) / jc 13 Wetland Delineation Results The wetland was flagged with blue survey tape and marked as assessment area AA-1 through AA-12 with in the project corridor. The wetland boundary outside of the corridor was visually estimated. The wetland is directly connected to the creek corridor tand is fed by surrounding seeps in several locations. The entire wetland is estimated to be roughly 5-8 acres in size. Though historically used as a pasture, and now ' overgrown with blackberry and red alder, the wetland would meet the criteria as a Category 2, High Quality Wetlands, since the site is a headwater wetland (Renton 1992b). Category 2 wetlands require a standard buffer of 50 feet. The disturbed portion of the wetland (i.e., residence next to NE 20th Street), would, by itself, meet the criteria as a Category 3, Lower Quality Wetlands. This is based on the presence of fill for the house and garages. Category 3 wetlands require a standard buffer of 25 feet. However, since this area is connected to the main portion of the wetland, this disturbed area also would be considered a Category 2 wetland with a 50- foot buffer. The creek would have a buffer of 25 feet. Any activity in the wetlands may require permits from federal, state and city resource agencies. These permits may include: Permit/Approval/Review Resource Agency Section 404, Nationwide Permit U.S. Army Corps of Engineers Water Quality Modification Washington State Department of Ecology Hydraulic Project Approval (HPA) Washington State Department of Fish and Wildlife SEPA Review Wetland Permit City of Renton City of Renton POTENTIAL WETLAND IMPACTS Based on the most current plan set (11/1/95), the impacts to the wetland were estimated for activities during construction and during operation. Cumulative and secondary impacts are not addressed in this report, since the project details are not completed. Cumulative and secondary impacts, however, should be considered and included as part of the wetland mitigation plan preparation. During Construction Impacts during construction are those which may temporarily affect the wetland's vegetation, soils, and hydrology. The project utility corridor is 15 feet wide and the 96038 1 Report I wetlands (12Jie/96) i ic 14 construction easement corridor is approximately 15 feet wide. Construction for the new sewer line would likely affect all the wetlands in these corridors. The 30-foot-wide construction corridor would impact roughly 13,350 square feet of wetlands. The construction also would impact 6,600 square feet of wetland buffer area. Material storage is expected to occur outside of the wetlands. During Operation Impacts during operation are those which may permanently affect the wetland's vegetation, soils, and hydrology. No permanent impacts are anticipated for the proposed project. CONCEPTUAL MITIGATION As with impacts, mitigation can be for temporary impacts (construction) and permanent ' impacts (operation). Typically, temporary impacts to wetlands can be mitigated by restoring the site after construction. However, mitigation criteria set at the beginning of construction can minimize the impacts and aid in the wetlands recovery. Mitigation for temporary impacts, in no particular order, may include: • narrow the construction corridor to minimize the amounts of wetlands disturbed • protect large trees in the corridor and wetlands out of the corridor, with clearing limit fencing • cut the vegetation to leave short stems and roots for rapid regrowth • use log mats or geotech fabric and hogfuel to limit soil disruption • stockpile surplus soils away from wetlands • use earthen trench plugs periodically to avoid "piping" along new sewer line (refer to a typical detail in Appendix E). • maintain subsurface cross water flow, by using either a drainage blanket or pipes • discharge water pumped out of the construction trench to points outside of wetlands, possibly using the current sewer system, or do not drain the trench and "work in the wet" • construct only during dry weather and within the HPA fisheries window • separate and bypass flowing water in the ditches and creek from the construction trench 1 1 96038 / Report / Wetlands (12118/96) / jc 15 reuse existing hydric soils and reshape the landscape to pre -construction conditions • revegetate the disturbed wetland and buffer with native plant species. maintain and monitor the revegetated areas to assure adequate establishment of the native vegetation Mitigation for permanent impacts may need to follow the criteria in the Wetland Management Ordinance (Renton 1992b) to compensate for any permanent loss of wetlands. Mitigation can be creation of new wetlands from upland areas or restoration of degraded wetland areas. In case there were to be impacts to the wetlands, the Category 2, scrub -shrub wetlands permanently affected would need to be compensated at a 2:1 ratio. Wetland buffers permanently lost also would require mitigation. If needed, a potential mitigation site could be the reed canarygrass dominated wetland plant community along the new sewer line corridor. This site is located just north of the lot along NE 20th Street. Mitigation at this location could be in the form of a wetlands restoration effort. If permanent impacts were to occur, a mitigation report and plan would need to be created when specific impacts are determined. A mitigation report would contain the environmental goals and objectives, performance standards, wetland construction plans, monitoring plans, and a contingency plan for the mitigation effort. However, with no permanent impacts anticipated for the project, no creation mitigation for replacement wetlands is expected. ' REFERENCES Published Documents Adamus, Paul R., Ellis J. Clairain, R. Daniel Smith and Richard E. Young 1987 Wetland Evaluation Technique (WET); Volume II: Methodology, Operational Draft Technical Report Y-87-_, U.S. Army Corps of Engineers Waterways Experiment Station, Vicksburg, MS. Cowardin, Lewis M., Virginia Carter, Francis C. Golet and Edward T. LaRoe 1979 Classification of Wetlands and Deepwater Habitats of the United States. Prepared for the Office of Biological Services, Fish and Wildlife Services, U.S. Department of Interior, Washington DC, FWS/OBS-79/31. David Evans and Associates 1994 Wetland Delineation Letter. Prepared for private landowner. 1 96038 / Report / Wetlands (12/18/96) / is 16 Environmental Laboratory 1987 Corps of Engineers Wetland Delineation Manual (1987 Manual). Technical Report Y-87-1, U.S. Army Engineers Waterways Experiment Station, Vicksburg, Mississippi. rFederal Register 1991 33 CFR Part 330: Nationwide Permit Program Regulations and Issue, Reissue, and Modify Nationwide Permits; Final Rule. Part III Department of Defense, Corps of Engineers, Department of the Army, Vol. 56, No. 226, US Government Printing Office, Washington, D.C. November 22. ' 1982 Title 33: Navigation and Navigable Waters; Chapter Il, Regulatory Programs Corps of Engineers., Vol. 47, No. 138, p. 31810, US Government Printing Office, Washington, D.C. 1980 40 CFR Part 230: Section 404(b)(1) Guidelines for Specification if Disposal Sites for Dredged or Fill Material, Vol. 45, No. 249, pp. 85352-85353, US Government Printing Office, Washington, D.C. Hitchcock, Leo C. and Arthur Cronquist 1973 Flora of the Pacific Northwest: An Illustrated Manual. University of Washington Press. 1990 edition. Kollmorgen Instruments Corporation 1988 Munsell Soil Color Charts. Baltimore, MD. Kunze, Linda M. 1987 Puget Trough Freshwater Wetlands, A summary of Biologically Significant ' Sites, Phase II: Southern Puget Trough Impounded Wetlands. Washington Natural Heritage Program. Prepared for the Washington State Department of Ecology. Phelps, Marilyn (Cascade Environmental Services) 1993 Wetland Delineation Report. Prepared for City of Renton. Puget Sound Water Quality Authority (PSWQA) 1994 Puget Sound Water Quality Management Plan Reed, Porter B., Jr. 1993 1993 Supplement to the List of Plant Species that Occur in Wetlands: Northwest (Region 9). U.S. Fish and Wildlife Service. 1988a National List of Plant Species that Occur in Wetlands: National Summary. U.S. Fish and Wildlife Service, Biological Report 88(24). 1988b National List of Plant Species that Occur in Wetlands: Northwest (Region 9). U.S. Fish and Wildlife Service, Biological Report 88(26.9). 