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U 1t F EE_ � } February 2, 2011 HWA Project No. 2009-058-21 Task 3 Carollo Engineers 1218 3'd Avenue, Suite 1600 Seattle, Washington 98101 Attention: Ms, Lara Kammereck, P.E. SUBJECT: FINAL GEOTECHNICAL EVALUATION REPORT East. Renton Lift Station Elimination Renton, Washington Dcar Ms. Kamincreck: L y p .. cjry� A fE i r_ 7l tom- Ii 1•,/-c: As requested, HWA GeoScienccs Inc. (HWA) has undertaken a geotechnical investigation to evaluate the subsurface soil conditions associated with the subject project. Our investigation consisted of performing site explorations, laboratory testing, geotechnical analyses. and preparation of this report. The field exploration program consisted of test pits at selected locations. Soils information obtained from our field exploration and laboratory testing Was used to develop the recommendations provided herein. PROJECT DESCRIPTION We understand that the City of Renton (City) is proposing to eliminate the East Renton Lift Station, located to the north of the right of way of SE 136`" Street in Renton, Washington, as indicated in the attached Vicinity Map, Figure 1. Previous studies have determined that elimination of this lift station would require the construction of a gravity sewer line linking the in flow to the current lift station to an existinD sewer system to the south. To best facilitate this connection, the proposed alignment would extend from the existing lift station, through Maplewood Park, and connect to the City's existing sewer systern near the northern terminus of 148`1' Place southeast. Given the site topography, it is our understanding that trench excavations ranging from 7 to 12 feet deep will be required to maintain the desired gradient along the alignment. The proposed alignment through Maplewood Park, as shown in the Site and Exploration Plan, Figure 2, will require a small creels crossing located just to the south of the existing lift station. It is our understanding that both open trench and trenchless construction methodologies are being considered for this crossing. SITE CONDITIONS The existing temporary sewer lift station is situated on the north side of the 2 � 31 _anti, Div(- si: right-of-way for SE 136th Street, which presently remains undeveloped in the ;ire 110 segment extending from the also undeveloped right-of-way for 148t" Avenue SE 8LithL,J- ',%A %WlI,,(110 lcl: 42,.;'74.u1n6 1.271-1 S� 5V"it. �1W il�Ci1.COI51 4V February 2, 2011 HWA Project No. 2009-058-21 Task 3 to the west and 152nd Avenue SE to the east. The lift station occupies the southwest corner of an existing storm water management pond site that apparently was constructed in conjunction with a residential neighborhood development to the north and cast. The existing SE 136th Street right-of-way contains other underground services such as water and gas lines that run in an east - west direction within the right-of-way south of the lift station. Existing cast -west sanitary sewer lines connect with the lift station at the present time and also trend east -west in alignment. The proposed sewer line alignment follows established trails through the majority of the heavily forested park. The topography along the proposed alignment generally slopes to the south while crossing a modest draw and a seasonally varying creek. The northern portion of the alignment runs parallel with a pressure gas line and the proposed alignment crosses the gas line approximately half way through the park. GEOLOGY According to the Geologic Map cif King County, Washington, by Derek P. Booth, and Aaron P. Wisher (Booth et al, 2006) the site is underlain by glacial till soils deposited sub -glacially from the Vashon Ice Sheet. The glacial till has been over -ridden by glacial ice and is very dense and concrete -like as a consequence, in its un-weathered state. When exposed at surface, however, the upper 3 to 5 feet is commonly weathered and less dense. In view of the forest setting of the alignment, it is evident that a surticial topsoil and organic duff layer overlies the glacial till, and it is anticipated that the wetlands features will contain variable thicknesses of organic peaty soils near -surface. FIELD EXPLORATIONS Subgrade soils along the proposed alignment were explored through the excavation of six test pits, completed on December 2, 2010. The test pits, designated TP-1 through TP-6, were advanced along the proposed gravity sewer alignment, at the approximate locations shown on Figure 2. The depths of the test pits ranged between 4.5 and 10 feet below ground surface (bgs). An abandoned, 400-pair, Quest phone line was inadevertantly encountered at 3.5 feet bgs in test pit TP-1. Subsequent conversations with Quest revealed that a live 600-pair, abandoned 400-pair, and abandoned 200-pair phone lines are located within close proximity to the location of TP-1. The test pits were excavated by the Glenbrook Services, with a Kubota KX-121 rubber tracked excavator, and logged by an HWA geotechnical engineer. Soil samples obtained from the explorations were classified in the field and representative portions were placed in plastic bags and returned to our Bothell, Washington, laboratory for further examination and testing. On completion, the test pits were backfilled with the excavated spoils, then tamped with the excavator bucket and a jumping jack compactor. However, some future settlement at the test pit locations should be expected. A Legend of Terms and Symbols Used on Exploration Logs is presented on Figure A- L in Appendix A. Summary soil exploration logs are presented on Figures A-2 through A-7. It Final Letter Report 2 HWA GeoSciences Inc. February 2, 2011 HWA Project No. 2009-058-21 Task 3 should be noted that the stratigraphic contacts shown on the individual exploration logs represent the approximate boundaries between soil types; actual transitions may be more gradual. Moreover, the soil and ground water conditions depicted are only for the specific date and locations reported and, therefore, are not necessarily representative of other locations and times. LABORATORY TESTING Laboratory tests were conducted on selected soil samples to characterize relevant engineering properties of the on -site subsurface materials. The laboratory testing program was performed in general accordance with appropriate ASTM Standards as outlined below. Moisture Content of Soil: The moisture content (percent by dry mass) of selected soil samples was determined in accordance with ASTM D 2216. The results arc shown at the sampled intervals on the test pit logs in Appendix A. Particle Size Analysis of Soils: Selected samples were tested to determine the particle size distribution of material in accordance with ASTM D 422. The results are summarized on Figures B- I and B-2, which also provide information regarding the classification of the samples and the moisture content at the time of testing. SUBSURFACE SOIL CONDITIONS Our interpretations of subsurface conditions are based on results of our field explorations, review of available geologic and geotcchnical data, and our general experience in similar geologic settings. In general, soil conditions throughout the project site consist of surficial topsoil (forest litter) over areas of weathered and non -weathered glacial till. Isolated areas of imported fill (trail base) are also located across the site. Each major soil unit is described below, with materials interpreted as being youngest in origin and nearest to the surface described first. • Topsoil — A thin layer of topsoil or forest litter was encountered at all of the test pit locations across the project site. The topsoil consisted of a combination of silty fine sand and sandy silt with abundant organics throughout. Buried decomposed topsoil was also encountered below the trail base material in test pit TP-2. • Trail Base —Trail base material was encountered at the ground surface in test pit TP-2. This material consisted of angular gravel that appeared to be placed during initial establishment of this portion of the trail. This layer of soil was approximately 1 foot thick and possessed scattered construction debris throughout. • Weathered Glacial Till — Weathered glacial till was encountered in all test pits with the exception of TP-2. This material consisted on loose to medium dense silty sand with gravel. This material extended to depths ranging from 2 to 4 feet bgs where encountered. Glacial Till — Glacial till was encountered in all test pit explorations across the site. The glacial till varied in consistency across the site. Evidence of cohesive (Le fine-grained clayey) material was observed in test pits TP-1 trough TP-3; whereas coarser, less cohesive, glacial till was encountered in test pits TP-5 and TP-6. The glacial till Final Letter Report 3 HWA GeoSciences Inc. February 2, 2011 HWA Project No. 2009-058-21 Task 3 encountered in TP-4 consisted of uniform fine-grained sand. Glacial till extended below the termination depth at all test pit locations. Based on the regional geology we anticipate that very dense glacially consolidated soils extend to great depths in this area. GROUND WATER CONDITIONS Abundant ground water seepage was observed in test pits TP-1 and TP-2 at the time of our explorations. At these locations ground water seepage was observed flowing into the excavations at a rate such that 2 to 4 inches of standing water was present at the base of each excavation throughout the excavation process. The observed seepage was concentrated in the soils located just above the contact between the weathered glacial till and the glacial till. No seepage from within the unweathered denser glacial till soils was observed during our explorations. Therefore, it appears as if the ground water seepage at these locations is due to perched ground water. Additionally, based on the locations of test pits TP-1 and TP-2 in close proximity of the creek, it is assumed that this perched ground water is associated with water ingress from the creek. Conversations with King County Park personnel indicated that the creek does not fully dry up in the dry summer months, and is probably indicative of recharge from the perched water within the upper surficial materials and weathered glacial till. No ground water seepage was observed in test pits TP-3 through TP-6 at the time of our explorations. Therefore, our explorations indicate that perched ground water can be expected from the existing lift station site to some undetermined location between test pits TP-2 and TP-3. CONCLUSIONS AND RECOMMENDATIONS GENERAL The glacial till soils encountered along the proposed alignment should provide adequate support for the proposed pipe. Construction of the proposed sewer line is feasible using conventional construction equipment and standard trenching methods. However, perched ground water conditions in the vicinity of the creek crossing will require de -watering on an as needed basis. Both open -cut and trenchless construction methodologies are feasible alternatives to facilitate the required creek crossing. CREEK CROSSING As outlined previously, conversations with King County Park's representatives indicated that the creek located near the existing lift station maintains flow all year long. Therefore, construction of the proposed sewer line should account for the presence of this flow during construction of the creek crossing. However, we anticipate that the dry summer season will represent the optimum time for cronstruction of the crossing as ground water conditions will be reduced at this time. If standard open -trench construction is to be used to facilitate this creek crossing, temporary diversion of the creek's flow will be necessary to allow for pipe placement within the creek bed. Once the creek is diverted standard open -cut construction procedures, described below, should Final Letter Report 4 HWA GeoSciences Inc. February 2, 2011 HWA Project No. 2009-058-21 Task 3 be implemented. Even with diversion of the creeks flow, perched ground water should be expected during open -cut construction in this area. Therefore, de -watering will still be necessary. It is anticipated that this dewatering may be facilitated with approptiately positioned collector sumps and standard sump pumps. If diversion of the creek flow is not feasible or environmentally acceptable, then several trenchless pipe installation methodologies could be used to make the crossing without disturbing the creek. In consideration of the proposed sewer pipe size (I5-inchdiameter), we believe that a short pipe jacking or jack and bore operation would be best suited to installation of the gravity sewer line under the creek. In these operations, typically an over -sized casing is advanced by progressive jacking from the entry pit and removal of soils from the casing interior by horizontal -auger drilling equipment. We understand that casing sizes ranging from 6 to 36 inches are common for such operations. Pipe ramming is another method that is similar to jack and bore methods and consists of pneumatic haTnmer advancement of the casing. Soil cleanout is undertaken either during advancement, to facilitate pipe penetration, or on completion, and the cleanout may be achieved by auger, air or hydraulic excavation means. In either case, the carrier pipe is inserted into the installed casing with suitable spacer provisions between the two and any void spaces are subsequently grouted. For either method, we recommend that the casing size selected be large enough to permit man -entry for purposes of removing any boulders that may obstruct casing advancement. Micro -tunneling equipment and methods are available that can install underground services in glacial till soils, such installations are generally limited to pipe sizes not less than I foot in diameter, and more commonly are applied for installations considerably larger. The micro - tunneler is inserted into the entry pit and controlled remotely from the pit exterior. Stability of the cut face is controlled by compensating pressure applied to the face, if soil sloughing or running is anticipated, and soils are removed through the cutting head as the tunneler is advanced. However, we do not believe that this method would be suitable for this project due to the small pipe size and short crossing length. Moreover, the presence of boulders, such as is common in glacial till soils, in the tunnel path can be more problematic for this type of equipment. Horizontal directional drilling (HDD) pipe installation methods have been successfully employed on many occasions to install underground services of the size proposed herein. Normally, the entry and exit locations are selected as a function of the curvature limits of the drill stem and the pipe element to be installed. This requires that the entry and exit locations need to be setback sufficiently from the end target installation points to permit the drill stem to follow a curvilinear path that will coincide with the desired pipe profile. We do not believe that this would be a cost effective solution based on the relatively short desired length. However, if this method is to be employed, we recommend that the pipe entry point be started within the unweathered till zone. Our experience with HDD methods, where a loose material exists at surface over a dense material at depth, is that the drill head tends to deflect from the intended path and track along the surface of the denser soil. Final Letter Report 5 HWA GeoSciences Inc. February 2, 2011 HWA Project No. 2009-058-21 Task 3 The presence of underground obstructions, typically consisting of boulders, logs or other woody debris, or construction materials included in fills, can be problematic for all of the trenchless installation methods if they occur within the path of the advancing casing pipe, and could also pose problems for advancement of sheet piles that might be considered for pit shoring purposes. Obstructions are particularly problematic for small diameter casings that are not large enough to permit man -entry to clear the obstruction. The nature of glacial till is such that large boulders could be encountered within the path. Because a large boulder was encountered in TP-3, we recommend that contractual language be included in the project bid documents to indicate their possible presence to contractors, such that the potential associated construction risks may be included in the contract bid prices. Each of these trenchless construction applications, with the exception of directional drilling, requires the construction of significant jacking and receiving pits. These pits are generally temporarily shored excavations constructed large enough to accept the associated equipment at the desired grade. For purposes of this project, these pits would most likely be constructed as close to each side of the creek as possible (minimizing the distance of trenchless installation). Given the proximity to the creek, and the perched ground water encountered in this area, each pit would require de -watering to maintain a dry working area. The shoring normally associated with jacking and receiving pits generally consist of internally braced sheet piles, soldier piles and lagging, or trench boxes. If jacking and receiving pits are required, shoring should be designed by the contractor and constructed to support lateral loads exerted by the soil mass. In addition, any surcharge from construction equipment, construction materials, or excavated soils should be included in the shoring design. F' `hire 3 presents recommended earth pressures for temporary shoring. It should be noted that the earth pressure diagram does not account for hydrostatic pressure associated with the perched ground water. The magnitude of the hydrostatic pressure will, however, depend on the type of shoring system used (e.g. water pressures would be higher on sheet piling than on lagged shoring systems, or trench boxes). Therefore, we recommend that the contractor account for hydrostatic pressure during design based on the type of shoring utilized. Furthermore, we recommend that the contractor be required to submit a shoring/excavation plan designed by a professional engineeer for review and approval prior to construction. The plan should be required to contain specific measures for temporary support and protection of all existing utilities and structures that may be located within such proximity of the work as to be potentially affected. OPEN -CUT TRENCH CONSTRUCTION Open -cut excavations for the sewer line can be accomplished with conventional excavating equipment such as backhoes and trackhoes. Because of the dense to very dense nature of the glacial till soils, hard digging can be expected along the project alignment. The contractor should account for this in his bid price and no subsequent claims for hard digging or "rock" excavation should be allowed, including the possible presence of large boulders. Maintenance of safe working conditions, including temporary excavation stability, is the responsibility of the contractor. In accordance with Part N of Washington Administrative Code Final Letter Report 6 HWA GeoSciences Inc. February 2, 2011 HWA Project No. 2009-058-211 Task 3 (WAC) 296-155, latest revisions. all temporary cuts in excess of 4 feet in height must be either sloped or shored prior to entry by personnel. The existing native soils generally consist of loose to medium dense sands and silty sands with gravel (weathered glacial till) underlain by dense to very dense silty sand with gravel (unweathered glacial til). The near surface weathered glacial till generally classify as Type C soil, per WAC 296-155, and, if no trench box is used, should be sloped no steeper than 1'/2H: l V. The underlying dense to very dense glacial till generally classify as Type A soil, per WAC 296-155, and, if no trench box is used, should be sloped no steeper than 3/411:1 V. Flatter side slopes will be required where ground water seepage occurs. Lateral support for the trench walls should be provided by the contractor to generally prevent loss of ground. General recommendations for design and implementation of shoring and bracing systems are presented below. Trench boxes should provide suitable support for trench excavations in native glacial till soils provided settlement sensitive structures or utilities are not situated near the excavation. • Precautions should be taken during removal of the shoring to minimize disturbance of the placed pipe, underlying bedding materials, and native subgrade soils. • The contractor should be responsible for control of ground and surface water and should employ sloping, slope protection, ditching, sumps, dewatering, and other measures as necessary to prevent sloughing of soils. Although not anticipated, if unsuitable soils are encountered at the pipe invert during excavation, they should be over -excavated and removed. Unsuitable soils include soft peat, silt or organic material (i.e. logs, stumps etc.). Over -excavated areas should be backfilled with l'/4-inch minus crushed rock meeting the gradation requirements for crushed surfacing, as described in Section 9-03.9(3) of the WSDOT Standard Specifications (WSDOT, 2010). Over -excavation to remove unsuitable soils from below the pipeline should be limited to a depth of 3 feet. It should extend for the full depth on both sides of the pipe a distance which is equal to the depth of the over -excavation, or one pipe diameter, whichever is less. Where the native soils are competent and do not require over -excavation, bedding material should be placed directly on the undisturbed native soils. Trench bottoms should be free of debris and standing water. If native subgrade soils are disturbed, the disturbed material should be removed and replaced with additional compacted bedding material. Pipe bedding material, placernent, compaction, and shaping should be in accordance with the project specifications and the pipe manufacturer's recommendations. In general, the pipe bedding should meet the gradation requirements of Section 9 03.12(3) Gravel Backtill for Pipe Zone Bedding, of the 2010 WSDOT Standard Specifications. Pipe bedding should provide a firm uniform cradle for support of the pipe. A minimum 4-inch thickness of bedding material beneath the pipe should be provided. Prior to installation of the pipe, the pipe bedding should be shaped to fit the lower part of the pipe exterior with reasonable closeness to provide uniform support along the pipe. Pipe bedding material should also be used as pipe zone backfill and placed in layers and tamped around the pipes to obtain complete Final Letter Report 7 HWA GeoSciences Inc. February 2, 2011 HWA Project No. 2009-058-21 Task 3 contact. To protect the pipe, bedding material should extend at least 6 inches above the top of the pipe. The native glacial till soils are fine grained in nature and are likely to be very sensitive to moisture variation, which could have a very adverse effect on their ability to be reused as trench backfill material. In general, however, the moisture content of the unweathered till is anticipated to be within reasonable limits of the optimum values that would be suitable for compaction to required density levels for trench backfill. Accordingly, we believe that with selective use of lower moisture content materials, the native glacial till may be reused for backfill in areas which will not be developed and require higher quality subgrade conditions for future facilities (e.g. roadways, sidewalks, parking areas, etc.). We recommend that all bolders and any cobbles larger than 4 inches be removed from the trench backfill, when native soils are being reused. Where such future development may overlie the sewer line, the native materials should not be re -used as trench backfill. Imported trench backfill should be used in these areas and should meet the gradation requirements of Gravel Borrow as specified in Section 9-03.14(l), of the 2010 WSDOT Standard Specifications. The backfill should be compacted in a systematic manner to at least 92 percent of the maximum dry density (MDD), as determined by ASTM test method DI 557. Beneath areas anticipated to experience future vehicle traffic, the upper 4 feet of trench backfill should be compacted to 95% of MDD. In landscaped areas backfill should be compacted to at least 90 percent of MDD, except the top 2 feet, which should be compacted to at least 92 percent. During placement of the initial lifts, the trench backfill material should not be dropped directly on the pipe. Heavy vibratory equipment should not be permitted to operate directly over the pipe until a minimum of 3 feet of backfill has been placed over the pipe bedding. If the trench backfill is placed at the compaction levels indicated above, settlement of the trench backfill is expected to be about 1 % of the thickness of the backfill. DEWATERING Based on the perched ground water encountered in test pits TP-1 and TP-2 we anticipate that the contractor will have to conduct some form of de -watering during trench excavation, and potential pit excavations, located between the existing lift station and some point north of test pit TP-3. Based on the perched ground water and the relatively impermeable nature of the glacial till we anticipate that this de -watering effort will consist of strategically positioned sump pits and not wells. However, design of the de -watering system should be the responsibility of the contractor. WET WEATHER EARTHWORK We recommend that the work be performed during the dry summer season, when excavation and handling of the moisture sensitive native soils will be most readily performed, However, if necessary, general recommendations relative to earthwork performed in wet weather or in wet conditions are presented below. These recommendations should be incorporated into the contract specifications. Final Letter Report 8 HWA GeoSciences Inc. February 2, 2011 HWA Project No. 2009-058-21 Task 3 • Earthwork should be performed in small areas to minimize exposure to wet weather. Excavation or the removal of unsuitable soil should be followed promptly by the placement and compaction of clean structural fill. The size and type of construction equipment used may need to be limited to prevent soil disturbance. • The ground surface within the construction area should be graded to promote run-off of surface water and to prevent the ponding of water. • The ground surface within the construction area should be scaled by a smooth drum roller, or equivalent, and under no circumstances should soil be left uncompacted and exposed to moisture infiltration. • Excavation and placement of fill material should be undertaken under the observation of a representative of the geotechnical engineer, to determine that the work is being accomplished in accordance with the project specifications and the recommendations contained herein. CONDITIONS AND LIMITATIONS We have prepared this assessment for Carollo Engineers and the City of Renton for use in design of this project. The conclusions and interpretations presented in this report are based upon review of existing information and field data recently acquired at specific locations along the proposed project alignment, and should not be construed as our warranty of existing subsurface conditions along all portions of the project. Experience has shown that soil and ground water conditions can vary significantly over small distances. Inconsistent conditions can occur between exploration locations and may not be detected by a geotechnical study of this nature. If, during future site operations, subsurface conditions are encountered which vary appreciably from those described herein, HWA should be notified for review of the recommendations of this report, and revision of such if necessary. Our work scope did not include environmental assessments or evaluations regarding the presence or absence of wetlands or hazardous substances in the soil, surface water, or ground water at this site, except to the extent that is discussed in this report in respect to geotcehnical considerations for this project. Final Letter Report 9 HWA GeoSciences Inc. February 2, 2011 HWA Project No. 2009-058-21 Task 3 We appreciate the opportunity to provide geotechnical services on this project. Sincerely, HWA GEOSCIENCES INC, 0 1 HMI %V A 511� C �+ 4 �4 O K � OP r Donald J. ruling, P.E. Geoteclmical Engineer Attaelniients: Lorne A. Balanko, P.E. Principal Geotechnical Engineer Figure 1 Vicinity Map Figure 2 Site and Exploration Plan Figure 3 Design Earth Pressures for Temporary Braced Shoring Appendix A: Field Exploration Figure A-1 Legend of Terms and Symbols Used on Fxploration Logs Figures A-2 to A-7 Logs of Test Pits TP-i through TP-12 Appendix B: Laboratory Test, ing Figures B-1 to B-2 Grain Size Distribution Test Results REFERENCES Booth Derek P, and Wisher Aaron P. 2006, Geologic Map of King County, Washington. Washington Department of Transportation (WSDOT), 2010, Standard Specifications for Road, Bridge, and Municipal Construction, M 41-10. Final Letter Report 10 HWA GeoSciences Inc. TOP:)! map printed on 01/05111 from "Washington.tpo" and "Untited.tpg" 122°10.000' W 122°09.000' W 1112°08.000' YV WG884122107,OCO' W TN MN MR 9r�1000 FW 0 500 ...... ._ IOOOMFTFFIS �J�J F'nntcd Cmm 70PO1 02001 Newrial Gsai Ho-]dvir (w wpc comb HWAGEOSCIENCES INC. VICINITY MAP EAST RENTON LIFT STATION ELIMINATION RENTON. WASHINGTON FIGURE NO. PROJECT NO. 2009-058 I -�-- �IMF LLJ W o - CL t i- { T,' ` III z WS C.3 0 Ej 1 W z III " f w cn in w W ul LLJ LU J F w? X I30H+30D I621D ACTIVE PRESSURE PASSIVE PRESSURE Infiuence Factor ( i ) for Surcharge Loads For x2H 0=0 H>x>H/2 i=0.5 H/2>x>H/4 i=0.75 NOTES: H/4>x i=1.0 1. ASSUMED SOIL CONDITIONS: GROUND SURFACE TO 4 FT: = 350, y = 135PCF, K a = 0.27 4 TO (H+D). FT: fi = 40°, y = 135PCF, K a = 0.22, K p = 4.60 2. SURCHARGE LOADS SHOULD BE ADDED WHERE APPROPRIATE, USING THE FORMULA ABOVE, 3. SHORING EMBEDMENT (D) SHOULD BE DETERMINED BY SUMMATION OF MOMENTS ABOUT THE LOWEST BRACE. 4. NO FACTOR OF SAFETY HAS BEEN APPLIED TO THE RECOMMENDED PASSIVE EARTH PRESSURE. (FS=1.5 MINIMUM RECOMMENDED) S. DISTANCES ARE 1N UNITS OF FEET; PRESSURES ARE IN UNITS OF POUNDS PER SQUARE FOOT. I L.I'Ir VIt1 M1I\1 VIV1l.LV JI I%JI\11Y' EAST R£NTON LIFE STATII HWAUEOSCIENCES INC. � f ELIMINATION RENTON, WASHINGTON NOT TO SCALE DRAWN BY EFK I"G"" CHECK BY DH 77 PR01EL7 NO, DATE 01.05.11 2009-058-21 APPENDIX A FIELD EXPLORATION RELATIVE DENSITY OR CONSISTENCY VERSUS SPT N-VALUE COHESIONLESS SOILS COHESIVE SOILS Approximate A Approximate Density N (blayslft) Consistency N (blowslft) Llndrained Shear Relative Density(%) Strength (vs� Very Loose 0 to 4 _ _ C �- 15 Very Sol( 0 to 2 s2-% Loose 4 to 1D 15 - 35 Saft 2 to 4 250 - 500 Medium Dense 10 to 3a 35 - 65 Medium Stiff 4 to a Soo - low Dense 30 to 5D 65 - 61 Stiff B to 15 1000 - 2000 Very Dense over 50 85 - 100 Very Slip 15 to 30 2000 - 4000 Hard over 3C >40W USCS SOIL CLASSIFICATION SYSTEM MAJOR DIVISIONS GROUP DESCRIPTIONS Gravel and Gil Welbgraded GRAVEL Coarse Clean Gravel • Grained Gravelly Sails {lithe or no fines) o l Poorly -graded GRAVEL Soils More than 50 k or Coarse Gravel with d GM Sitty GRAVEL Pact& Retained Fines (appredahls onNo. 4Slave amountoflines) GC Clayey GRAVEL Sand and Clean Sand �• Still Wet -graded SAND Sandy Soils (little or no fines) More than ' SIP Pdony-graded SAND 50% Retained 500/ ar More on No Sand with SM Silty SAND 200 Sieve-- 0 Coarse SC Size Fract;on Passing amount of fines) Clayey SAND No 4 Sieve MIL SILT Fine Sill CL Lean CLAY Grained and Liquid Limit Soils Less than 50 % Clay _ — dL Organic SILT1Organid CLAY MN Elesliu SILT 57/. or More Sill Liquid Limit Passing and a More CH Fat CLAY No 200 Sievc Clay50% Size OP Organic SILT/Organic CLAY Highly Organic Soils r it PT PLAT COMPONENT DEFINITIONS COMPONENT SIZE RANGE Boulders Larger than 12 in Cobbles 3 in to 12 in Gravel 3 in to No 4 (4.5mm) Coarse gravel 3 in to 314 in Fine gravel 314 in to No 4 (4.5mm) Sand No. 4 (4.5 mm) to No 2M (D.074 mm) Coarse sand No. 4 (4.5 mm) to No. 10 (2.0 mm) Medium sand No 10 (2,0 mm) to No 40 (0.42 mm) Fine sand No. 40 (0.42 mm) to No 200 (n,074 rl Si@ and Clay Smaller than No. 2W (0.014mm) TEST SYMBOLS %F Percent Fines AL Atterberg Limits PL = Plastic Limit ILL = Liquid Limit CDR California Bearing Ratio CN Consolidation DD Dry Density (pot) DS Direct Shear GS Grain Size Distribution K Permeability MD MoislurelDensity Relationship (Proctor) MR Resilient Modulus POD Pholoionizalion Device Reading PP Pocket Penetrometer Approx. Compressive Strength (Ise SG Specific Gravity TC Triaxial Compression TV Torvane Approx- Shear Strength (ts!) UC Unconfined Compression SAMPLE TYPE SYMBOLS ®2.0" QD Split Spoon (SPT) (140 lb. hammer with 30 in drop) �1 Shelby Tube 9-1/4' OD ;hlii Simon wiL`, Rrrsss Rhigs 0 Small Sag Sample Large Bag (Bull Sample Core Run Non•slandard Penetration Test (3.0" OD split spoon) GROUNDWATER SYMBOLS Q Groundwater Level (measured at time of drilling) 1 Groundwater Level (measured in well or open hole after water level stabilized) COMPONENT PROPORTIONS PROPORTION RANGE DESCRIPTIVE TERMS < 5% Clean 5 - 12% Slightly (Clayey, Silly, Sardy) 12- 30% Clayey, Silty, Sandy, Gravelly 30- 500/1 Very (Clayey, Silty, Sandy, Gravelly) Components are arranged in order of increasing quantities. NOTES: Soil classifications presented on exploration logs are based on visual and laboratory observation. Soil descriptions are presented in the following general order MOISTURE CONTENT Donsity/consistency, color, modifier(irfany) GROUP NAME, additions to group name (it any), moislmrt DRY Absence of moisture, dusty, content. Proportion, gradation, and angufarfh/ circonsG'tuanls, addilienaf comments dry to the touch (GEOLOGIC INTERPRETATION) MOIST Damp but no visible water. Please refer to the discussion in the report text as well as the exploration logs for a more WET Visible free water. usually complete description of subsurface conditions. soil is below water table. LEGEND OF TERMS AND 1 East Renton Lift Sation Elimination SYMBOLS USED ON HWAGEOSIOENCUINIC Renton, Washington EXPLORATION LOGS PROJECT ND.. 2009-058-21 FIGURE: A-1 LEGEND 2009-0581 7J2111 a � c'J � c iL W Z O A}I m 0 o W l U H ID 0 o 0 (;4 0 H A R CI o N n- LJJ m W 0 o F U 1 0 H � C N � I— w o� Y VS M 0 a3ldr�aNnoao ply U (p S-LS31 a3HID LD E :3� NO 1N31NOOCD 3an1SIOW ` ° a 0 oa CL N CP � L � D a38Wnm 37dWbs y co U 3dA13ldWdS v Q r- o � •m LLJ m3 0 C c6 P J I LIE, a I 4 N cl�:zw� t} wmoE g E ¢ dl��' �� �yaZ a� ° LU O o aai2 pl (7 a Z a� a CI r 5 rs d l6 V �i SO C '6 marnm m � u p.— ?2 la n.G 3 Q IDN Esc y> yrn�.Q c rc Z F- ii C sa M's 'm C oc ssrlo lios sasn " (i82�) H1d3Q o as c� m CV s C7 LL ^� I..L Lu f1 0 00 4u I� �E C7 r0 V O 0 a Z H w W w n ca c E s` 0 W O 4 N y ? � o 0 c N 4] CR cl: C� W d z � W con 0 0 '9 k&u >,±� 2 ,Mn 2 ka3 o QQl� #o G G ZE G)2�NO �]2 a&sow - , G0 k/{ 2 ganNeAq / //0 3d225VYVS (=D Eli \) '6S2:-po &s m ±S S ))2G �\ \\ - \&£� ƒ\ kƒ0 «I %\c ( §, / \\OL �\ ca �# ) 7 0 a>m \\ cL - kk{ \\\2 £{§f § z �la;» keg o r e m j f m E R L a 0 Cc CO / 3 f ƒ ƒ / u z 6 z � Un Q � � (400b) H1d30 p m c_ m u' L2 N ...... :..... :..... . .....:.....:......I ..