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Home My WebLink AboutRS_Wetland_Delineation_Report_240205_v1 750 Sixth Street South | Kirkland, WA 98033 P 425.822.5242 | f 425.827.8136 | watershedco.com May 29, 2019 Osborn Consulting, Inc. Attn: Cheyenne Covington 1800 112th Ave. NE, Suite 220-E Bellevue, WA 98004 (425) 451-4009 Re: Renton 172nd St GSI Project, Wetland Delineation Report The Watershed Company Reference Number: 190229 Dear Cheyenne: On May 14, 2019, ecologists Logan Dougherty and Grace Brennan visited the 172nd Street GSI project in Renton, Washington (parcel #3956200000) to confirm prior delineation results done for the La Fortuna Townhomes project and extend the delineation line farther west in support of this project. This letter summarizes the findings of the study and details applicable federal, state, and local regulations. The following documents are enclosed:  Delineation Sketch  Wetland Determination Data Forms  Wetland Rating Forms Findings Summary Two wetlands (Wetlands A and B) are located near the project area. Wetland A lies on the western side of the La Fortuna property, and extends west past the parcel boundary. Wetland B is on the north east portion of the undeveloped area of the La Fortuna property. Wetland A is a Category II wetland with six habitat points, and Wetland B is a Category III wetland with four habitat points. The City of Renton requires a 100-foot standard buffer for Wetland A and a 50- foot standard buffer for Wetland B. Wetland Delineation Report Osborn Consulting, Inc. May 29, 2019 Page 2 Study Area The study area for this project is defined as areas on parcel 3956200000 within 200 feet of the stormwater outfalls located at the southern street end of 127th Ave SE, immediately south the SE 172nd Street in the City of Renton, WA. Methods Public‐domain information on the subject properties was reviewed for this delineation study. Resources and review findings are presented in Table 1 of the “Findings” section of this letter. The study area was evaluated for wetlands using methodology from the Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Western Mountains, Valleys, and Coast Region Version 2.0 (U.S. Army Corps of Engineers 2010). Presence or absence of wetlands was determined on the basis of an examination of vegetation, soils and hydrology. These parameters were sampled at several locations along the wetland boundary to determine the approximate wetland edge. Wetlands were classified using the Department of Ecology’s 2014 rating system (Hruby 2014). Characterization of climatic conditions for precipitation in the Wetland Determination Data Forms were determined using the WETS table methodology (USDA, NRCS 2015). The “Seattle Tacoma Intl AP” station from 1981‐2010 was used as a source for precipitation data (http://agacis.rcc‐acis.org/). The WETS table methodology uses climate data from the three months prior to the site visit month to determine if normal conditions are present in the study area region. The study area was also evaluated for streams based on the presence or absence of an ordinary high water mark (OHWM) as defined by Section 404 of the Clean Water Act, the Washington Administrative Code (WAC) 220‐660‐030, and the Revised Code of Washington (RCW) 90.58.030. Findings The study area is within in the Soos Creek sub-basin of the Duwamish – Green watershed (WRIA 9); Section 28 of Township 23 North, Range 05 East of the Public Land Survey System. It is located in the Spring Glen neighborhood of Renton, north of SE Petrovitsky Road. The property is along a moderate gradient, sloping downhill to the southwest. Areas east of the stormwater outfalls includes numerous attached townhome units, a private access road, lawns, and community gardens. The area south and west of the outfalls is undeveloped and forested. Wetland Delineation Report Osborn Consulting, Inc. May 29, 2019 Page 3 Reviewed public-domain information for the site is summarized below (Table 1). Table 1. Summary of online mapping and inventory resources. Wetlands One wetland (Wetland A) was delineated and flagged in the project area. Another wetland just outside of the study area (Wetland B) was delineated and flagged on the north east portion of the undeveloped area of the La Fortuna property. Wetland A is summarized in Table 2. Resource Summary USDA NRCS: Web Soil Survey Alderwood gravelly sandy loam, 8 to 15 percent slopes; Arents, Alderwood material, 6 to 15 percent slopes; Seattle Muck. USFWS: NWI Wetland Mapper Numerous wetlands identified on and adjacent to the project area. WDFW: PHS on the Web No priority habitat or species. WDFW: SalmonScape No salmonids mapped within project site. Documented presence of salmonids, approx. 