96038 / Report / Wetlands (12/18/96) / jc 17 Renton, City of 1992 Critical Areas Inventory Maps. Prepared with assistance from Jones and Stokes, and R.W. Beck. 1992b Wetland Management Ordinance. Chapter 32. ' U.S. Fish and Wildlife Service 1988 Mercer Island Quadrangle, National Wetland Inventory. ' U.S. Army Corps of Engineers (Corps) ' 1994 1993 Supplement to National List of Plant Species that Occur in Wetlands: Northwest (Region 9). March 31. 1992 Clarification and Interpretation of the 1987 Manual. Guidance 1 memorandum. March 6. 1991 Questions & Answers on 1987 Corps of Engineers Manual. Guidance memorandum. October 7. 1990 Permit Requirements for Wetland Fill Projects. Information Paper. Seattle District. April 17. USDA Forest Service 1985 Management of Wildlife and Fish Habitats in Forests of Western Oregon and Washington, Part 1 - Chapter Narratives. Pacific Northwest Region. Published in cooperation with the U.S. Department of the Interior, Bureau of ' Land Management. USDA Soil Conservation Service 1989 King County Area Hydric Soil List. 1973 Soil Survey of King County Area Washington. fl Washington Natural Heritage Program (NHP) 1994 Endangered, threatened and sensitive vascular plants of Washington. Department of Natural Resources, Olympia. Washington State Department of Ecology 1993 Wetland Rating System. 96038 / Report / Wetlands (12/1B/96) / jc 18 APPENDIX A Wetland Map from Original Alignment I I I1, n t t t .1121 WETLAND #2 AREA ADJACENT J 0 1104 .150 TO EXISTING 112 POND 'Cm 204 24' 25 7 113! lag 209 ?=25Z7L* ZE r 21?2 - u 106 258 269 In lei lip iiJ 'A 16 lz f4*& ):tA% A To 183 271 220 'As 23234_Z� '13. '\' 2 226 304 R to. y '21t 4 T.'Q 225 2m LL -0 273 SCALE 1 80 FEET CA 20 d 2 7 11 LIT 13; 317 LARGE PASTURE .21 WETLAND #3 263 SMALL DITCH TRIBUTARY TO%,,�,,!.. 3 CREEK J24 • , X&L . 325 5m 503 PLAP S Arms 5w r Lu (320 A2II W p'.f .179 > o-rxfT WETLAND #1 R ( ' I 0 131 (II EAST BANK OF CREEK, 5w NORTH OF -POHL RESIDENCE 33� 0 KAY RESIDENCE 371 370 31 373 374 372 1 35 DR. KAY"S PROPERTY 3, 364 (3. 363 xi I laws. 431 " r 3w 35922 3't" �"440 N. E 20TH STREET IV 4 .34j- —364.. 29 ;;= rIaL 95 FIGURE #4 425 197 PROJECT AREA „a SURVEY MAP EXISTING BERRY FARM HAM MOND, COLLIER & WADE LIVINGSTONE ASSO C I A T E S, IN C. Lq z tLi U) uj z 0 44 APPENDIX B Wetland Map from Surrounding Property ..._................ L`, \ I .�x(v- :I , t-----�'= : ; • �DZ�S�P iti•��IOG�a' I` • 1 % / j. � � i]r. i� �. fir. � � �. I � • � � .�. Is � •!s� �:III� ,., APPENDIX C Growing Season Table TABLE 10. PROBABILITY OF FREEZING TEMPERATURES AFTER Probability in spring Station Temperature 90 75 50 25 10 percent percent percent percent percent 0- Bothell 2 N. 32 Apr. 18 Apr. 30 May 13 May 27 June 7 (elevation 100 feet) 28 Mar. 19 Mar. 30 Apr. 13 Apr. 27 May 8 24 Feb. 7 Feb. 21 Mar. 8 Mar. 21 Apr. 2 Cedar Lake 32 Mar. 21 Apr. 2 Apr. 15 Apr. 28 May 11 (elevation 1,560 feet) 28 Feb. 11 Mar. 1 Mar. 16 Mar. 30 Apr. 11 24 Jan. 29 Feb. 14 Mar. 1 Mar. 15 Landsburg 32 Apr. 15 Apr. 27 May 10 May 24 June 4 (elevation 535 feet) 28 Mar. 4 Mar. 16 Mar. 29 Apr. 11 Apr. 24 24 Jan. 8 Feb. 4 Feb. 19 Mar. 5 Mar. 18 Monroe 2 WSW. 32 Mar. 21 Apr. 3 Apr. 16 Apr. 30 May 12 (elevation 120 feet) 28 Feb. 21 Mar. 5 Mar. 19 Apr. 1 Apr. 14 24 (1/) Jan. 28 Feb. 17 Mar. 6 Mar. 17 Seattle -Tacoma Airport 32 Mar. 15 Mar. 27 Apr. 9 Apr. 23 May 4 _(_ele)ration 3ts6 feet) 28 reb_ . 5 F>_b. 23 Mar. 9 Mar. 23 Apr. 4 24 (1 ) Jan. 18 Feb. 9 _ Feb. 25 Mar. 9----. Seattle University of Washington 32 Feb. 26 Mar. 10 Ma:. 23 Apr. 6 Apr. 17 (elevation 113 feet) 28 Jan. 10 Feb. 2 Feb. 17 Mar. 2 24 (21j) Jan. 17 Feb. 6 Feb. 19 Snoqualmie Falls 32 Apr. 11 Apr. 23 May 6 May 20 June 1 (elevation 430 feet) 28 Mar. 6 Mar. 18 Apr. 1 Apr. 14 Apr. 27 24 (1/) Feb. 8 Feb. 24 Mar. 10 Mar. 23 Vashon Island 32 Mar. 10 Mar. 23 Apr. 5 Apr. 18 May 1 (elevation 231 feet) 28 Jan. 14 Feb. 7 Feb. 23 Mar. 8 Mar. 21 24 (-1/) Jan. 21 Feb. 9 Feb. 24 11 Not reported. n 90 fi SPECIFIED DATES IN SPRING AND BEFORE SPECIFIED DATES IN FALL Probability in fall Period between last occurrence 10 25 50 75 90 in spring and percent percent percent percent percent first in fall Days