- i -.-..... .....-,.. ............c,.... � .-....?............. ......:I....,....... ....... ..... ..... i ..- -. . -. ... ... a.. :...:.... . ... .. ... .. .. 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U31VMC1NnMJE) S1631 H3H1O m Cl) N Q � 4 (%)1N31NOO N 3lJrIISIOVI o o SO p O Q y IB x—� Z12SVMN 31dINVS N F- a: 3 dA13ldLNVS I V1 Q G_ 0 (D i� I O f] ^ I z Qt cn Z 4 F p 5 OU v Q 1 �} C7 I C J �O C U C y •U F LL y Z'U mod' �O ❑ 2 rr 4 C -T g .0I 2 — � m 7 c41 p c m m w I n' �.• C p y.,V -0 w Y +1 ro� D v m a �° e E w$oE o m cO D o n ✓di 0 C71 .� a a O _ p ro �i j IT, _ ate' ftl N CDQ Qp cn Z w as I> c a� o ' r `� ° W ssro �llos sasn N " ui t= u 1O9"As 0 7 ¢ Z U U LC w w D PSI) H1dBO `° a 4' a) u i 0 LU 0 C fi w ,J O c b cu N cu W z APPENDIX B LABORATORY TESTING u7 0 0 O O N � c N O a0 o0 iD LL N O � n C4 CV O o m V] M V t > cfl v o M (D m a o (L 0 0 U o o ry r d E m Z C) (n O O O C � w p w r � T � O J � J o � � C � N Z v t N 'm co Q or or Z o C7 T L Q =� co z z L O < < r o z 3 0 0 U o Cl O a o F EL Ln fV 0 c-i 0 L6 d [v W (n V7 (n a LO N N d. � a F- a � 0 o O O 0 O O o 0 0 0 O Q) oQ 1- 0 So v m N lH GAA A8 2ONIJ lf\1d3�1dd m r Y VJ CV C.7 Q ❑ Q cn J M WO< co L ❑ O w00 d7 C) W d Q z L) U Hl G/S �z � w � V N 2 C? a 0 N r- O O M m O Q C J G p ftl o co 4Q N M 7 LO do 7 N o to V O co O O r7 cr} r � a i E O O Q --F I J a O i I dC7 L �6 Z Ln O C a � � 17 O o J J Cl � o c I n °' m U_ IN 7 Q_ < .ti Q O fit-. I U,J 3 Nj Cn lL N Z Z CI) Z3 < < 0 W O B W_ m W UJ o f E Q an en a o 0 d V5 5 n o p V Z U o D O — — — — -- 4 -- -- v) o 0 0 E m a W o 0 0 J Lij cV ri ri �' r- -- ------ - -- -- rf1 l! Qy ` cj Lil US U) In [B 0 d U L Q o EL a a ~ t 1HOGAA AS 2ONIA INE083d � 0 m 4 C� N a W Q LU fV 0 Q co co O LU Jp0 0 U H N W (If o d a U W 0 d w ca co LU ti ision f5 L � ET "'IIILU CITY OF RENTON EAST RENTON LIFT STATION ELIMINATION TECHNICAL INFORMATION REPORT TARGETED DRAINAGE REVIEW DRAFT August 2011 1218 THIRD AVENUE • SUITE 1600 • SEATTLE, WASHINGTON 98101-3032 • (206) 684.6532 - FAX (206) 903.0419 px:IlCarDIIDID=menWClienWJAlRentonl8235C10/Delivereble! lTDR_Rpl.doex CITY OF RENTON EAST RENTON LIFT STATION ELIMINATION TECHNICAL INFORMATION REPORT TARGETED DRAINAGE REVIEW TABLE OF CONTENTS Page 1.0 PROJECT OVERVIEW ................................................................................................ 1 1.1 Project Location, Drainage, and Site Characteristics ........................................1 1.2 Project Improvements... ..................................................................................... 1 2.0 CONDITIONS AND REQUIREMENTS SUMMARY .................................................... 5 3.0 OFFSITE ANALYSIS ..................... I .... I ........ I ........... I ... ... I ............................................ 5 4.0 FLOW CONTROL AND WATER QUALITY FACILITY ANALYSIS AND DESIGN ......5 5.0 CONVEYANCE SYSTEM ANALYSIS AND DESIGN ..................................................5 6.0 SPECIAL REPORTS AND STUDIES ............................................................... .......... 5 7.0 OTHER PERMITS ....................................................................................................... 6 8.0 CONSTRUCTION STORMWATER POLLUTION PREVENTION PLAN (CSWPPP) ANALYSISAND DESIGN ............................................................................................ 6 8.1 Erosion and Sediment Control Plan ........ .................. ...................................... 6 8.1.1 Wetland Buffer and Stream Restoration and Stabilization ................. 6 8.2 Stormwater Pollution Prevention and Spill (SWPPS) Plan Design ....................6 9.0 BOND QUANTITIES, FACILITY SUMMARIES, AND DECLARATION OF COVENANT................................................................................................................. 7 10.0 OPERATIONS AND MAINTENANCE MANUAL ..........................................................7 LIST OF FIGURES FigureI Site Location .................................................................................................... 2 Figure2 Site Plan ........................................................................................................... 3 Figure 3 Site Drainage Characteristics .......................................................................... 4 LIST OF APPENDICES APPENDIX A — Reference 8-A Technical Information Report (TIR) Worksheet APPENDIX B — Preliminary East Renton Lift Station Elimination Drawings August 29, 2011 - DRAFT pw:IlCarollo/DommentEdClientlWAJRenbonia235CI 01DeNverab1e&rTDR-Rptdocx CITY OF RENTON TECHNICAL INFORMATION REPORT TARGETED DRAINAGE REVIEW 1.0 PROJECT OVERVIEW The Technical Information Report (TIR) herein includes a limited scope Targeted Drainage Review (TDR) as defined in Table 2.3.2.A of the 2009 King County Surface Water Design Manual (SWDM). The East Renton Lift Station Elimination project (the Project) is defined as a TDR Project Category 1 as it proposes 7,000 square feet or more of land disturbing activity. The TIR Worksheet required by the SWDM is included in Appendix A. A final version of this TIR will be submitted upon completion of construction documents. 1.1 Project Location, Drainage, and Site Characteristics The Project is located in and adjacent to Maplewood Park (the Park) in Renton, Washington and is governed by two authorities, the City of Renton and King County. Construction activities north of the Park are located in the City of Renton, while construction in the Park and to the south is located in unincorporated King County. The Park is a forested, inactive park in the location of the proposed construction. See Figure 1 for an aerial view map identifying the general location of the Project site. Refer to Figure 2 for a detailed plan view of the Project site identifying significant geographic features and critical areas. The Project site is not located within the 100-year floodplain. A City of Renton schematic of the storm drainage system at the Project site is presented in Figure 3. Storm drainage from the Project site is conveyed through the Park via Stewart Creek (the Creek). At the south end of the Park, the Creek discharges to the piped storm drainage system in 148th Place Southeast (SE). Storm drainage is carried through a series of pipelines for approximately 113 mile and discharges at the surface near the intersection of SE 142nd Street and SE 143rd Place. The drainage is conveyed at surface via Stewart Creek for approximately 1 mile and discharges to the Cedar River. Refer to the Project geotechnical report in Section 6.0 of this TDR for information on site soils_ 1.2 Project Improvements The Project includes the construction of approximately 1,030 linear feet of gravity sanitary sewer pipeline to eliminate the use of the East Renton Lift Station. The sewer pipeline follows a curved alignment through the Park to avoid existing wetlands and crosses the Creek at the north end of the Park. Gravity sewer pipelines will be polyvinyl chloride (PVC) and range from 12 to 15 inches in diameter, August 29, 2011 - DRAFT pwilCardWDocumentslChentMlNRenton18235C 1 ClDeliverebieslTDR_Rpt.doa l4k - ! F a I EXIST + �► _ tON woo City of Renton, f ............................................. .... —amiss .................. ..... Unincorporated King County LU Maplewood Park LU N 0 d Maplewood Park C t EAST RENTON c r GRAVITY SEWER � r LU ^1Y s + a ALL - ar _ v10. r w '�► . 3E1 H f� a w uu 5: Ix W Z Q z - w 0 N 85 L Z w a or j 5 a1W 0 m LL o � U) -j W U ag�g� V w LU 51 T�l H ;,} �.' w r a if, l VV � � 8 1 :S u ry$O do-,. 11 i _ `a'J i• l:rl' # _..3at .Z41 . 1 {w{ � It 1 _ ire T a � ✓'��- � -`�'' fJ an IN 1 �p I � �in Z�4 � � � I�II✓!� I CH I I I Y• Y. •i UO 2wuJi v,I I I Y. .. offi � I � ,1 { + R lWD9EZP-Ell LLUBJ N_ E L F` a r ummVIS m��E�o CI 3 C C oao�u�n� to w 0 mn .=Cc c o�a=o r- yyW m E o c C o •V W M C 0 1L j s M:9 V a a O a Cc 2 0. CL C C w 7 0 U a (i V a U c'] U o LL V c LL o� a L m T n ['4� 7 �, �y 4 Nyy a . C 7 W pm7 a 04 p} Ck T mm a w O cn m oc ® o ■ a • ■ Y r ■ O a riJ 3 r l -4 > N CU c� V1 u� T CD Cf) LO t%w CD w LJL z M N Wt H TIM Ln T V¢ o ccnaaw Fcw5; LU CC W �OW0 co dl Z L a_ cc U LL if LLILpO az zQW- �-U U CC C=� P(jH i n W H FiSE - 14T 23N R05E SE 114 x�� I I i u ' i : "r t i As u�rst k JJ ] , -- IT U4� k -Sir- 1- -sst i i I R l TSid rsr51 � I : Y - N V co U Lei Fj ,a a --- - -- -- -- - _. I -- g rig : I d +N86 ~ I 7 i M 3S 3SO2l NEZ IS4 - 359zl R'9U9-VA Gcua, Other project design elements include site clearing and grubbing, wetland buffer and stream mitigation planting, temporary bypass pumping, and decommissioning and demolition of the existing East Renton Lift Station facility. A significant portion of the construction is located within the Park, while the remaining is located within an existing utilities site and a residential street (148th Place SE). A majority of the construction is located within a wetland buffer or stream and will be limited to the dry season only. 2.0 CONDITIONS AND REQUIREMENTS SUMMARY The following include a list of required plans, permits, and approvals concurrently submitted to King County and other agencies for the Project. • Stream and Buffer Restoration Plan (King County) • Clearing and Grading Permit (King County) • Section 404 Permit (United States Army Corps of Engineers) • Hydraulic Project Approval (Washington Department of Fish and Wildlife) • SEPA Checklist (City of Renton) 3.0 OFFSITE ANALYSIS NIA — limited scope TIR per Table 2.3.2.A of SWDM. 4.0 FLOW CONTROL AND WATER QUALITY FACILITY ANALYSIS AND DESIGN NIA — limited scope TIR per Table 2.3.2.A of SWDM. 5.0 CONVEYANCE SYSTEM ANALYSIS AND DESIGN NIA — limited scope TIR per Table 2.3.2.A of SWDM. 6.0 SPECIAL REPORTS AND STUDIES The following reports have been developed by qualified engineering consulting firms for the Project and are available for review upon request. • Final Geotechnical Evaluation Report (HWA GeoSciences, Inc., February 2, 2011) • East Renton Lift Station Elimination Wetland, Stream, and Wildlife Study (ESA Adolfson, Revised June 2011) August 29, 2011 - DRAFT b pu:llCardldDocumenislClienNNAlRenion1B235C10lDel4erablesr rDR_Rpt.docx 7.0 OTHER PERMITS NIA — limited scope TIR per Table 2.3.2.A of SWDM. 8.0 CONSTRUCTION STORMWATER POLLUTION PREVENTION PLAN (CSWPPP) ANALYSIS AND DESIGN The preliminary construction drawings for the Project are included in Appendix B of this TIR and referenced herein. 8.1 Erosion and Sediment Control Plan The erosion and sediment control (ESC) plan is included on Drawing No. C-02. Erosion control measures include silt fencing along the limits of construction through the Park and filter fabric protection for existing catch basins. Stabilized construction entrances will be located at two site access locations. Construction dewatering will require standard methods of sedimentation extraction prior to discharge into the on -site sanitary sewer system. Dust from construction operations will be controlled by watering with water trucks. All ESC work for the Project will be performed in strict accordance with all Federal, State, and local laws and regulations governing waters of the State, as well as permits acquired for the Project. 8.1.1 Wetland Buffer and Stream Restoration and Stabilization As presented in the drawings, the sewer pipeline will be installed beneath the Creek by open cut trenching methods. Following installation of the pipeline in the stream and removal of the temporary stream crossing, the stream bank slope will be protected with coin blankets and planted with live stakes. The backfilled trench in the stream will include controlled low strength material (CLSM) encasement to one foot above the pipeline. Compacted backfill topped with rounded cobble and sand mix for the streambed will occupy the rest of the trench. The trench will be plugged on both ends of the Creek with a concrete cut-off wall to prevent lateral stream migration down the pipeline trench. Stream bank restoration includes the planting of trees and shrubs in the upland area adjacent to the Creek. The majority of the sewer pipeline is located within the King County wetland buffer. Wetland buffer mitigation includes planting trees, shrubs, and hydroseed along the 30-foot wide construction corridor through the Park. 8.2 Stormwater Pollution Prevention and Spill (SWPPS) Plan Design The following construction equipment is anticipated to be used on the project: backhoe, trackhoe, bulldozer, dump truck, concrete truck, and 5 to 10 HP bypass pumps. Staging for construction equipment and materials is proposed on the existing gravel access road north of the Park, at least 50 feet away from streams and wetlands. Construction equipment and workers will access the work area from this gravel road and from 148th Place SE at the south end of the Park. August 29, 2011 - DRAFT 6 pw:llCarolloltloaumenWClient/WAJRenton18235C1610eiiverables(TDR_Rpt.doa As with any construction project, there is potential for water quality contamination due to accidental spills of hydraulic fluid or other materials. In combination with the previously mentioned erosion control measures, the Contractor will utilize the following construction best management practices (BMPs) to avoid and minimize these temporary impacts: Prepare a SWPPS Plan for construction activities, including BMPs in accordance with the latest edition of Ecology's Stormwater Management Manual for Westem Washington. The SWPPS Plan will include elements for drainageway protection and sediment retention. • Comply with the water resource protection requirements of the Stormwater Construction permit from Ecology. • Maintain construction equipment in good working order, free of leaks of fuel, hydraulic fluids, or other chemicals. • Keep fueling and equipment maintenance areas at least 100 feet away from streams and wetlands. • In the unlikely event that a construction accident or spill releases contaminants into waterways or the surrounding environment, BMPs (such as oil booms and adsorbent pillows) would be employed and utilized to contain and minimize the spill. • Route all water from trench dewatering to the existing sanitary sewer system. 9.0 BOND QUANTITIES, FACILITY SUMMARIES, AND DECLARATION OF COVENANT NIA — limited scope TIR per Table 2.3.2.A of SWDM. 10.0 OPERATIONS AND MAINTENANCE MANUAL NIA — limited scope TIR per Table 2.3.2.A of SWDM. August 29, 2011 - DRAFT 7 pw:7/CardlolDocumentslCllentfWAJRenton18235C 101De1ivera41es1 TDR_Rpt.dorx APPENDIX A REFERENCE 8-A TECHNICAL INFORMATION REPORT (TIR) WORKSHEET KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL KING COUNTY, WASHINGTON SURFACE WATER DESIGN MANUAL REFERENCE 8-A TECHNICAL INFORMATION REPORT (TIR) WORKSHEET 2009 Surface Water Design Manual I /9/2009 KING COUNTY. WASHINGTON, SURFACE WATER DESIGN MANUAL. TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 1 PROJECT OWNER AND PROJECT ENGINEER Project Owner C ITy of -q�w rod • D '+vc CMr.rsrAQs" Phone yQ S - y30 - ?021 ,Q Address kaNreW C trY Hf4GL - rx F400< r1,4 19057 Project Engineer_5aiPgn/ C,45EY Company GyrZ0c.1,0 6--A16iNEz-1t,S Phone 503 - a 7 r 198.5 Part 3 TYPE OF PERMIT APPLICATION ❑ Landuse Services Subdivison / Short Subd. / UPD ❑ Building Services M/F / Commerical / SFR 8 Clearing and Grading ❑ Right -of -Way Use ❑ Other Part 2 PROJECT LOCATION AND DESCRIPTION Project Name FRS i DDES Permit # Location Township 3 A/ Range 5 1!5- Section 1 y 9- 15 Site Address 5 E 2 Nn C p a Pk2rC. 148rH rat SE_ 9F/fIMA) laJA MXc Part 4 OTHER REVIEWS AND PERMITS ❑ DFW HPA ❑ Shoreline ❑ COE 404 Management ❑ DOE Dam Safety ❑ Structural ❑ RockeryNaultl FEMA Fbodplain ❑ ESA Section T ❑ COE Wetlands ❑ Other Part 5 PLAN AND REPORT INFORMATION Technical Information Report Site Improvement Plan (Engr. Plans) Type of Drainage Review Full / ar et / Type (circle one): Full 1 Modifi / (circle): Large Site Small Site Date (include revision Date (include revision dates): dates): Date of Final: Date of Final: Part B ADJUSTMENT APPROVALS Type (circle one): Standard / Complex / Preapplication / Experimental / Blanket Description: (include conditions in TIR Section 2) Date of Approval: 2009 Surface Water Design Manual I 1/9/2009 KING COUNTY. WASHINGTON, SURFACE WATER DESIGN MANUAL TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 7 MONITORING REQUIREMENTS Monitoring Required: Yes / No Start Date: Completion Date: Part 8 SITE COMMUNITY AND DRAINAGE BASIN Community Plan: Special District Overlays: Drainage Basin: Stormwater Requirements. Describe: Part9 ONSITE AND ADJACENT SENSITIVE AREAS G River/Stream sr�Wfo, r ckLC TY C nl ❑ Steep Slope ❑ Lake ❑ Erosion Hazard Wetlands _ G q rCG D2 Y ❑ Landslide Hazard ❑ Closed Depression ❑ Coal Mine Hazard ❑ Floodplain ❑ Seismic Hazard ❑ Other ❑ Habitat Protection Part 10 SOILS Soil Type Slopes Erosion Potential High Groundwater Table (within 5 feet) ❑ Sole Source Aquifer ❑ Other ❑ Seeps/Springs ❑ Additional Sheets Attached 2009 Surface Water Design Manual 1/9/2009 2 KING COUNTY. WASHINGTON, SURFACE WATER DESIGN MANUAL, TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 11 DRAINAGE DESIGN LIMITATIONS REFERENCE ❑ Qgre.2 — Offsite AngfXsisT Sensitive/Critical Areas ❑ SEPA ❑ Other ❑ Additional Sheets Attached LIMITATION / SITE CONSTRAINT Part 12 TIR SUMMARY SHEET(provide one TIR Summary Sheet per Threshold Discharge Area Threshold Discharge Area: name or description) Core Requirements (all 8 apply) Discharge at Natural Location Number of Natural Discharge Locations: Offsite Analysis Level: 1 / 2 / 3 dated: Flow Control Level: 1 / 2 / 3 or Exemption Number incl. facility summary sheet Small Site BMPs Conveyance System Spill containment located at: Erosion and Sediment Control E~SC Site Supervisor: Contact Phone: After Hours Phone: Maintenance and Operation Responsibility: Private / Public If Private, Maintenance Log Required: Yes / No Financial Guarantees and Provided: Yes / No Liability Water Quality Type: Basic I Sens. Lake / Enhanced Basicm 1 Bog (include facility summary sheet) or Exemption No. Landscape Management Plan: Yes ! No Special Requirements as applicable) Area Specific Drainage Type: CDA / SOO / MOP I BP / LMP / Shared Fac. ! None Requirements Name: FloodplaintFloodway Delineation Type: Major / Minor / Exemption I None 100-year Base Flood Elevation (or range): Datum: Flood Protection Facilities Describe: Source Control Describe landuse: (comet./industrial landuse) Describe any structural controls: 2009 Surface Water Design Manual 3 1/9/2009 KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL TECHNICAL INFORMATION REPORT (TIR) WWORKSHEET High -use Site: Yes / No Treatment BMP: Maintenance Agreement: Yes / No with whom? Part 13 EROSION AND SEDIMENT CONTROL REQUIREMENTS MINIMUM ESC REQUIREMENTS MINIMUM ESC REQUIREMENTS DURING CONSTRUCTION AFTER CONSTRUCTION ® Clearing Limits Stabilize Exposed Surfaces Cover Measures ® Remove and Restore Temporary ESC Facilities Perimeter Protection ® Clean and Remove Ail Silt and Debris, Ensure Traffic Area Stabilization Operation of Permanent Facilities Sediment Retention ❑ Flag Limits of SAO and open space ® Surface Water Collection preservation areas ❑ Other 6 Dewatering Control G Dust Control ❑ Flow Control Part 14 STORMWATER FACILITY DESCRIPTIONS Note: Include Facili Su mary and Sketch Flow Control Type/ crition Water Qualh T e/Descri lion ❑ Detention ❑ Infiltration ❑ Regional Facility ❑ Shared Facility ❑ Flow Control BMPs ❑ Other ❑ Bioftitration ❑ Wetpool Media Filtration ❑ Oil Control ❑ Spill Control ❑ Flow Control BMPs ❑ Other GR7"Gf IA15 2009 Surface Water Design Manual 4 1/9/2009 KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 15 EASEMENTSITRACTS Fart 16 STRUCTURAL_ ANALYSIS ❑ Drainage Easement ❑ Cast in Place Vault ❑ Covenant ❑ Retaining Wall ❑ Native Growth Protection Covenant ❑ Rockery > 4' High ❑ Tract ❑ Structural on Steep Slope ❑ Other ❑ Other RE 1, or a civil engineer under my supervision, have visited the site. Actual site conditions as observed were incorporated into this worksheet and the attached Technical Information Report. 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The project is to install a new gravity sewer pipeline and eliminate an existing pump station. The new pipeline would cross the central part of Maplewood Park in King County. The Scope of Work for this project included delineating wetlands and streams, assessing wetland functions, and documenting wildlife habitat in the study area. A brief discussion of regulatory implications and permitting considerations is also included in this report. An analysis of project impacts and a mitigation plan are provided in a separate report (ESA. 2011). ' The study area for this project is located in and north of Maplewood Park. Within the park, the study area contains a mixed conifer -deciduous forest crossed by unpaved foot trails. The forest was historically logged and the trees are relatively young. The site contains evidence of other past disturbance including an old concrete building foundation. An overhead power line runs along the western edge of the study area, and a buried gas line also extends north to south through the study corridor. ESA identified seven palustrine forested wetlands (designated Wetlands A through G) and two streams. The wetlands and the onsite streams are hydrologically connected. Surface water flows ' across the site from north to south. Most of the wetlands are located directly adjacent to or near the on -site streams and receive overbank flows as well as groundwater. ' The U.S. Army Corps of Engineers, Washington State Department of Ecology, and Washington Department of Fish and Wildlife regulate alteration of streams or wetlands in the study area. King County critical areas regulations also apply and are summarized in the table below. All of ' the regulatory agencies require applicants to avoid and minimize wetland, stream, and buffer impacts. Areas temporarily impacted by construction must be restored. When permanent impacts are unavoidable, mitigation is required. Summary of Icing County Stream and Wetland Requirements 1 1 1 Aquatic Resource Classification Buffers Wetland Mitigation Ratios Main Stream Type N 65 feet n/a (Stewart Creek) Tributary Type N 65 feet n/a Wetlands A - FG Category II 140 feet 3:1 C Or 1:1 C plus 4:1 E V Wetland mitigation types: C = wetland creation; E = wetland enhancement. These types of wetland mitigation are commonly used. Other types of wetland mitigation are possible, and ratios for these are described in the report text. ESA page tJul), 2011 East Renton Lift Station - Wedwid, .Stream and Wildlife St King County code contains specific requirements for utility crossings of critical areas; for example, construction methods and timing, location of the utility relative to aquatic resource,,, prevention of adverse impacts to stream channels or hydrology. and tree removal. King County requires a permit for clearing or grading within wetlands, aquatic areas, and their buffers. No streams or wetlands are located in the portion of the study area in City of Renton jurisdiction, north of Maplewood Park. King County regulated buffers for the streams and wetlands in the park extend north into the city limits. page ii ESA Jule 2011 I East Renton Liji suatiun - 11'etland, stream and 11'ilcllifil stildlI ■ ■ CONTENTS 1.0 PROJECT AUTHORIZATION AND ,SCOPE OF WORK.......................................................1 2.0 SITE DESCRIPTION....................................................................................................................1 3.0 WETLAND DEFINITION AND REGULATIONS....................................................................1 ' 4.0 METHODS.....................................................................................................................................2 4.1 REVIr:w OF EXIST[NG INFORMATION..................................................................................................... 2 4.2 ON -SITE INVESTIGATION.............................................................. 2 ' 4.2.1 Determining the Presence of'Wetlands and Delineatitag Wetland Boundaries ..................... 2 4.2.2 Classifying Wetlands...........................................................................................................- 3 4.2.3 Assessing Wetland Functions................................................................................................3 5.0 FINDINGS................................................................................................ i.......i ..........; .................4 5.1 EXISTING INFORMATION . 4 5.1.1 suils.......................................................................................................................................4 5.1.2 Streams and Fr.tih................................................................................................................... 4 5.1.3 Wetlands................................................................................................................................4 5.1.4 Wildlife....................._..._._._......._.................................4 5.2 FIELD INVESTIGATION...........................................................................................................................4 5.2.1 Wetland A.............................................................................................................................. 5.2.2 Wetland B.............................................................................................................................. 6 6 5.2.3 Wetland C.............................................................................................................................. 7 5.2.4 Wetland D.............................................................................................................................. 7 1 5.2.5 Wedand E.............................................................................................................................. S 5.2.6 Wetland F.............................................................................................................................. 9 5.2.7 Wetland G............................................................................................................................ 10 5.2.8 Wetland Functions............................................................................................................... 10 5.3 STREAMS AND OTHER AQUATIC FEATURES........................................................................................ 11 5.4 UPLAND DESCRIPTION........................................................................................................................ 1 1 5.5 WILDLIFF............................................................................................................................................12 6.0 REGULATORY IMPLICATIONS............................................................................................12 6.1 FEDERAL REGULATIONS..................................................................................................................... 13 6.2 STATE REGULATIONS.......................................................................................................................... 13 6.3 LOCAI.RUGULATIONS........................................................................................................................13 6,3.1 City of Renton...................................................................................................................... 13 0. 3.2 Kiaag Countv—...................................................................................................................... 14 1 7.0 LIMITATIONS............................................................................................................................16 8.0 REFERENCES.............................................................................................................................16 FIGURES AND PHOTOGRAPHS.........................................................................................................19 APPENDIX A: METHODS USED TO EVALUATE WETLAND CHARACTERISTICS.............A-1 APPENDIX B: COMMON AND SCIENTIFIC NAMES OF PLANTS AND THEIR WETLAND INDICATOR STATUS...............................................................................................B-1 ' APPENDIX C: WASHINGTON STATE WETLAND RATING SYSTEM AND RATING FORMS.........................................................................................................................C-1 APPENDIX D: WETLAND DETERMINATION DATA SHEETS...................................................D-1 ' APPENDIX E: STEWART CREEK FISH USE MEMO....................................................................E-1 ESA page iii IJu1}' 2011 East Renton Lifr Station - Werland, Stf-rcrfn cuad Wildlife Study LIST OF FIGURES 1 Vicinity Map 2 NRCS Soils 3 City of Renton Stormwater Map 4 NWI and King County Wetland Mapping 5 Streams, Wetlands and Buffers 1?age h, ESA July 2011 1 Ease Renimi Lift Stotiou - Welland, .Stream and Wildlrt(' Stith' 1 1.0 PROJECT AUTHORIZATION AND SCOPE OF WORK At the request of Carollo Engineers and the City of Renton Public Works Department, ESA ' prepared this technical report for the East Renton Lift Station Elimination project located in King County and Renton, Washington. The project is to install a new gravity sewer pipeline and eliminate an existing pump station. The new pipeline would cross the central part of Maplewood Park in King County. The Scope of Work for this project included delineating wetlands and streams, assessing wetland functions, and documenting wildlife habitat in the study area. A brief discussion of regulatory implications and permitting considerations is also included in this report. An analysis of project impacts and a mitigation plan are provided in a separate report (ESA, 2011). 2.0 SITE DESCRIPTION The study area for this project is located in and north of Maplewood Park (Figure 1). The study area is located on a plateau on the north side of the Cedar River valley, within Water Resource Inventory Area (WRIA 8) — Cedar/Sammamish River drainage. The northern boundary of Maplewood Park corresponds with the Renton city limits. Maplewood Park is an approximately 45-acre King County park that is surrounded by residential developments. Maplewood Heights Elementary School lies adjacent to the northwest side of the park. Developed recreation facilities including picnic areas and playfields are located in the southwest portion of the park. The study area for this project is a north -south corridor approximately 300 feet wide located in the central, undeveloped portion of the park. The corridor connects an existing City of Renton pump station located just north of the park to an existing sewer line within 148`f' Place SE south of the park. The limits of the study area corridor were established during a site meeting attended by ESA Adolfson, Carollo Engineers, and PACE Engineers staff in April 2009. The study area contains a mixed conifer -deciduous forest crossed by unpaved foot trails. The forest was historically logged and the trees are relatively young. The site contains evidence of other past disturbance including an old concrete building foundation. An overhead power line runs along the western edge of the study area, and a buried gas line also extends north to south through the study corridor. A stream (Stewart Creek) flows through the study area from north to south. Several wetlands are associated with the stream, as discussed below. Elevations range from 400 feet at the north end of the study area down to 378 feet at the south end of the study area. 3.0 WETLAND DEFINITION AND REGULATIONS The characteristics of an area that result in its classification as "wetland" have been formally defined by federal and state agencies, as described in Appendix A. Numerous federal, state, and local regulations govern development and other activities in or near wetlands; at each level, there ESA page 1 Jule 2011 East Renton Lift Stalion - Wctland, Stream and Wildlifi, Studs' 1 are typically several agencies charged with such powers. Specific regulatory implications concerning the subject property are summarized later in this report. 4.0 METHODS Two levels of investigation were conducted for the analysis of wetlands, streams, and wildlife habitat in the study area: a review of existing information and an on -site investigation. 4.1 Review of Existing Information ' ESA reviewed existing literature, maps, and other materials to identify streams, wetlands, or site characteristics indicative of wetlands on the subject property. These sources can only indicate the likelihood of the presence of wetlands; actual wetland determinations must be based upon data obtained from field investigations. Several documents were reviewed: • Soil Survey of King County Area, Washington (Snyder et al., 1973); • Hydric Soils of the State of Washington (NRCS, 1995); • National Wetland Inventory mapping (USFWS, 2007); • King County critical areas mapping; • Washington Department of Fish and Wildlife mapping of priority habitats and species (WDFW, 2008); and • Washington Department of Natural Resources mapping of rare plant communities (WDNR, 2008). 4.2 On -site Investigation 4.2.1 Determining the Presence of Wetlands and Delineating Wetland Boundaries Methods defined in the Washington State Wetlands Identification and Delineation Manual (Ecology, 1997) were used to determine the presence and extent of wetlands in the study area. Washington state and all local governments must use the state delineation manual to implement the Shoreline Management Act and/or the local regulations adopted pursuant to the Growth Management Act. The Washington state manual is consistent with the U.S. Army Corps of Engineers Wetlands Delineation Manual (Environmental Laboratory, 1987). The Corps has been working with states, federal agencies, and others to develop supplemental regional criteria to refine the 1987 delineation manual. Two regions fall within the state of Washington: The Arid West (dry lands west of the Continental Divide, from Idaho and eastern Washington south to the U.S. - Mexico border) and the Western Mountains, Valleys, and Coast. Interim Regional Supplements to the Corps of Engineers 1987 Wetlands Delineation Manual have been completed by the Corps for both regions in Washington, and the appropriate supplement is now used, along with the 1 1 1 1 1 1 1 1 1 1 I page 2 ESA MY 2011 I Easi Renton Lift Station - Wetland, Stream and Wildlife Study Washington State Delineation Manual, when conducting delineations in those regions (Corps, 2008), The methodology outlined in the manuals is based upon three essential characteristics of wetlands: (1) hydrophytic vegetation; (2) hydric soils; and (3) wetland hydrology. Field indicators of these three characteristics must all be present in order to determine that an area is a wetland (unless problem areas or atypical situations are encountered). The "routine on -site determination method" was used to determine the wetland boundaries. The routine method is used for areas equal to or less than five acres in size, or for larger areas with relatively homogeneous vegetative, soil, and hydrologic properties. Formal data plots were established where information regarding each of the three wetland parameters (vegetation, soils, and hydrology) was recorded. This information was used to ' distinguish wetlands from non -wetlands. Where wetlands were determined to be present on the subject property, the wetland boundaries were delineated. Wetland boundaries were identified with sequentially numbered colored flagging imprinted with the words WETLAND DELINEATION. Data plot locations were also marked with colored flagging. The methods used to assess wetland characteristics are described in greater detail in Appendix A. Please note that common plant names are used throughout this text; the scientific names are presented in Appendix B. 4.2.2 Classifying Wetlands Two classification systems are commonly used to describe wetlands. The hydrogeomorphic (HGM) system describes wetlands in terms of their position in the landscape and the movement of water in the wetland (Brinson, 1993). The U.S. Fish and Wildlife Service classification system (Cowardin et al., 1979) describes wetlands in terms of their vegetation communities; these include, for example, emergent, scrub -shrub, and forested community types. 