1,000 feet south of project area. WA-DNR: Forest Practices Activity Mapping Tool No mapped streams. Nearest stream approximately 1,000 south. King County iMap Mapped wetlands in the project area. City of Renton maps Mapped wetlands in the project area. WETS Climatic Condition Normal Wetland Delineation Report Osborn Consulting, Inc. May 29, 2019 Page 4 Table 2. Wetland A assessment summary. WETLAND A – Assessment Summary Location: City of Renton Parcel #3956210000 WRIA / Sub-basin: Duwamish – Green (WIRA 9) / Soos Creek Photo 1. Wetland A. 2014 Western WA Ecology Rating: Category II Buffer Width and Buffer Setback: 100-ft buffer, 15-foot setback Wetland Size: Approximately 5 acres Cowardin Classification(s): Palustrine Forested HGM Classification(s): Depressional Wetland Data Sheet(s): DP – 1 Upland Data Sheet (s): DP – 2 Flag Color: Pink and black striped Flag Numbers: A-1 to A-45 Vegetation Tree stratum: Western red cedar, red alder, black cottonwood, Oregon ash, Pacific willow, Sitka willow Shrub stratum: Black twinberry, red-osier dogwood, Douglas spirea, vine maple, highbush cranberry, salmonberry Herb stratum: Skunk cabbage, slough sedge, small-fruited bulrush, lady fern, creeping buttercup Soils Soil survey: Alderwood gravelly sandy loam; Arents, Alderwood material; Seattle Muck Field data: Hydrogen sulfide (A4) Hydrology Source: Groundwater, piped and ditched runoff, precipitation Field data: High Water Table (A2), Saturation (A3), Hydrogen Sulfide Odor (C1) Wetland Functions Improving Water Quality Hydrologic Habitat Site Potential H M L H M L H M L Landscape Potential H M L H M L H M L Value H M L H M L H M L TOTAL Score Based on Ratings 9 7 6 22 Description and Comments Wetland A is a large forested wetland that drains to the south to an even larger wetland complex associated with Soos creek that is located south of SE Petrovitsky Road. Numerous stormwater pipes, culverts, and ditches flow into the wetland, likely providing much of the wetland hydrology. Wetland Delineation Report Osborn Consulting, Inc. May 29, 2019 Page 5 Streams The property lacked stream indicators including watermarks, channel definition, or hydraulically sorted sediments. Based on these findings, there are no jurisdictional streams present in the project area. Non-wetlands Areas outside of identified wetlands did not meet criteria for hydrophytic vegetation, hydric soils, and wetland hydrology. These areas are primarily forested. One area between the La Fortuna Townhomes stormwater outfall and Wetland A exhibits the three-parameter test for wetland. However, this area is not jurisdictional because it is an intentionally constructed stormwater feature created from a non-wetland site. A ditch running east-west is located just off site to the north. The ditch is four to six feet wide and approximately 150 feet long. The feature is linear with minimal variation in width and course. The eastern 75 feet of ditch is unvegetated. The western portion has been lined with landscape rocks. No standing water was present at the time of the site visit, but informal bridges and the presence of algae in the ditch suggest that water regularly inundates the feature. Local Regulations Wetland buffers in the City of Renton are determined by a combination of the wetland category and habitat score, as determined by the wetland rating system. Wetland A is a Category II Photo 3. Ditch feature, looking west. Wetland Delineation Report Osborn Consulting, Inc. May 29, 2019 Page 6 wetland with a habitat score of 6 and therefore requires a standard buffer of 100 feet. Wetland B rated as Category III with a habitat score of 4 and therefore requires a standard buffer of 50 feet. An additional 15-foot structure setback is required beyond the limit of each buffer. The area between the La Fortuna Townhomes stormwater outfall and Wetland A is a recently excavated feature identified as a “filter / spreader” on site mitigation plans and meets wetland criteria for hydrophytic plants, hydric soils, and wetland hydrology. However, it is clearly man-made stormwater feature and does not meet the Renton definition of a regulated wetland. According to RMC 4-3-050(B)(1), regulated wetlands do not include those artificial wetlands intentionally created from non-wetland sites. The ditch running east-west just off-site to the north is presumably an artificial, constructed feature due to the linear position and shape, lack of vegetation, and partial armoring. Therefore, it will likely not be regulated as a jurisdictional critical area. Stormwater Facilities According to RMC 4-3-050C(3), modifications to surface water discharge pipes and stormwater regional facilities are allowed in wetland buffers provided that they are designed to meet Washington State Department of Ecology’s Wetlands and Stormwater Management Guidelines or equivalent objectives. State and Federal Regulations Federal Agencies Most wetlands and streams are regulated by the Corps under section 404 of the Clean Water Act. Any proposed filling or other direct impacts to Waters of