Sept. 12 Sept. 23 Oct. 5 Oct. 17 Oct. 28 145 Oct. 7 Oct. 18 Oct. 30 Nov. 11 Nov. 22 200 Oct. 22 Nov. 2 Nov. 15 Dec. 1 252 Oct. 10 Oct. 21 Nov. 2 Nov. 14 Nov. 25 201 Oct. 29 Nov. 9 Nov. 22 Dec. 5 Dec. 27 251 Nov. 13 Nov. 25 Dec. 10 (2/) (2/) 299 Sept. 21 Oct. 1 Oct. 14 Oct. 26 Nov. 6 157 Oct. 21 Nov. 1 Nov. 13 Nov. 25 Dec. 6 229 Nov. 7 Nov. 19 Dec. 2 Dec. 21 (i/) 286 Sept. 30 Oct. 11 Oct. 25 Nov. 4 Nov. 15 190 Oct. 22 Nov. 1 Nov. 1.3 Nov. 26 (�) 239 Nov. 2 Nov. 14 Nov. 27 Dec. 13 T) 283 Oct. 10 Oct. 21 Nov. 2 Nov. 15 Nov. 25 207 [/ Oct. 26 Nov. 5 Nov. 17 Dec. 2 Dec. 16 _ 253—fffY---_---u---Y �y Nov. 20 Dec. 5 (1 ) (17) 1 ) 325 Oct. 26 Nov. 6 Nov. 18 Dec. 1 Dec`. 11 240 Nov. 21 Dec. 1. Dec. 18 (�) (�) 319 Dec. 3 Dec. 19 (�) T) (J) 348. Sept. 16 Sept. 27 Oct. 9 Oct. 21 Nov. 1 156 Oct. 16 Oct. 27 Nov. 8 Nov. 20 Dec. 1 221 Nov. 8 Nov. 19 Dec. 2 Dec. 19 (i/) 281 Oct. 15 Oct. 26 Nov. 7 Nov. 19 Nov. 30 216 Nov. 18 Nov. 24 Dec. 9 Dec. 31 (i/) 289 Dec. 2 Dec. 16 Dec. 31 T) 344 91 468-266 0 - 73 - 6 I APPENDIX D Completed Data Forms ROUTINE WETLAND DETERMINATION - DATA FORM Project/Site: lica Cwner- Investigator(s): - Do Normal Circumstances exist on the site? Is the site significantly & recently disturbed? (Atypical Situation) Is the area a potential Problem Area? (explain in final remarks) VEGETATION - Dominant Plant Species Stratum Indicator , 2.(te�(w�afPJG" 3. 4. jV'V< 0\ (,( 1,;V) t , Percent of Dominant Species that are OBL. FACW or FAC (excluding FAC-) % 1987 MANUAL Sec: S Date: k�" Township: ZZti County: Range: : ` State: Washington (Ye No Plot ID: S�t� 9 Yes .No) Transect ID: ' Yes � Community ID: 6. 7. i P�x u�" _ 8. � c, do 6"I s� 9. ,l 1 10. _ Hydmphytic Vegetation Present? s No Basis for determination: 5D REMARKS:� HYDROLOGY Recorded Data (Describe in Remarks): Stream, Lake or Tide Gauge Aerial Photographs Other None Feld Observations Depth of Surface Water. IV 1-k (in.) PRIMARY Indicators Inundated Saturated in Upper 12' Water Marks Drift Lines Sediment Deposits Drainage Patterns in Wetlands SECONDARY Indicators Oxidized Root Channels in Upper 12' Water Stained Leaves Local Soil Survey Data FAC-Neutral Test Other (Explain in Remarks) Depth to Free Water in Pit: ��(in.) Depth to Saturated Soil:-",-� R_(in.) Wetland Hydrology Present? Yes.' No REMARKS: Basis for determination: 0 c� V SOILS I Soils Mapped As: `h d I Qr��l(X �L� ''Sand Drainage Class: I Feld Observations Taxonomy (Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth Matrix Color . Mottle Colors (inches} Horizon (Munsell Moist) (Munsell Moist) Texture. Concretions. Structure. etc. �-t-� w / -4p S&--t 1 Hydric Soil Indicators: = Histosol Reducing Conditions = Organic Streaking in Sandy Soils Histic Epipedon Gleyed or Low Chroma Colors Listed on Local Hydric Soils List Suffidic Odor _ Concretions Listed on National Hydric Soils List Aquic Moisture Regime _ High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? Ye No REMARKS: Basis for determination: Ljw�- WETLAND DETERMINATION — ( A- 9- ' Is this Sampling Point Within a Wetland? e ; No INVESTIGATOR: I ` Basis for determination: ROUTINE WETLAND DETERMINATION - DATA FORM : 1987;MANUAL Pro' Ile: -T6 Sec:Date:'1 plica C'wner. Township: 2'� n� -. County: "' I --``gator(s): .,1-17-t-v _ Range: State: Washington Do Normal Circumstances exist on the site? Yes - No Plot ID: i� Is the site significantly & recently disturbed? (Atypical Situation) Yes CNo� Transect ID: Is the area a potential Problem Area? (explain in final remarks) Yes N& Community ID: VEGETATION Dominant Plant Species Stratum Indicator om Want Plant Species Stratum Indicator 6.��-- 2. 1 ram'-�Tu �> 5 Pew --Vr1- r i'i 7. ' /i/�a" I ��r f 1 �w► 3. �1/��.1` -.) 