4.2.3 Assessing Wetland Functions Wetlands and buffers play important roles that provide valuable benefits to the environment and society. Because detailed scientific knowledge of wetland functions is limited, evaluations of the functions of individual wetlands are somewhat qualitative and dependent upon professional j udgment. For this project, wetland functions were assessed using the Washington State Department of I Ecology's Wetland Ratitzg System for Western Washington (Hruby, 2004). Although Ibis system is designed to rate wetlands, it is based on whether a particular wetland performs a particular - function and the relative level to which the function is performed. An assessment of wetland functions is inherent in the rating system. This system was developed by Ecology to differentiate wetlands based on their sensitivity to disturbance, their significance, their rarity, our ability to replace them, and the beneficial functions they provide to society. Appendix C provides additional information about the rating system wetland categories and completed rating forms for the project. 1 ESA page 3 ' July- 2011 East Renton Lifr Stafion - Weiland, Stream and Wildlife Slush 1 5.0 FINDINGS 5.1 Existing Information 5.1.1 Soils The Natural Resources Conservation Service (NRCS) maps soils in the study area as Alderwood gravelly sandy loam, 6 to 15 percent slopes (Figure 2), This soil type is not considered hydric but may contain unmapped small areas (inclusions) of hydric soils (NRCS, 2009). 5.1.2 Streams and Fish The study area is located within the Cedar River watershed. The Cedar River supports Chinook salmon (federally listed as threatened), coho salmon, sockeye salmon, bull trout/Dolly Varden (federally listed threatened), and winter steelhead (federally listed threatened) (WDFW, 2009). Stewart Creek is a tributary of the Cedar River. Neither King County nor the City of Renton has mapped the upper part of Stewart Creek where it flows through Maplewood Park. The City of Renton stormwater mapping shows Stewart Creek as an open channel beginning approximately 1,500 feet (0.3 mile) south of Maplewood Park. The stream is mapped as flowing through a steep ravine along the west side of 154'h Place SE for approximately 0.75 mile before joining. the Cedar River on the north side of SE Jones Place (Figure 3). WDFW does not map fish use in Stewart Creek (WDFW, 2008, 2009). 5.1.3 Wetlands King County and the National Wetland Inventory map riparian wetlands along the Cedar River, as well as scattered wetlands on the plateau north of the valley (Figure 4). No wetlands are mapped within Maplewood Park or the study area. 5.1.4 Wildlife The WDFW priority habitats and species (PHS) database does not identify sensitive species or habitats within Maplewood Park or the immediate vicinity. Bald eagles, which are protected by state and federal law, use the Cedar River. WDFW maps riparian areas, a type of priority habitat, along the river, as well as wetlands and vegetated corridors (urban natural open space) (WDFW, 2008). 5.2 Field Investigation t The following sections describe the results of the field investigation conducted by ESA Adolfson biologists Sara Noland, Rosemary Baker, and Steve Krueger on the East Renton Lift Station site on April 29, May 5, May 7, May 8, and June 19, 2009; and March 29 and March 31, 2011, These sections describe the wetlands and stream identified on the site, upland habitats, and wildlife observations. Seven wetlands and two streams were identified within the study area boundaries (Figure 5). ' Pace Engineers, Inc. surveyed the wetland and stream boundary flags. Fourteen data plots were page 4 ESA Jell, 2017 1 1 1 1 1 1 1 1 Errs! Renton Lift Station - Welland, Strecrrri cardlifclfife Strrdv established within relatively uniform areas of vegetation on the site. Data sheets for each of the formal data plots evaluated for this project are provided in Appendix D. Photos of each of the wetlands are attached at the end of this report. Table 1 summarizes the characteristics of the onsite wetlands. Each wetland is described following the table. In general, the wetlands and the onsite streams are hydrologically connected. Surface water flows across the site from north to south. Most of the wetlands are located directly adjacent to or near the on -site streams and receive overbank flows as we] I as groundwater. The wetlands are also connected by a young but relatively intact forested community that extends across most of the park. Table 1. Wetland Summary Wetland ID Size HGM Class Cowardin Class and (sq. ft.) Dominant Vegetation 3,490 onsite Slope/ PFO: red alder, black A (approx. 7,000 Depressional cottonwood, salmonberry, total) cascara, Douglas' spirea Slope/ PFO: black cottonwood, B 6,540 Depressional! Pacific ninebark, salmonberry, Riverine willow, Himalayan blackberry C 190 Depressional PFO: red alder Slope/ PFO: black cottonwood, red D 2,600 Depressional/ alder, Pacific ninebark, Riverine salmonberry, red -osier dogwood, creeping buttercup Slope/ PFO: black cottonwood, red Depressional/ alder, western red cedar, E 11,050 Riverine salmonberry, Pacific ninebark, red elderberry, lady fern, sword fern, sedges Slope/ PFO: black cottonwood, red F 6,170 Depressional/ alder, Douglas' spirea, Pacific Riverine ninebark, sword fern, Himalayan blackberry Slope/ PFO: black cottonwood, red G 2,200 Depressional/ alder, Douglas' spirea Riverine FSA page 5 ' Julyy 2011 1 East Renton Lift Statiolr - Welland, So -cum and Wildlije Studi 5.2.1 Wetland A Wetland A is a palustrine forested (PFO) wetland located in the southern part of the study area. The wetland extends offsite to the east of the study corridor. The onsite portion of the wetland is 3,490 square feet. The total wetland size is approximately 7,000 square feet. The hydrogeomorphic classification of this wetland is slope and depressional. A shallow Swale that is also used as an informal foot trail runs through the southern portion of the wetland. Data Plot (DP) 2 represents the wetland community, and DP 1 represents the upland community adjacent to Wetland A. 5.2.1.1 Hydrology The hydrology of Wetland A is supported by surface flows from upslope areas to the east during heavy rain events, as well as a seasonally high groundwater table. No surface inundation was observed in the wetland in April 2009. However, during early May 2009, following a rainy period, approximately two inches of surface water was flowing through the shallow swale within the wetland to enter the onsite stream. The lower part of the Swale adjacent to the stream is armored with concrete. In addition to observations of surface inundation, other hydrology indicators included sediment deposits, drift deposits, water stained leaves, and algal growth on bare soils. 5.2.1.2 Soils Soils sampled in Wetland A appeared to have been disturbed by past land uses, probably logging, grading, and burning. The soil profile at DP 2 consisted of silty loam and silty fine sand. From the surface to four inches deep, the soil color was very dark brown (1OYR 212). From four to 10 inches deep, soil colors were a mixture of very dark grayish brown, dark brown, and dark yellowish brown (IOYR 3/2, 3/3, and 3/4); charcoal was evident in this soil layer. The lower portion of the soil profile (10 to 16 inches) was dark brown (IOYR 3/3) with concretions. These soils do not match the NRCS description of the Alderwood gravelly sandy loam that is mapped in this area. Water was seeping into the bottom of the soil pit. Given the strong evidence of wetland hydrology and vegetation, as well as evidence of past soil disturbance, we assumed that soils were hydric in this area. 5.2.1.3 Vegetation Wetland A contains an immature forested community dominated by red alder and black cottonwood. The understory is composed mainly of salmonberry with some cascara and Douglas' spirea. Herbaceous cover is sparse and dominated by sedges. The shallow Swale within the wetland contains sparse sedges with a forest overstory. 5.2.2 Wetland B Wetland B is a palustrine forested (PFO) wetland 6,540 square feet in size (Figure 5). The hydrogeomoiphic classification of this wetland is a combination of slope, depressional, and riverine. The onsite stream bisects the wetland, and an unpaved foot trail runs parallel to the east side of the stream. Data Plot (DP) 3 represents the wetland community. Upland areas near Wetland B are represented by DP 6 and DP 12. 1 u 1 1 page G ESA Jul}, 2011 1 East Renlou Lift Station - Wvr and. Stream wid VWWI fi, Stints 5.2.2. 1 Hydrology The hydrology of Wetland B is supported by groundwater, surface runoff, and overbank flows from the stream during heavy rain events. During early May 2009, we observed shallow surface water flowing downslope along the foot trail through Wetland B, along with areas of ponding. Other hydrology indicators included sediment deposits, drift deposits, water -stained leaves, and drainage patterns. 1 5.2.2.2 Soils Soils at the sampling plot in Wetland B (DP 3) consisted of a layer of silty sandy loam from the surface to 12 inches deep, with gravelly sand from 12 to 18 inches. It appeared that surface flows deposit silt in this part of the wetland. Soils colors were very dark brown (10YR 2/2) in the top layer and olive brown (2.5Y 4/4) with redoximor-phic features (concentrations) in the lower layer. The soil had a Stripped matrix, indicating hydric conditions. These soils have been disturbed and do not match the NRCS description of the Alderwood gravelly sandy loam that is mapped in this I area. 5.2.2.3 Veg etq ation 1 1 I 1 I 1 1 Wetland B is a palustrine forested wetland of primarily black cottonwood with an understory of Pacific ninebark, salmonberry, willow, and Himalayan blackberry. The vegetation community is dominated by hydrophytic plant species. 5.2.3 Wetland C Wetland C is a palustrine forested (PFO) wetland 190 square feet in size (Figure 5). The hydrogeomorphic classification of this wetland is depressional. No data plots were completed for this wetland due to its small size and similarity to other wetlands in the study area. 5.2.3.1 Hydrolocly The hydrology of Wetland C is supported by groundwater and surface runoff. During early May 2009, we observed ponding a few inches deep within the wetland. 5.2.3.2 Soils Similar to Wetland A, soils in Wetland C appeared highly disturbed as a result of past grading and logging.. 5.2.3.3 ,Vegetation Wetland C is. sparsely vegetated and has a forest overstory of red alder. 5.2.4 Wetland D Wetland D is a palustrine forested (PFO) wetland 2,600 square feet in sire. Wetland D is a slope wetland containing two depressions which may have been excavated in the past. The wetland is represented by DP 5 and DP 13 (Figure 5). ESA page 7 JulY 2011 East Renton Lift Station - Weriaxd, Stl'eam and Wildlife StudY 5.2.4.1 Hydrology The hydrology of Wetland D is supported by overbank flow from the stream, groundwater, and surface runoff from surrounding uplands. In April 2009, hydrology indicators at DP 5 included soil saturation at nine inches depth, as well as sediment deposits and water -stained leaves within the depressions. In May 2009, ponding was present within the depressions, and groundwater was seeping from the adjacent slope into the northeastern part of the wetland. At DP 13, completed in May, hydrology indicators included a water table at 12 inches depth and soil saturation at 7 inches depth. The wetland is within a few feet of the stream and likely receives overbank flooding during storms. 5.2.4.2 Soils Soils in Wetland D appeared disturbed, likely as a result of past grading and logging. At DP 5, soils were sandy silt in the upper part with gravelly sand below, and a mix of matrix colors and charcoal. At DP 13, soil matrix colors were also mixed and included mucky mineral (organic) material and oxidized root channels, both indicators of hydric conditions. These soils do not match the NRCS description of the Alderwood gravelly sandy loam that is mapped in this area. 5.2.4.3 Vegetation Wetland D has a canopy dominated by black cottonwood and red alder. The southern part of the wetland has an understory of Pacific ninebark, salmonberry, and red -osier dogwood, while the northern part of the wetland has sparse shrubs and more emergent species such as creeping buttercup. 5.2.5 Wetland E Wetland E is a palustrine forested (PFO) wetland 11,050 square feet in size (Figure 5). The hydrogeomorphic classification of this wetland is depressional, slope, and riverine. The wetland is associated with the northern part of the onsite stream. Wetland E is represented by DP 8 and DP 9. 5.2.5.1 Hydrology The onsite stream (Stewart Creek) enters the northwest portion of Wetland E and exits the southeast portion of the wetland (Figure 5). A defined stream channel is lacking in the center of the wetland, and surface water sheet flows through this area. The hydrology of Wetland E is supported by a high groundwater table and surface runoff, including overbank flows from the stream during heavy rain events, as was observed in May 2009. In addition to observations of surface ponding up to several inches deep within the wetland, hydrology indicators observed at the data plots included soil saturation near the surface and a high water table. 5.2.5.2 Soils Soils in Wetland E at DP 8 were a black (1 OYR 2/1) silt loam from the surface to four inches deep, and a brown (1 OYR 4/3) gravelly silty sand with redoximorphic features from four to 16 1 1 1 I 1 1 1 page8 ESA JOY 2011 ' 1 1 East R(71 on 1Jft Station - Vilefland, Stream and Wil inches deep. At DP 9, soils were black (1 OYR 2/1) silty clay loam and gravelly sandy loam from the surface to 15 inches deep; below 15 inches, the soil was black (7.5YR 2.5/1) silty loam. These observations indicate the presence of hydric sails. These soils do not match the NRCS description of the Alderwood gravelly sandy loam that is mapped in this area. 5.2.5.3 Vegetation Similar to other wetlands in the study area, Wetland E is a forested wetland with all overstory of black cottonwood and red alder, as well as some western red cedar. The dominant understory species is salmonberry, with some Pacific ninebark and red elderberry. Ground cover is sparse and includes lady fern, sword fern, and sedges, 5.2.6 Wetland F Wetland F is a palustrine forested (PFQ) wetland 6,170 square feet in size (Figure 5). The hydrogeomorphic classification of this wetland is slope, depressional, and riverine. DP 11 represents the wetland community. 5.2.6 t Hydrology The hydrology of Wetland F is supported by a high groundwater table and surface runoff. Hydrology indicators at DP 11 included surface ponding two inches deep, a water table at five inches below the surface, and soil saturation to the surface. Sediment deposits, water -stained leaves, and drainage patterns were also present. Following a rain storm in early May 2009, we observed surface water flowing south from the tributary stream adjacent to Wetland G, over a foot trail and into Wetland F. (The hydrologic connection between the tributary and Wetland F is not shown on Figure 5 because water sheet flows across the trail and there is no defined channel in this area.) 1 5.2.6.2 Soils Soils at DP 1 I had a high organic content in the upper layer, and streaks of organic material in the lower layers, indicating past disturbance of the soil profile. From the surface to five inches deep, the soil was a very dark brown (1 OYR 2/2) silt loam. From five to eight inches deep the soil was a very dark grayish brown (l OYR 3/2) gravelly silt. Soil in the lower layer (eight to 16 inches) was a dark yellowish brown (I OYR 314) gravelly sandy loam with cobbles. These soils do not match the NRCS description of the Alder -wood gravelly sandy loam that is mapped in this area. The organic content of the sampled soils is similar to the hydric soil indicator for mucky mineral soil. 5.2.6.3 Vegetation Wetland F is a forested wetland dominated by black cottonwood and red alder. The understory is primarily Douglas' spirea, Pacific ninebark, and sword fern. This wetland has been heavily disturbed by past clearing and grading, and much of the vegetation community is dominated by Himalayan blackberry. i ESA page 9 JWY 2011 East Renton Lift Stution - Wetland, Stream and Wildlife 5.2.7 Wetland G Wetland G is a palustrine forested (PFO) wetland 2,200 square feet in size (Figure 5). The wetland is located adjacent to the onsite stream and contains a separate small tributary drainage. The hydrogeomorphic classification of this wetland is a combination of depressional, slope, and riverine. This wetland is just north of Wetland F and has similar plant communities and soils; therefore no data plot was completed. 5.2.7. 1 Hydrology The hydrology of Wetland G is supported by a high groundwater table and surface runoff, including overbank flooding from the onsite stream and the small tributary. Hydrology indicators included surface ponding, drainage patterns, and sediment deposits. As stated earlier, following a rain storm in early May 2009, surface water sheet flowed south from the tributary stream adjacent to Wetland G, over a foot trail and into Wetland F. 5.2.7.2 Soils Soils in Wetland G were similar to those in Wetland F, described above. 5.2.7.3 Vegetation Wetland G is a forested wetland dominated by black cottonwood and red alder. The understory is primarily Douglas' spirea. 5.2.8 Wetland Functions The seven wetlands and streams identified in the East Renton Lift Station study area are located close together and are hydrologically connected via surface water and probably groundwater during the rainy season. The vegetation communities within and surrounding the wetlands are very similar. All of the wetlands within the study area appear to function together as a system. Therefore, all of the wetlands were rated as one unit in accordance with the guidance for wetland mosaics in the Washington State Wetland Rating System (Hruby, 2004). The wetland rating form and sketches of each wetland are provided in Appendix C, The wetlands in the study area received a relatively high score for water quality improvement. Portions of the wetlands contain clay and organic soils and areas of seasonal ponding that allow for the chemical processes that can remove pollutants from surface runoff. The persistent, dense vegetation in most of the wetland area also serves to slow and filter runoff. The wetlands have the opportunity to remove pollutants from runoff that comes from nearby residential developments. The hydrologic functions of the wetlands were rated moderately high because the wetlands can store some surface flows, helping to prevent flooding downstream. Again the opportunity for the wetlands to provide this function is present because there are large developed areas immediately upstream and downstream of the site. This wetland system has high wildlife habitat functions because it provides a multi -layered forest with trees, shrubs, and ground cover vegetation. Much of the wetland vegetation consists of 1 1 1 I 1 1 1 page 10 ESA July 2011 ' i East Renton Li11 Station - Wetland, Strc°am and Wildlife SM(A native species, with invasive species such as Himalayan blackberry limited to areas of past disturbance, particularly on the north and south edges of the site. The wetlands and streams also provide riparian and aquatic habitats, and there are snags and downed wood that provide additional habitat structures. 5.3 Streams and Other Aquatic Features Stewart Creek flows from north to south through the study area (Figure 5). A small unnamed tributary_joins Stewart Creek north of Wetland G. Representative photos of the streams are attached at the end of this report. The Stewart Creek stream channel averages approximately five feet wide, with portions of the channel in the northern part of the site up to 15 feet in width. As the stream passes through Wetland E, the channel becomes undefined and braided, such that water sheet flows through the wetland. Water was flowing in the channel during all of our site visits. Following rains in early May, surface water overflowed the stream banks and flooded into some of the onsite wetlands. The bottom of the stream channel is composed of sand and gravel. In some areas the channel is incised up to three feet deep, and there are areas of bank scouring. Stewart Creek enters the northern end of the study area via a plastic culvert, and exits the southern end of the study area via a grated concrete culvert. The stream then enters the storm drain system south of Maplewood Park. City of Renton mapping shows that Stewart Creek daylights approximately 1,500 feet (0.3 mile) south of the park and flows through a steep ravine along the west side of 1541" Place SE before joining the Cedar River (Figure 3). The small tributary crossing through Wetland G (Figure 5) was dry during April but contained a few inches of flowing water- in early May. The tributary is three feet wide with a gravel bottom and appears to have formed as a result of overbank flows from the main stream. The riparian area along both Stewart Creek and the tributary consists of native forest and wetlands. ESA staff met with WDFW biologist Larry Fisher on March 23, 2011, to discuss the potential for the onsite streams to support fish. Based on guidance from WDFW, ESA fisheries biologist Steve Krueger used minnow traps and visual observations to evaluate fish use of Stewart Creek. No fish were observed (Appendix E). Two detention ponds are located north of the study area (Figure 5). These ponds were artificially created in upland and would not be regulated as wetlands. 5.4 Upland Description Upland communities in the study area are represented by DP 1, 4, b, 7, 10, 12, and I (Figure 5). Photos of upland areas on the site are attached at the end of this report. The uplands in the study 1 area consist of two main community types: native, mixed conifer and deciduous forest; and cleared areas dominated by invasive vegetation. Native forest is dominant across most of the site, with invasive species present mainly at the north and south site boundaries and along foot trails. Within the native forest, dominant trees include red alder, black cottonwood, Douglas fir, western hemlock, and western red cedar. The forest community is fairly young, although some ESA page 11 IJOY 2011 East Renton Lrfi Station - Wetland, Stream and Wildlife StudY of the Douglas fir trees are large. Understory species include salal, snowberry, salmonberry, Oregon grape, and sword fern. Portions of the forest are open and parklike, while a dense understory is present in other areas. Unpaved foot trails parallel the stream and branch off into the rest of the park. The invasive herbaceous species herb Robert is present along the foot trails. The southern portion of the study area has been quite disturbed by past clearing and grading. Soils in this area were compacted, and the vegetation is dominated by non-native invasive species such as Himalayan blackberry and Scot's broom, as well as native trailing blackberry. An infestation of yellow archangel (an invasive vine sold in ornamental flower baskets) was noted adjacent to the fence along the southern boundary of the study area. This species often becomes established as a result of homeowners dumping yard waste into the adjacent forest. 5.5 Wildlife ESA observed several bird species in the study area, including spotted towhee, American robin (nesting), song sparrow, American crow, black -capped chickadee, Anna's hummingbird, red - breasted sapsucker (excavations in trees), and Steller's jay. Mammals observed onsite included rabbit, raccoon (tracks), coyote (scat), and deer (tracks). Pacific treefrog calls were heard near the stream. Other species of birds, mammals, reptiles, and amphibians in addition to those observed are expected to use habitat on the project site. For example, nocturnal species may be present that were not active during the site visit, or other species may only be highly visible or present in this area during certain seasons. The site provides a relatively large and undisturbed forested area within a developed landscape. The combination of forest, stream, and wetlands contributes to the habitat value of the site. We observed several people using the foot trails and there was sonic garbage on the site, so there is some human disturbance of wildlife on the site. Domestic cats and dogs may also disturb wildlife on the site. In addition, the detention ponds north of the site provide habitat for species such as mallard, and songbirds such as cedar waxwing likely use the fringe of young alders near the eastern pond for perching and feeding on insects. 6.0 REGULATORY IMPLICATIONS Wetlands are regulated at the federal, state, and local levels. Agencies with jurisdiction for this project include the U.S. Army Corps of Engineers (Corps), Washington State Department of Ecology (Ecology), City of Renton, and King County. The Washington Department of Fish and Wildlife regulates work within streams. Regulatory implications associated with development in wetlands, streams, or buffers include, but may not be limited to, those discussed in this section. All applicable permits should be obtained prior to developing or otherwise altering streams or wetlands. fl 1 1 1 1 page12 ESA July 2011 0 11 East Rewori Lift Stariori - VV',tkmd, Strvam raid Wildlife Studs 6.1 Federal Regulations The Corps regulates discharges of dredged or fill materials into waters of the United States, including wetlands, under Section 404 of the Clean Water Act. The purpose of the Clean Water Act is to "restore and maintain the chemical, physical, and biological integrity of the Nation's waters." A Section 404 permit may be required if a proposed project involves filling wetlands or altering streambeds or other waters of the U.S. The Corps will determine if wetlands are jurisdictional under Section 404 based upon the presence of a "significant nexus" to navigable waters (EPA and Corps, June 5, 2007). The Corps has established two types of permit programs under Section 404: nationwide and individual. Nationwide permits are issued when a proposed activity will have minimal adverse impacts to wetlands. All other projects are evaluated under the individual permitting process. The Corps determines which permitting process is used for a proposed project. The Corps will require that wetland impacts be avoided or minimized to the extent practicable, and mitigation will likely be required for unavoidable wetland impacts. 1 6.2 State Regulations The state certification process under Section 401 of the federal Clean Water Act is usually triggered through a Section 404 permit application. Section 401 directs each state to certify that proposed in -water activities will not adversely affect water quality or violate state aquatic I protection laws. In Washington State, Ecology is responsible for administering the state certification program. Ecology may issue approval, approval with conditions, denial, or a request for delay due to lack of information. Any conditions attached to the 401 certification become part of the Section 404 permit. King County is one of the 15 coastal counties in Washington regulated under the Washington State Coastal Zone Management (CZM) Program. Activities that would affect coastal resources and involve approvals from the federal government (such as a Section 404 permit) must be evaluated for CZM compliance through a process called "federal consistency." The Washington State Department of Ecology administers the CZM program in this state. If relocation or alteration of stream culverts or other in -stream work is proposed as part of the project, a Hydraulic Project Approval (HPA) would be required from the Washington Department of Fish and Wildlife under the state Hydraulic Code (RCW 77.55, WAC 220-1 10). 6.3 Local Regulations Two local jurisdictions are involved in the proposed project: the City of Renton for work north of Maplewood Park, and King County, as the current owner of Maplewood Park. This section presents wetland, stream, wildlife, and tree protection regulations of each jurisdiction as applicable. i6.3.1 City of Renton The City of Renton regulates critical areas under Renton Municipal Code (RMC) 4-3-050. No istreams or regulated wetlands are located in the study area north of the park. The two detention ■ E:SA page 13 Juli• 2011 East Renton Lift Station - Wetland, Stream and Wild ponds located north of the park appear to be artificial drainage features created in upland, and would therefore be exempt from City regulation under RMC 4-3-050(M)(1)(e). The City defines critical habitats to include Category 1 wetlands, and habitats associated with the documented presence of non-salmonid species that are proposed or listed by federal or state governments as endangered, threatened, candidate, sensitive, monitor, or priority species (RMC 4-3-050(K)(1)). The study area north of Maplewood Park does not contain any critical habitats under this definition. King County regulated buffers for the streams and wetlands in the park extend north into the city limits. The portion of the stream and wetland buffers extending into City of Renton jurisdiction (Figure 2) consists mostly of gravel -surfaced access road and the existing fenced and graveled pump station area. Limited vegetation consisting largely of shrubs and red alder saplings is present around two detention ponds north of the access road and pump station. 6.3.2 King County King County regulates critical areas under King County Code (KCC) Chapter 21 A.24. 6.3.2.1 Wetlands King County classifies wetlands using the Washington State Wetland Rating System for Western Washington (KCC 21 A.24.318). Using this system, ESA rated the wetlands in the study area as Category 11 (wetland rating form is provided in Appendix Q. The wetlands received scores of 22 for water quality improvement, 16 for hydrology, and 22 for habitat, for a total of 60 points. For Category 11 wetlands inside the urban growth area (such as those on the East Renton Lift Station site), the base buffer width is 125 feet, with 7.5 feet added for each habitat score above 20 points. The buffer width for the onsite wetlands is therefore 140 feet as shown on Figure 5 (KCC 21 A.24.325.A.1). King County requires applicants to avoid and minimize wetland impacts. When permanent impacts to a wetland or wetland buffer are unavoidable, mitigation is required. Mitigation ratios are 3:1 for wetland creation; or 1:1 for wetland creation plus 4:1 enhancement. Ratios for wetland rehabilitation and enhancement only are higher (8:1 and 12.1, respectively) (KCC 21 A.24.340). 6.3.2.2 Streams King County regulates streams as "aquatic areas" (KCC 21A.24.355). Using the County's classification, Stewart Creek and the unnamed stream on the site meet the criteria for a Type N strearn because they are not a shoreline of the state, do not contain fish or fish habitat, but are connected to Type S or F waters (the Cedar River) by a channel system that is at least partially above -ground. The buffer requirement for Type N streams within the urban growth area is 65 feet (KCC 21 A.24.358) (Figure 5). Construction of a new utility corridor in an aquatic area or buffer is allowed, subject to several conditions that are detailed in KCC 21 A.24.045(D)(34). In general these include: I 1 1 ]rage 14 ESA MY 2011 I East Renton Lift Station - Wetland, Stream and VVilrllit Surd~ * Applicants must show that there is no alternative location with less adverse impact on the critical area and critical area buffer. * Utility routes that parallel the channel or follow a down -valley route near the channel should be avoided. * The width of the corridor should be minimized, as should the removal of trees greater than 12 inches diameter at breast height (dbh). * An additional, contiguous and undisturbed critical area buffer, equal in area to the disturbed critical area buffer area including any allowed maintenance roads, must be provided to protect the critical area. * To the maximum extent practical, access for maintenance should occur limited access points into the critical area buffer rather than by a parallel maintenance road. * The utility corridor or facility may not adversely impact the overall critical area hydrology or diminish flood storage capacity. * Construction should occur during approved periods for instream work. Open trenching is only allowed during low flow periods or only within aquatic areas when they are dry. * The County may approve open trenching of Type F aquatic areas only if there is not a feasible alternative and equivalent or greater environmental protection can be achieved. * Construction techniques should be used to minimize disturbance to critical areas. Bored, drilled or other trenchless crossing must be laterally constructed at least four feet below the maximum depth of scour for the base flood. King County requires applicants to avoid and minimize aquatic area impacts. When impacts to a stream or stream buffer are unavoidable, mitigation is required. Mitigation requirements for unavoidable impacts to aquatic areas and their buffers are provided in KCC 21 A.24.380. 6.3.2.3 Wildlife The study area does not contain documented habitat for species covered under the County's wildlife habitat conservation areas standards (KCC 21 A.24.382). The site does not contain a mapped wildlife habitat network (King County iMap, 2009). 