the U.S., including wetlands (except isolated wetlands), would require notification and permits from the Corps. Wetland A is not isolated. Wetland A appears to be isolated; a Jurisdictional Determination from the Corps would be required to confirm the wetland’s jurisdictional status. Unavoidable impacts to jurisdictional wetlands are typically required to be compensated through implementation of an approved mitigation plan. Federally permitted actions that could affect endangered species may also require a biological assessment study and consultation with the U.S. Fish and Wildlife Service and/or the National Marine Fisheries Service. Compliance with the Endangered Species Act must be demonstrated for activities within jurisdictional wetlands and the 100‐year floodplain. Application for Corps permits may also require an individual 401 Water Quality Certification and Coastal Zone Wetland Delineation Report Osborn Consulting, Inc. May 29, 2019 Page 7 Management Consistency determination from Ecology and a cultural resource study in accordance with Section 106 of the National Historic Preservation Act. Washington Department of Ecology (Ecology) Similar to the Corps, Ecology, under Section 401 of the Clean Water Act, is charged with reviewing, conditioning, and approving or denying certain federally permitted actions that result in discharges to state waters. However, Ecology review would only become necessary if a Section 404 permit from the Corps was issued. Therefore, if filling activities are avoided, authorization from Ecology would not be needed. If filling is proposed, a JARPA could be submitted to Ecology in order to obtain a Section 401 Water Quality Certification and Coastal Zone Management Consistency Determination. Ecology permits are either issued concurrently with the Corps permit or within 90 days following the Corps permit. In general, neither the Corps, nor Ecology nor regulates wetland buffers, unless direct impacts are proposed. When direct impacts are proposed, mitigated wetlands and streams may be required to employ buffers based on Corps and Ecology joint regulatory guidance. Washington Department o f Fish and Wildlife (WDFW) Chapter 77.55 of the RCW (the Hydraulic Code) gives WDFW the authority to review, condition, and approve or deny “any construction activity that will use, divert, obstruct, or change the bed or flow of state waters.” This provision includes any in‐water work, the crossing or bridging of any state waters and can sometimes include stormwater discharge to state waters. If a project meets regulatory requirements, WDFW will issue a Hydraulic Project Approval (HPA). Since there are no streams in proximity to the project outfalls, an HPA would not be needed on this project. Disclaimer The information contained in this letter is based on the application of technical guidelines currently accepted as the best available science and in conjunction with the manuals and criteria referenced above. All discussions, conclusions and recommendations reflect the best professional judgment of the author(s) and are based upon information available at the time the study was conducted. All work was completed within the constraints of budget, scope, and timing. The findings of this report are subject to verification and agreement by the appropriate local, state and federal regulatory authorities. No other warranty, expressed or implied, is made. Wetland Delineation Report Osborn Consulting, Inc. May 29, 2019 Page 8 Please call if you have any questions or if we can provide you with any additional information. Sincerely, Grace Brennan Ecologist Logan Dougherty Ecologist Enclosures Wetland Delineation Report Osborn Consulting, Inc. May 29, 2019 Page 9 References Anderson, P.S. et al. 2016. Determining the Ordinary High Water Mark for Shoreline Management Act Compliance in Washington State. (Publication #16-06-029). Olympia, WA: Shorelands and Environmental Assistance Program, Washington Department of Ecology. Hruby, T. 2014. Washington State Wetland Rating System for Western Washington: 2014 Update. (Publication #14-06-029). Olympia, WA: Washington Department of Ecology. Lichvar, R.W. and S. M. McColley. 2008. A Guide to Ordinary High Water Mark (OHWM) Delineation for Non-Perennial Streams in the Western Mountains, Valleys, and Coast Region of the United States. ERDC/CRREL TR-14-13. Hanover, NH: U.S. Army Engineer Research and Development Center. U.S. Army Corps of Engineers. 2010. Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Western Mountains, Valleys, and Coast Region (Version 2.0). ed. J. S. Wakely, R. W. Lichvar, and C. V. Noble. ERDC/EL TR-10-3. Vicksburg, MS: U.S. Army Engineer Research and Development Center. U.S. Department of Agriculture (USDA), Natural Resources Conservation Service (NRCS). 2015. National Engineering Handbook, Part 650 Engineering Field Handbook, Chapter 19 Hydrology Tools for Wetland Identification and Analysis. ed. R. A. Weber. 