1tif 6vG I 8. �cl / 1 �Z / Gl S- )A , A 4, 9. Ghwt G Giy.uTG_ F C Percent of Dominant Species that are Hydrophytic Vegetation Present? es No OBL, FACW or FAC (excluding FAC-) C/7 % Basis for determination: D o/ REMARKS: LAj , -. JY� ' v- HYDROLOGY .Recorded Data (Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12' Aerial Photographs Saturated in Upper 12" Water Stained Leaves Other Water Marks Local Soil Survey Data None Drift Lines FAC-Neutral Test Sediment Deposits Other (Explain in Remarks) Drainage Patterns in Wetlands Field Observations Depth of Surface Water r' rn: (in.) Depth to Free Water in Pit: >_(in.) Depth to Saturated Soil:-! _(in.) Wetland Hydrology Present? Yes � No REMARKS: r S o r i Basis for determination: ii �� Gnt4 L1M't �� Wf>� t""-e 2Q _ o h 4O po SOILS ( r Soils Mapped As: �� d l (A_O A Drainage Class: ' Feld Observations Taxonomy (Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth Matrix Color . Mottle Colors Mottle (inchesl Hopzoa (Munsell Moist) (Munsell Moist) (Abundance/Contrast) Texture. Concretions, Structure. etc. r) — cl/''1 (OJ I�- Zlrl L .rl�,, wl o vc. a.r► ; c G ll ►oy i �� °��13 1�y I2�� slfg►�+- 00� LA Hydric Soil Indicators: — Histosol Reducing Conditions � Organic Streaking in Sandy Soils Histic Epipedon Gleyed or Low Chroma Colors Listed on Local Hydric Soils List _ Sulfidic Odor _ Concretions Listed on National Hydric Soils List _ Aquic Moisture Regime _ High Organic Content in Surface Layer in Sandy Soils ' Hydric Soils Present? Ye No REMARKS: �� W Basis for determination+ WETLAND DETERMINATION Is this Sampling Point Within a Wetland? Yes lo� INVESTIGATOR: Basis for determination: � �/ ��6L - ROUTINE WETLAND DETERMINATION - DATA FORM 1987 MANUAL r, Date:Project/She: kfC{•i� Sec' o G -_Applicant/C'wner: 2.. __Township: ? Div ,County: IG/,JLr ` 71nvestigator(s): Tom/ Range: ''State: '- Washington Do Normal Circumstances exist on the site? No Plot ID: -� Is the site signficantly & recently disturbed? (Atypical Situation) Yes Transect ID: Is the area a potential Problem Area? (explain in final remarks) _=' Yes Community ID: - - _ VEGETATION , _. Dominant Plant Species Stratum Indicator .Do�min-an Plant Soecies Stratum Indicator JJo 2. '�O F = O_ IAA 7. S Jt. Gr,.� VCA UAA-QS a �.. L.i I 3. ' V 4. 4VWS Percent of Dominant Species that are HyEfrop4§ egetation rF e'se nt? No OBL, FACW or FAC (excluding FAC-) % Basis for determination: 5-0 r w VQ REMARKS: p �~ �/ t? +ntG d1►- cb, -- � 44A has tIn{�ewLe ��►u ►-�� I�I�c�Q__�Gl:�nt� HYDROLOGY Vl -r-- Recorded Data (Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12' Aerial Photographs Saturated in Upper 12" Water Stained Leaves Other Water Marks Local Soil Survey Data None Drift Lines FAC-Neutral Test Sediment Deposits Other (Explain in Remarks) Feld Observations Drainage Patterns in Wetlands • , t I 11 Depth of Surface Water.��(in.) Depth to Free Water in Ph:_(in.) Depth to Saturated Soil: 72 (in.) Wetland Hydrology Present? es No REMARKS: Basis for determination: SOILS r �� Soils Mapped As: '' -A IQ Not � � 0 � W�- ` . T� h� �t't�a Drainage Class: Feld Observations Taxonomy (Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth (inches) Horizon 'o—' �-- o "'- Matrix Color . Mottle Colors unsell Moist) (Munsell Moist) Sc�c1� t V�vti �a�� 511 Hydric Soil Indicators: Histosol Reducing Conditions Organic Streaking in Sandy Soils Histic Epipedon Gleyed or Low Chroma Colors —Listed on Local Hydric Soils List Sulfidic Odor _ Concretions Listed on National Hydric Soils List — Aquic Moisture Regime _ High Organic Content in Surface Layer in Sandy Soils L 6 Hydric Soils Present? Yes " No REMARKS: 7� A!D4�eS i^ J� � Basis for determination. ✓Ova rah-I� �t VJ WETLAND DETERMINATION Is this Sampling Point Within a Wetland? Y s No INVESTIGATOR: Basis for determination: ROUTINE WETLAND DETERMINATION - DATA FORM 1987 MANUAL P .ojecUSite: Sec: : Date: _ Applicant/C'wner. - Township: Z :_. County: Investigator(s): 44 Range: State: Wasehington Do -Normal Circumstances exist on the site? es No Plot ID: s Is the site sign ficantly & recently disturbed? (Atypical Situation) Yes ,No Transect ID: Is the area a potential Problem Area? (explain in final remarks) Yes -- No Community ID: VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Soecies Stratum Indicator . 2. 3. 4. 7 8. 9. 5. 10. Percent of Dominant Species that are Hydrophytic Vegetation Present? Yes o OBL, FACW or FAC (excluding FAC-) e % Basis for determination: REMARKS:—�----- G o HYDROLOGY Recorded Data (Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12- Aerial Photographs Saturated in Upper 12' Water Stained Leaves Other Water Marks Local Soil Survey Data None Drift Lines FAC-Neutral Test Sediment Deposits Other (Explain in Remarks) Drainage Patterns in Wetlands Feld Observations h Depth of Surface Water. 