6.3.2.4 Trees King County's grading code (KCC 16.82) regulates clearing and removal of vegetation, excavation, grading. and earthwork. A permit is required for clearing or grading within wetlands, aquatic areas, and their buffers. Utility developments are exempt from significant tree retention requirements (KCC 16.82.156). ESA page 15 Ic.dY 2011 East Renton Lift Station - WeNa+id. Streant and Wildlife 7.0 LIMITATIONS Within the limitations of schedule, budget, scope -of -work, and seasonal constraints, we warrant that this study was conducted in accordance with generally accepted environmental science practices, including the technical guidelines and criteria in effect at the time this study was performed, as outlined in the Methods section. The results and conclusions of this report represent the authors' best professional judgment, based upon information provided by the project proponent in addition to that obtained during the course of this study. No other warranty, expressed or implied, is made. 8.0 REFERENCES Brinson, M. August 1993. A Hydrogeomorphic Classification for Wetlands. U.S. Army Corps of Engineers, Wetlands Research Program. Corps (U.S. Army Corps of Engineers). 2008. Interim Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Western Mountains, Valleys, and Coast Region Wetlands Regulatory Assistance Program. April 2008. ERDC/EL TR-08-13. Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of Wetlands and Deepwater Habitats of'the United States. FWS/OBS-79/31. U.S. Fish and Wildlife Service. Ecology (Washington State Department of Ecology). 1991. Shoreline Management handbook: First Edition. Publication No. 90-45. Olympia, Washington. Ecology (Washington State Department of Ecology). 1992. The Grokvth Management Act and the State Environmental Policy Act: A Guide to Interrelationships. Publication No. 92- 07. Olympia, Washington. Ecology (Washington State Department of Ecology). 1997. Washington. State Wetlands Identification and Delineation Manual. Publication No. 96-94. Olympia, Washington Environmental Laboratory. 1987. Corps of Engineers Wetlands Delineation Manual. Technical Report Y-87-1. U.S. Army Engineer Waterways Experiment Station, Vicksburg, Massachusetts. EPA (Environmental Protection Agency) and Corps (U.S. Army Corps of Engineers). June 5, 2007. Clean Water Act Jurisdiction Following the US Supreme Court's Decision in Rapanos v. United States & Carabell v. United States. Federal Register. 1982. Title 33: Navigation and Navigable Waters; Chapter If, Regulatory Programs of the Corps of'Engineers. Vol. 47, No. 138, p. 31810. U.S. Government Printing Office, Washington, DC. I I I 0 I 1 page 16 ESA July 2011 ' I East Renton Lift Station - Wetland, Sli-e m1 and Wildlifr Said}' Federal Register. 1986. 33 CFR Parts 320 through 3 30: Regulatory Programs of the Corps of Engineers; Final Rule. Vol. 51, No. 219, pp.41206-41260. U.S. Government Printing Office, Washington, DC. Federal Register. 1988. 40 CFR Part 230. Giridelrries,for Specifi:catiorr of Disposal Sites for Dredged or Fill Material. Vol. 45, No. 249, Pages 85336-85357. U.S. Government Printing Office, Washington, DC. Federal Register. 1994. Changes in Hydric Soils of the United States. July 13. Washington, DC. Hitchcock, C.L., and A. Cronquist. 1973. Flora of the Pacific Nortlnvest: All Illustrated Manual. University of Washington Press, Seattle, Washington. Hruby, T. 2004. Washington State Wetland Rating Systerrr f n- Western Washington — Revised. August 2004. Ecology publication number 04-06-025. Olympia, WA. I King County ]Map. 2009. King County iMap interactive mapping tool. Available: http://www.kinacount .2ov/operations/ isg •/Maps/iMAP.aspx. Munsell Color. 2000. Mansell Soil Color Charts. GretagMacbeth, New Windsor, New York. NRCS (Natural Resources Conservation Service). 1995. Hydric Soils List for Washington. Revised December 15, 1995. NRCS (Natural Resources Conservation Service). 1998. Field Indicators of Hydric Sails in the United States, Version 4.0. G.W. Hurt, P.M. Whited, and R.F. Pringle (eds.), United States Department of Agriculture, Ft. Worth, Texas. NRCS (Natural Resources Conservation Service). 2009. Hydric Soils, King County Area, Washington. Available: http://soildatamar-t.nres.usda.szov. Accessed June 2009, Snyder, D.E., P.S. Gale, and R.F. Pringle. 1973. Soil Survey of Ding County Area, Washington. U.S. Soil Conservation Service, Washington, DC. USFWS (U.S. Fish and Wildlife Service). 1988. National List of Plant Species that Occur in Wetlands: Northak-est (Region 9). Biol. Rpt. 88(26.9). United States Department of Interior, Washington, DC. jUSFWS (U.S. Fish and Wildlife Service). 1993. 1993 Supplement to List of'Plant Species that Occur in Wetlands: Northwest (Region 9). USFWS (U.S. Fish and Wildlife Service). 2007. National Wetland Inventory GIS mapping. Vepraskas, M.J. 1999. Redoximorphic Features for" Identifying Ayuic Conditions. Technical fBulletin 301. North Carolina Agricultural Research Service, North Carolina State University, Raleigh, North Carolina. ESA page17 Jul), 2011 East Renton I.if1 Station - Wettand. Stream and Wildlife Stud), WDFW (Washington Department of Fish and Wildlife). 2008. Priority Habitats and Species GIS database. WDFW (Washington Department of Fish and Wildlife), 2009. SalmonScape online mapping. Available: httl:Hwdfw.wa..ov/mitppin /salmonscal2 . WDNR (Washington Department of Natural Resources). 2008. Natural Heritage GIS database. page 78 ESA JOY 2011 East Renton Lift Stertinx - Wetland, Stream and tVildlife Stadv FIGURES AND PHOTOGRAPHS 1 n I I ESA page 19 July' 2011 J T� .0 405 Unincorporated Ar 1 x KIng Coun ty Ilr SE 72 St , 81h Ali. for a Ap ale. AL SE 136TH ST FzE-IMTHST --L, 130�H PL zt, Jh- S& 139TR L Wr. ONOebrporl3ted King County X ,A---[4 A4 A XM . 4h, A-K U—ninc:-orporatdd King County I&, Logend ORojen Area NRCS Soils Ma, Mked alluvial land ---'- Roads Symbol, Name Ng, Newberg silt loam Age, Atderwood gravely sandy loam, 0 1o6 percent sbpes Parks No. Norma sandy loam Hydrk Status AgC, Nderwood gravelly sandy loam, 6 to 1S percent slopes INC, Oval gmvely loam, Oto 15 percent slopes Agn, Nderwood gravelly sandy loam, 15 to 30 percent sbpes i'ITS, Pits AkF, Alderwood and Kirsap soih, very steep R, Pilchuck loamytine sand Arab, Arents, Alderwood material, 0to 6 percent slopes IV, Puyallup Rne sandy Gam A.C. Arens, Alderwood materia{ 6io is pereem slopes RdC, Ragnar-IndkanOla association, sloping An, Arenis, Everett material Rh. Aire rwas h Bh. Bellingham sit loam Sk, Seattle muck Eve, Everett gravely sandy loam, o to S percent slopes Sm, Shalrar muck EVC, Eve rest gravelly sandy loam, 5 to 15 percent slopes Tu, Tukwila muck KOS. Kitsap silt loam, 2 to a par. nt slopes Ur, Urban land W, Water SOURCE'. N RCS, 2003; King County, 2009 ` Eas. Renton Lift Station.209036 Figure 2 NRCS Soils King County, Washington 'uollewicP s141 +Sloan pla!) oa aie siasn 'sasodmd uoyarvLsuaa jolpue'u6isep'6uiuueld Ja) pasn s! uo!ILLujoju! s!gl uaµM 'suo!ss!wo Jo sJoJJa Joy alq!suodsai lou s! uoluaS to Al!o aql 'Aluo eouep!nb IeJaueb Jul pasn oq pinogs pue aw!1 s!gp 7e algeliene uo!SewJolu! Fsaq eq! s! 11 -sawnas snoiawnu wwl pal!dwoo sem yl 'Aluo a!lewagas s! uolLeuuolu! AJOJUOAU! slµl :Jaw!vpsq u0j6uiysem `uo}ua8 /UoIuanuI Jassy 41!1!;f1 aaIPM anejjnS g amBij 9W6M ' uolle;S W] uoluad lse�3 . MSL=A V`£s 17/6 MS 39Ob NEZ 1176 jaaz] 009 00C os6 0 60OZ Ae W AJOIUanu E JeSSV I iwin aajeM aoejjnS L LQZ 'VS3 '600Z 'uoluaa ;o 40 :3adnOS aleMs01s �rr7r� uolleJllgul : Z adA-L a Jnoluoo 110L 10JIu00 MOi j L adAl 11 aaed$ uad0i)Ved Mol3 LOOM uolaoag Japeno µ IU . Z adA_L A vv,i lauuel 0 L adAj ■ spwr-L uolua6 304to 1QIul ■ snoaue1183s1w uenlno t4unoo 6uiN Huel Q adld ._ -- PEA ■ Pu4d 8 ioasM Z adf,l • f4unoo Bup{ LJanlno L adA.L ■ IMIA lalul • duel f4unoa BuiM (xl;aad ,d,) aIeAEJd Puod IJanlno _ uolWlg dwnd EE (xi;aJa ,d.) a;enud adld - Llnell E3 aInPA ® aleAlad Z edAl duel Q lJenlno L adAj ■ puod adld Lalul a uoluatj uoluaH UOJUGN. l�ijiae j 1044UOD MOI j aUUEAanuOO sampnijS 1 1 0 East Renton Lift Station. 209036 SOURCE: King County, 2009 (2005); USFWS, 2007 (NWI) Figure 4 NWI and King County Wetland Mapping King County, Washington VM 'AlurOO 5UN IJed poonn81deW sjajjn8 pue `spuejlaAA`sweajjS 5 ainGij 9t06OZ "uopejs 4!-1 uoIuaa Ise3 (SODZ) 6o0Z'Alunoo 6uN "Oul'sieawBu3 30VJ''600Z'uosjlopy vs3 :3ounos m= m m m m m i m m m m m r m r m i m 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 East Renton Lift Station - Wetland, Stream and Wildlife Study Wetland A Looking west within Wetland A, April 2009. Surface water flowing downslope through Wetland A, May 2009. Concrete structure (at left) where water drains from Wetland A into stream. ESA July 2011 � 1 1. {r 1 Al R y' S +� •fir, - '� y � ~•ti vie j. �■rt w ±y ���t ' 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Welland D �p Y Depression within Wetland D, May 2009. Wetland E Ponded area in central part of Wetland E, May 2009. East Renton Lift Station - Wetland, Stream and Wildlife Sludy Seepage into north end of Wetland D following rainstorm, May 2009. Northwestern portion of Wetland E, May 2009. ESA July 2011 Wetland F Foot trail running through western part of Wetland F, May 2009. Wetland G East Renton Lift Station - Wetland, Stream and Wildlje Study Looking into Wetland F, May 2009. Looking east along foot trail; surface water flowing from Wetland G (at Left) into Wetland F (at right), May 2009. ESA July 2011 1 1 1 1 1 East Renton Lift Station - Welland, Stream and Wildlife Study Streams Upper portion of main strearn channel (north end of Central portion of main stream channel, May 2009. study area), April 2009. Main stream channel as it enters Wetland E, May 2009. Tributary drainage looking downslope, May 2009 Southern end of main stream channel entering culvert, May 2009. Lower part of tributary drainage, within Wetland G, May 2009. ESA July 2011 Last Renton Lift Station - Wetland, Stream and Disturbed upland area south of DP 2, May 2009. Typical upland forest, June 2009. Detention Ponds I Western detention pond, April 2009. Eastern detention pond, April 2009. ESA July 2011 East Renlon Lift Station - Welland, Stream carrel 147ildlifi, Sluill. 1_1, :2 =1 ►1111.lv-T METHODS USED TO EVALUATE WETLAND CHARACTERISTICS 1 I ESA Appendix A JWY 2011 East Renton Lift Station - Wetland, Stream and Wildlife Surds Wetland Definition Wetlands are formally defined by the U.S. Army Corps of Engineers (Corps) (Federal Register 1982), the Environmental Protection Agency (EPA) (Federal Register 1988), the Washington ' Shoreline Management Act (SMA) of 1971 (Ecology, 1991) and the Washington State Growth Management Act (GMA) (Ecology, 1992) as ... those areas that are inundated oi- saturated h)> surface or grown& ater at a fi-eguenc..y and duration .sufficient to support, and that under normal circumstances do support, a prevalence of iegetation typically adapted for life in saturated soil conditions. Wetlands generally include .swamps, marshes, hogs, and similar areas (Federal Register, 1982, 1986). ' In addition, the SMA and the GMA definitions add: Wetlands do not include those artificial wetlands intentionally created_from non - wetland site, including, but not limited to, irrigation and drainage ditches, grass - lined swales, canals, detention facilities, wastewater treatnaerit facilities, farm ponds, and landscape amenities, or those wetlands created after July 1, 1990 that were unintentionally created as a result of the construction of a road, street, or highway. Wetlands maY include those artificiallh created wetlands intentionally created from non -wetland areas to mitigate the conversion of ' wetlands. Methods defined in the Washington State Wetlands Identification and Delineation Manual ' (Ecology, 1997) were used to determine the presence and extent of wetlands on the subject property. Washington State and all local governments must use the state delineation manual to implement the Shoreline Management Act and/or the local regulations adopted pursuant to the Growth Management Act. The Washington state manual is consistent with the U.S. Ariz - Corps of Engineers Wetlands Delineation Manual (Environmental Laboratory, 1987), The Corps has been working with states, federal agencies, and others to develop supplemental regional criteria to refine the 1987 delineation manual. Two regions fall within the state of Washington: The Arid West (dry lands ' west of the Continental Divide, from Idaho and eastern Washington south to the U.S. - Mexico border) and the Western Mountains, Valleys, and Coast. Interim Regional Supplements to the Corps of Engineers 1987 Wetlands Delineation Manual have been completed by the Corps for both regions in Washington, and the appropriate supplement is now used, along with the Washington State Delineation Manual, when conducting delineations in those regions. ' The methodology outlined in the manuals is based upon three essential characteristics of wetlands: (1) hydrophytic vegetation; (2) hydric soils; and (3) wetland hydrology. Field indicators of these three characteristics must all be present in order to determine that an area is a ' wetland (unless problem areas or atypical situations are encountered). These characteristics are discussed below. ' ESA PuheA-1 AdY 2011 East Renton Lift Station - Wetland, Stream and Wildlife Stud. t Vegetation Plants must be specially adapted for life under saturated or anaerobic conditions to grow in wetlands. The U.S. Fish and Wildlife Service (USFWS) has determined the estimated probability of each plant species' occurrence in wetlands and has accordingly assigned a ' "wetland indicator status" (WIS) to each species (USFWS, 1988, 1993). Plants are categorized as obligate (OBL), facultative wetland (FACW), facultative (FAC), facultative upland (FACU), upland (UPL), not listed (NL), or no indicator status (NI). Definitions for each indicator status , are listed in the Glossary. Species with an indicator status of OBL, FACW, or FAC are considered adapted for life in saturated or anaerobic soil conditions. Such species are referred to as "hydrophytic" vegetation. A (+) or (-) sign following the WIS signifies greater or lesser ' likelihood, respectively, of the species being found in wetland conditions. Areas of relatively homogeneous vegetative composition can be characterized by "dominant" ' species. The indicator status of the dominant species within each vegetative stratum is used to determine if the plant community may be characterized as hydrophytic. The vegetation of an area is considered to be hydrophytic if more than 50% of the dominant species have an indicator ' status of OBL, FACW, or FAC. The Regional Supplements provide additional tests for evaluating the presence of hydrophytic vegetation communities including the prevalence index, morphological adaptations, and wetland non -vascular plants. The Supplements also address ' difficult situations where hydrophytic vegetation indicators are not present but hydric soils and wetland hydrology are observed. Soils ' Hydric soils are indicative of wetlands. Hydric soils are defined as soils that are saturated, , flooded, or ponded long enough during the growing season to develop anaerobic conditions in the upper part of the soil profile (Federal Register, 1994). The Natural Resources Conservation Service (NRCS), in cooperation with the National Technical Committee for Hydric Soils, has compiled lists of hydric soils (NRCS, 1995). These lists identify soil series mapped by the NRCS that meet hydric soil criteria. It is common, however, for a map unit of non -wetland (non- hydric) soil to have inclusions of hydric soil, and vice versa. Therefore, field examination of soil I conditions is important to determine if hydric soil conditions exist. The NRCS has developed a guide for identifying field indicators of hydric soils (NRCS, 1998). ' This list of hydric soil indicators is considered to be dynamic; revisions are anticipated to occur on a regular basis as a result of ongoing studies of hydric soils. In general, anaerobic conditions create certain characteristics in hydric soils, collectively known as "redoximorphic features," that can be observed in the field (Vepraskas, 1999). Redoximorphic features include high organic content, accumulation of sulfidic material (rotten egg odor), greenish- or bluish -gray color (gley formation), spots or blotches of different color interspersed with the dominant or matrix color ' (mottling), and dark soil colors (low soil chroma) (NRCS, 1998; Vepraskas, 1999). Soil colors are described both by common color name (for example, "dark brown") and by a numerical description of their hue, value, and chroma (for example, IOYR 2/2) as identified on a Munsell ' soil color chart (Munsell Color, 2000). Soil color is determined from a moist soil sample. The Regional Supplements provide methods for difficult situations where hydric soil indicators are not observed, but indicators of hydrophytic vegetation and wetland hydrology are present. Page A-2 ESA JOY 2011 1 East Renton Lift Station - Wrliewd, Streoln raid Wildlife Stwh Hydrology ' Water must be present in order for wetlands to exist; however, it need not be present throughout the entire year. Wetland hydrology is considered to be present when there is permanent or ' periodic inundation or soil saturation at or near the soil surface for more than 12.5% of the growing season (typically two weeks in lowland Pacific Northwest areas). Areas that are inundated or saturated for between 5% and 12.5% of the growing season in most years may or ' may not be wetlands. Areas inundated or saturated for less than 5% of the growing season are non -wetlands (Ecology, 1997). ' Indicators of wetland hydrology include observation of ponding or soil saturation, water marks, drift lines, drainage patterns, sediment deposits, oxidized rhizospheres, water -stained leaves, and local soil survey data. Where positive indicators of wetland hydrology are observed, it is ' assumed that wetland hydrology occurs for a sufficient period of the growing season to meet the wetland criteria, as described by Ecology (1997). The Regional Supplements provide methods for evaluating situations in wetlands that periodically lack indicators of wetland hydrology but where hydric soils and hydrophytic vegetation are present. J ESA Page A-3 Jule 2011 1 Fast Renton L, ft Station - Wetland, Stream and Wildlife Stud-y APPENDIX B: ' COMMON AND SCIENTIFIC NAMES OF PLANTS AND THEIR WETLAND INDICATOR STATUS 1 1 1 I ESA Appendix B Julr 2011 1 1 1 1 1 1 East Renton Lift Station - Wedand, Stream and PLANT SPECIES LIST FOR THE EAST RENTON LIFT STATION PROTECT, IDENTIFIED IN APRIL AND MAY 2009 COMMON NAME SCIENTIFIC NAME WETLAND INDICATOR STATUS` Trees black cottonwood Populus trichocarpa (Populus balsamifera ssp. trlchocarpa) FAC Douglas fir Pseudotsuga menziesii FACU* European mountain —ash (Rowan tree) Sorbu.s aucuparia NL red alder Al►2us rubra FAC Western hemlock Tsuga heterophylla FACU- Western red cedar Thuja plicata FAC Shrubs Baldhip rose Rosa gymnocar pa FACU beaked hazelnut Corylus cornuta FACU black twin -berry Lonicera involucrata FAC+* Cascara Rhamnus purshiana (Frangula purshiana) FAC- common snowberry Symphoricarpos albus FACU creambush oceanspray Holodiscus discolor NL Douglas' spiraea Spiraea dougla.sii FACW English holly Ilex ayuifolium NL evergreen blackberry Rubus laciniatus FACU+ Himalayan blackberry Rubus discolor (Rubus armenicus) FACU Indian plum (osoberry) Oemleria cerasiformis FACU Pacific ninebark Physocarpus capitatus FACW- red elderberry Sambuc.•tis racemosa FACU red huckleberry (red bilberry) Vaccinium parvifoliwn NL red -osier dogwood (western red osier) Cornus stolortifera (Cornus sericea) FACW Sala] Gaultheria shallop FACU* salmonberry Rubus spectabilis FAC+ Scouler willow Salix scouleriana FAC Sitka willow Salix sitchensis FACW ESA Page B-1 did), 2011 East Renton Lift Station - Wettand, Stream and Wildlaf , StudY COMMON NAME SCIENTIFIC NAME WETLAND INDICATOR STATUS` thimbleberry Ruhus parviJlorus FAC- vine maple Auer circinatum FAC- Herbs ! Bracken fern Pteridium aquilinum FACU Cooley's hedge -nettle Stachys coolevae FACW creeping buttercup Ranunculus 1-epens FACW Enchanter's nightshade Cireaea alpina fireweed Epilobium angustifoliurn FACU+ fringe cup Telli.um grandiflora herb Robert Geranium rohertanium NL lady fern Athyrium filix femina FAC large -leaf avens Geum rnacrophy>llum FACW-'` orange honey suckle Lonicera ciliosa Pacific blackberry (dewberry) Rubus ursinus FACU Pacific bleedingheart Dicentr a forrnosa FACU` pig -a -back -plant Tohniea rnenziesii FAC' slough Sedge Carex obnupta OBL sword fern Polystichum manhunt FACU tansy ragwort Senecio jacobaea western trillium Trillium ovaturn FACU* yellow archangel Lamaistrurn galeobdolon 1 1 1 1 *Key to Wetland Indicator Status codes — Northwest Region (Source: USFWS, 1988,.1993): OBL Obligate: species that almost always occur wetlands under natural conditions (est. ' probability >99%). FACW Facultative wetland : species that usually occur in wetlands (est. probability 67 to 99%), but are occasionally found in non -wetlands. FAC Facultative: Species that are equally likely to occur in wetlands or non -wetlands (est. probability 34 to 66%). FACU Facultative upland: species that usually occur in non -wetlands (est. probability 67 to 99%), but are occasionally found in wetlands. UPL Upland: species that almost always occur in non -wetlands under normal conditions (est. probability >99%). NIL Not listed: species that are not listed by USFWS (1988, 1993) and are presumed to be upland species. NI No indicator: species for which insufficient information is available to determine status, or which were not evaluated by USFWS. Page B-2 ESA Jule 2017 1 1 i 1 1 1 1 1 1 1 1 1 1 1 East Rewon Lift Station - Wetland, Stream and Wildlife Snap + indicates a species that is more frequently found in wetlands - indicates a species that is less frequently found in wetlands identifies a tentative assignment based upon either limited information or coni-licting reviews ESA Jule 2011 Page B-3 Lust Renton Lif? Station - YVetiartd, Srreum and Wildlife StirtlY APPENDIX C: WASHINGTON STATE WETLAND RATING I SYSTEM AND RATING FORMS u 1 u 1 1 ' ESA Appendix C Jrrls 2011 1 1 1 1 Fa.y Rerr on Lift Station - Weiland, Strmna and Itildfrfr Sttrdv Washington State Wetland Rating System The observed wetlands were rated using the Washington State Department of Ecology's Wetland Rating System for- Western Washington (Hruby, 2004). This system was developed by Ecology to differentiate wetlands based on their sensitivity to disturbance, their significance, their rarity, our ability to replace them, and the beneficial functions they provide to society. Wetlands are categorized using the Ecology rating system according to the following criteria: Category I wetlands represent a unique or rare wetland type, or are more sensitive to disturbance; or are relatively undisturbed and contain ecological attributes that are impossible to replace within a human lifetime. Category II wetlands are difficult, though not impossible, to replace, and provide high levels of rsome functions. Category III wetlands have a moderate level of function. They have been disturbed in some ways, and are often less diverse or more isolated from other natural resources in the landscape than Category II wetlands. iCategory IV wetlands have the lowest levels of functions and are often heavily disturbed. 1 1 1 ' ESA Page C-I JWY 2011 Wet[and name or number WETLAND RATING FORM-- WESTERN WASHINGTON Version 2 - Updated July 2006 to increase accuracy and reproducibility among users Updated Oct 2009 with the new WDFW definitions for priority habitats Name of wetland (if known): dZA_ ��WWP7 Date of site visit: mot— a Rated by_ _�& , 1J CkCk 0-A T Trained by Ecology? YesXNo Date of training go SEC: TWNSHP: RNGE: Is SIT/R in Appendi D? Yes_ No A Map of wetland unit: Figure Estimated size C SUMMARY OF RATING Category based on FUNCTIONS provided by wetland I Hx III IV Category i =Score >=70 Score for Water Quality Functions Category 11 = Score 5I -69 Score for Hydrologic Functions ' Category III = Score 30-50 Score for Habitat Functions Category iV = Score < 30 TOTAL score for Functions 1 Category based on SPECIAL CHARACTERISTICS of wetland 1 1 1 I 1 I H Does not Apply X( Final Category (choose the "highest" category from above) Summary of basic information about the wetland unit <.V4'etland Unit hits S�ec�ai ;Charactertsttcs' Wetland AGM Class used for. Rattn ; Estuarine De ressional ►/ Natural Herita a Wetland Riverine ✓ Bog Lake -fringe Mature Forest Sloe J/ Old Growth Forest Flats Coastal Lagoon Freshwater Tidal Interdunal None of the above I V Check if unit has multiple HGM classes present Wetland Rating Fnrm -- western Washington 1 version 2 To be used with Ecology Publication 04-06-025 August 2004 Wetland name or number rz L- Does the wetland unit being rated meet any of the criteria below? If you answer YES to any of the questions below you will need to protect the wetland according to the regulations regarding the special characteristics found in the wetland. beck >Ist for Wk1a'fids ,That May Deed Add><fional Protecttan' YES NU s {m' addatIon a© the rotechon recommended for, >!ts date a SP 1. Has the wetland unit beef documented as a habilat for any Federally listed Threatened or Endangered animal or plant species (TIE species)? For the purposes of this rating system, "documented" means the wetland is on the X appropriate state or federal database. SP2. Has the wetland trl7it been documented as habitat far a7731 Stale listed Threatened or Endangered anijnal species? For the purposes of this rating system, "documented" means the wetland is on the appropriate state database. Note. Wetlands with State listed plant species are categorized as Cate or 1 Natural Heritage Wetlands see p, 19 of data form). SP3. Does the wetland unit contain h7dlvlduols of Priorily species listed by the WD IT"for the state? SP4. Does the wetland lMil have a local significance in addition to Its fnnctions? For example, the wetland has been identified in the Shoreline Master Program, the Critical Areas Ordinance, or in a local management plan as having special significance. To complete the next parl of the data sheet you will need to deterinine the H'd�rogeomoryhic Class of the wetland heir rated_. The hydrogeomorphic classification groups wetlands into those that function in similar ways. This simplifies the questions needed to answer how well the wetland functions. The Hydrogeomorphic Class of a wetland can be determined using the key below. See p. 24 for more detailed instructions on classifying wetlands. Wetland Ratio Form — western Washington 2 August 2 g g044 version 2 Updated with new WDFW definitions Oct. 2008 1 1 1 I 1 1 1 Wetland name or number t 1 Classification of Wetland Units in Western Washington If the hydrologic cr�t wta Lsted to each quest'on da not apply to the enfire untf bung' rated, you H probably Have a ,unit wrth mult><p1e:GM classes In this case, �denttfy which ;hydroltigie er�teria to questions 1 :7 apply, and go,to Questun $ I. Are the —water levels in the entire unit usually controlled by tides (i.e. except during floods)? �O —go-to ?---� YES the wetland class is Tidal Fringe If yes, is the salinity of the water during periods of annual low flow below 0.5 ppt (parts per thousand)? YES — Freshwater Tidal Fringe NO — Saltwater Tidal Fringe (Estuarine) ' If your wetland can be classified as a Fr•eshivater Tidal Fringe use the forms far Riverine wetlands. If it is Salwwter Tidal Fringe it is rated as an Estuarine wetland Wetlands that were called estuarine in the first and second editions of the rating system are called Salt Water Tidal Fringe in the Hydrogeomorphic Classification. Estuarine wetlands were categorized separately in the earlier editions, and this separation is being kept in this revision. To maintain consistency between editions, the term "Estuarine" wetland is kept. Please note, however, that the characteristics that define Category I and II estuarine wetlands have changed (see p. ). 2. The entire wetland unit is flat and precipitation is the only source (390%) of water to it. oundvwater)and surface water runoff are NOT sources of water to the unit. O — go to • YES — The wetland class is Flats If your wetland can be classified as a "Flats" wetland, use the form for Depressional wetlands. 3. Does the entire wetland unit meet both of the following criteria? Tile vegetated part of the wetland is on the shores of a body of permanent open water (without any vegetation on the surface) at least 20 acres (8 ha) in size; �At~Ieast 34°l6 of the open water area is deeper than 6.6 ft (2 in)? NO — go` to YES —The wetland class is Lake -fringe (Lacustrine Fringe) 4. Does the entire wetland unit meet all of the following criteria? VThe wetland is on a slope (slope can be very gradual), I /The water flows through the wetland in one direction (unidirectional) and usually comes from seeps. It may flow subsurface, as sheetflow, or in a swale without distinct banks. VThe water leaves the wetland without being impounded? NOTE: Surface ivater does irat por7d in these l}pe of wetlands except occasionally in very srrrall and shallow depressions ar behind hummocks (depressions are usually <3f di aayx aird less than I foot deep). NO - go to 5 YES —The wetland class is Slope n Wetland Rating Fortn— western Washington 3 August 2004 version 2 Updated with new WDFW definitions Oct. 2008 C r' Wetland name or number A� 5 5. Does the entire wetland unit meet all of the following The unit is in a valley, or stream channel, / flooding from that stream or river V The overbank flooding occurs at lea onct NOTE: The riverine wit can contain a ession notflooding.- _.._.. NO - go to b 'YES —The wetland class is Riverin h e 1 gets inundated by overbank 1 two years. are filled with water when the river is 6. is the entire wetland unit in a topographic depressionfin which water ponds, or is saturated to the surface, at some time during the year. This mean rat any outlet, rf present, is higher than the interior of the wetlarrrl.- ..- ._.,....... _ .:....__ NO — go to 7 jr YES -- The wetland class is Depressional 7. Is the entire wetland 'unif located in a very --flat with no obvious depression and no overbank flooding. The unit does not pond surface water more than a few inches. The unit seems to be maintained by high groundwater in the area. The wetland may be ditched, but has no obvious natural outlet. NO — go to 8 YES — The wetland class is Depressional 8. Your wetland unit seems to be difficult to classify and probably contains several different HGM clases. For example, seeps at the base of a slope may grade into a riverine Iloodplain, or a small stream within a depressional wetland has a zone of flooding along its sides. GO BACK AND IDENTIFY WHICH OF THE HYDROLOGIC REGIMES DESCRIBED IN QUESTIONS 1-7 APPLY TO DIFFERENT AREAS 1N THE UNIT (make a rough sketch to help you decide). Use the following table to identify the appropriate class to use for the rating system if you have several HGM classes present within your wetland. NOTE: Use this table only if the class that is recommended in the second column represents 10% or more of the total area of the wetland unit being rated. If the area of the class listed in column 2 is less than 10% of the unit; classify the wetland using the class that represents more than 90% of the total area. :I3GM,Classes,wrtlnz thetwetla€rd zrrTzt'berrr fated .: ;'.' . ; .