210-VI-NEH, Amend. 75. Washington, DC. Page 1 of 1 Wetland Delineation Sketch – City of Renton SE 172nd St Storm Water Improvements Parcel Number: 3956200000 Prepared for: Cheyenne Covington, Osborn Consulting Inc. Site Visit Date: 5/14/19 TWC Ref. No.: 190229 Wetland B Flags B-1 to B-10 Connect B-1 to B-10 DP-1 LEGEND Wetland Wetland Boundary – delineated 5/14/19 (Flags A-42 to A-45) Wetland Boundary – delineated 8/21/18, verified 5/14/19 (Flags A-1 to A-41) Non-delineated/non-verified Wetland Boundary Delineated Ditch boundary Non-delineated Ditch boundary La Fortuna stormwater outfall area Culvert Data Point (DP) Note: Field sketch only. Features depicted are approximate and not to scale. Wetland boundary is marked with pink- and black-striped flags. Data points are marked with yellow- and black-striped flags. Ditch Flags D-1 to D-8 Connect D-1 to D-8 Do not connect D-4 to D-5 DP-2 DP-3 DP-4 DP-5 DP-6 Wetland A Flags A-1 to A-45 US Army Corps of Engineers Western Mountains, Valleys, and Coast – Version 2.0 750 Sixth Street South Kirkland, Washington 98033 (425) 822-5242 watershedco.com WETLAND DETERMINATION DATA FORM Western Mountains, Valleys, and Coast Supplement to the 1987 COE Wetlands Delineation Manual Project Site: Renton 172nd Storm Water Improvements Sampling date: August 21, 2018 Applicant/Owner: Osborn Consulting Sampling Point: DP-1 Investigator: Logan Dougherty, Sam Payne City/County: Renton / King Sect., Township, Range: S 28 T 23N R 05E State: Washington Landform (hillslope, terrace, etc): Depression Slope (%): 0 Local relief (concave, convex, none): None Subregion (LRR): A Lat: Long: Datum: Soil Map Unit Name: Seattle Muck NWI classification: PFOC (Freshwater Forested/Shrub) Are climatic/hydrologic conditions on the site typical for this time of year? ☐ Yes ☒ No (If no, explain in remarks.) Are “Normal Circumstances” present on the site? ☒ Yes ☐ No (If needed, explain any answers in Remarks.) Are Vegetation☐, Soil ☐, or Hydrology ☐ significantly disturbed? Are Vegetation☐, Soil ☐, or Hydrology ☐ naturally problematic SUMMARY OF FINDINGS – Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes ☒ No ☐ Is the Sampling Point within a Wetland? Yes ☒ No ☐ Hydric Soils Present? Yes ☒ No ☐ Wetland Hydrology Present? Yes ☒ No ☐ Remarks: Drier than normal per WETS (Seattle-Tacoma International Airport) VEGETATION – Use scientific names of plants. Tree Stratum (Plot size: 5m diam.) Absolute % Cover Dominant Species? Indicator Status Dominance Test Worksheet 1. Alnus rubra 90 Y FAC Number of Dominant Species that are OBL, FACW, or FAC: 5 (A) 2. Populus balsamifera 30 Y FAC 3. Total Number of Dominant Species Across All Strata: 5 (B) 4. 120 = Total Cover Percent of Dominant Species that are OBL, FACW, or FAC: 100 (A/B) Sapling/Shrub Stratum (Plot size: 3m diam.) 1. Cornus sericea 70 Y FACW Prevalence Index Worksheet 2. Lonicera involucrata 60 Y FAC Total % Cover of Multiply by 3. OBL species x 1 = 4. FACW species x 2 = 5. FAC species x 3 = 130 = Total Cover FACU species x 4 = UPL species x 5 = Herb Stratum (Plot size: 1m diam.) Column totals (A) (B) 1. Carex obnupta 70 Y OBL 2. Prevalence Index = B / A = 3. 4. Hydrophytic Vegetation Indicators 5. ☒ Dominance test is > 50% 6. ☐ Prevalence test is ≤ 3.0 * 7. Morphological Adaptations * (provide supporting 8. ☐ data in remarks or on a separate sheet) 9. ☐ Wetland Non-Vascular Plants * 10. ☐ Problematic Hydrophytic Vegetation * (explain) 11. 70 = Total Cover * Indicators of hydric soil and wetland hydrology must be present, unless disturbed or problematic Woody Vine Stratum (Plot size: ) Hydrophytic Vegetation Present? Yes ☒ No ☐ 1. 2. 0 = Total Cover % Bare Ground in Herb Stratum: 30 Remarks : DP- 1 US Army Corps of Engineers Western Mountains, Valleys, and Coast – Version 2.0 750 Sixth Street South Kirkland, Washington 98033 (425) 822-5242 watershedco.com SOIL Sampling Point – DP- 1 HYDROLOGY WETLAND DETERMINATION DATA FORM Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Depth Matrix Redox Features (inches) Color (moist) % Color (moist) % Type1 Loc2 Texture Remarks 0-1 10YR 2/1 100 Muck High organic matter content 1-16 10YR 2/2 100 Silt loam Abundant non-decomposed organic matter 1Type: C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grains 2Loc: PL=Pore Lining, M=Matrix Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3 ☐ Histosol (A1) ☐ Sandy Redox (S5) ☐ 2cm Muck (A10) ☐ Histic Epipedon (A2) ☐ Stripped Matrix (S6) ☐ Red Parent Material (TF2) ☐ Black Histic (A3) ☐ Loamy Mucky Mineral (F1) (except MLRA 1) ☐ Other (explain in remarks) ☒ Hydrogen Sulfide (A4) ☐ Loamy Gleyed Matrix (F2) ☐ ☐ Depleted Below Dark Surface (A11) ☐ Depleted Matrix (F3) ☐ Thick Dark Surface (A12) ☐ Redox Dark Surface (F6) 3 Indicators of hydrophytic vegetation and wetland hydrology must be present, unless disturbed or