1 `� %� (in.) Depth to Free Water in Pit: (in.) Depth to Saturated Soil: i t'- (in.) Wetland Hydrology Present? Yes No REMARKS: Basis for determination: SOILS Soils Mapped As: �'� � � n,\. n'�-u 1 �A 1M 4-V\2 a l.,m Drainage Class: Feld Observations Taxonomy (Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth (inches) lima 0-10 10-��► Matrix Color (Munsell Moist) (J'2- IO P, V �- 1 Oy. 9— 514 Hydric Soil Indicators: Histosol Histic Epipedon _ Suffidic Odor Aquic Moisture Regime Mottle Colors Mottle (Munsell Moist) (Abundance/Contrast) hl a Y^ l-1 S0^f- 51"�C tn'�" ti i.s, t;o �or.A7 i.or1 Texture. Concretions. Structure, etc. Reducing Conditions _ Organic Streaking in Sandy Soils Gleyed or Low Chroma Colors _ Listed on Local Hydric Soils List _ Concretions Listed on National Hydric Soils List High Organic Content in Surface Layer in Sandy Soils y � ! c eojl� 1:1 , Hydric Solis Present. Yes :'No,,% REMARKS: h0. i' Basis for determination: - WETLAND DETERMINATION Is this Sampling Point Within a Wetland? Yes No, INVESTIGATOR: Basis for determination: ` ROUTINE WETLAND DETERMINATION - DATA FORM 1/987 MANUAL Sec:. Date �/• �S / �� -,�pplicanUG.wner: ✓ h�,�r'zr.— :._Township: z County: Investigator(s): N)Y.�� Range: State: Washington Do Normal Circumstances exist on the site? Yes No Plot ID: Is the site sign ficantly & recently disturbed? (Atypical Situation) "Yes (No- Transect ID: Is the area a potential Problem Area? (explain in final remarks) �, Yes ��hlo Community ID: VEGETATION-------____--�_--- . Dominant Plant Species Stratum Indicator 4 5. 1 Percent of Dominant Species that are OBL, FACW or FAC (excluding FAC-) REMARKS: W HYDROLOGY Recorded Data (Describe in Remarks): Stream, Lake or Tide Gauge Aerial Photographs Other None Feld Observations Depth of Surface Water. N"� (in.) 7. - a. 9. 10 Hydrophytic Vegetation Present? Yes No 0 % Basis for determination: 7So° �� Carney_ a�ic� �lo,�. � �•Q. PRIMARY Indicators •� SECONDARY Indicators Inundated Oxidized Root Channels in Upper 12' Saturated in Upper 12' Water Stained Leaves Water Marks Local Soil Survey Data Drift Lines FAC-Neutral Test Sediment Deposits Other (Explain in Remarks) Drainage Patterns in Wetlands Depth to Free Water in Pit: tl (in.) Depth to Saturated Soil: 1:1 (in.) Wetland Hydrology Present? Yes` No REMARKS: �I .$q-t�'4 @ %q it Basis for determination: 0f L ,� AQ L�t __ , �.w�� _ (L _ _� 6�, ,c SOILS C -.�` , Ihv� Soils Mapped As: �� w likidtaAc[ck.j IOU Drainage Class: Feld Observations Taxonomy (Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth Matrix Color . Mottle Colors Mottle (inches) Horizon (Munsell Moist) (Munsell Moist) (Abundance/Contrast) Texture Concretions. Structure. etc. p—` `I -P-` CAf�uc, lc --1.5 YPL5 to a �,ti eFLtM1 c t J � jL44- -�F/10 e_j kt Sc�hd�, johQ oc�r>�t,; Hydric Soil Indicators: Histosol Histic Epipedon -L Sulfidic Odor Aquic Moisture Regime Reducing Conditions _ Organic Streaking in Sandy Soils Gleyed or Low Chroma Colors _ Listed on Local Hydric Soils List Concretions Listed on National Hydric Soils List High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? ;�Y s No REMARKS: Basis for determination k -1 .Dv_ ,�s+/.Dv�nGt _ t:d� PAL-t WETLAND DETERMINATION �--� --� Is this Sampling Point Within a Wetland? Yes` No INVESTIGATOR: ' Basis for determination: II � �`�' .}- �- ROUTINE WETLAND DETERMINATION- DATA FORM 19117 MANUAL :' ... A ` Sec: 5 Date: Project/Site: �-� I.(rl _ ApplicanVC'wner: Township: e2,lxl : County: Investigator(s): iv► �; Range: 5� State: Washington Do Normal Circumstances exist on the site? No Plot ID: <; Is the site significantly & recently disturbed? (Atypical Situation) es No Transect ID: Is the area a potential Problem Area? (explain in final remarks ;..� po ( p ) Y es o Community ID: VEGETATION - Dominant Plant Species Stratum Indicator .-: Dominant Plant Soecies Stratum Indicator -- 2. �dlcus 1�►��+u_ 5. Percent of Dominant Species that are OBL, FACW or FAC (excluding FAC-) % REMARKS: O✓ecA \ 6. 