•, fr HGCla�ss.to:''Use irz.',Rairr7 ., Slope + Riverine Riverine SIo e + Depressional Depressional Slope + Lake -fringe Lake -fringe Depressional + Riverine along stream within boundary Depressional Depressional + Lake -fringe Depressional Salt Water Tidal Fringe and any other class of freshwater wetland Treat as ESTUARINE under wetlands with special characteristics If you are unable still to determine which of the above criteria apply to your wetland or if Vou ave more than 2 HGM classes within a wetland boundary, classify the wetland a /Depressiona for the rating. Wetland Rating Form — western Washington 4 August 2004 version 2 Updated with new WDFW definitions Oct. 2008 1 1 1 1 'J 1 1 Wetland name or number i_57, I I 1 1 D . Depress>tonal apd I+')(ats We#lands ¢ ° ` = Paints ., WATER QUAIIITY tln FUNCTIONS Indicators thdt`"t}]� Wetland tt Cttnetians to_ ;(only 1 scam perbOX am rove water.",_ ualtty ...,, D 1. Does the wetland unit have the potential to improve water quality? (seep 38) D 1.1 Characteristics of surface water flows out of the wetland: Figure Unit is a depression with no surface water leaving it (no outlet) pyto n YUnit has an intermittently flowing, OR highly constricted permanently flowing outlet oints - 2 Unit has an unconstricted, or slightly constricted, surface outlet (permunend)rflowing) points = l 2— Unit is a "flat" depression (Q. 7 on key), or in the Flats class, with permanent surface outflow and no obvious nntural outlet and/or outlet is a man-made ditch points = 1 (lfditch is not permanentlyflowing treat unit as "intermittently flowing") 4%N•P-S P Ga tV t k1 Provide photo or drawin S 1.2 The soN 2 inches bUow the surface (or duff layer) is clay or organic (use NRCS definitions) D YES points = 4 NO points = 0 D 1.3 Characteristics of persistent vegetation (emergent, shrub, and/or forest Cowardin class) Figure Wetland has persistent, ungrazed, vegetation > = 95% of area points = 5 D XWetland has persistent, ungrazed, vegetation > = 1/2 of area points = 3 rS Wetland has persistent, ungrazed vegetation > = 1110 of area points = 1 Wetland has persistent, ungrazed vegetation <1/10 of area points = 0 Map of Cowardin vegetation classes D1.4 Characteristics of seasonal ponding or inundation. Figure This is the area of the wetland unit that is ondedfor at least? months, but dries out D sometime during the year. Do not count the area drat is pe7RaZentll, ponded. Estimate area as the average condition 5 out of 10 jrts. Area seasonally ponded is >'/z total area of wetland points = 4' {Area seasonally ponded is >'/a total area of wetland points = 2 Area seasonally ponded is <'/a total area of wetland points = 0 Map of H dra edods D Total for D 1 Acid the points in the boxes above I I D D 2. Does the wetland unit have the opportunity to improve water quality? (seep. 44) Answer YES if you know or believe there are pollutants in groundwater or surface water corning into the wetland that would otherwise reduce water quality in streams, lakes or groundwater downgradient from the wetland. Note which of the following conditions provide the sources ofpollutants. A unit tttaj1 have pollutants coming from several sources, but ally single source would qualify as opportunity. — Grazing in the wetland or within 150 ft Untreated stormwater discharges to wet]and — Tilled fields or orchards within 150 ft of wetland = A stream or culvert discharges into wetland that drains developed areas, residential areas, farmed fields, roads, or clear-cut logging — Residential, urban areas, golf courses are within 150 ft of wetland multiplier - Wetland is fed by groundwater high in phosphorus or nitrogen — Other YES multiplier is 2 NO multiplier is I D TOTAL_- Water Quality Functions Multiply the score from DI by D2 r� Add scare to table on . I CJ`� Wetland Rating Form - western Washington 5 August 2004 version 2 Updated with new WDFW definitions Oct. 2008 Wetland name or number '_� D D4 ipressional and Flats W. : i wltl'JdS Pb1Rt5 1-iYDROLOGIC:FUNCTIONB indtaators that the wetland unit functtons,ta {°Yspore` .reduce f1cmding and'stream de radatton D 3. Does the wetland unit have the potential to reduce flooding and erosion? (see p.4G) D 3.1 Characteristics of surface water flows out of the wetland unit Unit is a depression with no surface water leaving it (no outlet) points = 4 YOnit has an intermittently flowing, OR highly constricted permanently flowing outlet points = 2 2— Unit is a "flat" depression (Q. 7 on key), or in the Flats class, with permanent surface outflow and no obvious natural outlet and/or outlet is a man-made ditch points = I (if ditch is not permanentlyjiowing treat unit as "inlernlittenflyflawing ") Unit has an unconstricted, or slightly constricted, surface outlet { ernnanently.11owin } points = 0 D D 3.2 Depth of storage during wet periods Estimate the height ofponding above tlae bottom of the outlet. For units with no outlet rrreasa(re front the sin face of permanent water or deepest part (if dr3). Marks of ponding are 3 ft or more above the surface or bottom of outlet points = 7 The wetland is a "headwater" wetland" points = 5 Marks of ponding between 2 ft to < 3 i from surface or bottom of outlet points = 5 )Marks are at least 0.5 ft to < 2 ft from surface or bottom of outlet points = 3 Unit is flat (yes to Q. 2 or Q. 7 on key) but has small depressions on the surface that trap water points = 1 Marks of ponding less than 0.5 ft points = 0 D D 3.3 Contribution of wetland unit to storage in the watershed Estimate the ratio of the area of upstream basin contributing surface water to the wetland to the area of the ivetlarad emit itself The area of the basin is less than 10 times the area of unit points = 5 The area of the basin is 10 to 100 times the area of the unit points = 3 The area of the basin is more than 100 times the area of the unit points = 0 Entire unit is in the FLATS class points = 5 D Total for D 3 Add the points in the boxes above ! D D 4. Does the wetland unit have the opportunity to reduce flooding and erosion? (see p. 49) Answer YES if the unit is in a location in the watershed where the flood storage, or reduction in water velocity, it provides helps protect downstream property and aquatic resources from flooding or excessive and/or erosive flows. Answer NO if the water coming into the wetland is controlled by a structure such as flood gate, tide gate, flap valve, reservoir etc. OR you estimate that more than 90% of the water in the wetland is t from groundwater in areas where damaging groundwater flooding does not occur. Nate which of the following indicators of opportunio) apply. — Wetland is in a headwater of a river or stream that has flooding problems Wetland drains to a river or stream that has flooding problems — Wetland has no outlet and impounds surface runoff water that might otherwise flow into a river or stream that has flooding problems multiplier 74 Other v4VA �,J,, K A, — ADO L Wc�zo 4 r - + C� ti multiplier is 2 `-j NO multi liens 1 D _l5 TOTAL - Hydrologic Functions Multiply the scare from D 3 by D 4 Add score to table on p. 1 1 Wetland Rating Form — western Washington i August 2004 version 2 Updated with new WDFW definitions Oct. 21}08 I 1 1 1-1 1 1 1 I it 1 1 Wetland name or number o-U 5 P tqe questions apply #o wefltrnds of all AGM classes o>ints :: HABITAT``FCINCTIONS Vindicators that unit functions to provide tmportanthabitat `perbo cj H 1. Does the wetland unit have the potential to provide Habitat for many species? H 1.1 Vegetation structure (seep. 72) Figure^ Check the opes of vegetation classes present (as defined bar Cowardin)- Size threshold for each class is'J acre or more than 10% of the area if unit is smaller than 2.5 acres. Aquatic bed Emergent plants Scrub/shrub (areas where shrubs have >30% cover) _Forested (areas where trees have >30% cover) 1, f'tlre unit has a forested class check if - The forested class has 3 out of 5 strata (canopy, sub -canopy, shrubs, herbaceous, moss/ground-cover) that each cover 20% within the forested polygon Add the munber of vegetation structures that qualify. If you have: 4 structures or more points = 4 Map of Cowardin vegetation Glasses 3 structures points 2 structures Dints = I� 1 structure aints = 0 H 1.2. Hydroperiods (seep. 73) Figure_ Check the types of water regimes (hydroperiods) present mlithin the ivetland. The water regime has to cover more than 10°/n of the wetland or'/o acre to count. (see te_rt for descriptions of h),droperiods) Permanently flooded or inundated 4 or more types present points= 3, Seasonally flooded or inundated 3 types present�aints Occasionally flooded or inundated 2 types present point = 1 fl V Saturated only 1 type present points = 0 Permanently flowing stream or river in, or adjacent to, the wetland Seasonally flowing stream in, or adjacent to, the wetland Lake.frirrge wetland =2 Points Fresh ivater tidal wetland = 2 points Map of hydroperiods H 1.3. Richness of Plant Species (seep. 75) Count the number of plant species in the wet[and that cover at least 10 ftn. (different patches of the same species can be comb fined to meet the sire threshold) l'ou do not have to name the species. Do not include Eurasian tllilfoil, reed canarygrass, purple loosestrife, Canadian Thistle If you counted: > 19 species points = 2 List species below if j)ou want to: )( 5 - 19 species points = 1 < 5 species points = 0 Wetland Rating Form — western Washington 13 version 2 Updated with new WDFW definitions Oct. 2008 Total for page August 2004 1 Wetland name or number " V�� H 1.4. Interspersion of habitats (seep. 76) Figure Decide from the diagrams below whether interspersion between Cowardin vegetation classes (described in H 1.1), or the classes and unvegetated areas (can include open water or mudflats) is high, medium, low, or none. None = 0 points Low =1 point Moderate = 2 points en: 1 i [riparian braided channels] High = 3 points NOTE: If you have four or more classes or three vegetation classes and open water the rating is always "high". Use map of Cowardin vegetation classes H 1.5. Special Habitat Features: (seep. 77) Check the habitat featzrr-es that are present irz the ri,etlarzd. The number of checks is the number ofpoints},ou put into the next column, Large, downed, woody debris within the wetland (>4in. diameter and 6 ft long). �C Standing snags (diameter at the bottom > 4 inches) in the wetland Undercut banks are present for at least 6.6 ft (2m) and/or overhanging vegetation extends at least 3.3 ft (1 m) over a stream (or ditch) in, or contiguous with the unit, for at least 33 ft (I Om) Stable steep banks of fine material that might be used by beaver or muskrat for denning (>34degree slope) OR signs of recent beaver activity are present (cart shrubs or trees that have Trot }Jet turned grey/brown) At least'/4 acre of thin -stemmed persistent vegetation or woody branches are present in areas that are permanently or seasonally inundated. (str uct:rres for egg-la)ing bjf amphibians) Invasive plants cover less than 25% of the wetland area in each stratum of plants NOTE, The 20% stated in earl}, printings of the manual on page 78 is all error. H 1. TOTAL Score - potential for providing habitat I Add the scores from HI.1, HI.2, H1.3, H1.4, H1.5 I Comments 1 1 n fl 1 Wetland Rating Form — western Washington 14 August 2004 version 2 Updated with new WDFW definitions Out. 2008 1 FJ 1 Wetland name or number ii L` ' H 2. Does the wetland unit have the opportunity to provide habitat for many species? H 2.1 Buffers (see p. 80) Figure Choose the description that best represents condition of buffer of Welland unit. The highest scoring criterion that applies to the ivetland is to be used in the rating. See teat far definition of "undisturbed. " 100 m (330ft) of relatively undisturbed vegetated areas, rocky areas, or open water >95% of circumference. No structures are within the undisturbed part of buffer. (relatively undisturbed also means no -grazing, no landscaping, no daily human use) Points = 5 100 m (330 ft) of relatively undisturbed vegetated areas, rocky areas, or open Ovate >�� 50% circumference. oin�ts = 4 _J — 50 m (170ft) of relatively undisturbed vegetated areas, rocky areas, or open water>�o circumference. Points = 4 --- 100 m (330ft) of relatively undisturbed vegetated areas, rocky areas, or open water> 25% circumference, . Points =3 — 50 m (170ft) of relatively undisturbed vegetated areas, rocky areas, or open water for> 50% circumference. Points = 3 If buffer does not meet any of the criteria above --- No paved areas (except paved trails) or buildings within 25 m (80ft) of wetland > 95% circumference. Light to moderate grazing, or Iawns are OK. Points = 2 — No paved areas or buildings within 50m of wetland for>50% circumference. Light to moderate grazing, or lawns are OK. Points = 2 — Heavy grazing in buffer. Points =1 — Vegetated buffers are <2m wide (6.6ft) for more than 95% of the circumference (e.g. tilled fields, paving, basalt bedrock extend to edge of wetland Points = 0. — Buffer does not meet any of the criteria above. Points =1 -5,e5T� A tA..IrL —Aerial photo showing buffers H 2.2 Corridors and Connectibns {seep.'81) H 2.2.1 Is the wetland part of a relatively undisturbed and unbroken vegetated corridor (either riparian or upland) that is at least 150 R wide, has at least 30% cover of shrubs, forest . or native undisturbed prairie, that connects to estuaries, other wetlands or undisturbed uplands that are at least 250 acres in size? (dams in riparian corridors, heavily 2rsed gMlel roads, paned roads, are considered breaks in the corridor). YES = 4 points (go to H2.3) NO = go to H 2.2.2 H 2.2.2 Is the wetland part of relatively undisturbed and unbroken vegetated corridor (either riparian or upland) that is at least 50ft wide, has at least 30% cover of shrubs or forest, and connects to estuaries, other wetlands or undisturbed uplands that are at least 25 21 acres in size? OR a Lake -fringe wetland, if it does not have an undisturbed corridor as in the question above? qA CV t ES = 2 points (go to , NO = H 2.2.3 H 2.2.3 1s the wet an �� S within 5 mi (Skm) of a brackish or salt water estuary OR within 3 mi of a large field or pasture (>40 acres) OR within I mi of a lake greater than 20 acres? YES =1 point NO = 0 points Wetland Rating Form - western Washington 15 version 2 Updated with new WDFW definitions Oct. 2008 Total for page August 2004 Wetland name or number H 2.3 Near or adjacent to other priority habitats listed by WDFW (see new and complete descriptions of WDFWpriorlor habitats, and the counties in which they can be found, in the PHS report Itttp:llivditu. iva.,eov/ltahlphslist h t)rr ) Which of the following priority habitats are within 330ft (100m) of the wetland unit? NOTE: tine connections do not have to be relatively undisturbed Aspen Stands: Pure or mixed stands of aspen greater than 0.4 ha (I acre). Biodiversity Areas and Corridors: Areas of habitat that are relatively important to various species of native fish and wildlife (frill descriptions in 1YDFArPHS report p. 152). Herbaceous Balds: Variable size patches of grass and forbs on shallow soils over bedrock. Old-growth/Mature forests: (Old -growth west of Cascade crest) Stands of at least 2 tree species, forming a multi -layered canopy with occasional small openings; with at least 20 trees/ha (8 trees/acre) > 81 cm (32 in) dbh or > 200 years of age. (Mature forests) Stands with average diameters exceeding 53 cm (21 in) dbh; crown cover may be less that 100%; crown cover may be less that 100%; decay, decadence, numbers of snags, and quantity of large downed material is generally less than that found in old -growth; 80 - 200 years old west of the Cascade crest. _Oregon white Oak: Woodlands Stands of pure oak or oak/conifer associations where canopy coverage of the oak component is important (full descriptions ill tYDFYYPHS , ,report p. 158). ,Riparian: The area adjacent to aquatic systems with flowing water that contains elements of both aquatic and terrestrial ecosystems which mutually influence each other. Westside Prairies: Herbaceous, non -forested plant communities that can either take the form of a dry prairie or a wet prairie (full descriptions in WDFW PHS report p. 161). -�LInstream: The combination of physical, biological, and chemical processes and conditions that interact to provide functional life history requirements for instream fish and wildlife resources. Nearshare: Relatively undisturbed nearshore habitats. These include Coastal Nearshore, Open Coast Nearshore, and Puget Sound Nearshore. (full descriptions of habitats and the definition of relatively undisturbed are in g,DFW report: pp. 167-169 and 91OSS013P in Appendix A). Caves: A naturally occurring cavity, recess, void, or system of interconnected passages under the earth in soils, rock, ice, or other geological formations and is large enough to contain a human. Cliffs: Greater than 7.6 m (25 ft) high and occurring below 5000 ft. Talus: Homogenous areas of rock rubble ranging in average size 0.15 - 2.0 m (0.5 - 6.5 ft), composed of basalt, andesite, and/or sedimentary rock, including riprap slides and mine tailings. May be associated with cliffs. Snags and Logs: Trees are considered snags if they are dead or dying and exhibit sufficient decay characteristics to enable cavity excavation/use by wildlife. Priority snags have a diameter at breast height of> 51 cm (20 in) in western Washington and are > 2 m (6.5 ft) in height. Priority logs are > 30 cm (12 in) in diameter at the largest end, and > 6 m (20 ft) long. If wetland has 3 or more priorigabi s — 4 points If wetland has 2 priority habitats 3 poin If wetland has 1 priority habitat----Ioi No habitats = 0 points Note: All vegetated wetlands are b), definition apriorio) habitat but are not included ill this list. Nearby wetlands are addressed in question H 2.4) Wetland Rating Form — western Washington 16 August 2004 version 2 Updated with new WDFW definitions Oct. 2008 1 1 1 1 1 1 1 1 1 3 � 1 1 1 1 1 1 Wetland name or number' E I.1 2.4 Wetland Landscape (choose the one description of the landscape around the 11'etland that best frls) (seep. 84) There are at least 3 other wetlands within'fa mile, and the connections between them are relatively undisturbed {light grazing between wetlands OK, as is lake shore with some boating, but connections should NOT be bisected by paved roads, fill, fields, or other development. points = 5 The wetland is Lake -fringe on a lake with little disturbance and there are 3 other lake -fringe wetlands within'1x mile points = 5 There are at least 3 other wetlands within'/ mile, BUT the connections between them are disturbed — ��% ctap L( �0(4— paints = 3 The wetland is )wake-Ange on a lake with disturbance and there are 3 other lake -fringe wetland within % mile points = 3 There is at least l wetland within % mile. points = 2 There are no wetlands within'!, mile. points = 4 H 2. TOTAL Score - opportunity for providing habitat I —a---I Add the scores from H2.1,H2.2, H2.3, H2.4 TOTAL for H 1 from page 14 Total Score for Habitat Functions — add the points for H 1, H 2 and record the result on P. I" I I Wetland Rating Form — western Washington 17 Augusl 2004 version 2 Updated with new WDFW defi"kions Oct. 21108 Wetland name or number "L' CATEGORIZATION BASED ON SPECIAL CHARACTERISTICS Please deterniute if tire wetland meets the attributes described below arrd circle the appropriate answers and Category. Wetland Type Category. Check aff ,ray cr Mr-ra that dpply:to the wetland. C CIe the Categnfy, i,'hep the a ppi -opriate cis ter Fa are riret. SC 1.0 Estuarine wetlands (seep. 86) Does the wetland unit meet the following criteria for Estuarine wetlands? — The dominant water regime is tidal, — Vegetated, and — With a salinity greater than 0.5 ppt. YES = Go to SC 1.1 NO `4r SC 1.1 Is the wetland unit within a National Wildlife Refuge, National Park, National Estuary Reserve, Natural Area Preserve, State Park or Educational, Cat. I Environmental, or Scientific Reserve designated under WAC 332-30-151? YES = Category I NO go to SC 1.2 SC 1.2 Is the wetland unit at least 1 acre in size and meets at least two of the fallowing three conditions? YES := Categary I NO = Category II Cat. I — The wetland is relatively undisturbed (has no diking, ditching, filling, Cat. II cultivation, grazing, and has less than 10% cover of non-native plant species. If the non-native Spartina spp. are the only species that cover more than 10% of the wetland, then the wetland should be given a dual Dual rating G/Ii). The area of Spartina would be rated a Category 11 while the rating relatively undisturbed upper marsh with native species would be a UII Category 1. Do not, however, exclude the area of Spartina in determining the size threshold of 1 acre. — At least 3/ of the landward edge of the wetland has a 100 ft buffer of shrub, forest, or un-grazed or un-mowed grassland. — The wetland has at least 2 of the following features: tidal channels, depressions with open water, or contiguous freshwater wetlands. Wetland .Rating Form — western Washington 18 August 2004 version 2 Updated with new WDFW definitions Oct. 2008 fl 1 Wetland name or number � SC 2.0 Natural Heritage Wetlands (see p. 87) Natural Heritage wetlands have been identified by the Washington Natural Heritage Program/DNR as either high quality undisturbed wetlands or wetlands that support state Threatened, Endangered, or Sensitive plant species. SC 2.1 Is the wetland unit being rated in a Section/Township/Range that contains a Natural Heritage wetland? (this question is used to screen out most sites before you heed to contact NWHP/DNP) SMR information from Appendix D _ or accessed from WNHPIDNR web site YES — contact WNHPIDNR (see p. 79) and go to SC 2.2 NO X SC 2.2 Has DNR identified the wetland as a high quality undisturbed wetland or as or as a site with state threatened or endangered plant species? YES = Category I NO X not a Heritage Wetland SC 3.0 Bogs (seep. 87) Does the wetland unit (or any part of the unit) meet both the criteria for soils and vegetation in bogs? Use the key beloiv to identify if the wetland is a bog. If j,ou answer yes you will still need to rate the wetland based on its functions. 1. Does the unit have organic soil horizons (i.e. layers of organic soil), either peats or mucks, that compose 16 inches or more of the first 32 inches of the soil profile? (See Appendix B f�. field key to identify organic soils)? Yes - go to Q. 3 go to Q. 2 2. Does the unit have organic soils, either peats or mucks that are less than 16 inches deep over bedrock, or an impermeable hardpan such as clay or volcanic ash, or that are floating on a lake�or pond? _ Yes - go to Q. 3 No I Is not a bog for purpose of rating 3. Does the unit have more than 70% cover of mosses at ground level, AND other plants, if present, consist of the "bog" species listed in Table 3 as a significant component of the vegetation (more than 30% of the total shrub and herbaceous cover consists of species in Table 3)? Yes — Is a bog for purpose of rating No - go to Q. 4 NOTE: if you are uncertain about the extent of mosses in the understory you may substitute that criterion by measuring the pH of the water that seeps into a hole dug at least 16" deep. If the pH is less than 5.0 and the "bog" plant species in Table 3 are present, the wetland is a bog. 1. is the unit forested (> 30% cover) with sitka spruce, subalpine fir, western red cedar, western hemlock, lodgepole pine, quaking aspen, Englemann's spruce, or western white pine, WITH any of the species (or combination of species) on the bog species plant list in Table 3 as a significant component of the ground cover (> 30% coverage of the total shrub/herbaceous cove)}? 2. YES = Category I No Is not a bog for purpose of rating August 2004 Cat. I Cat. I Wedand Rating Form — western Washington 19 version 2 Updated with new WDIW definitions Oct. 2011 Wetland name or number SC 4.0 Forested Wetlands (seep. 90) Does the wetland unit have at least I acre of forest that meet one of these criteria for the Department of Fish and Wildlife's forests as priority habitats? Ifyov answer yes you will still creed to rate the wetland based on its functions. — Old growth forests: (west of Cascade crest) Stands of at least two tree species, forming a multi -layered canopy with occasional small openings; with at least 8 trees/acre (20 treesthectare) that are at least 200 years of age OR have a diameter at breast height (dbh) of 32 inches (81 cm) or more. NOTE: The criterion for dbl} is based on measurements for upland forests. Two -hundred year old trees in wetlands will often have a smaller dbh because their growth rates are often slower. The DFW criterion is and "OR" so old -growth forests do not necessarily have to have trees of this diameter. — Mature forests: (west of the Cascade Crest) Stands where the Iargest trees are 80 — 200 years old OR have average diameters (dbh) exceeding 21 inches (53cm); crown cover may be less that 100%; decay, decadence, numbers of snags, and quantity of large downed material is generally less than that found in old -growth. YES = Category I NO trot a forested wetland with special characteristics Gat. I SC 5.0 Wetlands in Coastal Lagoons (seep. 91) Does the wetland meet all of the following criteria of a wetland in a coastal lagoon? — The wetland lies in a depression adjacent to marine waters that is wholly or partially separated from marine waters by sandbanks, gravel banks, shingle, or, Iess frequently, rocks — The lagoon in which the wetland is located contains surface water that is saline or brackish (> 0.5 ppt) during most of the year in at least a portion of the lagoon (needs to be weastrred r ear the bottoin) YES = Go to SC 5.1 NO not a wetland in a coastal lagoon a SC 5.1 Does the wetland meets all of the following three conditions? — The wetland is relatively undisturbed (has no diking, ditching, filling, cultivation, grazing), and has less than 20% cover of invasive plant species (see list of invasive species on p. 74). — At least 3/4 of the landward edge of the wetland has a 100 ft buffer of shrub, forest, or un-grazed or un-mowed grassland. Cat. I --- The wetland is larger than 1/10 acre (4350 square feet) YES = Category I NO = Category 11 Cat. H Wetland Rating Form — western Washington 20 August 2004 version 2 Updated with nexv WDFW definitions Oct. 2008 1 1 Wetland name ar number ` 5C 6.0 Interdunal Wetlands (seep. 93) Is the wetland unit west of the 1889 line (also called the Western Boundary of Upland Ownership or WBUO)? YES - go to SC 6.1 NO .not an interdunal wetland for rating Ifyou answer yesyoit will still need to wale (lie wetland based on its fi ndions In practical terms that means the following geographic areas: • Long Beach Peninsula- lands west of SR 103 • Grayland-Westport- lands west of SR 105 • Ocean Shores-Copalis- lands west of SR 1 l 5 and SR 109 SC 6.1 Is the wetland one acre or larger, or is it in a mosaic of wetlands that is once acre or larger?, YES = Category II NO — go to SC 6.2 Cat. II SC 6.2 Is the unit between 0.1 and 1 acre, or is it in a mosaic of wetlands that is between 0.1 and 1 acre? YES = Category III Cat. III Category of wetland based on Special Charactertshcs C`hoos the ';rrghest'° rating !f yetIand falls rota server q Tcategtorres, arrd record IF au a`nswered.IO for all,,: es:;enter"Not,A '.tcable" on: J 1 1 Wetland Rating Forn3 — western Washington 21 August 2004 1 version 2 Updated with new WQFW definitions Qct. 20111 x � s � 1 w � 1 1 1 1 1 1 1 1 1 1 1 1, A�..g > �, Ley` y'S-d Tza i U3 3 { I� { `r r� f~ J_ t � w AR Ar— I...:....1 � yL h• ii � I II y " ti r U7 m yak.r t b�l � r Ud r 14 a 0 F�- r- �i W rj � o SII p # } G _4 1 II f _I. 9 V A- o a0 C LL m n 9 IL ,n M. rLQ 5 Ek r rr' d ! d 1 I 1 1 I 1 1 East Renton Lift Station - Wetland, Stream and Wildla;fc, Stud)' APPENDIX D: WETLAND DETERMINATION DATA SHEETS ESA APpendi.x D JOY 2011 1 I 1 WETLAND DETERMINATION DATA FORM — Western Mountains, Valleys, -and Coast Region CItyJCounly; � �a r '"f .Sampling Date: 2-9 fif ;Slate:. _ Sampling Point: _ " U ple;-� Section. Tdwnshlp: Range: kilt Landform (hlllslapre, terta:e; a[�): 1 C 'r"t1,1 u't ",; f VCI Local relief (concave, convex nano]:: Slnpe:(°h): .S Subrbilon'(LRR):. ih Lat: Long:: Datrim:. - Stibl Map_flnit Name:., A-/. / NO classification: Are`.dimaUC l hydroiogic condlllons• an�e: site typlcal for -this time of year?. Yes V Na (IF.no,. explain 0i Ramsrks.}- / F1re Uegetatlar7 Soli ar Hydrology significantly olsturbed? Are"-Norirlal'L'lrctimstances".presenl7• Yes, ✓ No Are.Vegelatian ;Soli oe Hydrology naturally problematic? (If needed, 601sin aqj►: errsweis In Remarks:} SUMMARY OF ftNDINGS Attach site map showing sampling point.locabons, #cinsec ,.,importantfeatures, etc. liydrophyltc=Vepeiatfon.'Pre9er,t2. -Yes% .No is the 5ar6pled_Area_ �Hydrlc 5611 Pr ItV Yes No if within a Welland? � . -Yes Nc ___�__,� {Nellend`Hydrology'�Present? Yes: Nn 'Remarks: ....... _ ............ . VEI=TATIQN-.LJse, scientific; names of plants. Ttee ) Absolute Dominant indicator Cover -S es7 Slatue Dominance Test worksheat: 8tratutn (plot size: met 5't i . �_ -- G 'f 11�Vt Nurn6erof;l)ominant species Thk-Are "6k, PAdW FAC t Y.1 - ar tA) -2�.P�uulu.c 1�alsarr;�r�'d� �O Tntat iv mbendbominant. ' Sppclee;Across All Strata. (B) percent afamTnarll:Sperles 1ttisE Are t3BL, AC1N, or: AC: : - ! (A1B) -3: ALnL-&S Ci 1' .- - - --- — -- �. 4" `� _ = Total payer Saallnplshru6Stratum (PJoi size: Prevate�ce; lnaez,uforkshee# Tatar°%,Cnver'aF MUlllnly 7 i ACl 2..:C: - S[dq CV ►V- �� 3 �,c,1-�x Scouresra.na� - �. �AGW oBt_specles k 1 = .. SAC species x 3 = - FAdU species 5; 1 Talel.Cover cS Herb Slialum': (Blot size:.: V: URL.spetfes. (a) Prevalence Index B/A.=. 3.•. A. Hytl phyti Vogel tiorr Indicators:.: !p'oininanca,Tesl,ls>5495 8 , Predalence lndex la s3.0' _ Morphuioglaal Adaptailonsl. (Pravlde supporting 7 . da4s in ReJilarks-or'aria'sepafale.sheel) WeEanci i+forrllascuiar.plants� -9 _ Prablernatie Hydrophy0c..Ypgelatlan, (Expialn) 'indicators'ar}rydric soil and wetland hytl 'Iogy must tie:present, unless tlisturtsed orprobiematlq.` '���•: } 5 f =.Tn1al:Cover• WaodY-Vtie 5trawin (Plot size;.. 7 1. 4 -vlv�SyCSbnL4 S _ � > �� Hydrophytic. Y,zgetagan . Piesent7 Yes No. _ 2IxcS i�.ini '..'1 t S�t;iA -) - Total Cower %':Bare GrPund In Herb Stratum 1 Remarks::..: ' �� r n� l �-{- c� � �n pP� � � G'� �0.[�1rl�i,g-27 ��"'U•C'C.I—�-C`o� r Wi-moJ A) US"Army Corps.of Engineers Western Mountains; Valleys; and Coast'--inlerim Version S0IL sampling Point Dp i Profile-Aescrlptlon: (Describe to the depth needed to document the Indicator or confirm the atmence:of.indicators.) Vepw. Matrix e • tx Features finches Caliir irJloisi} _ _ _Garay lrna}sti :- hfi Bpe "jDYiz L� liituee ReMarks t- 2 1 S—g5. ia•t!� 3 �- I_CL7 s dY4 I. 17 a.-C=4ohcenfrafth D-De tenon:. RMzFRWdced.Malrac::CS=Coveted or:Coaled Sand Giains: �kacell6k PL•=Pdre Ll 66—. wMibixz l'lydrig:Soil, tndl6itorap (Appllcable to all LLRFs.. unless otherwise noted:) lndicato►s for'Ptablematic Hydrlp Solle-: Hislosbl_(A1j Sandy,Redaz (55) � Hislicfplpadcn.(A2) — Sbipped Matnx (SO) . _ -Red Parent Material {TF2}^ — Blau Hisllc;(A3} — Loamy $lucky Mineral.(F1) .(except MLRAA): -.Qlher (Explain 1n;Rarnarks), - _ Hydrageri Sullldd (AA) — Lo' my Gleyed Mal& (F2) — `l7epleled8elosrr.Dar)C;Sudace (A11) Depleted:MelrHr Thlek-Dark Swfaea (Al2) — Redax Oark Surface' (F8) Indira5regetalfon-an_d —Sandy Mucky Mineral Deplaled dark Surface.{F7] vvetlend;}lyd�o�ogy:m�stbe;present, .— t3endy Gleyed.Matr ic.(S4).. Radox Depressions ( B) — un�,dlstyoo pr pr0lematic., ss Restrjetivela er, i f Present Tye:':. D pitt {Inches} H ilric y ... ;Bart _PiasentR Ves fJo - t/ Remarks - HYDROLOGY •,Walland,tlyrdralagy`lndicetons: - .Pifr,W!Fnik6"glrn6nj of one r erred• cl-fork Ala [ &econiii(ry liidEcefois i2=ai mitre regdiredl _ Suriace Water.{A1) 1ilfater Stained Leaves (B9} {except MtRA N Waler�Stalned Leaves (BO) {jiIILRA FiigEt. Nater 7ahle (Ax) —_ , 2, 4A,.and 4B U and 4B) 5aiUracn {Aa'j .Sall Crust {B1:1) _ t]rafnage PaftetnsB70j. _ Water Marks,{91) Aquatic invertebrales;(S18) „_.. Dry,Seasan WaterTeble(G'�) Sedhon! Deposils;(B2) _: Hydrogen Sulfide Odof (C.1) _ •5sturatlan Visltate bri ket}al.lirtagary M) �. Drlfi;Qepo9(ts"{63) _„�icldlxed Rhlwaptieres alang.Lijring'Ro6ts;{C3) ._ Getinsorptilc.Pec6ion {Di]. — Alga! Mat"orGftist::{B•4} _ Pr'eserice of i�educed:troii:{C+l): � Shagrnni:AQNltsrd:{D3} Irriii De asps {B5} ^ ,Recent iron•:Redu6 lon in'Tilled'Salts (C6) :_: F/iC_ leiitral.Tasl (C5j': _ .5urfade Sp�I.,Crecks (55) W . 5trinied or:Stressed. Plants (01) (LRR• A) Re)sed Ant Mburids(P6) {LRR A) _>iiitinclatlori Vlsible;onAeria! lmegr ry.(87) _ _ Other. (Earplairl In Remarks} _.F[ost'Heave.Hummaeks'ta7} _ Sparsely Vegeleted,Concave Stirfaae ,(138) t=leld iDBservatlons:: &urrace;lNalerl?resent4 Yes No-� pepth.(inahes): Water TablePfesenl7 Yes 140 1 Oeptit(Inches) saturatloi7 preserit7: Yes: No pept}t ({nches} 11Yet1and:HydiologyPresenf?, Yes. No [ncludss:ca lira fringe) Desciib.11i'Recorded Data (stream gauge, monlloring well, aerial pholos,L previous irispeclions); Itavellable: Remarks: US Army Corps ofIEnglnears W aster Mountains; Va.11eys acid Coast - lnterlm Version 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 i Western Mountains, Valleys, and Coast Supplement to the 1987 COE Wetlands Delineation Manual Project Site: tt9LS� s1 irti 5 r•�n� Sampling Date: Ji 6-9 1 6.9 Applicant/Owner: Sampling Point: 'DP Z — , Investigator- CItylCounty t! ( Mlff l �J Section, Townsirlp, Range: State: WA Landfarm (hillslope, terrace, etc) rf\ I Cf(�j� +� Slope (%) Local relief (concave, convex, none) Subregion {LRFt) Lai Long Datum Soil Map Unit Neme A-r^ ( NWI classification Are climatirlhydrologlc cond}tlons on the sits typical for this time of yearT 11KIYes Q No (if no, explain in remarks.) Are "Normal Circumstances" praseht on the site? Yes 0 No Are Vegetation ©, Sall, ❑, or Hydrology t7 signlfi6ently disturbed? Are Vegotatian [], Sell, 0, or Hydrology 0 naturally problematic? (If needed, explain any answers In Ramarks.) SUMMARY OF FINDINGS - Attach site MaE showln earn Iing point locations, transects, important features, etc. Hydrophyifc Vegetation Present? Yes I� No Is this Sampling Point within a Wetland? X1 Yes � No Hydrfc Sills Present? 9 Yes No Welland Hydrology Present? m Yes No Remarks_ Fi+ 1 occ-4`rGc( . tti' 15 - Zsry 1 e,,A 1)10 �s-IrY -F.r s+ 0- VEGETATION -- Use scientific names of plants. r Tree Stratum (Plot size L)_ ) Absolute % Dominant Indicator Cover S das? Status Dominance Test Worksheet NumbarofDominant Species that are d13L, FACW, or FAC: (A) ou l�, s o �5� �•� cco� D (� 3, t. • G ' 't l 7o IA, Total Number of Dominant Spades Across All Strata: {B) ti 4, f/ Pr41�rr�r�e,.�5 vf5�•+.artio., t7 1 Sapling►shrub Stratum {Plot size w Toral Cover Percent of ➢ominant Species f that are OBL, FACW, or FAC: ! {AJB) Prevalence Index Worksheet Ttat Caerof MUIVolvhv OBI -species ' x 1 = 7 L �t�d"rs '^ iSGuto{ 3.• t tl aL'c 'firs S b :VAL, 4. FACW species x 2 = s. FAC spades x 3 = I Herb Stratum (Plot slza ) Tolal cover FACU spedas x 4 = UPL species x 5 = Column totals (A) B t. Prevalence I ndex = 81 A = 2. 3. 4. Hydjmph yttc Vegetation Indicators b. Dominance test is > 50% 0. Prevalence test is s 3,0 ` 7, Marphoraglcal Adaptations' (prpvtde supporting data In remarks or on a separate shoes) 9, 91 Watiend Non Vascular Plants ` 0, Problematic Hydrophylic Vegetation • (axplaln) • Indlealors of hydric soil and wetland hydrology must be resent unless disturbed or prublemauc WGody Vine Stratum Plat size fr =Total Cover Hydrophytic Vegetation Yes No El Present? t. DnPI 2. =Total Cover % Bare Ground in Harb Strahrin 9 Remarks:. rr, a5 S y !1r"6T t}�C r 1 G�^ C S �r+cisrC S 8l^w u"" ti� US Army Corps of Engineers Western Mountains, Vatleys, and Coast - Interim Version Silo V�rnnllnn k�nkn*�+1 l v � 77-7 Profile Deese rl lion: Describe to the depth needed to document the indicator or confirm the absence of Indicators. Depth Matrix Redox Features inches T re Remarks Color moist % Color moist % TypelLoc 0— 1 10 9. Ioo s'i4 o t orca�i 3 2- 33 a � lour 3 .5 K•r-t to 'Type: C=Concantration, D=Deprodon, RM=Reduced Matrix, CS=Covered or d Sand Qns L=Pare Lining, M=Matrix H dric Soli Indlcators. (Appllcabfa to all LRRs unless otherwise noted,) Indicators for Problematic Hydric Salle,, � {] Hisiosol (Ai) Sandy Redox (S5) ❑ 2cm Muck (Ail}) Histic Epipadon (A2) ❑ Shipped Matrix (SS) ❑ Red Parent. Materiaf (TF2)' [:1 Black Histic (A3) ❑ Loamy Mucky Mineral (F1) (except MLRA 1) Other {explain In remarks) ❑ Hydrogen Sulfide (A4) Loamy Glayed Matrix (F2) Depleted Below Dark Surface (Al 1) ❑ Depleted Matrix(F3) ❑ Thick Dark Surface (Al2) ❑ Redox Dark Surface (F5) Indicators of hydrophyllc vegetation and walland hydrology must. Sandy Mucky Mineral (Si) ❑ Depleted Dark Surface (F7) be present, unless disturbed or problematic ❑ Sandy Glayed Matrix (S4) Redox Depressions (F8) Restrictive Laver (if present): Type: Yes No ❑ Hydric soli Depth (inches): present? Rsmarlks: _ �V6� .6-eer, ally , r � 1 �,'�" 4��. ��, t� ��c� ?�6a.�� L" T9, • : . Wetland Hydrology Indicators: Primary Indicators (minimum of arm raqubed: check all that apply): Secondary lndlcalors (2 or more raqutradj. © Surface water (Al) ❑ Spi3moly Vegetated Concave Surface (811) Water -Stained Leaves (89) (MLRA 1, 2, 4A & 48) High water Table (A2) Water -Stained Leaves (except MLRA 1, 2, 4A & 4B) (BB) Drainage Patterns (B10) Saturation (A3) ❑ Sall Crust (Bi 1) Dry -Season WaterTable (C2) ❑ Water Marks (B1) ,Aquatic Invartobrales (B13) Saturation Visible on Aerial Imagery (Cg) Sediment Deposits (B2) - -_.w La- - --Hydrogen-Sulfide Odor (01) - . -Geomorphlc Position (D2). Drift Deposits (B3) ❑ Oxidized RNzospheres along Living Pwots (C3) Shallow.Aqultard (03) Algal Motor gust (B4) Presence of Reduced Iron (C4) FAC-Noutral Test (05) Iron Deposits (135) ❑ Recent Iron Reduction In Tilled Sells (CB) Raised Ant Mounds (Dfs) (LRR A) . Surface Sall Cracks (BB) ❑ Stunted br Stressed Plants (01) (LRR A) Frost -Heave, Hummocks Inundation Vislble on Aerial Other (expletn In remarks) Imagery (B7) Field Observations Surface Water Present? ❑ Water Table Present? ❑ Yas Nd Depth (in): Yas No Depth (in): Wetland Hydrology Present? Yes Na ❑ Saturation Present? ❑ Yes No Depth (In): (Includes capillary fringe) Describe Recorded Data (stroam gauge, monitoring well, aerial photos, previous inspections), If available: Remarlrs:kFi O'r1 a.' ip t n kin C<, f C�- SOt L t�• k �tnrrit-n S� Lr/-r,fi rye V1, , tfn �� r 2t�va� U.S Army Corps of Engineers Westem Maunialns, Valleys, and Coast— Interim Verafon I Western Mountains, Valleys, and Coast Supplement to the 1887 COE Wetlands Delineation Manual FmjectSite: Q-9"ilt,�A t 3�k Vr� Sampling Date: 1 AppllcanUOwner. � �f •n n V— fyri ( r Sampling Point I CltylCount)r Section, Township. Range: State: WA Landform (hillslope• terrace, etc) �� p Slops (°in) 0 Local mile( (concave, canvex• none) Suhreglon (LRR) " Let Long Datum Soil Map Unit Name �- NW I classification Are cl[meticJhydrologtc conditions on the site typical for this time of year? yes [INo (If no, explain In remarks,) Are "Normal Circumstances' prasaat an the site? Yes El No Are Vegetation ❑, Soll, Q, or Hydrology ❑ signiRdady disturbed? Are Vegetation ❑, Sol{, ©, or Hydrology ❑ naturally problematic? (If needed, explain any answers In Remarks.) SUMMARY OF FINUINGs — Atmen site map snowmg saMl3HqU P01n1 rOgauons, rransecrs, rmpvnans MUSL wise, ULU. Hydrophytic Vegetation Present? Yes No is this Sampling Point within a Wetland? ] Yes ED No Hydric Soils Present? Yes LEI J No Welland Hydrology Present., Yes I ❑ I No VEGETA-110N -- Use scientlf c names of plants Tree Stratum (Plat size - � 1 ] Absolute % Cover Dominant Indicator 5 ecles? Status Dominance Test Worksheet X t'} Number of Dominant Species that are OBL, FAGW, or FAC: (A) 4F�+ .c'. A +� +`,��r {r i 3, V Total Number of Dominant Species Across All Strata: (B} 4. r Sap11ng1Shrub Stratum (Plotsiz" =Total Cover Percent of Dominant Species that are OBL, FACW, or FAC: (Alg) Prevalence index worksheet --TQ1MLy2 var f Multiply by flBL species X 1 = Z - 4..