problematic ☐ Sandy Mucky Mineral (S1) ☐ Depleted Dark Surface (F7) ☐ Sandy Gleyed Matrix (S4) ☐ Redox Depressions (F8) Restrictive Layer (if present): Hydric soil present? Yes ☒ No ☐ Type: Depth (inches): Remarks: Wetland Hydrology Indicators: Primary Indicators (minimum of one required: check all that apply): Secondary Indicators (2 or more required): ☐ Surface water (A1) ☐ Sparsely Vegetated Concave Surface (B8) ☒ Water-Stained Leaves (B9) (MLRA 1, 2, 4A & 4B) ☒ High Water Table (A2) ☐ Water-Stained Leaves (except MLRA 1, 2, 4A & 4B) (B9) ☐ Drainage Patterns (B10) ☒ Saturation (A3) ☐ Salt Crust (B11) ☐ Dry-Season Water Table (C2) ☐ Water Marks (B1) ☐ Aquatic Invertebrates (B13) ☐ Saturation Visible on Aerial Imagery (C9) ☐ Sediment Deposits (B2) ☒ Hydrogen Sulfide Odor (C1) ☒ Geomorphic Position (D2) ☐ Drift Deposits (B3) ☐ Oxidized Rhizospheres along Living Roots (C3) ☐ Shallow Aquitard (D3) ☐ Algal Mat or Crust (B4) ☐ Presence of Reduced Iron (C4) ☒ FAC-Neutral Test (D5) ☐ Iron Deposits (B5) ☐ Recent Iron Reduction in Tilled Soils (C6) ☐ Raised Ant Mounds (D6) (LRR A) ☐ Surface Soil Cracks (B6) ☐ Stunted or Stressed Plants (D1) (LRR A) ☐ Frost-Heave Hummocks ☐ Inundation Visible on Aerial Imagery (B7) ☐ Other (explain in remarks) Field Observations Wetland Hydrology Present? Yes ☒ No ☐ Surface Water Present? Yes ☐ No ☒ Depth (in): Water Table Present? Yes ☒ No ☐ Depth (in): 0 Saturation Present? (includes capillary fringe) Yes ☒ No ☐ Depth (in): 0 Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available: Remarks: US Army Corps of Engineers Western Mountains, Valleys, and Coast – Version 2.0 Western Mountains, Valleys, and Coast Supplement to the 1987 COE Wetlands Delineation Manual Project Site: Renton 172nd Storm Water Improvements Sampling date: August 21, 2018 Applicant/Owner: Osborn Consulting Sampling Point: DP-2 Investigator: Logan Dougherty, Sam Payne City/County: Renton / King Sect., Township, Range: S 28 T 23N R 05E State: Washington Landform (hillslope, terrace, etc): Hillslope Slope (%): 5-10 Local relief (concave, convex, none): None Subregion (LRR): A Lat: Long: Datum: Soil Map Unit Name: Seattle Muck NWI classification: PFOC (Freshwater Forested/Shrub) Are climatic/hydrologic conditions on the site typical for this time of year? ☐ Yes ☒ No (If no, explain in remarks.) Are “Normal Circumstances” present on the site? ☒ Yes ☐ No (If needed, explain any answers in Remarks.) Are Vegetation☐, Soil ☐, or Hydrology ☐ significantly disturbed? Are Vegetation☐, Soil ☐, or Hydrology ☐ naturally problematic SUMMARY OF FINDINGS – Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes ☒ No ☐ Is the Sampling Point within a Wetland? Yes ☐ No ☒ Hydric Soils Present? Yes ☐ No ☒ Wetland Hydrology Present? Yes ☐ No ☒ Remarks: Drier than normal per WETS (Seattle-Tacoma International Airport) VEGETATION – Use scientific names of plants. Tree Stratum (Plot size: 5m diam.) Absolute % Cover Dominant Species? Indicator Status Dominance Test Worksheet 1. Betula nigra 80 Y FACW Number of Dominant Species that are OBL, FACW, or FAC: 5 (A) 2. 3. Total Number of Dominant Species Across All Strata: 6 (B) 4. 80 = Total Cover Percent of Dominant Species that are OBL, FACW, or FAC: 83 (A/B) Sapling/Shrub Stratum (Plot size: 3m diam.) 1. Fraxinus latifolia 15 Y FACW Prevalence Index Worksheet 2. Thuja plicata 5 N FAC Total % Cover of Multiply by 3. Corylus cornuta 20 Y FACU OBL species x 1 = 4. Rubus armeniacus 15 Y FAC FACW species x 2 = 5. FAC species x 3 = 55 = Total Cover FACU species x 4 = UPL species x 5 = Herb Stratum (Plot size: 1m diam.) Column totals (A) (B) 1. Ranunculus repens 50 Y FAC 2. Poaceae sp. 40 Y FAC* Prevalence Index = B / A = 3. 4. Hydrophytic Vegetation Indicators 5. ☒ Dominance test is > 50% 6. ☐ Prevalence test is ≤ 3.0 * 7. Morphological Adaptations * (provide supporting 8. ☐ data in remarks or on a separate sheet) 9. ☐ Wetland Non-Vascular Plants * 10. ☐ Problematic Hydrophytic Vegetation * (explain) 11. 90 = Total Cover * Indicators of hydric soil and wetland hydrology must be present, unless disturbed or problematic Woody Vine Stratum (Plot size: ) Hydrophytic Vegetation Present? Yes ☒ No ☐ 1. 2. 