7. 8. 9. 10. _ Hydrophytic Vegetation Present? Yes Basis for determination:—r-1;�� IM HYDROLOGY Recorded Data (Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12- ;' Aerial Photographs Saturated in Upper 12" Water Stained Leaves Other Water Marks Local Soil Survey Data None Drift Lines FAC-Neutral Test Sediment Deposits Other (Explain in Remarks) Drainage Patterns in Wetlands Feld Observations r_� Depth of Surface Water. fir` (in.) Depth to Free Water in Pit: lD �2 (in.) Depth to Saturated Soil: `fi (in.) Wetland Hydrology Present? (Yes No REMARKS: Saj_ f /i^016+, _ 1►-►-+ I Basis for determination: SOILS Soils Mapped As: a I ('4k,,, /'hu G �L Drainage Class: Feld Observations Taxonomy (Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth Matrix Color . Mottle Colors Mottle finches} Horizon (Munsell Moist) (Munsell Moist) (Abundance/Contrast) Texture. Concretions. Structure. etc.. w 0-9 > Z 7.5 P- 0 u�k ' Hydric Soil Indicators: — Histosol Reducing Conditions Organic Streaking in Sandy Soils Histic Epipedon _ Gleyed or Low Chroma Colors _ Listed on Local Hydric Soils List SuBidic Odor = Concretions Listed on National Hydric Soils List Aquic Moisture Regime High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? 01Y�es. No REMARKS: �1 Basis for determination: WETLAND DETERMINATION �.,, Is this Sampling Point Within a Wetland? g No INVESTIGATOR: Basis for determination: tX 1 ROUTINE WETLAND DETERMINATION - DATA FORM 1987 MANUAL ".,::..: 11 Pro*ecV, 14, /,T�-nL Sec: D ate. - , F9 W-ior Township: County: I n v 6-sl (s): Range: -State: Kshington Do Normal Circumstances exist on the site? yes No Plot ID: Is the site significantly & recently disturbed? (Atypical Situation) Yes <R4 TransectID: Is the area a potential Problem Area?.(6xplain in final remarks) Yes �) Community ID: YEGETATiON Dominant Plant Species Stratum Indicator -,-: T 1. �4�,f, i(ttb✓u ::..-_ DomMiffPlant Species Stratum Indicator 6. 11.E COVNV�-,'�"q 2- Y�K.a 7. Alp—. 3. 5LA V6jVLkja,; e )ep 1 4, ot s. 10. I I I Percent of Dominant Species that are -7 FACW or FAC (excluding FAC-) (0 I& AZ_ Hydrophytic Vegetation Present? Yes No Basis for determination: VAI'L A — EA 4AIAt 1/ C4 CcWce_ -HYDROLOGY :Recorded Data (Describe in Remarks): PRIMARY Indicators SECONDARY Indicators -Stream, Lake or Tide Gauge inundated Oxidized Root Channels in Upper 12" Aerial Photographs Saturated in Upper 12" Water Stained Leaves Other Water Marks Local Soil Survey Data None Drift Lines FAC-Neutral Test Sediment Deposits Other (Explain in Remarks) Drainage Patterns in Wetlands Field Observations Depth of Surface Water. hA (in.) Depth to Free Water in Pit: (in.) Depth to Saturated Soil: (in.) Wetland Hydrology Present? Yes � No REMARKS: c4-c.,�. Basis for determination'. 6) SOILS Soils Mapped As: MULeJC__ Taxonomy (Series and Phase): Profile Description: Depth Matrix Color Mottle Colors Mottle '. I (Munsell Moist) �l IL_ -2-1 011 (L .31" Hydric SoilIndicators: Histosol :31-t-Histic Epipedon.'-' Suffidic Odor Aquic Moisture Regime IMD =I-- M- "No tev-14 Drainage Class: Field Observations Confirm Mapped Type? Yes No Texture, Concretions. Structure -etc. mo 15 yvt G !c ��inn i J Reducing Conditions Organic Streaking in Sandy Soils Gleyed or Low Chroma Colors Listed on Local Hydric Soils List Concretions Listed on National Hydric Soils List High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? jY No REMARKS: Basis for determination: 0 V\A 4& WETLAND DETERMINATION Is this Sampling Point Within a Wetland? iYesti No INVESTIGATOR: /10_ Basis for determination: I ROUTINE WETLAND DETERMINATION - DATA FORM _ ProiecVSite: t'Cllaf� 7 ..,.Sec: plica3niC'wner. G i Tom/ vr- !4 r i �clti' _.Township: - 23 nj Investigator(s): /Vt 7-y Range: ` ' Do Normal Circumstances exist on the site? Qes No Is the site significantly & recently disturbed? (Atypical Situation) No . Is the area a potential Problem Area? (explain in final remarks) Yes "'fo VEGETATION Dominant Plant Species Stratum Indicator 2. 3. - N�kVmVµ_l�� sep4u►k. 4. 1987 MANUAL Date: y017-/alb County: - kf'_iN/� State: Washington Plot ID: Transect ID: Community ID: t6miaant Plant Species Stratum Indicator 8. 