� .1,. ,1.. C r,n [-f sY., r.� U-- �= [ 61 3:= v� �cili !. a(1�C� A. m u( ��y l.x_r6]1 'a, r.t i h;- FACW epodes x 2 = 2 0 FAC species J i) x3 r 3 p r Herb Stratum (Plat sized ) Totes corer FACU species nr% x 4 = 7 _L - UPL species p x 5 = Column totals (A) B 1 Prevalence Index = B 1 A= p 3. �1?Gtrti a-iif. Ii ,i � ,,, „ ,-,, •stir ti•*n � �i �/ d. r M dra h tic Vegetation Indicators 5 Dominance test Is > 50% B=Z ]G Prevalence test Is S 3.0' 7 Morpholoalcal Adaptations' (Provide supporUng data In remarks or on a separate sheet) S 9 Welland Non -Vascular Plants ' �0 Problematic Hydrophytic Vegetation • (explain) 11. ' Indicators of hydric soil and wetland hydrology must ba resent unless disturbed or problametla Woody Vine Stratum Plot size =Total Corer Hydrophytic Vegetation Yes No ❑ Present? 1. y =Total Cover % Bare Ground In Herb Stratum -! RorneAs. US Army Corps ar•Engdneers Western Mountains, Valleys, and Coast lnferim Version SUIL xamnunn `+ninr i IV - Profile Description: Describe to the depth needed to document the Indicator or conllrm the absence of Indicators. Depth Matrix Radox Features inches Texture Remarks , Color moist % Color moist % T e Lac 4I In 4 A Lo 'Type: C=Concentration, D=Doplation, RM=Reduced Matrix, CS=Covered or Coated Sand Grains zips: PL=Para Uning, M=Matrix H drlo Sol] Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric SoII0 ❑ Histosol (Al) © Sandy Rodox (55) © 2cm Muck (Al0) ❑ Histic Epipadon (A2) Stripped Matrix (SE) Red Parent Material (TF2) Black Histic (A3) ❑ Loamy Mucky Mineral (F-1) (except NILRA 1) tither (explain in remarks) Hydrogen S ulfide (A4) ❑ Loamy Gleyed Matrix (F2) ElDepleted Below Berk Surface (Al 1) Depleted Matrix (F3) ❑ Thick Dark Surface (Al2) Radox Dark Surface (FS) x Indicators of hydrophydc vagalation and wetland hydrology'niusl. Sandy Mucky Mineral (S1) ❑ Depleted Dark Surface (F7) be present, unless distuFbad or problematic ❑ Sandy Gleyad Matrix 094) ❑ Radox Depressions (F,S) Restrictive Laver {if present): Type. Hydric soil present? Yps No ❑ Depth (Inchas): Fterttartcs: 5 Co'� Lcors o-' . .bd�+�1E,�vjpwti HYnROLOMY Wetland Hydrology Indicators: Primary Indicators (minimum of one required• check all that apply): Secondary Irrdkators (2 or more required): Surface water (Al) Sparsely Vegetated Concave Surface (BB) Water -Stained Leaves (39) (INLRA 1; 2, 4A & 4113) y High Water Table (A2) WelarStalned Leaves (except MLRA 1, 2, 4A &4B) (BB) Drainage Pattems (1310) r Saturation (A3) EF Salt Crust (B71) Dry -Season Water Table (C2) Water Marks 031) ❑ . Aquatic invertebrates (H13) Saturation Visible on Aerial Imagery (09) Sediment Deposits (B2) - -,- - :-p- Hydrogen -Sulfide Odor(C1) Geamarphlc Position (D2) lFrost-Hearva Drift Deposits (B3) ❑ Oxidtzad Rhtxnspheras along Living Roots (C3) Sha€low•Aquftard (D3) Algal Mat or Crust (H4) Presence of Reduced Iron (C4) FAC-Neutral Test (05) Iran Deposfls (135) Recent Iron Reduction In Tillad Soils (CO) Raisad Ant Mounds (D6) (LRR A). Surface Sol] Cracks (e6) Stunted 6r Stressed Plants (Di) (.RR A) Hummocks Inundatfan Visible an Aerial ❑ Other (explain In remarks) Imagery (B7) Field Observations Surface Water Present? ❑ Water Table Present? Yes Yes ❑ Na Depth (In): �� No Depth (In): y 7j Wattand Hydrology Present? yes �' No ❑ Saturation Present? Yes No Depth (]n)•r) tl�i (includes capillary fringe) Describe Recorded Date (stream gauge, monitaring well, aerial photos, previous inspections), if available: Remarks: cr (�t:'�.�_ �l'C G� � � Sri 71 �f� (�'� l•'1 l J� Cam` --� t 6- t,,17-lA- �[, it C, Y�„1t. r\-CtL Lis Army Carps oft:ngInaars Westem Mountafns, Valleys, and Coast- Interim Version 1 1 1 1 I I 1 I I I 1 Western Mountains, Valleys, and Coast Supplement to the 18B7 COP Wetlands Delineation Manual I I [ 1'+h 3 F fl Sampling Dale: Applicant/Owner ( F 11 �. civ. i L r.� Sampling Point: FPpes YJ t ' Cltylcounty: �Ltr� ship, Range: State: WA n iopn, terrace, etc) ryt� c� Slope (°k} Local rolief (concave, convex, none) LRR) Let Long Datum itNamo �71 NWI classification hydrolDgio conditidrfs on the site_ typical for this time of year? Yes ❑ No EZ'-etrm6il Or no, explain in remarks.) Clroumslantes" presaht on the silo? yes Na tion 0. Sall, ❑, or Hydrology ❑ significantly disturbed? tion 0. Son, ❑ . or Hydrology ❑ naturally problematic? (Ir needed, explain any answers In Remarks.) SUMMARY OF FINDINGS — Attach site mae showing sampling oint locations, transecu, important features, etc. Hydrophydc Vegetation Present? Yes No Is this Sampling Point within a Watland? Yes FW ND Hydric Soils present? ME) YesIt No WallandHydrology Present? Yes No VEGETATION — Use scientific names of plants. I Trae Stratum {Plat size �i ] Abschrta Caysr Dominant S ecies? Indicator Status Dominance Test Worksheet Wo Number of Dominant Speclas that are OBL, FACW, or FAQ (A) Spedcas Anass All Strata Total Number of t (B) 4• Seplingl5hrubstratwg (Plot size C =ToW over Percent of Dominant Species that are ❑BL,'FACW, or FAC: (p JB) 1 n S hit S/l �r n v A r S Prevalence Index Worksheet Cover of Mulliply b 08L spades x 1 = z • WTotal 3' 9-0 b3Ui, b 11; 4. FACW spades x 2 = s. FAC species x 3 = J Herb Stratum (Plot size ) =Total Cover FACLI species x 4 = UPL species x a = Column totals B (Al-175 Prevalence Index = B I A = f' 2. 3. -fir �... w., rr..�ri r1Le.►•r. S 4. Hydrq y6c Vegetation Indicators tMminance lost is > 60 % g, Prevalence test is s 3.0 • 7_ Morphological Adaptations' (provide supporting data In remarks or on a separate sheet) B. y- Welland Non Vascular Plants ' q0, Problametls Hydrophylic Vegetation • (explain) t1. r • Indiootom of hydric sail and wetland hydrology must be msont, unless disturbed or problematic Woo V1ne Stratum Plotslza =Told Cover Hydrophytic Vegetation Yes No ❑ Present? 1. tA,Y ,s S VGt�u{ s� f 2, t-0 f D e' ' — =Tate€ Cover Bare Ground in Herb Stratum Remarks; U5 Army Carps of Fngfnasra Wesism Mountains, Valleys, and Coast— lnferim Version S011 Samnllno Polnt '% 1 I -t Profile Descri Hon: Describe to the depth needed to document the Indicator or confirm the absence of Indicators. Depth Matrix Redox Feahlres inches nlor most % Color moist % Type Lac Texture Remarks Soh 'Typa: C=ConcantrMtion, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grains' 21-ac PL=Pore lining, M=Matrix H drlc Sol[ Indicators: (Applicable to all LRRs unless atherwlse noted.) Indicators forPrnblematic Hydrlc Soils' Hlsiosol (At) ❑ Sandy Redox (S5) FEI-1 2cm Muck (Al0) H[stic Bpipednn (A2) ❑ Stripped Matrix (Se) ElRed Parent Material (fF2) Black Hlstic (A3) G] Loamy Mucky Mineral (Fi) (except MLRA 1) ❑ Other (explain In remarks) ElHydrogen Sulfide (A4) Loamy Gleyed Matrix (F2) Depleted Below Dark Surface (All) ❑ Depleted Matrix (F3) Thick Dario Surface (Al2) Redox Dark Surface (FS) 7lndicatgrs. of hydrophytic vegetation and wetland hydrology must. El Sandy Mucky Mineral (Si) ❑ Depleted Dark Surface (FT) be present, unless disturbed or problBmatic Sandy Gleyed MaWx (S4) Redox Depresslons (FB) Rastriative Laver Of present): Type- — Hydric Bali present? Yes ❑ No Depth (Inches): Remarks: Wetland Hydrology Indicators, Pdmarylndlcalora (mirrlmum ofena required: check all lhetapply). Seaandary fndfcalom (2.ormore requlmd). Surface water (All).. Sparsely Vagatated Concave Surface (BB) Watar-Stalnad Leaves (139) (htLFlA 1, 2, 4A & 413) Hlgh Water Table (A2) ❑ Water -Stained Laaves {except MLRA 1, 2, 4A & 4B) (B9) Drainage Patterns (010) Saturation (A3) El SaltCrust(1311) Dry -Season Water Table (02) Water Marks (81) ❑ .Aquatic Inverlabratas (B13) Saturation Vialbla an Aerial Imagery (C9) Sediment Deposits (B2) - -----❑--Hydrogen-SulHdeOdor r(Ct) -G0omogWcPosi9an(02)- __ ....-...u.._w Drift Deposits (B3) Oxidized Rhfzoaphares along Living Roots (C3) Shallow.Aquitard (D3) Algal Mal or Crest (84) ❑ Presence of Reduced Iron (C4) FAC-Nautral Test (DS) Iron Deposits (B5) ❑ Racent Iran Reduction In Tllled Gas (06) Ralsed Ant Mounds (DG) O-RR A), Surface Soil Cracks (86) Stunted dr Stressed Plants (❑1) (LRR A) Frosl-Heave Hummocks Inundation Visible on Aerial ❑ Other (explain In remarks) Imagery (B7) Field Observations Surface Water Present? ❑ Water Table Present? Yes YeaFK No Depth On): No Depth pn): Wetland Hydrology Present? Yes ❑ Na Saturation Present? Yes -0 No Depth (In): (Includes caplllary fringe) Describe Recorded Data (stream gauge, monitoring well, aerlal photos, previous inspections), if available: Remarks., US Army Corps of Engfnaem Wastem Mountains, Valfays, and Coast- Interim Verslon 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Western Mountains, Vatfeys, and Coast Supplement to the 1997 COE Wetlands Delineation Manua) Project Site: '� o� 5kn �b'r7 �i . C,,�a�/j./. Sampling Date: 2-R. Q ApplicantlOwner: 17jy4jv1+ V, Le Sampling Point Investigator: Shl /lzv, 4 Clty/Gaunt)r Section, Township, Range: State: WA Landfban (hitlslope, terrace, etc) Slope ('YoJ �� Local relief (concave, convex, none) Subrmgian (LRR) A J Lot Long uatum Sall Map Unit Name NWl classtatfon E D 0 Are climauc4lydrologic conditions an the site typical far this time of year? Yes ❑ Nv (if no, explain in remarks.) Are'Normal Circumstances" prssehton the site? Yes L QJ No V� Arm Vegetation ❑, Solt, ©, or Hydrology 13 slgnikantly dlsturbed? Are Vegetation El. SOIL ❑, or Hydrology ❑ naturally problematic? (IF needed, explain any answers In Remarks.) SUMMARY OF FINDINGS -Attach site map showin sarngling 2olint locations, transects important teatures, etc. Hydrophytic Vegetation Present? I R1 I Yes ❑ No Is this Sampling Point within a Wetland? Yes [a No Hydric Sails Present? W Yes ElNo Wetland Hydrology Present? Yes = No Remarks: VEGETATION - Use scientific names of plants. r Tree Stratum (Plot size cab 1 Absolute "% Cover Dominant species? Indicator Status _ Dominance Test Wofksheet 1: p t'Jws ` 0^"4g!,r0_ NumbeirofDominantSpecies that ara OBL, FACW, or FAC, (A) 4 3b G 3, Total Number of Dominant -Spades Across All Strata: (S) q, SaplinglShrubStratum (Plotstxa i� ? �(}, =Total Corer Percent of Dominant Species that are OBL, FACW, or FAG: j (A113) �, A�rtius r u, a A j Prevalence Index Worksheat Total Cover of Multiplyh OBLspeclas x 1 = r 1� 3r q. FACW spades x 2 = 5, FAG spades x 3 = Herb Stratum (Plot size y } =Total Cover FACU species x4= UPL epodes x 9 = Column totals {A} B 1. Rea-rc�n`k(u� 10 3� (1 W Prevalence Index = B 1 A = 2 - 3. q, HycIrpphyfic Vegetation Indicators 6. Domtnanco test le > 50% .6 Prevalence testis 5 3.0 ' 7. Morphological Adaptations(provide supporting data In remarks or on a soparsta sheet) g, g, Welland Nan -Vascular Plants ' 10, Problamatie Hydrophor, Vegetation ' (explain) 11. " Indicators of hyddc soil and wetland hydrology must be resent unless disturbed or problametic Woody Vine Stratum Platsize 10 =Total Cavar Hydrophytic Vegetation Yes 5cl No ❑ Present? f t. o.3'MC+�0.tJtat5 2. uta+5 5 new S G = Total Cesar % Bare Ground In Herb Stratum Remarks: US Army Corps nfEaginsers Westem Mountalrrs, Valleys, and Coast -Interim Version kfeltn Camnhnn Gnint % I V —s Profile Description. Describe to the depth needed to document the Indicator or confirm the absence of indicators. Depth Matrix Redax Features Inches Texture Remarks Color moist % Color moist °/, TYPI31Lac ra c a ll s L a • O 7 t a 'Type: C=Concentration, Da Depletion, RM=Reduced Matrix. CS=Covered or Coaled Sand Gtalns koc: PL=Pore Lining, M=Matrix H dric Solt Indicators' {Applicable to all LRRs unless otherwise noted.) Indicators for Problematic Hydric Soils' ❑ Hislosol (Ai) Sandy Rodox (55) 2cm Muck (A10) Hlstic Epipedon (A2) ❑ Stripped Matrix (S6) Red Parent Material (1"F2) ❑ Black Histic (A3) Loamy Mucky Mineral (F-1) (except MLRA 1) Other (explain in remarks) Hydrogen Sulfide (A4) ❑ Loamy Glayed Matrix (F2) ❑ ❑ Depleted Below Dark Surface (Al 1) ❑ Depleted Matrix (F3) Thick bark Surface (Al2) ❑ Radox Dark Surface (Fe) 3lndkatgrs of hydrophyGc vegetation and wetland hydrology must. © Sandy Mucky Mlneral (Si) Depleted Dark Surface (Ft) be present, unless disturbed or problematic ❑ Sandy Glayed Matrix (S4) ❑ Redax Depressions (FB) Restrictive Laver (If Present): Type: _ .. _.... Hydricsoll present? Yes No ❑ Depth (inches): Remarks: t S C� L 1;'��/f b mat .. L ov ve� "(Y'►t iC'�-�1 — an¢�+- . C+U C1 Cl+ 9 I^1,TTOW,I A Wetland Hydrology Indicators: Pdramy fndtfors (minimum of one regtrfnad check all That apply) Secondary fndfcators 12 or more required): Surface water (Al) jz Sparsely Vegetated Concave Surface (B8) Water-Stslned Leaves (BB) (MI -RA 1, 2, 4A & 4B) High Water Table (A2) 0 WaterStalnsd Leaves (except MLftA 1, 2, 4A & 4B) (BO) Drernege Patterns (Wa) Saturation (A3) Cj Seltcrust(B11) Dry -Season Water Table (C2) Water Marks (81) p .Aquatic tnvertabrates (813) Saturation Visible on Aerial Imagery (CB) ----Hydrogen"Sulfide-Odar(C1) aedlmantDaposrts(B2)-..----- GeamorphInPosltlon(D2) Drill, Deposits (B3} -Oxidized Rhrzosphares Eton@ Living Roots (C3) Shallow Aqullerd (133) Algal Mat or Crust (84) ❑ Prasence of Reduced Iron (C4) FAC-Neutral Test (D5) Iron Deposits (35) © Recent Iran Reduction In Titled Sails (CO) Raised Ant Mounds (DB) [LRR A) Surface Soli Cracks (86) ❑ Stunted or Stressed Plants (Di) (LRR A) Ftost-Heeve Hummocks Inundation Visible on Aerial Other (explain In remarks) Imagery (87) Field Observations Surface Water Present? ❑ Water Table Present? Yes Yes r�l{ No Depth On): "� No Depth Qn): Wetland Hydrology Present? Yes Ns ❑ Saturation Prasant? Yes ❑ No Depth (In): G} (includes capillary I'd nge) 1 Describe Recorded Dols (stream gauge, monitoring wall, earlal photos, previous Inspacllons), lFavallable: Remarks: Cy,G�'� ,h �-j vt'k� it �A`� ram' US Army Corps of,Enginears Waster Mounlalns, Valleys, and Coast - interim Version r I 1 1 1 1 1 1 Westem Mountains, Valleys, and Coast Supplement to the 1987 COE Wetlands Delineation Manual 1 I 1 i 1 I 1 1 I 1 i Site: A l �'!'�0 ��l `�V11 1 Sampling Dale: i_1 nt/Owner. ,�k, 01 - fU.r�tiFs3t� i r-' C� Sampling Point: ator 1 ✓ rLandfbrm City/County. Township, Range: ` State: WA (hiilslop0. ten -ace. etc) SlapsM Local relief (concave, convex, none) 5uhraglan (LRR} Lai Datu Long m n Soil Map Unit Name A- , NWI classification (� "Y Ara cllmaticlhydrolagic condidono on the site typical for this Uma of year? Yas 0 Na (If no, explain in remarks-) Ara "Norr6l. Clraumstances' present on the site? , - LLJZIJ Yes p No Are VagataUon p, soil, ©, or Hydrology l3 signIkantly disturbed? Are Vegetation Ci, Soil, C1, or Hydrology © naturally problematic? (if neaded, explain any answers In Remarks.) SUMMARY OF FIN DING5 —Attach sits map snowl ng sampling otnt locauans, vansecm, imporianETeatures, etc. Hydrophytic Vegotatlon Present? FM Yes No Is this Sampling Polrtt within a Wetland? 0 Yes LA No Hydric Soils Present? Yes � No Wetland Hydrology Present? Yes No VEGETATION - Use scientific names of plants. t Tree Stratum (Plot size �Q ) _ Absolute % Dominant Cover species? Indicator Status Dominance Test Worksheet 1. I), � � (r V (nff'> 'N (l W Number of Dominant Spades that are OBL. FACW, or FAG: (A) a. Total Number of Dominant Species Acrms All Strata: (B) �ti41.c�_f3�`:i1nlx',f1. 1t,.,/-'►rt:�}rl �Sl t U f SapfinglShrub Stratum (Plot size ) ,r = Total Cover �r Percent of Do_minent 5pedes that are OBL, FACW, or FAC: pO ( ) 1. t0'A . , Q t,0.tnnt-,t �1 Prevalence Index Worksheet T Cpygrgr Multiply b OBL. spades x 1 = 2 v- 1. 4. FACW-sppclas x 2 = S. FAG spadas x 3 = r t7 Herb Stratum (Plot siza 1` } -Total Cover FACU species x 4 = UPL species x5= Column totals (A) B Prevalence Index = B.1 A = 2, 3. 4, Hydra h c Vegetation indicators 5. V Dominance test is > 501A 81 Prevalence testis s 3.0' 7, Morphological Adaptations' 1pmvkie supporting data In remarks or on a separate shoot) g, g, Watlend Nan-Vesaular Plants ` 10- Problamatic Hydrophytic Vegatallon' (explain) t1. ' Indicators of hyddc sell and w6dend hydrology most be resent. unless disturbed or problematic t Woody Vine Stratum APlot size -Total Cover , Hydrophytic Vegetation Yes No Present? g, V =Total Cover fr % Bare Ground in Herb Stratum tLll J} r 4 1 .r Remarks- ", US Army Corps of Engineers Wesfem Mountains, Valleys, and Coast- interim Version SOIL tmmnlinn Wnlnt :\Il 1 Profile Description. Describe to the depth needed to document the Indicator or confirm the absence of Indicators. Depth Matrix Radax Features inches Texture Remarks Color moi t % Color moist % Type' Loc 100 !1"1 !r 'Type: C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covarad or Coated Sand Grains - �Lec; PL=Para Lining M=Ma41x H drtc Soil Indicators: (Applicable to all LRRs unless otherwise noted.) Indicators For Problematic Hydric Solle 1 Hiatus& (Al) Sandy RBdox (S5) 2cm Muck (A1t}) Hlstic Eplpedon (A2) ❑ Stripped Matrix (Se) Red Parent Material (TF2) Black Hislic (A3) ❑ Loamy Mucky Mineral (Fi) (except MLRA 1) ElOther (explain In remarks) Hydrogen Sulfide (A4) ❑ Loamy Gleyed Matrix (F2) ❑ ❑ DBpletsd Below Dark Surface (All) Depleted Matrix (173) ❑ Thick Dark Surface (Al2) Redox Dark Surfaoa (Fe) ' lndicstgrs of hydrophylic vagalallon and wetland hydrology must. ❑ ' Sandy Mucky Mineral (Si) Depleted Dark Surface (FT) he present:, unless disturbed or problematic Sandy Gleyed Matrix (S4) ❑ Redex Depressions (F8) Restrictive Layer Of present): - Type: Hydric soil present? Yps No Depth (Inches): Romerks: r' wvnRnl nr v Wetland Hydrology Indicators: primary lndlcetors (minimum of one requinsd: check all that apply):. Secondary fndlcatars (P ormore faquiradJ: Surface avatar (Al) Sparsely Vegetated Concave Surface (BB) Water-Stalned Leaves (Bg) (MLRA 1; 2, 4A $ 48) High Water Table (AZ) Water Stained Leaves (except MLRA 1, 2,4A �4B) (BO) Drainage Padems (810) Saturation (A3) ❑ Salt Crust (Bi 1) Dry -Season Water Table (C2) Water Marks (B1) ❑ .Aquatic Invertebrates (B13) Saturation VialblaonAerial Imagery (Cg) Sediment Deposits (B2) - -O--Hydrogen-Sufffda Odor (Cl) Geomorphic Pedilon (D2) Drift Deposits (83) Oxidized Rhfzospheres along Living Roots (C3) Shallow Aquitard (D3) ❑ Algal Mal or Crust (94) ❑ Presence of Reduced Iron (C4) FAG -Neutral Test (D5) Iron Deposits (B5) ❑ Recant Iron Reducllon in Tilted Bala (Ce) Raised Ant Mounds (DB) (LRR A). Surface Sall Cracks (Bf) Stunted or Stressed Plants (D1) (LRR A) Frost -Heave Hummocks Inundation Visible on Aerial p Other (explain In remarks) Imagery (BT) Field Observations Sllrrace Water Present? ❑ Yas Water Table Prasanl? Yes No Depth (in): rF71 No Depth (in): Wetland Hydrology Present? Yes ❑ iJo `� Saturation PrasBnt? Yes , No Depth (In): +r (includes capillary fringe) Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous Inspections), If available: Remarks: �V V VS Army Corps of Engineers Western Mounlains, Valleys, and Coast - Interim Version 1 fl 1 1 1 1 1 1 1 I 1 WETLAND DETERMINATION DATA FORM -Western Mountains, Valleys, and Coast Region ProJect/Site:Ct� {'E`^� ` {-'r ���� City+caunty / �1 Sampling Date; Applicant/Owner. v + (?,e k4v?N 1 tiG4 ^—,c D State: Sampling Point:. p 7 i 01" Investigator(s): Section, Township, Range: Landform (hllislope, teirace, {etc.): , 6� _ Local relief (concave, convex, none); C�'^�Gt�V't°� Slope (%); Subregion (LRR): r'r Lat= Long; Datum: Sail .Map Unit Narne. L1'lr► % / NWI classification_" Are climatic I hydrologic conditions on ?he site typlca( for this time at year? Yes No (If no, explain In Remarks.) Are Vegetation Soll or Hydrology signifcanlly disturbed? Are'Normal Circumstances' present? Yes _ Z No Are Vegetation Sall or Hydrology naturally problematic? (If needed, explain any answers in Remarks.) SUMMARY. OF FINDINGS -- Attach site map showing sampling point locations, transects,1mportant features, etc. Hydrophytia Vegetation Present? Yes � No Is the Sampled Area Hydric soil Present? Yes No within a Wetland? Yes No Wetland.Hydrology Present? Yes No Remarks: e4l 4 VEGETATION - Use scientific names of plants. r Tree stratum (Plot also:0 } Absolute Dominant Indicator 95 Cover Species? Status 2. - 4. r I = Total Cover sal3linalshruh Stratum (Plot size: 7-PrC. v,OL 3. ays =Total Cover Herb'"Slratum (Plot aize: S } 1. l 0-C ex s [a --�— _Y 2, — 3. 4. 5, 6: 8. g 10. i = Total Cover Waadv Vine Stratum (Plot alze: I. Hydrophytfc 2 Vegetation Present? Yes No 9 ( = Total Cover r % Bare Ground In Herb Stratum r Remarks; �j t, �3c>-fiCh2S eG � C�� a+`cr SOrr2 G Mo��cL Number of Dominant Species That Are OBL, FACW, or FAC: (A) Total Number of Dominani Species Across All Strata: L5 (B) Percent of Dominant Species That Are OBL, FACW, or FAG; ,-)0 (Ais) US Army Carps of Engineers Pravalance Index worksheatt Total % Cover of "Multiply by: OK apecias x 1 = FAMY species x2- FAC species X 3 = FACU species x 4 UPL species X.9 = Column Totals: Prevalenoe Index. = 814= x Dominar♦ce Test.ls�>6t)96 i _ Prevalence lndax1s 53.0' Morphological A6pta9one1"(provlde supporting data in Remarks or on a separate sheet} _ Wetland Non -Vascular Plants' Problematic Hydrophygc Vegatationl (Explain) 'Indicators of hydrlc sail arid•wetland hydrology must be present; unlessdistur6ed or problematic. Western Mountains. Valleys, and Coast — Interim Version : 5O1L r Sampling Point �-7%- I ar+� Profile Description: (Describe to the depth needed to document the Indlca(or or confirm the absence of Indicators.) Dep1h Mawx Redox F alums (inches)_— Cola{moist]°/oColor(moist) 46 T e yys Loa texture Bem4rks -fo 10_yF_LI oYfZ 3 t, _ _ �{ g-4y o -I r ra � a `d R 2�2� � a�,.et .� G�'► arc n a � -- ' Type. C=Concentratkm D=D letion, RM=Reduced Matrix'.CS=Covered or Coaled Sand Grains. 2Locagon: PL=Pore Emir , M=Matrix. Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.} Indicators for Problematic Hydric Soils': _ Hislosol (Al) _ Sandy Redox (S5) — 2 crn Muck (AID) Hiellc Epipedon.(A2) Slripped`Matrix (SO) r_ _,_, Red Parent Material (fF2) Black Histic (AS) _ Loerriy i)ucicy. Mineral (Fi ) (except Ml1tA 1) Other (Explain In:Remarks} _ Hydrogen Sulfide (A4) Loghr y:Gleyed Matrix (F2) Depleted Below Dark Surface (Al 1) _ Depleted Matrix (F3) , Thick Dark Surface (Al2) -_ Redox.Dark .ft6ce (F9) 3Indicalors of hydrophytic vegetallon and " _ Sandy Mucky Mineral (51) Depleted 0ark.Surface (F7) Wetland hydrology must be present, _ Sandy Gleyed Matrix (S4) Redox Depmeslons (F8) unless disturbed or prablemalim Restrictive Layer (If present): Type. Depth Onches):.. Hydric Soil Present? Yes No Remarks: L NO HYDROLOGY Wetland"Hydrology Indicators: Primary Indicators (minimum of 6�e kirlred. check".aii"that a6al4) Secondary In&y6rs (2 a"r."riipre_ _rewind) _ Surface Waler.(A,1) Water-Stalried i eaves (Bg) (exceptML,RA ^ Water tarried Leaves (B9) (ItIILRA ,_ High Water Table (A2) , 2,4A; and 48)" 4A, and "4B) _ Saturation (A3) Salt Crust"(Bi 1 j Dralnage F!Mlerns (610), Wafer it9arks (91) Aquaocc Invertebrates (IBIS)_ Dry -Season Water.Table (C2) Sediment Doposlts (1212) Hydrogeo.Sylfide..0dor (CI) _ Saturation Visible on Aerial lmaaery"(C9) Drift [Deposits (83.) _ : xkdOd Rhirnspheres along Living Roots (C3) ,—,, Geomorphic Po9ition "(D2) _ Algal Mat or Crust (84) _ ftsence of Reduced Iran (C4) _ Shallow Aqullard (d8) Iron Deposits (B5) Recent Iron Reduction In Tilled Sails (CB) ,_ FAC-Neutral Test (D5) Surface Soil Creeks (68) _ Stujnled or. Stressed Plants (01) (LRR A) _ Ralsed "Ant MoOnds (136) (LRR Ai) Inundation Visible on Aerial Imagery (B7) _ Other'(Explain in Remarks) _ Frost-HeaVa Hummorks (137) Sparsely Vegetated Concave Surface (88) Field Observations; Surface Water Present? Yas No-1— Depth (inches): Water Table Presi'rii7 Yes No Depth (Indies): Saturation Present? Yes No Depth (Inches):. i -- Weiland Hydrology Present? Yes No includes capillary hinge) Describe Recorded Data (stream gauge, monitoring wall, aerial photos, previous Inspections), if available; Remarks: Sobs A� -#-o I '-k�' US Army Corps of Englneers Western Mountains, Valleys, and Coast —Interim Version 1 1 1 I Fj 1 I J I [l d 1 1 1 1 1 1 I WETLAND DETERMINATION DATA FORM — Western Mountains, Valleys, and Coast Region r PMjectlSlw ff11 u+�l S --'n CilylCounty: i t� d `� Sampling Date: �' 1 AppticandOwner. 6tt , 0 State: Sampling Point: I"� lnvestigalor(s): Section, Township. Range: Landform (hillslope, terrace, Bic,); Local relief (conaava, convex, none): /'•Nl 64--L Slope (°%}: Subregion (LRR): // LaL Long: �} Datum: Soft Map Unit Name: % (Jr NWI classification:' 1' Are eltmakic I hydrologic conditions on tthe site typical for this time or year;' Yes � No (It no, explain in Remarks,) Are Vegetation Solt —, or Hydrology significantly disturbed? Are `Nonni Circumstances present? Yes No Are Vegetation Solt , or Hydrology naturally problematic? (If needed, explain any ansWars In Remarks,) SUMMARY OF FINDINGS — Attach site map snowing sampling porn[ locations, transems, important: TeEITUMs, etc, Hydrophytic Vegetation Present? Yes t/ No is the Sampled Area Hydric Soil Present? Yes _1/ No within a tWatland7 Yes Na Wetland Hydrology Present? Yes V No + Remarks; 6A C ram. 1 �, e. i n W;.,�Cl A nA L VEGETATON -- Use scientific names of plants. Absolute Dominant lndleator % Cover Specles7 !talus Tree Stratum (Plot size: 1.- S rw K r -t6 r! rJ 1 �7NtI 2: Po a i5 4. =Total Cover S,Rpling1Shrub Straium. (Plot aim� S 7 2: owL'� u SUS f0�r.e rno .� N FALtJ 3. q c =Total Couer Herb'-Slratyrr {Plotsizs.• �� ) 4. — 5. — e. 7. — 8. — — 10. — 11: 77— — =Total Cover Woody Vtne Straturp (Plot size: ] Dominance Test worksheat: Number of Dominant Species That Are DBL. FACVJ, or FAC: '� (A) Total Number of Dominant Species Across A11 Sliata: (B) Percent of Dominant Species ' a That Are OBL, FACW, orFAC: . Total %.Coyer'ofi . MbItIyIy by: 06Lspecdes x1,_ FACW 9peptes - x.2 = FAC species; x 3. FACU species• x'4 UPI: spedes x 5 = Column Totals:. (A) Prevalence Index. = BlA = �f Dominance TeaLts'?50% Proverencs Index Is 53.0` Morphologlcal Adaptations' (Provide supporting data fn Remarks or on a separate sheet) _ Wetland Non-Vascurar.Plants' _ Problematic Hy lrophytic Vegetation' (Expiain) 'Indicators of hydric soil and wetland hydfoiogy must be present, unress disturbed or problematic. 1 _ f Q y ';:A(, I! Hydrophytrc 2 w b,, s 10.c i c�ir��nS _ 2— N Vegetation Present? Yes / No = Total Cover °Yo Bare Ground in Herb SUalum �q � e� zqiGV--, G"-cl tiV1 US Army Corps of Erlgineers Weslem Mountains, Valleys, and Coast — Interim Verslun 1 SOIL Sampling PoinL• Profits Description: (Describe to the depth needed to document the indicator or confirm the abaance of indicators,) Depth MattIX Redox FaaIWLoo (inches) Colorrfmoistl % Color (moist) % 7vae t.oc Teuiure - _Remarks_ _ tt/-a 'T e: C=Concenimilon, D=De teflon,.RM=Reduced Matrix CZ --Covered or Coated Sand Grains. 2Loration: PL=laote Lfntn , M=MatrbL Hydric Soil Indicators: (Applicable to ali LRFts, unless otherwise noted.) indicators for Problematic Hydric Soils Histosol (Al) Sandy Radox (55) 2 cm Muck WO)— — Htstic Eplpedon (A2) &Irlpped Matrix (SS) _ Red Parent Materiat ff2) . Stack Hlstic (A3) _ Loamy Mucky. Mineral (Fi) (except MLRA 1) � Other(ExplainIn:Remarks) _ Hydrogen Sulfide (AA) :Luny Gley.sd Matra (F2) _ Depleted Below'Dark'Surfece (Ai1) Depleted MaK� (FS) _ 7hlck Dark Surface (Al2) ^ Reodk aark,5urfaca (FB) alndicatom of hydrophyt)c vegetation and J Sandy Mucky Mlneral.(S1) _ Depleted Dsrk Surface (F7) Wattand hydrology snust-ae. present, Sandy Gleyed Matrix (54) Redox Depmsstons (FS) unless disturbed or problematic, Restrictive Layer (If present), Type: / Depth (inches): Hydric Sol] Present? Yes V No Remarks: HYDROLOGY Watland.Nydrology Indicators: Indicatnra mintmum.ofone mgulred, check. sll atapply) Secandery indicators l2-ar.morareaufrai[) Surface Water (Al) ��High Water-Stahied Leaves (139) (except MLRA _ Waler�tair3ed Leaves (H!3). ML:RA I' i Water Table (A2) 1, 2 4A;-arid 4B) 4A, and 4S} _✓ Saturation (A3) Salt -Pr usl (Bji) _ Drainage Patterns (61D) — Water Marks (Si) _;Agudlc I' ertt:brates (B13) Dry -Season Water.Tatile (C2) Sediment Deposits (B2) _Hydrogen. Sulfide Odor (C9) _ SaturationUs)6lebn 44al,Imagery (49) _ Drift Deposits (83) ..,Qxidized Rhizospheres along Living Roots (C3) _ Geomorphic Posltior (D2) Algal Mat or Crust (84) Ptasence of Reduced Iron (C4) Shallow Aquitard (03) _ Iron Deposits (B5) Rbeehiirah Reduction to -Filled Soils (CB) _ FAC-Neutral Test(D5) Surface Soil Cracks (96) _ Stunted or Stressed Plants (W) (LRR A) , Raised Ant Mounds (08) (LRR .A) Inundation Visible an Aerial Imagery (137) _. Other (Explain In Remarks) _ Frost -Heave Hummocks (DF) Sparsaly,Vagatated Cohoave.Siirface (85) Field Observations: Surface Water Present? :Yes.' No. Depth: (]riches); WatarTabie Present? Yes ✓ No Depth (Inches): t I i! Saturation Present? Yes. r% No beplh (Inches): 41 / Watiand Hydrology Present?. - Yea,- �/ No (Includes capillary frl e Describe Recorded Data (stream gauge, monitoring wall, aerial photos, previous inspections), if available: Remarks: i.J�l-e.� •c,�h-e�-cam -�4u. �i-i- ?cnx�'���'t��-i t� ' . �aC�.-%-u��e.�L C�-� '�I �' b�.� �Z4� Su('-�a�L•�,� J 1( .Y t'� Gi�4 j I e\ LAI VT 1 4 " ) V\X �} OJ— p L V 1 , OS Army Corps of Englne�rs Western Mountains, Valleys, lend Coast — Interim Version I 1 1 1 1 WETLAND DETERMINATION DATA 1=ORM -Western Mountains, Valleys, and Coast Region Project/Slta: ��" ~�'� l^t GilylCvunty: --N Sampling Dole: 6/ :9 69 Applicant)Owner. IC-1 r-7, f X--� Slate: W P! Sampling Point; -?,q --t r- Investlgator(s)_ Ism ! � Section. Township, Range'. Landform (hlllslope, terrace,,etc,): Local relief (concave, convex, none); Slope Subregion (LRR): A- Let: Long; Datum, Soil Map Unit Name: NWI classification: Are climatic! hydrologic conditions on trhe site typical for this time of year? Yes Na (if no, explain In Remarks,) Are Vegetation ,.Soil or Hydrology significantly disturbed? Are'Normal Circumstances' present? Yes No Are Vegetation Soil or Hydrology naturally problematic? (If needed, explain any answers in Remarks.) SUMMARY OF FINDINGS -- Attach site map showing sampling point locations, transects„important reatures, etc. Hydrophylfd Vegetation Present? Yes V No Is the Sampled Area Hyddc Soli Present? Yes l% No - • within a Wetland? Yes,L- No Wetland Hydrology Freaerrt? Yes ✓ No ReiT<adcs: o 6 011 41 N Ind � A (+ 47 W"((A rJ VEGETATION -- Use scientific names of plants. Tree Stratum {Plot alze- ] % Cover Species? Status _ FAL 2. _a.lw b�9sGrv:,r 25_ gr, C. 4. Ion =Total Cover SapltnalShrub_Stratum- (Plot sizes �._VLZ= ,, —10 _ _ FACf 2.,ilrq�oG�F 3 _ ! Z =Total Cover Herb' -Stratum (Plot size, ) 2. col sli chw, -. rn u., nkv-. _ I P , _ i=A CQ 3. s: B. 9. 90. 11. .. - [o Total Cover Woody, Vine Stratum (Plot size: 1 j; Rir�1ILi cG.rMP.!'1�G.1C.1.ti.S � �_ �l�J 2: I �=TatatCover Bare Ground In Herb Stratum �i "-3 US Army Corps of Erlgineers Number of Dornlnant.Speeies That Ate OBL, FACIN; ;oi FAC•:� (A) Total Number of Dominant Species Across A315trats: (B) Percent of Dominen! Speoea That Are OBL, FAGW,=ot FAC: (A!B) Pn3vaience Indexworkshesf: Total %.CaveroP Mullh3N by: ObL species x t = FACW species x 2 = FAG species. x 3 - FACU species x 4 - UK ape Cleo x S = Column Totals: (A) (B) Prevalence Index = B1A C Dominance Test ls360% _ Prevalence Index IsS3.0' Morphologicaj Adaptations' (Provide supporting data in Remarks or, on a saparale sheel) _ Weiland Non -Vascular Plants` Problematic Hydrophylic Vegetation' (Explain) 'Indicators of hydricsoil sod wetland hydrology must be preseni unless disturbed-orproblematic, Hydrophytic Vegetation Present? Yes No Western Mountains. Valleys, and Coast - Interim Version le' SOIL Sampling Paint Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of Indicators.) Depth Matrix Redax Features (inches) Coiar(moisi) % Color fmoisl)_ 9i, -. TypalLoc` Texture _ _ _ Remarks____ O—l4 I -IQ JI ICO 'S:l Ism T f 4g,5 KF-1I cin 3/4 �� L -- Sl I4 or" 'Type.- C=Concenlratlon D=De Iellon, RM=Reduced Matrix CS --Covered or Coaled Send Grains. =Looatlom PL-Pore Uning, MmMattix, Hydrlc Soil Indicators: (Applicable to all LRRs, gnlass"otharwise noted.) Indicators for PnWemallc Hydric Sails': — Hlstosol (Al) — Sandy Redox (SS) _ 2 cm Muck (Al0) Histic Epipedon (A2) — Stripped Maldx-M) _ Red Parent Material (TF2). Black Histic (A31 _ Loamy Mucky. Mineral (Fi) (except MLRA 1) _ Other (Explain In.Remarlcsj _ Hydrogen Sulfide (A4j _ Loemy Gleyrid Matriic (F2) _ Depleted Below Dark Surface {A111 ___. Diipleled Matrix (F3) 1 Thick Hark Surface (Al2) _..- Redog,Dark Surface (Fa) 'Indicators of hydraphyticvegelatlon and _ Sandy Mucky Minaral.(81) _,_ Deplete_ d Dark. -Surface (t=7) welland hydrolpgy must-be,praserit, _ Sandy Gloyed Matrix (S4) _ Red" Depressions (F8) unless disturbed or problematic. Restrictive Layer (If present); Depth (inches,); Hydric Soil Present? Yea Nv. Remarks: HYDROLOGY watland Hydrology. Indicators: Primary Indicator lminlmum of one 6giuired: check�all thataoolul S conch indicators" 2:or.rrinre-rd wired surface Water A7) ( Water-5lainad Leaves {BB) (excgpt.MlJtA ' a:i . Watar,Statned Leaves (88� (MLRA `i, 2, High Water Table (A2). 1,124A, and 4B) A. 4A and 4B) aturellon {A3) _ Drainage. Piallems (B10} _ Water Marks (Bi) Aquatic Invertebrates (313) _ Dry -Season Water.Tahle {C2} Sediment Deposits (02) _ Hydrogen Sullyde Nor (Ci) _ Saturation Visible on We[ Imagery (G9) _ Drift Deposits (B3) Oxidized Rhltospheres along Living Roots (C3) _ Geomprphic Pnsition (D2) Algal Mat or Crust (B4) .— Pfesence of Reduced Iron (C4) _ Shallow Aqultard (D3) Iron Deposits (85) !