0 = Total Cover % Bare Ground in Herb Stratum: 10 Remarks : *Presumed indicator status DP- 2 US Army Corps of Engineers Western Mountains, Valleys, and Coast – Version 2.0 750 Sixth Street South Kirkland, Washington 98033 (425) 822-5242 watershedco.com SOIL Sampling Point – DP- 2 HYDROLOGY WETLAND DETERMINATION DATA FORM Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Depth Matrix Redox Features (inches) Color (moist) % Color (moist) % Type1 Loc2 Texture Remarks 0-12 10YR 2/2 100 Sandy loam 1Type: C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grains 2Loc: PL=Pore Lining, M=Matrix Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3 ☐ Histosol (A1) ☐ Sandy Redox (S5) ☐ 2cm Muck (A10) ☐ Histic Epipedon (A2) ☐ Stripped Matrix (S6) ☐ Red Parent Material (TF2) ☐ Black Histic (A3) ☐ Loamy Mucky Mineral (F1) (except MLRA 1) ☐ Other (explain in remarks) ☐ Hydrogen Sulfide (A4) ☐ Loamy Gleyed Matrix (F2) ☐ ☐ Depleted Below Dark Surface (A11) ☐ Depleted Matrix (F3) ☐ Thick Dark Surface (A12) ☐ Redox Dark Surface (F6) 3 Indicators of hydrophytic vegetation and wetland hydrology must be present, unless disturbed or problematic ☐ Sandy Mucky Mineral (S1) ☐ Depleted Dark Surface (F7) ☐ Sandy Gleyed Matrix (S4) ☐ Redox Depressions (F8) Restrictive Layer (if present): Hydric soil present? Yes ☐ No ☒ Type: Depth (inches): Remarks: Very hard to dig soils. Wetland Hydrology Indicators: Primary Indicators (minimum of one required: check all that apply): Secondary Indicators (2 or more required): ☐ Surface water (A1) ☐ Sparsely Vegetated Concave Surface (B8) ☐ Water-Stained Leaves (B9) (MLRA 1, 2, 4A & 4B) ☐ High Water Table (A2) ☐ Water-Stained Leaves (except MLRA 1, 2, 4A & 4B) (B9) ☐ Drainage Patterns (B10) ☐ Saturation (A3) ☐ Salt Crust (B11) ☐ Dry-Season Water Table (C2) ☐ Water Marks (B1) ☐ Aquatic Invertebrates (B13) ☐ Saturation Visible on Aerial Imagery (C9) ☐ Sediment Deposits (B2) ☐ Hydrogen Sulfide Odor (C1) ☐ Geomorphic Position (D2) ☐ Drift Deposits (B3) ☐ Oxidized Rhizospheres along Living Roots (C3) ☐ Shallow Aquitard (D3) ☐ Algal Mat or Crust (B4) ☐ Presence of Reduced Iron (C4) ☐ FAC-Neutral Test (D5) ☐ Iron Deposits (B5) ☐ Recent Iron Reduction in Tilled Soils (C6) ☐ Raised Ant Mounds (D6) (LRR A) ☐ Surface Soil Cracks (B6) ☐ Stunted or Stressed Plants (D1) (LRR A) ☐ Frost-Heave Hummocks ☐ Inundation Visible on Aerial Imagery (B7) ☐ Other (explain in remarks) Field Observations Wetland Hydrology Present? Yes ☐ No ☒ Surface Water Present? Yes ☐ No ☒ Depth (in): Water Table Present? Yes ☐ No ☒ Depth (in): Saturation Present? (includes capillary fringe) Yes ☐ No ☒ Depth (in): Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available: Remarks: Completely dry US Army Corps of Engineers Western Mountains, Valleys, and Coast – Version 2.0 Western Mountains, Valleys, and Coast Supplement to the 1987 COE Wetlands Delineation Manual Project Site: Renton 172nd Storm Water Improvements Sampling date: August 21, 2018 Applicant/Owner: Osborn Consulting Sampling Point: DP-3 Investigator: Logan Dougherty, Sam Payne City/County: Renton / King Sect., Township, Range: S 28 T 23N R 05E State: Washington Landform (hillslope, terrace, etc): Depression Slope (%): 0 Local relief (concave, convex, none): None Subregion (LRR): A Lat: Long: Datum: Soil Map Unit Name: Seattle Muck NWI classification: PFOC (Freshwater Forested/Shrub) Are climatic/hydrologic conditions on the site typical for this time of year? ☐ Yes ☒ No (If no, explain in remarks.) Are “Normal Circumstances” present on the site? ☒ Yes ☐ No (If needed, explain any answers in Remarks.) Are Vegetation☐, Soil ☐, or Hydrology ☐ significantly disturbed? Are Vegetation☐, Soil ☐, or Hydrology ☐ naturally problematic SUMMARY OF FINDINGS – Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes ☒ No ☐ Is the Sampling Point within a Wetland? Yes ☒ No ☐ Hydric Soils Present? Yes ☒ No ☐ Wetland Hydrology Present? Yes ☒ No ☐ Remarks: Drier than normal per WETS (Seattle-Tacoma International Airport) VEGETATION – Use scientific names of plants. Tree Stratum (Plot size: 5m diam.) Absolute % Cover Dominant Species? Indicator Status Dominance Test Worksheet 1. Alnus rubra 95 Y FAC Number of Dominant Species that are OBL, FACW, or FAC: 5 (A) 2. 3. Total Number of Dominant Species Across All Strata: 5 (B) 4. 95 = Total Cover Percent of Dominant Species that are OBL, FACW, or FAC: 100 (A/B) Sapling/Shrub Stratum (Plot size: 3m diam.) 1. Cornus sericea 40 Y FACW Prevalence Index Worksheet 2. Lonicera involucrata 20 Y FAC Total % Cover of Multiply by 3. OBL species x 1 = 4. FACW species x 2 = 5. FAC species x 3 = 60 = Total Cover FACU species x 4 = UPL species x 5 = Herb Stratum (Plot size: 1m diam.) Column totals (A) (B) 1. Phalaris arundinacea 50 Y FACW 2. Ranunculus repens 30 Y FAC Prevalence Index = B / A = 3. Equisetum telmateia 5 N FACW 4. Hydrophytic Vegetation Indicators 5. ☒ Dominance test is > 50% 6. ☐ Prevalence test is ≤ 3.0 * 7. Morphological Adaptations * (provide supporting 8. ☐ data in remarks or on a separate sheet) 9. ☐ Wetland Non-Vascular Plants * 10. ☐ Problematic Hydrophytic Vegetation * (explain) 11. 85 = Total Cover * Indicators of hydric soil and wetland hydrology must be present, unless disturbed or problematic Woody Vine Stratum (Plot size: ) Hydrophytic Vegetation Present? Yes ☒ No ☐ 1. 2. 