9. 5. 10. Percent of Dominant Species that are Hydrophytic Vegetation Present? es No OBL, FACW or FAG (excluding FAC-) % Basis for determination: U&4cber ^ - REMARKS: s4%Vol vt HYDROLOGY Recorded Data (Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12' Aerial Photographs Saturated in Upper 12" Water Stained Leaves Other Water Marks Local Soil Survey Data None Drift Lines FAC-Neutral Test Sediment Deposits Other (Explain in Remarks) Drainage Patterns in Wetlands Feld Observations Depth of Surface Water. (in.) Depth to Free Water in Pit: i 5- (in.) Depth to Saturated Soil: 1 (in.) Wetland Hydrology Present? Basis for determination: 4 No `REMARKS: 43 ¢e-v i 2_j1 yVt rc Soils Mapped As:� C� (a,� ma t. _ Drainage Class: Field Observations Taxonomy (Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth Matrix Color . Mottle Colors Mottle (inches) Horizon fMunsell Moist) (Munsell Moist) (Abundance/Contrast) 64ur-jc kc lob Ryi- Hydric Soil Indicators: — — _ Histosol Reducing Conditions Organic Streaking in Sandy Soils -i--- Histic Epipedon _ Gleyed or Low Chroma Colors _ Listed on Local Hydric Soils List Suffidic Odor Concretions Listed on National Hydric Soils List Aquic Moisture Regime High Organic Content in Surface Layer in Sandy Soils ' Hydric Soils Present? Yes No REMARKS: Basis for determination: WETLAND DETERMINATION `.. Is this Sampling Point Within a Wetland? Yes No_ INVESTIGATOR: Al Basis for determination: ROUTINE WETLAND DETERMINATION - DATA FORM 1987/M]ANUAL - : ErojectiSite:. .. Sec:..._ c ; 'Date:^ Y�I7I�I 6 plicanUC'wner: GI-c-4 0, — I � F51 ON Township: 2 3N County: F— ' Investigator(s): �'� s'/ Ran e: 5 State: Washington Do Normal Circumstances the Plot ID: exist on site? es., No Is the site sign ficantly & recently disturbed? (Atypical Situation) Yes toTransect ID: j Is the area a Problem Area? in final Yes Community ID: potential (explain remarks) ------------------------------------------- - . VEGETATION -� (— ' Dominant Plant Species Stratum Indicator Dernirtant Plant Species Stratum Indicator s. 465 ►'4bra 2. Atki%(w 7.Cov�VoIulv47 5ea1LA&kN ca_5 8. ' 4. J4AbUs �,V 9. 5. 10. Percent of Dominant Species that are .— Hydrophytic Vegetation Present? oe-sNo OBL, FACW or FAC (excluding FAC-) % Basis for determination: 'l �-6 d/O V REMARKS: hvve e_+a C IS CIS 4ag as %) J HYDROLOGY U y Ab'r 2S ✓u�c1S Recorded Data (Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12' Aerial Photographs Saturated in Upper 12" Water Stained Leaves Other Water Marks Local Soil Survey Data None Drift Lines FAC-Neutral Test Sediment Deposits Other (Explain in Remarks) Drainage Patterns in Wetlands Field Observations Depth of Surface Water. Depth to Free Water in Pit: I0/1 (in.) Depth to Saturated Soil: SWI, < (in.) Wetland Hydrology Present? a No REMARKS:... Basis for determination: SOILS / Soils Mapped As:_ fit G I CCtrf Taxonomy (Series and Phase): -Profile Description: Depth (inchesl Horizon Hydric Soil Indicators: Matrix Color (Munsell Moist! jo�7(Z Z%r 1py��l! Mottle Colors Mottle (Munsell Moist) (Abundance/Contrast) Drainage Class: Field Observations Confirm Mapped Type? Yes No Texture. Concretions. Structure. etc. hq� � e.r� 5l �P► Histosol Reducing Conditions _ Organic Streaking in Sandy Soils 4 Histic Epipedon _ Gleyed or Low Chroma Colors _ Listed on Local Hydric Soils List `4' SuKidic Odor — Concretions Listed on National Hydric Soils List Aquic Moisture Regime _ High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? es No , REMARKS: Basis for determination: , WETLAND DETERMINATION Is this Sampling Point Within a Wetland? Yes) No INVESTIGATOR: Basis for determination: ' G/ APPENDIX E Earthen Trench Plug TRENCH PLUG W/rH SELECTED LOW PERvfABLE. NONDSPERSIBLE CLAY MATERIAL WIM. PLASTICITY IMXX OF IOL COMPACTED TO 957. RELATIVE COMPACTION. SEE MOTE 1.-1 TOP Of TRENCH BACKFI L L AS REQUIRED TRENCH BOTTOM 1. I SfE NOTE i NOTES. 1. TRENCH PLUG SHALL BE KEYED INTO EACH SIDE AND BOTTOM OF TRENCH A MINIMUM Of 6. 2. WHERE SUITABLE IMPERVIOUS MATERIAL IS NOT AVAILABLE. LEAN MIX CONCRETE MAY BE SuBSuruTEQ J. PROVIDE TRENCH PLUGS AT LOCATIONS AND INTERVALS SP.ECIF►EQ EARTHEN TRENCH PLUG e QEppNG