_ Recent Iron Reduction In Tilled Soils iW _ FAC-Neutral Test (05) Surface Sol! Cracks (BB) , Slunted or Stressed Plants (Di) (LRR A) _ Ralsed Ant (hounds (06) (LRR A) Inundation Vislble on Aerial Imagery (137) —. Other (Explaln In Remarks) ` Frost -Heave Hummocks (D7) _ Sparsely Vepetaled Concave Surface (13B) Field Observations: Surface Water Present? Yes No. V/ Depth (inches): Water Table Present? Yss No Depth (Inches): Saturation Present? Yes Na Depth (Inches): Welland Hydrology Present? Yes No includes ca IIIa fringe) Describe Recorded Data (stream gauge, moniloring well, aerial photos, previous Inapectione), If available: Remarks: US Army Corps of Engineers Weslem Mountains, Valleys, and Coast --Interim Version I 1 1 I 1 I 1 1 WETLAND DETERMINATION DATA FORM —Western Mountains, Valleys, and Coast Region �-y Project/site. 1ZA� h �/`� 4'`� Cliylcounty, �n (`�+ Sampling Date, 5 Y "-," I Applicant/Owner. (A" cr� State: LOA Sampling Point F i Investigalor(s): _ '7 i _ Sectlon, Township. Range: Landform (hillslope, Wrace, etc.): Local relief (concave, conve(, none): slope m" Subregion (LRR): , Lat; Long: Datum: Soil Map Unit Name; f NWI classification: Are climatic / hydrologic conditions on the site typical for this ilme of year? Yes V No (If no, explain in Remarka,) Are Vegetation Sol! or Hydrology significantly disturbed? Are 'Normal Circumstances' present? Yes V11 No Are Vegetation Soil or Hydrology naturally problematic? (if needed, explain any answers in Remarks.) SUMMARY. OF FINDINGS — Attach site map showing sampling point locations, transects, important features, etc. HydropFiyk Vegetation Present? Yes—zi No Is tha 5amp[ad Area Hydric Soil Present? Yes No ''/, vrlthfn a Wetland? Yes _ No Wetland Hydrology Present? Yes No - Remarks: VEGETATION! Use scientific names of plants. i Absolute Cover Dominant Indicator Species? Status Dominance Test wotltsheat: Tree Stratum (Plot size: 1. 17 <li R. � ► �� +n�� v r. S Number of Dominant Species 1- That Are ORL, FAG`; or FAC; ___�/___ __ _ (A) 2. ti '7i r`` Total Number of 1)om1nent 3. _ A Species Across. All Strata: _7 _ _____, (S) 9aolinpl5hru rate size: ) p Total Cover Percent of Dominant Species r] That Are COL, FACW;-or IFAc; ! (Ale) (Plot o ry"—k a..- 1.0 y � Prevalence. lridex.works ia0 TotaI%CoyeraP MultiGlyliy: / 2,-�li�y�t� y{yF��1�� Z] 19i' �N .3, �c ri�kulf,5t� _ T t' 1G� OBLapedas x7.= FACW.spectes_ .- x 2 = 4. `v.. '1� 01 rro, C A ARC, _ I � � 1� f1d)titl/ FACspecies. x3= FACU species x4= =TotatCove{ lierb'Siratum (Plotsizr ) uPLspecfes 1. Column Totels' . = (A). (B) 3, Prevalence Index. =81A = Hydrophytic.Vegetation Indicators: Dominance Test.Is>60% Prevalence Index -is s3.0' Morphologleal Adaplatlons' (Provide supporting 4• 5, 6: 7' data In Remarks or an.wseparale sheet) Watland Non Vascular.Plants` _ Problematic Hydrophylic Vegetation' (Explain) 10. 'Indicators of hydrlc soil and wetland hydrology must be present, unless disturbed or problematic. Woody Vine Stratum (Plot Size: Total Cover 1. 1-Vv'� ,5 rU � IA vi T: ' D Gib Hydrophyft _''' Vegetation r 2 � Present? Yes Y No = Total Cover % Bare Ground In Herb Stratum US Army Corps of Erlgineers Western Mountains, Valleys, and Coast - Interim Version SOIL Sampling Point r — f 62 Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of Indicators,) Depth Malrlx _ __ Redox Features (inches) Color moast °h Color (rnolst) % Tyoe _ Loci Texture Remarks jr Li V=� At ►asp �� 5 c1r��C^9 'T e: C=Concenlratlon D=De laGon .RMI ReducedVatdx CS -Covered or Coated Sand Grains. Location: PL=Pore Linin , M=Matrix, Hydrle WI indicators: (Applicable to all-LRRs, gnless otherwise noted.) indicators for Problematic Hydric Solls : — Histosol (Al) Sandy:Redax (S5) _ 2 cm Muck (A9.0) Hislic Epipedon.(A2) _ Stripped;Metdx (SO) _ _ Red'Parent Material (TF2) . Black Histic.(A3) _ Loamy Mucky. Mineral (F1)_ (except MLRA 7 } Other (Explefn.fn:Reiinarks) — Hydrogen Sulfide (A4) r Loemy Gleyed lifiaUnc (F2) _ Depleted Below Dark .,Surface'(A11) _ Qe0Eetecl Maldir (173). ,_,_, Thick Dark Suriace (Al2) _ Redok Dark=Surface (PS) 31ndicalors of hydrophyticvegetation and — Sandy Mucky Mineral.(61) ` Deplutad.GarkSurface (F7) wetland hydrology must be present, Sandy Gleyed Matrix (S4) Redbx Depressions (FS) unless disturbed or prahlematic, Restrictive Layer (If present): Type. % Depth (Inches): Hydric Sail Present? Yes No rf Remarks: HYDROLOGY Wetland -Hydrology Indicators - Primary Indicators mi T um of one re ulred• check.alt.thal applyl Secondary indlcalors 0ai•. more reculredl Surface Water (All Water-8lalned Leaves_ (89) (except MLRA — Water-Stahied Lasvea. (88) (I11LRA4, 2; _ High Water Table (A2). 1, 2, 4A; and 4B) 4A, and.413) _ Saturation (A3) ;Salt Cnfst (1311.1 _ Dralnage P,atlems (El10). _.Water Marks (B1) _-,Aquatic Invertebrates (B13) _ _ Qry-5easar► Water.7able (C2) _ Sediment Deposits (B2) _..Hydrogen.Suillide .Odor (C1) — Saturation lrris(ble on Aerial.Imagery. (C9) _ Drift Deposlls (133) ,Qxldized Rh(zospheres along Living Roots (C3) _ Geom4rphlo Posltior<(D2) Algal Mat or Crust W) . Presence of Reduced Iron (C4) _ Shallow Aquitard (D3) Iron Deposits (B5) Recent Iron Reduction In Tilled Solis (CB) — FAC-hieutral Tast.(D5) Surface Sall Cracks (88) ` Stunted or.Stressed Plants (D1) (LRR A) _ Raised Ant Mounda (D6) (LRR A) Inundation Visible on Aerial Imagery (B7) ,_ 'Other (Explain In Remarks) _ Frost-Weava.F{ummocks (177) _ Sparsely Vegetated Cancave:Surface,(88) Field Observations: Surface Water Present? Yas Na. V ..peplh.(Inches): Water Present? Yes No ^ Depth Table (Incites): Saturation Present? Yes Nn--L/ L?eplh (Inches): Welland Hydrology Present? Yea No } (Includes ca illa Td e Describe Recorded Data (stream gauge., moriitoring.well, aetial pholos, previous inspecElons), it aveliable: Remarks: �` r p x,�/i�i.��.�1'� ✓ I l�'`, (n.. 1�"� Cr��, a1., 1 - �'4���,,, r"i , L�f� r Lis Army Corps of Engineers Western Mounlains, Valleys, and Coast — Interim Verslan 1 11 a u 1 1 I I u 1 WETLAND DETERMINATION DATA FORM Western Mountains, Valleys, and Coast Region Project./Site: "I-, Sampling Date: 5 " '" 0 i( tiJ ApplicanllQwner. State: Sampling Point 1J� Investigator(s) Section, Township, Range: Landform (hilislope, terrace. etc.): Piz � �!_ Local relief (concave, convex, none): fin Slope M Subregion (LRR): 4f 1 Litt: Long: Dalum:� Soil Map Unit Name: � 6�. � NWI ctassitication: � Are climatic 1 hydrologic conditions on Ve site typical for this time of year? Yes Na (if no. explain In Remarks.) Are Vegetation . Sol! , or Hydrology significantly disturbed? Are *Normal Circumstances" present? Yes No Are Vegetation . Soli , or Hydrology naturally problematic? (11 needed, explain any answers in Remarks.) SUMMARY OF FINDINGS — Attach site map showing sampling point locations, transacts, Important features, etc. Hydrophylic Vegetation present? Hydric Soil Present? Yes t/Ho Yes = Is the Sampled Area No— within a Wetland? Yes No "— Welland Hydrology Present? Yes __V_1 No Remarks - VEGETATION - Use scientific names of plants. Tree S(rptum y (Plot size: Alt/ t`- ) � �-, � V►� L °+ er -SPW 9 status pecies 1. 1t n 3 % ( Thai Are OBL, FACWsor FAG: (A) z. A� i�.tn.4 vim, �— i _ ?clot Number of Dominant ""7 Species Across All Strata: !! (8} Total Cover Percent of Dominant Species -� That Are OBL, FACW, or FAC: (AM) SaalingfShrub Stratum (Plot size: ) 1 Prevalence Index workshaal: 1. � r_X 2. _Y `�] C r- 4u'1-� Ca "rYi . (� Y �.� 1.4+{Vr _ rAL Total % Cover of: Multiply by: 3. �n � tnJ.�-- �rC S t �-I-y VIA- LS _ �, OBL species x 1 - 4. MI Li �Lnt, i ]� -._ %_d Oti'i^]L'� _ X f 14 FACWspeaes x 2 = ti. .--- FAC species x 3 = FACU species x 4 } = Total Cover Herb Stratum � r` i (Flat size:. „-_} U UPL species x 5 = t. i'.tit w Ltv r�\_Y. c.t 1 (ZAl Column Totals- (A) (8) 2- Prevalence Index = B/A = 3, 4, Hydraphytic Vegetation Indicators: 5. Dominance Testis 75i?95 g, Prevalence Index is nA' Morphological Adaptations' (Provide supporting 7. _ _. _._ 8. Data In Remarks or on a separate sheet) Weltand Nan -Vascular Plants' ` 1 E1, H dro h — Prablemalic y p ylis V egeleiaan' (Explain) 'Indicators of hydric soil and wetland hydrology must t 1. be present, unless disturbed or prohlemalic = Total Cotner Woody 1,_ Vine Stratum (Plot size: I Af�i i- Hydrophytic Vegetation Present? Yes X No 2. 4 0 �� = Total Cover / °h 6ere Ground in Herb 5lretum US Army Corps of Engineers Waslem Mountains, Valleys, and Coast -- Inlerim Version 1 SOIL Samnlrno Point: Prof#1a 1)escriplion: {Describe to the depth needed to documan#She indicator or confirm the absence of indicators.) Depth Matrix {InrJies�_ Color (mpist°% Redox Features Color (moist) °h Type Loc Texture Remarks _ 'T e: C=Concentration. D=De letion, RM=Reduced Matrix. CS=Covered or Coated Sand Grams. 'Location; PL=Pore Llnin , TA=Matn'x�r� Hydric Soil Indicators; (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Sotls3: _ Hlstosal (Al) — Sandy Redox (85) _ 2 un Muck (AID) — Histi-_ Eplpedon (A2) _ Stripped Matrix (SG) _ Red Parent Material (TF2) _ Black Histic (A3) Loamy Mucky Mineral (F1) (except MLRA 1) Other (Explain In Remarks) _ Hydrogen Sulfide (A4) T Loamy Gleyed Matrix (F2) _ Depleted Below Dark Surface (A11) Depleted Matrix (F3) _ Thick Dark Surface (Al2) _ Redox Dark Surface (Fri) 'Indicators of hydrophytic vegetation and _ Sandy Mucky Mineral ($I) r Depleted Dark Surface (F7) wetland hydrology must be present, _ Sandy Gleyed Matrix (S4) Redox Depressions (F8) unless disturbed or problematic. Restricllvo Layer (11 present): Type: Depth (inches): Hydric Boll Present? Yes No Remarks: L y 4 e ms— a tit 1 f er r- 1.� HYDROLOGY Wetland Hydrology Indicators: Primane indicators minimum of one required; check all that ORDIVI Sec n 8N Indicators f2 or more required) Surface Water (Al) _(1 Water -Stained Leaves (139) (except MLRA i Water-Sla9ned Leaves (89) (MLRA 1, 2, High Water Table (A2) 1, 2, 4A, and 4S) 4A, and 4B) _ Saturation {A3) _ Salt Crust (a11 ) XDrainage Patterns (810) Water Marks (131) Aquatic Invertebrates (B13) ` Dry -Season Water Table (C2) Sediment Deposits (82) _ Hydrogen Sulfide Odor (Cl) _ Saturation Visible on Aerial Imagery (C9) _ Drift Deposits (83) _ Oxidized Rhizospherez along LMng Roots (03) _ Geomorphlc Position (02) _ Algal Mat or Crust (84) Presence of Reduced iron (C4) ShalloW Aquilard (D3) Iron Deposits (135) _ Recent Iron Reduction In Tilled Soils (CS) ` FAC-Neutral Test (05) Surface Sol! Cracks (66) _ Stunted or Stressed Plants (Dt) (LRR A) _ Raised Ant Mounds (136) (LRR A) Inundation Visible on Aerial Imagery (67) _ Other (Explain In Remarks) , Frost -Heave Hummocks (D7) _ Sparsely Vegetated Concave Surface (BB) Field Observallons: Surface Water Present? Yes No Depth (Inches): .1c Water Table Present? Yes _ No Depth (Inches):, Saturation Present? Yes _ . J No Depth (inches): Wolland Hydrology Present? Yes No Includes ca Ille fringe) Describe Recorded Data (stream gauge, monitoring well, aerial pholos, previous inspections). If available: Remarks: US Army Corps of Engineers Western Mountalris, Valleys, and Coast — Interim Version I 1 1 1 1 1 1 1 1 1 f 1 1 1 1 l WETLAND DETERMINATION DATA FORM —Western Mountains, Valleys, and Coast .Region pmJecUSlle:—S,• fit^ LLrf'f SI -n"T -v - Cilylcounty: Nb't- c 1/0LLCM Jh.-IV! samplingDate: Applicant/Owner, 1Ie . y—tt's" �.'-62 --.. —Slate: I. If� SamplingPolnt: Investigator(s): - action, Township, lunge: i +� Local relief {concave, convex, none): GESr �U r�_y Pr Slo a %r Landform (hillslope, terrace, Subregion (LRR): Lat Long: Datum; sou Map Unit flame: 1 t fh � t�! NWI classification: Are climatic 1 hydrologic conditions on 6 site typical far this time of year? Yes 6,"No (1t no, explain in Remarks.) / Are Vegeiadon Soil or Hydrology significantly disturbed? Are'Nonnial Circumstances: present? Yes V No Are Vegetation: ,.Soil or Hydrology. . naturally problematic? (if needed, explain any answers In Remarks.) SUMMARY OF FINDINGS — Attach site map showing sampling (point locations, transects, important features, etc. Hydrephytic Vagelagon Present? Yes— No is the Sampled Area Hydric Soll Pfesent7 Yes No X "hln a Wetland? Yes iVo,� Wetland Hydrology Present? Yes No —)L— .remarks: kA O rti � V G1ETAfION -- Use scientific name s.of plants. ruav4u4c 4WlOUPIII 11+.+,eW+ Tree Stratum {Plot slxe: 30 ) Cover Soecie57 §18tus 2.. PStME _-.— 30 . �4 by a. Pta t3� 10_ JFA a. U4/c =Total Cover SaollnalShrub Stratum- (Plot size 4 ] 2: f►ar C(C 3..—�n�.� It7 F� J a. ' 1� = Total Cover ' r u� {Plat lira: fAL rn '2. AT A D� _ — 1 Nny's - 3. 4. 5. e: 7_ 8- 9. 1t3. 11. 1.04 != Total Cover Woody Vme Straigm (Plot size: 1 'l- t 2. ` Bare Ground In Herb Stratum US Army Corps of Engineers NumberofDominant Species � That Are DBL, FACW; or. FAC; V (A) Talal Number of 0orrdnant Species Across AllSirsta: Pereant of Dominant Species That Are OBL, FAC(N,'or-FAC: (AiB) 10ta196.Cover'at . Mullinlyby: Ok apecies x 1 = 10 FACW speclea 'i d X2. (n D FAC species % 3 =- 1 '- BO .., ..: FACU species e x 4 =. UPL species x 5 = Column Tolals: (A) S �nS (13) Prevalence Index. = B!A = Hydrophydc Vegetation indicators: _ Dominance Test ls'>54% _ Prevalence Index-1 a Q.0' _ Morphological Adaptations'. (Provide supporting data in.Remarlts cr. aIn a separate Sheet) _ Welland Non -Vascular -Plants' _ Probteinatic Hydrophyuc Vegelatloh' (Explain) 'Indicators of hydrlcsoll Arid vretland hydrology must be present;. unless disiurhed-orproblematle. Hydrophytic Vegetation Present? Yes' No ? Total Cover Western Mountains, Valleys, and Coast— Interim Version SOIL Sampling Point E Profile Do5criptlon: {Describe to the depth needed to document the indicator or confirm the absence of Indicators.) Depth Matrix— F?edox Features (inches)__ Color(molstl _°�6 Color (moist) % Type_ Lac Texture Remarks -911 toy R 1lz M 'Type' C=Concentraiian 1041a fetion, RM=Reduced Matrix CS-Coverad or Coated Sand Grains, 'Location; PL=Pore LInIn , M=Matrix. Hydric Sot[ Indicators: (Applicable to all LRRs, unless otherwise noted.) Indleators for Problematic Hydric Soils', _ Hislosol (Al) — Sandy Redox (SS) _ 2 cm Muck (Al I)) Hisllc l pipedop (AZ) _,_, Slrlpped;Matrlx (SB) — Red Parent Melerial (TF2). Black Histic (A3) _ Loamy Mucky. Mineral (Fi) (except MLRA 1 ) Other (Exple[n In Re.marks' ) _ Hydrogen Sulride (A4) Loamy Gteyed Matrix (172) _ Depleted Below Dark Surface (Al1) _ Depleted Matrix (F3) Thick Dark Surface (Al2) _ Redo>t,Dark Surface (Fs) �Ind[calors of hydrophytto vegetation and J Sandy Mucky Mineral (Si) Depleted Dark Surface (F7) Wetland hydrology must be present, Sandy Gleyed Matrx (5.1) _ Radox laepressions (FB) unless disturbed or problematic,. Restrictive Layer (if present): Type: Depth (inches): Hydric Soil Present? Yes No. Remarks: pig ir1L S�ii 1 Sri L�t-#r HYDROLOGY Wetland Hydrology Indicaters:. Primary Indicators (mintmum.of tine renulred, cfieck-.all that enclyl Secondary Indicators (2-ou more raau€red] _ Surface 1fVater.(A l) Water-Slainbd Leaves (BA) {sxoept.MLRA Waler-Stained Leaves (B9 (MI_RA 1, 2, lilgh Water Table (A2.) 1, 2, 4A,-and 43) AA, and,4B) _ Saturation (An) _ :Salt Cnlst (811.) _ Drainage P,stlems Water Marks (111) AquatI 1hVedakmtes (813) � Dry-Seasort Water Table {C2) Sediment Deposits (K) _ 140rogen.Sulfide Odor (C1) _ Saturatlon l $$Ie,on.Aerial imagery (C9) _ Dflft.depaslts (an) _ Pxldixed Rhizospheres along I.iving Roots (C3) _ Geomorphic Position (D2) Algal Mat or Crust (84) _ Rasence of Reduced Iran (C4) _ Shallow kqultard (03) Iran Deposits (B5) Recent Iron Reduction In Tilled Salls (CB) _ FAC-Neutral Test (05) Surface Soil Cracks t136) _ Stunted or Stressed Plants (D1) (LRR A) _ Raised Ant Mounds (DB) (LRR A) _ Inundation Visible on Aerial Imagery (87) _. Other (Explain In Remarks) _ Frost -Heave Hummorks (D7) SparselyVegetaled Concave Surface (138) Field Observations - Surface Water Present? Yes . No. Depth (Inches); Water Table Present? Yes No Depth {Inches); Saturation Presents Yes pia Depth (Inches): Wetland Hydrology Present? Yes No_�' Includes capillary fdn e describe Recorded Data (stream gauge, monitoring weft, aerial photos, previous Inapectfons), if availaWa: Rramerks: u41aVJ A t'ti L j mow` T� US Army Corps of Engineers Western Mountains, Valleys, and Coast — Interim Version I I 1 WETLAND DETERMINATION DATA FORM — Western Mountains, Valieys, and Coast Region 9 Pro)ecusile: h iZ �'�j^Y { CltylCounty: t`-'� 1 Sampling Date. x — `� + Imo. _,..,. .. II ` Applicant/Owner: i� _P� �_,�_ Sc iL-C �- l „ � +Ca Slate: i � "� Sampling Point: D 1 2-2 Invesligatorys)_ J 1 Section. Iownship, Range: Landform (hlllslope, terrace. etc.): etc.): �tr bYl Loral relief (concave, convex, none): C / �: Slope Subregion (LRR): P _ _. Lai: Long: Dalum� Soil Map Unit Name: ] _ NWI tlassifirakon: Are climatic 1 hydrologic conditions on the sale typical for this time of year? Yes No (If no, explain in Remarks.) Are Vegetation . Soll or Hydrology significantly disturbed? Are "Normal Circumstances' present? Yes No Are Vegetation Soil or Hydrology naturally problematic? (If needed, explain any answers in Remarks.) SUMMARY OF FINDINGS — Attach site map showing sampling point locations, transects, important features, etc. Hydrophylic Vegetation Present? Hydric Yes Na �7 Is the Sampled Area Soil Present? Welland Hydrology Present? Yes Na Yes Y_L/_ No within a Welland? Yes i� No Remarks- 'T VEGETATION -- Use scientific names of plants. f��} Absolute Dominant indicator Tree Stratum (Plot size: ►G^ Statu 2. _ t�� 4. = Total Cover Sapling/ShrubSiralurn. (Plot size: ) 2.. _Zn YJA s nY c-, bZl 4. Yj! = Total Cover Herb Stratum (Plot site: 'J l 1. 3 w. Dominenea Test workshaeV. Number of Dominant Speaea That Are OBL. FACW, or FAC: (A) Total Number or Dominant Species Across All Strata: (B) Percent of Dominant Species r� That Are CSL, FACW, or FAC: (9 ! (Al8) Total % Cover al: Mutliply by: CBL species x 1 r FACW speces x 2 a FAG species x 3 = FACU spacies x 4 = UPL species x 5 = Column Totals: (A) _ (B) Prevalence Index = B/A = 4. Hphytic Vegetation Indicators: 5. Dominance Test is >50% B. _ Prevalence Index is s3.0' 7. _ Morphological Adaptations` (Provide supporting B. data In Remarks or on a separate sheet) Wetland Non -Vascular Plants' S. _ 10. Problemalic Hydrophylic Vegetation' (Explain) 'Indicators of hydric soil and wetland hydrology must be present, unless disturbed or problematic. 11. i Q = Total Cover Woody Vine Stratum (Plot size; ? } 1. Q LIia LA C . _ Ln t * f1� t_ A 111 c17 - ta/ / (�� Hydrophylic 2. !1 1 cru �1,n .. 4,,. , , . E ; -_'� �i M-�` L.,_......,..... <� g n Present? Yes V No - US US Army Corps of Engineers Western Mountains, Valleys. and Coast - Interim Version I SOIL S9mnlinn PninF 1_P k Profire (Describe to the depth needed to document the Indicator or confirm the absence of Indicators.) Depth Ma rix Redox Fea u es (inches) Color moist % Color (moist) T e -,).._ 5 �. vn - Loc_ _ 0-H Tarnure Remarks -LED W w-1 1 Y. V'aa cap v !D 0 rO4 J 'T _ CoConcenlration. D=De lelion. RIA=Reduced Matrix. CS --Covered or Coated Sarni Grains. 'Location: PL=Pore Lining- M=Matrix, Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise nated.) Indicators for Problematic Hydric Sails : _ Histosol (Ai) ` Sandy Redax (S5) — 2 cm Muck (At 0) — Histic Epipadon (A2) _ Stripped Matrix (S6) _ Red Parent Material (TF2) _ Black Hlstic (A3) -XIoamy Mucky Mineral (F1) (except MLRA 1) XOther (Explain in Remarks) _ Hydrogen Sulfide (A4) _ Loamy Gleyed Matrix (F2) _ Depleted Below Dark Surface (Al 1) _ Depleted Matrix (F3) _ Thick Darn Surface (Al2) _ Redox Dark Surface (Fri) 'Indicators of hydrophytic vegetation and Sandy Mucky Mineral (Si) _ Depleted Dark Surface (F7) wetland hydrology must be present, Sandy Gieyed Matrix (S4) _ Redox Depressions (FS) unless dlsiurbed or problematic. Resbicliva Layer (If pmsent): Type: Depth (inches): . T Hydric Soil Present? Yes No 0YG(6iVlrl �-b{1 �M-L ].GJQ t N YUKOLOUY Wetland Hydrology Indicators: Primary indicators firninimurn or one re aired' check all that aRp[vl Secondary Indicalors (2 or more required) _ Surface Water (At) High Water Table (A2) _ Water -Stained Leaves (89) (except MLRA Water -Stained Leaves (B9) (MLRA 1, 2, Saturation (AS) 1, 2, 4A, and 48) Salt Crust 4A, and 48) — (511) ---_ Drainage Patterns (B10) _ Water Marls {Bi} ` Aquatic Inverlebrales (813) — Dry -Season Water Table (C2) _ Sediment Deposlls (82) _ Hydrogen Sulfide Odor (CI) — Saturation Visible on Aerial Imagery (CO) Drift Deposits (83) _ Oxidized Rhixospheres along Living Foots (C3) — Geomorphic Position (02) _— Algal Mat or Crust (EI4) presence of Reduced Iron (C4) -___ Shallow Aquitard (D3) _ Iron Deposits (B5) Recent iron Reduction In Tilled Soils (CS) FAC-Neulral Test (135) _ Surface Soil Cracks (B5) _ Stunted or Stressed Plants (D1) (LRR A) _ Raised Ant Mounds (D6) (LRR A) _ Inundation Visible on Aerial imagery (87) _ Other (Explain in Remarks) T Frost-Heeve Hummocks (D7) _ Sparsely Vegetated Concave Surface (815) Field Observations: Surface Water Present? Yes No,'_'( Depth (inches): Water Table Present? Yes No Depth (inches): 12, Saturation Present? Yes --& too Depth (inches): _--_'7� Welland Hydrology Present? Yes No Includes ea ills fringe Describe Recorded Data (st(eam gauge, monitoring well, aerial photos, previous inspections), If available: Remarks: US Army Corps of fnglneers Westam Mountains, Valleys, and Coast - Interim Version I 1 I 1 1 WETLAND DETERMINATION DATA FORM -Western jMouuntains, Valleys, and Coast Region f ProjesilSite it � ��Y✓ �'l__ T�1 11� _ CilylCcunty, __n Sampting Date; 4 � �ff J .! n ApplicanilOwner:..t'� � �7-r" i�� -n, '�4h ! ,��,� �,.` �t? State: VAry Sampling Point: � � rYrtr Invesligator(s): 71" Sac ion.'Township. Range; Landlorm (tiilislope. terrace. etc): local relief (concave. convex, none): Slope (°5): ti Subregion () t: .. _ Long. Dalum: Sail Map Unit Name: - NWI classifwation; Are climatic 1 hydrologic conditions on the site typical for this time of year? Yes V' No (It no, explain in Remarks.) Are Vegetation Sol] or Hydrology significantly disturbed? Are'Normal Circumstances' present? Yes-4- No Are Vegetation Soil or Hydrology naturally problematic? (It needed, explain any answers in Remarks.) SUMMARY OF FINDINGS -• Attach site map showing sampling paint locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes " _ No, Hydric Soil Present? Yes No "' Is the Sampled Area V,. 1A'ettand Hydrology Present? Yes No within a Weiland? Yes No Remarks: �� � � 1 S �`� C.n..�Gy.t 'Cit� L7� Vim/ V F C�•l-7 "1 '"�• C.7" VEGETATION -- Use scientific names of plants. ';' t r7 l f d 0� Absolute Dominant Indicator Jos r {Plot size: i 1. c � .kin C i-) 4-1 ��+ r,�.l ` w1A % Cover 5oeGi s7 t E . 2. � ' f4 f :If - 4 i .Irv.,-r `al., ;r-) i 4. 1 J =Total Cover � SaelinorShrub Stratum (Plot size: �L ) � 7 2. U 3. 4 4. �!� Total Cover Halt5lralurn (Plot size: ) I._ 2. lri 3_ 4. 6. 5. r, 8. 10, 11, l �_= Total Cover Woodv lrne_Stratum {Plat size: � � ) 1. P., , l," , c k"'Y A'- < 1 � � �' 1 - � 2. ,1 A \QlitC A.ln C r % Bare Ground In Herb Stratum _10 _jL_=Tatar Cover Number of Dominant Species That Are OBL, FACW, or FAO: (A) Total Number of Dominant SpecresAcross All Strata: "�(B) Percent of Dominant Species Thal Are OBL, FACW, or PAC: _ (AIS) Total % C v f: Multiply by: OBL species x 1 - FACW species x 2 = FAC species x 3 = FACIJ species x 4 = UPL species x 5 = Column Totals: (A) (l3) Prevalence Index = B/A = Hydrophytic Vegetation Indicator: Dominance Test Is >50% Prevalence Index is s3.0' Morphologicat Adaptatlons' (Provide supporting data In Remarks or on a separate sheel) Wetland Nan Vascular Plents' _T Problematic Hydrophylic Vegetation' (Explain) 'indicatms of hydric sell and welland hydrology must be present, unless disturbed or problematic. Hydmplyylle Vegetation Present? Yes l` Na US Army Corps of Engineers Western Mountains, Valleys, and Coast- Interim Version I I SOIL Smmnlinn Pnmt Prnflle Description: (Describe to the depth needed to document the Indlcator or confirm the absence or indicators.) Depth M t Px Redox Features (inchesl Cofer moist __ % Color imolsil _ % _TYne Loc Texture Remark 'Type: C;Concenlrarron, D=De letion. RM=Reduced Matrix. CS=Covered or Coated Band Grains. 'Location_ PL=Pore Lining, M=Matrix. Hydric Soli Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Probtemalic Hydric Soils : _ Histosol (Al) __._ Sandy Redox (S5) _ 2 cm Muck (Al D) Histic Epipedan (A2) _ Stripped Matrix (56) — Red Parent Material (72) _ Black Hislic (A3) _ Loamy Mucky Mineral (171) (except MLRA 1) — Other (Explain in Remarks) _ Hydrogen Sulfide (A4) — Loamy Gleyed Matrix (172) T Depleted Below Dark Surface (A11) _,_ Depleted Matrix (F3) _ Thick Dark Surface (Al2) _ Redox Dark Surface (F8) 'Indicators of hydrophytic vegetation and — Sandy Mucky Mineral (S1 I _ Depleted Dark Surface (i=7) Welland hydrology must be present, _ Sandy Gleyed Matrix (S4) Redox Deprasstons (F8) unless dislurbed or problematic Restrictive Layer (If present): Type: Depth (inches), Hydric Sall Present? Yes Na')� Remarks: r tiYUKULDGY Wetland Hydrology Indicators: P t aIndicators (minimLim of one re uire& check all that apply) Secondary Indicators Q or mare reauifed f _ Surface WBler (Al) — Water -Stained Leaves (Bg) (except MLRA Water -Stained Leaves (Bg) (MLRA 1, 2, — High Water Table (A2) 1, 2, 4A, and 415) 4A, and 4R) _ Saturation (A3) _ Salt Crust (Bt 1) _ Drainage Patterns (81 Q) _ Water Marks (BI) — Aquatic Invertebrates (813) _ Dry -Season Water Table (C2) _ Sediment Deposits (82) _,,,, Hydrogen Sulfide Odor (C1) Saturation Vielble on Aerial Imagery (C9) _ Drift Deposits (e3) _ Oxidized Rhizospheres along Living Roots (C3) Geomorphic Position (132) _ Algal Mat ar Crust (B4) — Presence of Reduced iron (CA) _ Shallow Aquitard (W) _ Iron Deposils (B5) — Recent Iron Reduction In Tilled Soils (C6) FAC-Neulral Test (05) ___., Surface Soil Cracks (BO) — Stunted or Stressed Plants (D1) (LRR A) _ Ralsed Ant Mounds (061 (LRR A) Inundation Vislble on Aerial Imagery (67) __.. Other (Explain in Remarks) _ Frost -Heave Hummocks (D7) — Sparsely Vegetated Concave Surface (BB) Field Observations: Surface Water Present? Yes No-y— Depth (inches): Water Table Present? Yes No Depth (inches): Saturation Piesenl? Yes — No �_ Depth (inches), l Wetland Hydrology Present? Yes No X includes cWtiary fringe) Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if avallable: Remarks: 1J` cAlk c' r'-G l -i1,' ,'tf Lam' 1�� %ot. i U�5 �5 f I 1 1 I 1 US Army Corps of Engineers Western Mountains, Valleys, and Coasi - Interim Version I East Rentem Lift Slation - Werla+rd, Strewn and Wildlifi, Sned.v APPENDIX E: STEWART CREEK FISH USE MEMO ESA Appendix E Juh'2011 5309 ShilsholeAvenue NW cn -! Suite 200 Seattle, WA 98107 206.789.9658 F_'I cnr- 206.769.9664 ;_°:< I memorandum Idate May 2, 2011 to David Christensen (City of Renton) Lara Kammereck (Carollo Engineers) from Steve Krueger (ESA) Ann Root (ESA) subject East Renton Lift Station Elimination Project; Determination of Fish Presence/Absence in Stewart Creek The City of Renton (City) is currently proposing to install a sanitary sewer pipeline through Maplewood Park, which is owned by King County (County), and decommission an existing City owned pump station immediately north of Maplewood Park (Park). Since the project is being proposed within properties owned by King County, the City will be required to meet King County permitting requirements. Stewart Creek Creek a small tributary stream to the Cedar River, originates in a stormwater and (Creek), D'P immediately north of Maplewood Park and west of the pump station. The Creek flows through an open channel within Maplewood Park before passing beneath a residential area south of Maplewood Park. The segment of the Creek south of the Park is piped beneath residential areas and streets before discharging to a steep ravine where it flows relatively unconfined to its confluence with the Cedar River. The City initially proposed two options for constructing the pipeline beneath Stewart Creek within Maplewood Park —an open cut excavation option and an option to bore the pipe beneath the stream channel_ In order for the County to allow open cut excavation through the stream channel, the City was required to 1) provide evidence that either the stream goes dry during the summer, which would allow for work to occur in the dry, or 2) the City would have to detennine whether or not salmonids were present in the stream. Based on site observations, it was determined that the portion of Stewart Creek that flows within the Park contains year round flow. Therefore, the City would have to determine whether or not salmonids were present in the stream. At this juncture, the City and engineering consultant (Carollo) looked to Environmental Science Associates (ESA) to investigate whether or not salmonids were present in Stewart Creek A preliminary review of the Washington State Department of Fish and Wildlife (WDFW) interactive SalmonScape mapping tool indicated that no anadromous salmonids were present within the stream. However, this tool does not indicate whether or not resident coastal cutthroat trout are present. ESA suggested that they obtain a Scientific Collection Permit (SCP) from WDFW to allow for the stream to be electrofished to verify fish presence or absence. Upon receipt of the SCP ESA contacted Larry Fisher, a local area habitat biologist with WDFW to set P p � Y � g , up a site visit prior to perforrning any electrofishing. ESA fisheries biologist Steven Krueger and wetland scientist Sara Noland, City staff, and a Carollo engineer met with Larry Fisher on -site on March 23, 2011. Based on existing site conditions and follow on review of site plans, Mr. Fisher indicated that electrotishing would not be necessary and instead suggested making visual observations and installing baited minnow traps to assess fish use of Stewart Creek within Maplewood Park ESA fish biologist Steve Krueger installed two baited minnow traps on March 29, 2011, one located upstream near the proposed crossing and one located at the downstream end of Maplewood Park. Mr. Krueger also performed visual observations by walking the entire stream length within the Park using polarized glasses on the same day. Mr. Krueger returned to the site on March 31, 2011 to inspect and remove the traps and perform additional observations of the stream by walking the entire length again. Upon inspection of the traps, no fish were observed. One small salamander and two aquatic invertebrates were collected and released unharmed. No fish, particularly salmonids, were observed during visual observations conducted along the entire stream length within Maplewood Park. It is assumed that the downstream piped segment in conjunction with steep grades through the ravine may prevent salmonid access to the project area. The results of the field investigation were forwarded to Larry Fisher on March 31, 2011. Larry replied on April 1, 2011 that WDFW would allow for open cut excavation through the channel provided that the streambed and vegetation disturbed during construction would be restored. F, 1 1 lk IL �` �' � .icy• �>r�� � ,. •q� AP �.•;'r�"G. dh //�. �1 if / ♦ � ' �i��>c - W's", rs .x J i OWP► 4+;ri[ :. t of �}.k� ~.. - �' a da J 1 1 j 1 I 1 1 1 East Rentem Litt Station Miti.�,ution Pleat CONTENTS fgl> l►rIR-63 llotoW i 2.0 PROJECT SITE.............................................................................................................................1 2.1 WETLANDS........................................................................................................................................... 1 2.2 STREAMS.............................................................................................................................................. 2 2.3 BUFFER CONDITIONS............................................................................................................................ 2 3.0 PROJECT DESCRIPTION..........................................................................................................3 3.1 PuRPOSE..........................._._._..........................3 3.2 CONSTRUCTION.................................................................................................................................... 3 3.2.1 New Pipeline .........................................................................................................................3 3.2.2 Construction Equipment and Acces,s..................................................................................... 5 3.2.3 Best Management Practices...................................................................................................5 3,2.4 Schedule................................................................................................................................ 5 3.3 OPERATION AND MAIN I'ENANCE.......................................................................................................... 6 4.0 IMPACTS .......................................................................................................................................6 4.1 STREAM DEWATERING......................................................................................................................... 6 4.2 TF.MPORARI' EQUIPMENT CROSSING AND PIPELINE: TRFNC'HINCi ACROSS STREAM--. ........................ 6 4.3 PIPE INSTALLATION IN BUFFER AREAS................................................................................................. 7 4.4 TRF:r REM()VAL....................................................................................................................................8 5.0 MITIGATION PLAN....................................................................................................................8 5.1 AVOIDANCE. AND MINIMI%ATION.......................................................................................................... 8 5.2 STREAM RESTORATION......................................................................................................................... 8 5.2J Str-eambanks..........................................................................................................................8 5.2.2 Stream Channel (Bed) ...........................................................................................................8 5.3 BUFFER RESTORATION AND TRF.F: RF.PLACFSMENT................................................................................ 8 6.0 GOALS, OBJECTIVES, AND PERFORMANCE STANDARDS............................................9 7.0 MONITORING AND MAINTENANCE...................................................................................13 7.1 PRE-CONSTRUCTION...........................................................................................................................13 7.2 POST-CONSTPUCTION AND BEFORE PLANT INSTALLATION................................................................ 13 7.3 AS-RUILT INNPFiCTION......................................................................................................................... 13 7.4 PERFORMANCE MONITORING............................................................................................................. 13 7.5 MO NITORING RF:P()RTS....................................................................................................................... 14 7.0 MAINTENANCE AND CORRECTIVE ACTION......................................................................................... 