0 = Total Cover % Bare Ground in Herb Stratum: 15 Remarks : DP- 3 US Army Corps of Engineers Western Mountains, Valleys, and Coast – Version 2.0 750 Sixth Street South Kirkland, Washington 98033 (425) 822-5242 watershedco.com SOIL Sampling Point – DP- 3 HYDROLOGY WETLAND DETERMINATION DATA FORM Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Depth Matrix Redox Features (inches) Color (moist) % Color (moist) % Type1 Loc2 Texture Remarks 0-6 10YR 2/2 100 Sandy loam 6-16 10YR 2/2 90 10YR 4/6 5Y 5/1 5 5 C D M Sandy loam 1Type: C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grains 2Loc: PL=Pore Lining, M=Matrix Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3 ☐ Histosol (A1) ☐ Sandy Redox (S5) ☐ 2cm Muck (A10) ☐ Histic Epipedon (A2) ☐ Stripped Matrix (S6) ☐ Red Parent Material (TF2) ☐ Black Histic (A3) ☐ Loamy Mucky Mineral (F1) (except MLRA 1) ☐ Other (explain in remarks) ☐ Hydrogen Sulfide (A4) ☐ Loamy Gleyed Matrix (F2) ☐ ☐ Depleted Below Dark Surface (A11) ☐ Depleted Matrix (F3) ☐ Thick Dark Surface (A12) ☒ Redox Dark Surface (F6) 3 Indicators of hydrophytic vegetation and wetland hydrology must be present, unless disturbed or problematic ☐ Sandy Mucky Mineral (S1) ☐ Depleted Dark Surface (F7) ☐ Sandy Gleyed Matrix (S4) ☐ Redox Depressions (F8) Restrictive Layer (if present): Hydric soil present? Yes ☒ No ☐ Type: Depth (inches): Remarks: Wetland Hydrology Indicators: Primary Indicators (minimum of one required: check all that apply): Secondary Indicators (2 or more required): ☐ Surface water (A1) ☐ Sparsely Vegetated Concave Surface (B8) ☐ Water-Stained Leaves (B9) (MLRA 1, 2, 4A & 4B) ☐ High Water Table (A2) ☐ Water-Stained Leaves (except MLRA 1, 2, 4A & 4B) (B9) ☐ Drainage Patterns (B10) ☐ Saturation (A3) ☐ Salt Crust (B11) ☐ Dry-Season Water Table (C2) ☐ Water Marks (B1) ☐ Aquatic Invertebrates (B13) ☐ Saturation Visible on Aerial Imagery (C9) ☐ Sediment Deposits (B2) ☐ Hydrogen Sulfide Odor (C1) ☒ Geomorphic Position (D2) ☐ Drift Deposits (B3) ☐ Oxidized Rhizospheres along Living Roots (C3) ☐ Shallow Aquitard (D3) ☐ Algal Mat or Crust (B4) ☐ Presence of Reduced Iron (C4) ☒ FAC-Neutral Test (D5) ☐ Iron Deposits (B5) ☐ Recent Iron Reduction in Tilled Soils (C6) ☐ Raised Ant Mounds (D6) (LRR A) ☐ Surface Soil Cracks (B6) ☐ Stunted or Stressed Plants (D1) (LRR A) ☐ Frost-Heave Hummocks ☐ Inundation Visible on Aerial Imagery (B7) ☐ Other (explain in remarks) Field Observations Wetland Hydrology Present? Yes ☒ No ☐ Surface Water Present? Yes ☐ No ☒ Depth (in): Water Table Present? Yes ☐ No ☒ Depth (in): Saturation Present? (includes capillary fringe) Yes ☐ No ☒ Depth (in): Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available: Remarks: US Army Corps of Engineers Western Mountains, Valleys, and Coast – Version 2.0 Western Mountains, Valleys, and Coast Supplement to the 1987 COE Wetlands Delineation Manual Project Site: Renton 172nd Storm Water Improvements Sampling date: August 21, 2018 Applicant/Owner: Osborn Consulting Sampling Point: DP -4 Investigator: Logan Dougherty, Sam Payne City/County: Renton / King Sect., Township, Range: S 28 T 23N R 05E State: Washington Landform (hillslope, terrace, etc): Hillslope Slope (%): 2 Local relief (concave, convex, none): None Subregion (LRR): A Lat: Long: Datum: Soil Map Unit Name: Seattle Muck NWI classification: PFOC (Freshwater Forested/Shrub) Are climatic/hydrologic conditions on the site typical for this time of year? ☐ Yes ☒ No (If no, explain in remarks.) Are “Normal Circumstances” present on the site? ☒ Yes ☐ No (If needed, explain any answers in Remarks.) Are Vegetation☐, Soil ☐, or Hydrology ☐ significantly disturbed? Are Vegetation☐, Soil ☐, or Hydrology ☐ naturally problematic SUMMARY OF FINDINGS – Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes ☒ No ☐ Is the Sampling Point within a Wetland? Yes ☐ No ☒ Hydric Soils Present? Yes ☐ No ☒ Wetland Hydrology Present? Yes ☐ No ☒ Remarks: Drier than normal per WETS (Seattle-Tacoma International Airport) VEGETATION – Use scientific names of plants. Tree Stratum (Plot size: 5m diam.) Absolute % Cover Dominant Species? Indicator Status Dominance Test Worksheet 1. Betula nigra 40 Y FACW Number of Dominant Species that are OBL, FACW, or FAC: 3 (A) 2. 3. Total Number of Dominant Species Across All Strata: 3 (B) 4. 40 = Total Cover Percent of Dominant Species that are OBL, FACW, or FAC: 100 (A/B) Sapling/Shrub Stratum (Plot size: 3m diam.) 1. Cornus sericea 40 Y FACW Prevalence Index Worksheet 2. Populus balsamifera 5 N FAC Total % Cover of Multiply by 3. OBL species x 1 = 4. FACW species x 2 = 5. FAC species x 3 = 45 = Total Cover FACU species x 4 = UPL species x 5 = Herb Stratum (Plot size: 1m diam.) Column totals (A) (B) 1. Poaceae sp. 60 Y FAC* 2. Ranunculus repens 20 N FAC Prevalence Index = B / A = 3. Phalaris arundinacea 20 N FACW 4. Geranium robertianum 5 N FACU Hydrophytic Vegetation Indicators 5. ☒ Dominance test is > 50% 6. ☐ Prevalence test is ≤ 3.0 * 7. Morphological Adaptations * (provide supporting 8. ☐ data in remarks or on a separate sheet) 9. ☐ Wetland Non-Vascular Plants * 10. ☐ Problematic Hydrophytic Vegetation * (explain) 11. 