15 8.0 CONTINGENCY PLAN..............................................................................................................16 9.0 LIMITATIONS............................................................................................................................16 10.0 REFERENCES.............................................................................................................................16 FIGURES...................................................................................................................................................17 APPENDIX A: PLAN SHEETS.............................................................................................................A-1 ESA page i IJtol-v 2011 Ea.sl Renlon Lift Stalion Mitigation Plan LIST OF TABLES Table 1. Vegetation Success Criteria — Upland Buffer and Stewart Creek Riparian Area .......... I 1 Table 2. Monitoring Program .................... LIST OF FIGURES Figure 1 — Vicinity Map Figure 2 — Streams, Wetlands and Buffers Figure 3 — Site Plan page ii ESA Jah, 2011 East Renton Li11 SYali(m Mitigation Plan 1.0 INTRODUCTION At the request of Carollo Engineers and the City of Renton Public Works Department, ESA prepared this stream and buffer mitigation plan for the East Renton Lift Station Elimination project located in King County and Renton, Washington. The project is to install a new sewer pipe through Maplewood Park to convey wastewater via gravity flow to an existing sewer main located south of the park. An existing pump station north of the park would be removed. ESA delineated streams and wetlands and prepared a critical area report for the project site in spring 2009. That report has since been updated to reflect current regulatory requirements. Detailed descriptions of site conditions including the onsite stream and wetlands are provided in the East Renton Lift Station Wetland, Stream, and Wildlife StudY (ESA, 2011). 1 I 1 1 1 This mitigation plan has been prepared in accordance with King County Code (KCC) requirements and guidelines for mitigating impacts to streams and buffer areas (King County, 2007). This plan is also intended to meet state and federal requirements for mitigating impacts to streams. The plan summarizes site conditions, describes the proposed project, explains project impacts, and describes stream restoration activities. A proposed maintenance and monitoring program and a contingency plan for the mitigation area are also included. 2.0 PROJECT SITE The project site is located on a plateau on the north side of the Cedar River valley, within Water Resource Inventory Area (WRIA 8) — CedarlSammamish River- drainage. The project site includes an existing sewer lift station north of Maplewood Park in the city of Renton, and a proposed new sewer pipeline running south of the lift station through the park, which is in unincorporated King County (Figure 1). The northern boundary of the park forms the city -county boundary. The existing lift station is located on a fenced gravel pad at the end of a gravel access road extending from SE Second Court. The park contains young, mixed conifer -deciduous forest crossed by unpaved foot trails. There is evidence of other past disturbance including an old concrete building foundation. Numerous underground and overhead utilities are present along the proposed pipeline corridor alignment. A stream (Stewart Creek) flows through the study area from north to south. Several wetlands are associated with the stream, as discussed below. 2.1 Wetlands ESA identified seven wetlands on the project site, designated as Wetlands A through G (Figure 2) (ESA, 2011). ESA rated the wetlands using the Washington Slate Welland Rating System jbr Western Washinglon (Hruby, 2004). Each of the wetlands received a rating of Category 11 and requires a buffer of 140 feet under King County Code (KCC) 21A.24.325.A.1. No wetlands are located north of the park in the city of Renton's jurisdiction. ESA page] ' July' 2011 East Roden Lift Station Mitigation Plan 2.2 Streams ESA also delineated two streams on the site (Figure 2). Stewart Creek flows from north to south through the project site. A small unnamed tributary joins Stewart Creek north of Wetland G. Neither stream supports fish (ESA, 2011 Stewart Creek enters the northern end of the study area via a plastic culvert. The Stewart Creek stream channel averages approximately five feet wide, with portions of the channel in the northern part of the park up to 10 feet in width. Stewart Creek exits the south end of the park via a grated concrete culvert. The stream is piped for approximately 0.3 mile south of Maplewood Park, then enters an open channel and flows another 0.45 mile before joining the Cedar River. The tributary to Stewart Creek is three feet wide with a gravel bottom and appears to have formed as a result of overbank flows from the main stream. The riparian area along both Stewart Creek and the tributary consists of native forest and wetlands. Both streams meet the King County criteria for Type N streams with a buffer of 65 feet (KCC 21 A.24.358). Stewart Creek begins south of the park boundary and both streams are in King County jurisdiction. 2.3 Buffer Conditions The portion of the stream and wetland buffers extending into City of Renton jurisdiction (Figure 2) consists mostly of gravel -surfaced access road and the existing fenced and graveled pump station area. Limited vegetation consisting largely of shrubs and red alder saplings is present around two detention ponds north of the access road and pump station. Within Maplewood Park in King County jurisdiction, the stream and wetland buffers (Figure 2) consist of native, mixed conifer and deciduous forest, and cleared areas dominated by invasive vegetation. Native forest vegetation dominates most of the site, with invasive species present mainly at the north and south site boundaries and along foot trails. Within the native forest, dominant trees include red alder, black cottonwood, Douglas fir, western hemlock, and western red cedar. The forest community is fairly young, although some of the Douglas fir trees are older based on their large size. Understory species include salal, snowberry, salmonberry, Oregon grape, and sword fern. Portions of the forest are open and parklike, while a dense Understory is present in other areas. Unpaved foot trails parallel the stream and branch off into the rest of the park. The invasive herbaceous species herb Robert is present along the foot trails. The southern portion of the buffers within Maplewood Park has been disturbed by past clearing and grading. Soils in this area are compacted, and the vegetation is dominated by non-native invasive species such as Himalayan blackberry and Scot's broom, as well as native trailing blackberry. Immediately south of Maplewood Park, the buffer area consists of residential development and 148th Place SE (Figure 2). l 1 1 I 11 1 1 1 Paget ESA July 2011 ' 1 Lust Rerrturr Lifi Station .Mitigation Plan 3.0 PROJECT DESCRIPTION 3.1 Purpose The East Renton Lift Station, operated by the City of Renton, is just under 10 years old. It is located north of Maplewood Park near the end of the NE 2nd Court cul-de-sac (Figure 2). The lift station serves to pump sewage from nearby residential neighborhoods (Maplewood Estates, Parkside Court, Shy Creek, Liberty Ridge, and others for a service area of approximately 430 acres) to the gravity sewer system located near N.E. 4th Street. The City of Renton prefers to serve customers via a gravity sewer pipeline, rather than a lift station whenever feasible. A gravity system eliminates electricity costs for pumping and equipment maintenance, which greatly reduces annual Operation and Maintenance (O&M) costs. Based on topographic survey data, conversion to a gravity system is possible at this location by crossing through an undeveloped portion of Maplewood Park and connecting to the Briar Hills Division No. 4 sewer system to the South. Conversion to a gravity sewer system involves installation of a new sewer pipeline crossing Maplewood Park, and removal of the existing lift station north of the park. 3.2 Construction ESA net with City of Renton, King County, and Washington Department of Fish and Wildlife (WDFW) representatives in the spring of 2011 to discuss the project and permitting requirements. The main point of discussion was whether a trenched crossing of the onsite stream (Stewart Creek) would be permitted. ESA determined that Stewart Creek does not support fish (ESA, 2011). Based on these findings, WDFW indicated that a trenched crossing of the stream would be allowed (Fisher pers. comrn., 2011). This is consistent with direction given by King County at the January 25, 2011 pre -application meeting. The project has therefore been designed with a trenched stream crossing. 3.2.1 New Pipeline The new pipeline will consist of approximately 1,030 linear feet of 12-inch-diameter and 15-inch-diameter pipe (Figure 3). The new pipe will be installed using open trenches. Trench excavations ranging from 3 to 10 feet deep would be required to maintain the desired gradient along the alignment. 1n addition, the existing lift station structure will be demolished. The following general sequence of construction activities is anticipated for pipe installation. 1. Survey and mark construction limits. 2. Install temporary erosion and sediment control (TESC) measures in 148th Place SE. u ESA page 3 ' JulY 2011 East Renton Lift Station Mit ,ation Plan 3. Remove existing 8-inch-diameter gravity sewer and existing 48-inch- diameter manhole, and install 15-inch-diameter gravity sewer and new 60-inch-diameter manhole in 148"' Place SE. 4. Confirm operation of new 15-inch-diameter gravity sewer by television inspection, air test and inspection of manholes with channeling. 5. Relocate fencing to provide equipment access at East Renton Lift Station. 6. Clear and grub 30-foot-wide corridor and install remaining TESC measures for installation of the gravity pipelines. 7. Temporarily divert stream flow (Stewart Creek) by bypass pumping and install temporary stream crossing. 8. Install 15-inch-diameter gravity sewer in Maplewood Park. 9, Install 12-inch-diameter gravity sewer between existing manholes in existing gravel access area north of the park. 10. Confirm operation of new 15-inch and 12-inch-diameter gravity sewer by television inspection and air test. 11. Install temporary wastewater bypass pumping systems and test. 12. Perform improvements to existing manholes north of the park and fill existing 12-inch-diameter gravity sewer. 13. Inspect manhole channeling. 14. Decommission bypass pumping systems and commence gravity sewer operation. 15. Remove temporary stream crossing, and revegetate work areas within the park. 16. Decommission and demolish existing lift station facilities. 17. Construct miscellaneous site improvements at East Renton Lift Station site. 18. Perform asphalt overlay in 148th Place SE. Page 4 ESA JOY 2011 C 1 1 1 1 I 1 1 1 I I 1 F(ov Renton Lift Station litigation flan 3.2.2 Construction Equipment and Access The City anticipates using the following equipment to construct the project: backhoe, trackhoe, bulldozer, dump truck, concrete truck, and 5 to 10 HP submersible pumps. Construction equipment and materials will be staged on the existing gravel access road north of the park and on the roadway surface of 148th Place SE south of the park, at least 30 feet away from streams and wetlands (Figure 3). Construction equipment and workers will access the work area from the gravel access road and from 148"' Place SE. A temporary crossing consisting of quarry spall (riprap) will be installed to allow equipment to cross Stewart Creek (Figure 3). 3.2.3 Best Management Practices Clearing of vegetation within the pipeline corridor, trenching to install the pipe, and other construction activities will disturb soils and could cause minor, temporary erosion and sedimentation. Increased erosion and sedimentation could result in a short-term increase in turbidity in the onsite stream or wetlands. As with any construction project, there is potential for water quality contamination due to accidental spills of hydraulic fluid or other materials. The following erosion control measures and construction best management practices (BMPs) would be used to avoid and minimize these temporary impacts: • As part of the project's Temporary Erosion and Sediment Control (TESL) plan, install silt fence along the construction corridor to protect nearby wetlands from sedimentation (see Sheet C-02, Appendix A). • Temporarily bypass the onsite stream prior to trenching the pipe across the stream or installing the temporary stream crossing for equipment. • Place straw, mulch, or commercially available erosion control blankets in areas that require additional protection. • Revegetate disturbed area,, as soon as possible after completion of construction. • Maintain construction equipment in good working order, free of leaks of fuel, hydraulic fluids, or other chemicals. • Keep fueling and equipment maintenance areas within designated staging areas and away from streams and wetlands. • In the unlikely event that a construction accident or spill releases contaminants into waterways or the surrounding. environment, BMPs (such as oil booms and adsorbent pillows) would be employed and utilized to contain and minimize the spill. • Route all water from trench dewatering to the existing sanitary sewer system in accordance with permit requirements. 3.2.4 Schedule The City intends to construct the project in the summer/fall of 2012. Construction is anticipated to last approximately four months. ESA page July 2011 East Renton Lift Statim Mitigalioli Plon 3.3 Operation and Maintenance The new pipeline will be located underground, with manholes for maintenance access (c.g., cleaning the pipe). No other operation or maintenance activities are anticipated following project construction. 4.0 IMPACTS This section describes proposed impacts to streams and strea"wetland buffers during project construction. No wetland impacts would occur. Tree removal in the buffer is also discussed. Section 5 provides a mitigation plan for these impacts. 4.1 Stream Dewateri ng Stewart Creek will be temporarily diverted to protect water- quality and aquatic life during in - stream work. For this project, in -stream work will include installation of a temporary equipment crossing, and trenching of the new sewer pipe across the stream. To divert streamflows, cofferdams will be placed in the stream channel, both upstream and downstream of the work area, encompassing the locations of both the temporary equipment crossing and the adjacent pipeline trench (see Sheet C-08, Appendix A). Streamflow will be pumped from above the upstream cofferdam into a temporary flexible pipe. Flows will be discharged from the flexible pipe back to the stream, at a location downstream of the lower cofferdam. The temporary equipment crossing will then be constructed while the streamflow is being diverted by the pump. A culvert will be installed through the temporary equipment crossing, extending from the upper cofferdam, through the culvert, to a point downstream of the lower cofferdam (see Sheet C-07, Appendix A). Once the culvert is in place, flows will be diverted through the culvert and the pump will be removed. The temporary equipment crossing and culvert will remain in place throughout the construction period. This will serve to isolate the work area from stream#lows and minimize sedimentation in the stream. The quantities of streamflow to be diverted around the work area are unknown. However, the City intends to construct the project during the dry season, during low flows. Stewart Creek does not support fish, based on ESA observations (ESA, 2011). 4.2 Temporary Equipment Crossing and Pipeline Trenching across Stream A temporary crossing of Stewart Creek will be installed to allow equipment access from both ends of the work area (north and south). The temporary equipment crossing will be located within the 30-foot-wide construction corridor, adjacent to the new pipeline crossing of the stream, to minimize disturbance of the streambed and banks (see Sheet C-07, Appendix A). The temporary crossing will consist of riprap placed in the stream channel for equipment to drive on. A culvert placed under the riprap will carry streamflow through the work area until construction is complete, as discussed above. The new sewer pipeline would be installed across Stewart Creek using a trenched crossing immediately south of the temporary equipment crossing (see Sheet C-07, Appendix A). In 1 1 1 I 1 1 'J I 1 1 Page G ESA JulY 2011 ' 1 1 1 I I F] 1 Eav Renter Lift Station Miti,oalio+l Phin general, the pipeline trench will be 4 feet wide but could be up to 10 feet wide depending on the side slopes needed at the top of the trench. The pipe would have a minimum 5 feet depth of cover at the stream crossing (scc Sheet C-05, Appendix A). For purposes of mitigation planning, it is assumed the entire 30-foot width of the construction corridor would be temporarily disturbed at the stream crossing. The equipment crossing and pipe trench will be located where an existing foot trail crosses Stewart Creek. The existing trail crossing is 8 to 10 feet wide and devoid of vegetation. The project would require the removal of some native riparian vegetation beyond the existing foot trail width, resulting in a minor and temporary loss of wildlife habitat and shading for the stream. The stream channel of Stewart Creek at the crossing location is 5 to 15 feet wide (see Sheet C-07, Appendix A). Approximately 437 square feet of the streambed would be temporarily disturbed by the equipment crossing and pipeline trench. This part of the stream would not be available for use by aquatic species such as benthic macroin vertebrates for the duration of construction (up to four months). Aquatic species would be able to move through the construction area via the temporary culvert. Following construction and pipeline installation, the temporary crossing will be removed, and the strearnbed and banks will be restored and revegetated as described in Section 5. 4.3 Pipe Installation in Buffer Areas Construction of the new sewer pipeline will require clearing a corridor 30 feet wide and approximately 760 feet long through Maplewood Park. The pipeline trench within the corridor will be up to 10 feet wide and 3 to 10 feet deep. The remaining width of the 30-foot corridor would be used for equipment access and stockpiling of materials. Construction will affect 21,948 square feet (0.5 acre) of strearn buffer and wetland buffer within Maplewood Park (Figure 3). Impacts within the park will include clearing of native vegetation, soil disturbance to excavate the trench for the pipeline, and soil compaction by construction equipment. Buffer areas outside of the park that would be affected by the project are currently paved or gravel -surfaced. Approximately two-thirds of the affected buffer area within the park (the northern portion) currently consists of native forest vegetation. The southern one-third of the construction corridor in the park, south of Wetland C, is dominated by non-native invasive vegetation (e.g., Himalayan blackberry). Of the 21,948 square feet of buffer impact in the park, 2,736 square feet is currently occupied by foot trails and will be restored to foot trails following construction. Approximately 915 square feet at the north and south ends of the construction corridor within the park is currently unvegetated or grassy and will be reseeded following construction. Removal of native vegetation will reduce the buffer's function in providing wildlife habitat and screening from human disturbance. When construction is complete, the construction corridor will be revegetated as described in Section 5. ESA page 7 h1Y 201I East Rewan Lit Station Miti,,,utim Plan 4.4 Tree Removal Construction of the new pipeline will require the removal of 31 trees, mostly large Douglas -fir with some big -leaf maple and red alder (see Sheet C-03, Appendix A). Trees will be replaced at a 3:1 ratio along the construction corridor as described in Section 5. 5.0 MITIGATION PLAN This section first describes mitigation sequencing measures the City has followed to avoid and minimize impacts to critical areas. It then describes proposed measures to restore Stewart Creek and stream/wetland buffer areas temporarily affected by construction. Drawing sheets referenced in this section are provided in Appendix A. 5.1 Avoidance and Minimization King County, the City of Renton, the Corps, and Ecology require that impacts to critical areas must be avoided and minimized to the extent possible. The location of the proposed project is constrained by the need to make connections to the existing sewer main. The proposed pipeline alignment was selected to avoid impacts to wetlands and to follow an existing utility corridor and foot trails to the extent possible. Avoiding impacts to buffer areas by located the pipeline farther to the east or west would have required a longer pipeline traversing a larger area of native forest, resulting in greater impacts to trees and wildlife habitat. 5.2 Stream Restoration 5.2.1 Streambanks Following construction, the quarry spalls and culvert placed in Stewart Creek for the temporary equipment crossing will be removed. The streambanks will be stabilized with coir logs and coir blankets, and then planted with native shrub live stakes (Sheets L-01 and L-02). A foot path 8 to 10 feet wide surfaced with wood chips will be maintained on both sides of the stream, similar to existing conditions. 5.2.2 Stream Channel (Bed) Following installation of the new pipeline across the stream, the trench will be backfilled with a minimum five feet depth of cover over the pipe. The trench backfill material and cut-off walls in the trench are designed to prevent surface flows in the stream channel from dispersing into the trench (Sheet C-08). Cobbles will be added over the trench to restore a natural stream substrate. 5.3 Buffer Restoration and Tree Replacement The 30-foot-wide construction corridor within Maplewood Park will be revegetated when the project is complete. Ten feet of this corridor width will be replanted with native tree species. King County requires trees removed for the project to be replaced at a 3.1 ratio (Casey pers. comm.). A total of 103 trees will be planted along the construction corridor to replace the 31 trees removed, slightly exceeding the County's requirements (Sheet L-01). I 1 F, 1 1 1 1 Page 8 ESA .July 2011 , I L'av Renton Lift Stalimi MiriQalion Plan 1 remaining 2 feet of the corridor width will be replanted with native shrubs-, trees will not be The reanCun � 0 ee p , planted in this area to avoid tree root damage to the sewer pipe. Tree and shrub species to be installed will be upland species that are dominant in this part of Maplewood Park. A foot path 8 to 10 feet wide, similar to the existing path, will be maintained and surfaced with wood chips 1 11 I 1 (Sheet L-01). Streambanks that are disturbed by construction will be replanted with live stakes (Sheet L-02). The pipeline trench in buffer areas will be backfilled with pipe bedding material to meet engineering requirements. A layer of topsoil and organic compost approximately 18 inches deep will be placed over the gravel to provide a substrate for plant establishment (Sheet L-02). Woodchip mulch will be placed around the base of each tree and shrub to suppress weeds and retain moisture. In areas between the woody plantings (not treated with woodchip mulch), an herbaceous seed mix will be applied to prevent erosion of bare soil and reduce infestation by non-native invasive plant species. Restoration plantings will be installed during the rainy season (typically October I — March 1). This will allow time for plant roots to become established prior to summer drought conditions. The landscape contractor will be responsible for irrigation of the plantings to ensure plant survival for one year following installation. Watering will likely he accomplished via a water truck. Outside of Maplewood Park, the pipe would be installed in existing paved or gravel -surfaced areas. These areas do not provide buffer functions to onsite streams or wetland~. These affected areas will be restored to pre -construction conditions. 6.0 GOALS, OBJECTIVES, AND PERFORMANCE STANDARDS This section provides goals, objectives, and performance standards for the restoration project. The goal is to restore Stewart Creek and buffer areas temporarily impacted by construction of the East Renton Lift Station Elimination project. This is assumed to occur through achievement of the following objectives: • Revegetate approximately 18,467 square feet of upland buffer in the construction corridor with a native vegetation community similar to that existing in adjacent areas of Maplewood Park, while allowing for continued use of a foot path through the park; Revegetate areas of the streambank along Stewart Creek that are affected by the temporary equipment crossing to a native tree/shrub riparian community, while allowing for continued use of a foot path across the stream; and ESA Page JulY 2011 1 East Renton lift Station Mitigation Plan • Ensure the stability of the streambed and banks where the pipeline crosses Stewart Creek. The restoration areas will be monitored for success for a minimum of three years following complete installation per King County requirements (Casey, pers. comm.). Specific performance standards and success criteria have been developed to determine whether the restoration plan has met these goals and objectives. The restoration plan will be deemed successful if the following performance standards and success criteria have been met. Buffer and Riparian Vegetation To determine if vegetative diversity, vegetation cover, and habitat complexity are developing, the success criteria shown in Table 1 apply to the buffer and riparian restoration areas. Pipeline Crossing Stability To determine whether the pipeline crossing of Stewart Creek is stable, the following standards will apply: • No evidence of streambank erosion or settling of the streambed over the pipeline crossing. • Coir logs and blanket installed on streambanks remain in place. • Gravel, cobbles, or other natural substrate will be present in the streambed over the pipeline trench. [J 1 1 n 1 Page 10 ESA Jule 2011 J 1 1 3 = 0 i s CIO Q 7:j 3 Q cGi ° 00 n p rn >1 y _ t-. s R CL b_n IM f1 O O b otz p" G C hi r bA .G v 3 a o O o a o 0 0 \ ci Q -a7) r i V `� U— a U Q.. V `e O U � vti � o c ° y 03 0 1 Eav Renton Lift Station Mili�atiot Plan 7.0 MONITORING AND MAINTENANCE This section describes the City's proposed monitoring and maintenance of the restoration areas. Three years of monitoring and maintenance will be the responsibility of the City of Renton. The activities described in this section will be coordinated with King County Parks, which owns Maplewood Park. A professional biologist or landscape architect will perform all monitoring. 7.1 Pre -Construction Monitoring of the restoration areas will begin prior to construction of the pipeline project. At this time, the City will meet with the construction contractor to define and clearly mark the limits of work and TESL measures. King County typically inspects the site at this stage, prior to the start of construction. 7.2 Post -Construction and Before Plant installation After the pipeline is installed, the temporary stream crossing and TESL measures will be removed. At this time, the project biologist or landscape architect will meet with the landscape contractor to discuss site preparation prior to installation of plantings. Should any plant species substitutions be necessary, the project biologist and contractor will discuss and document these for approval by King County. The biologist will also inspect the plant material and assist with placement of plant species in the field. King County may wish to inspect the site again at this stage, prior to installation of plants. 7.3 As -built Inspection After the plants are installed in the restoration areas, the landscape contractor will provide an as - built or record drawing. The project biologist or landscape architect will visit the site with the King County representative to ensure the plants have been installed properly, mulch and seed have been applied, and there are no other issues that need to be addressed. The biologist will verify the as -built conditions, inspect the plants, recommend replacement if necessary, and establish sample plots and photo point locations. Permanent plots for monitoring will be selected to represent the planting areas. The appropriate number and location of plots will be determined on site during the as -built site inspection. Permanent photo points will be located to provide a representative visual documentation of Site progress. The photo points and sample plots will be shown on the as -built drawing. Monitoring of the restoration areas will begin upon King County acceptance of the as -built or record drawing, and will continue for three years. 7.4 Performance Monitoring The site will be monitored according to the schedule and methods shown in Table 2. During each year of the monitoring period, the site will be monitored in the spring for the presence of non-native invasive vegetation. This will allow time for maintenance of the site if needed to remove weeds during the early growing season before seed set. A second site visit in the late ESA page 13 Jule 2011 East Renton Lift Station Mitigotior Platt summer or early fall will be made to assess vegetation cover and survival against the project performance standards. Table 2. Monitoring Program Monitoring Location & Methods Year l Year 2 Year 3 Element Vegetation Percent woody cover Late Summer Late Summer Late Summer cover and data collected within or Early Fall or Early Fall or Early Fall establishment monitoring plots (Years 2 and 3). General observations of installed plant health and seed establishment across the site (all ears). Vegetation Comprehensive count Late Summer Late Summer Late Summer survival of installed plants or Early Fall or Early Fall or Early Fall (Year 1 only). Count of installed plants within monitoring plots (Years 2 and 3). General observations of installed plant health (all ears). Non-native General observations Early Spring Early Spring Early Spring invasive of invasive species. vegetation Percent cover data collected within Late Summer Late Summer Late Summer monitoring lots. or Early Fall or Early Fall or Early Fall Pipeline General observations Early Spring Early Spring Early Spring crossing of streambed and bank stability stability at pipeline crossing location. Late Summer Late Summer Late Summer or Early Fall or Early Fall or Early Fall 7.5 Monitoring Reports An as -built or record drawing will be provided to King County within 90 days of completion of the mitigation installation. Page 14 ESA JWY 2011 I I East Renton Lift Station Aliti-anon Plan 11 Monitoring reports will be prepared during Years 1, 2, and 3 to document the findings of the monitoring site visits. The reports will he submitted to King County by October 31 of each monitoring year. The monitoring reports will include: • Project background and monitoring schedule; • Restoration goals, objectives, and performance standards; • Quantitative plant survival, vigor, and aerial coverage of tree and shrub strata within the established monitoring plots; • General observations of site conditions and plant health across the restoration areas; • General observations of streambed and bank stability at pipeline crossing location; • Use of buffer area by humans and wildlife; • Documentation of completed maintenance activities; • Photographs taken from established photopoints; • Recommendations for additional maintenance actions; • Vegetation plot data (included as an appendix). King County will inspect the site after submittal of each monitoring report. 7.6 Maintenance and Corrective Action The City of Renton will commence maintenance of the restoration areas after acceptance of the as -built report and continue for three years. After initial planting acceptance by the professional biologist, the landscaping contractor will be responsible for plant survival for a period of one year. After this period, maintenance will be performed by City personnel. Maintenance will include, but is not limited to: • Installation of additional plantings if the combination of installed plants and regrowth of native volunteer species does not meet the minimum performance standards discussed above. All plants that die prior to Year 1 monitoring must be replaced. • Weeding twice per year during the maintenance period to remove invasive. non-native plant species in the restoration areas. Trees and shrubs will be weeded to the dripline. Examples of undesirable non-native plants include Himalayan blackberry, English ivy, Scot's broom, knotweed, and reed canarygrass. Weeding is to be performed by hand or with the lightest possible equipment. Use of herbicides is not allowed without prior approval by King County. • Adding wood fiber mulch rings around the base of each installed tree or shrub to maintain at least three inches depth of mulch. • Stabilizing eroded areas using bioengineering techniques that are appropriate if mulching, seeding or other standard erosion control methods fail. • Removing from the site all litter and non-native invasive vegetation. ESA page 1.5 hds 2011 East Renton Lift Station Mitieation Plan 8.0 CONTINGENCY PLAN Should any monitoring report reveal the mitigation has failed in whole or part, and should that failure be beyond the scope of routine maintenance, the City will submit a contingency plan to King County. Once approved, the contingency plan will be installed and will replace the approved mitigation plan. If the failure is substantial, the County will likely extend the monitoring period for that mitigation. 9.0 LIMITATIONS Within the limitations of schedule, budget, scope -of -work, and seasonal constraints, we warrant that this study was conducted in accordance with generally accepted environmental science practices, including the technical guidelines and criteria in effect at the time this study was performed, as outlined in the Methods section. The results and conclusions of this report represent the authors' best professional judgment, based upon information provided by the project proponent in addition to that obtained during the course of this study. No other warranty, expressed or implied, is made. 10.0 REFERENCES Casey, Laura, King County biologist. January 25, 2011 — pre -application meeting. ESA. 2011. East Renton Lift Station Elimination Wetland, Stream, and Wildlife Study. Revised June 2011. Prepared for Carollo Engineers and City of Renton. Fisher, Larry. WDFW biologist. March 23, 2011 - site visit. Hruby, T. 2004. Washington State Wetland Rating System for Western. Washington — Reti4sed. August 2004. Ecology publication number 04-06-025. Olympia, WA. King County. 2007. Critical Areas Mitigation Guidelines. Department of Development and Environmental Services. June 2007. Page 16 1 1 ESA JWY 2011 ' 1 1 1 1 Eat Renton Lift Station Mitigation Plan FIGURES ESA page 17 JillY 2011 q-Unincorpdtated`� Xdng Codnty SE i28 ■�� �' �k .�i...n.: ,�... to St •' ' -.-Tt�, e r L 1r.'t?�k'�Sr u�i6s • � � _ ,- $�Ei i 1Td tJii jsS � >{ .Y 136THk�. 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