105 = Total Cover * Indicators of hydric soil and wetland hydrology must be present, unless disturbed or problematic Woody Vine Stratum (Plot size: ) Hydrophytic Vegetation Present? Yes ☒ No ☐ 1. 2. 0 = Total Cover % Bare Ground in Herb Stratum: 0 Remarks : *Presumed indicator status DP- 4 US Army Corps of Engineers Western Mountains, Valleys, and Coast – Version 2.0 SOIL Sampling Point – DP- 4 HYDROLOGY Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Depth Matrix Redox Features (inches) Color (moist) % Color (moist) % Type1 Loc2 Texture Remarks 0-10 10YR 2/2 Sandy loam 10-14 10YR 2/2 Gravelly sandy loam 1Type: C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grains 2Loc: PL=Pore Lining, M=Matrix Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3 ☐ Histosol (A1) ☐ Sandy Redox (S5) ☐ 2cm Muck (A10) ☐ Histic Epipedon (A2) ☐ Stripped Matrix (S6) ☐ Red Parent Material (TF2) ☐ Black Histic (A3) ☐ Loamy Mucky Mineral (F1) (except MLRA 1) ☐ Other (explain in remarks) ☐ Hydrogen Sulfide (A4) ☐ Loamy Gleyed Matrix (F2) ☐ ☐ Depleted Below Dark Surface (A11) ☐ Depleted Matrix (F3) ☐ Thick Dark Surface (A12) ☐ Redox Dark Surface (F6) 3 Indicators of hydrophytic vegetation and wetland hydrology must be present, unless disturbed or problematic ☐ Sandy Mucky Mineral (S1) ☐ Depleted Dark Surface (F7) ☐ Sandy Gleyed Matrix (S4) ☐ Redox Depressions (F8) Restrictive Layer (if present): Hydric soil present? Yes ☐ No ☒ Type: Depth (inches): Remarks: Wetland Hydrology Indicators: Primary Indicators (minimum of one required: check all that apply): Secondary Indicators (2 or more required): ☐ Surface water (A1) ☐ Sparsely Vegetated Concave Surface (B8) ☐ Water-Stained Leaves (B9) (MLRA 1, 2, 4A & 4B) ☐ High Water Table (A2) ☐ Water-Stained Leaves (except MLRA 1, 2, 4A & 4B) (B9) ☐ Drainage Patterns (B10) ☐ Saturation (A3) ☐ Salt Crust (B11) ☐ Dry-Season Water Table (C2) ☐ Water Marks (B1) ☐ Aquatic Invertebrates (B13) ☐ Saturation Visible on Aerial Imagery (C9) ☐ Sediment Deposits (B2) ☐ Hydrogen Sulfide Odor (C1) ☐ Geomorphic Position (D2) ☐ Drift Deposits (B3) ☐ Oxidized Rhizospheres along Living Roots (C3) ☐ Shallow Aquitard (D3) ☐ Algal Mat or Crust (B4) ☐ Presence of Reduced Iron (C4) ☐ FAC-Neutral Test (D5) ☐ Iron Deposits (B5) ☐ Recent Iron Reduction in Tilled Soils (C6) ☐ Raised Ant Mounds (D6) (LRR A) ☐ Surface Soil Cracks (B6) ☐ Stunted or Stressed Plants (D1) (LRR A) ☐ Frost-Heave Hummocks ☐ Inundation Visible on Aerial Imagery (B7) ☐ Other (explain in remarks) Field Observations Wetland Hydrology Present? Yes ☐ No ☒ Surface Water Present? Yes ☐ No ☐ Depth (in): Water Table Present? Yes ☐ No ☐ Depth (in): Saturation Present? (includes capillary fringe) Yes ☐ No ☐ Depth (in): Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available: Remarks: US Army Corps of Engineers Western Mountains, Valleys, and Coast – Version 2.0 DP-5 Project/Site: Renton 172nd Storm Water Improvements City/County: Renton Sampling date: 5/14/19 Applicant/Owner: Osborn Consulting State: WA Sampling Point: 5 Investigator(s): L. Dougherty, G. Brennan Section, Township, Range: S28 T23N R05E Landform (hillslope, terrace, etc): Swale Local relief (concave, convex, none): Concave Slope (%): <5% Subregion (LRR): A Lat: - Long: - Datum: - Soil Map Unit Name: Alderwood gravelly loam NWI classification: None Are climatic / hydrologic conditions on the site typical for this time of year? ☒ Yes ☐ No (If no, explain in remarks.) Are Vegetation ☒, Soil ☐, or Hydrology ☐ significantly disturbed? Are “Normal Circumstances” present on the site? ☒ Yes ☐ No Are Vegetation ☐, Soil ☐, or Hydrology ☐ naturally problematic? (If needed, explain any answers in Remarks.) SUMMARY OF FINDINGS – Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes ☐ No ☒ Is the Sampled Area within a Wetland? Yes ☐ No ☒ Hydric Soils Present? Yes ☒ No ☐ Wetland Hydrology Present? Yes ☐ No ☒ Remarks: Ditch in-pit VEGETATION – Use scientific names of plants. Tree Stratum (Plot size: 5-m diameter) Absolute % Cover Dominant Species? Indicator Status Dominance Test worksheet: Number of Dominant Species that are OBL, FACW, or FAC: Click here to enter text. (A) 1. Populus balsamifera (rooted out) 25 N FAC 2. Alnus rubra (rooted out) 20 N FAC Total Number of Dominant Species Across all Strata: Click here to enter text. (B) 3. 4. Percent of Dominant Species that are OBL, FACW, or FAC: Click here to enter text. (A/B) 45 = Total Cover Sapling/Shrub Stratum (Plot size: 3-m diameter) Prevalence Index worksheet: 1. N/A Total % Cover of: Multiply by: 2. OBL species x 1 = 3. FACW species x 2 = 4. FAC species x 3 = 5. FACU species x 4 = 0 = Total Cover UPL species x 5 = Herb Stratum (Plot size: 1-m diameter) Column Totals: (A) (B) 1. Phalaris arudinacea <1 N FACW Prevalence Index = B/A = 2. 3. Hydrophytic Vegetation Indicators: 4. ☐ 1 – Rapid Test for Hydrophytic Vegetation 5. ☐ 2 – Dominance Test is > 50% 6. ☐ 3 – Prevalence Index is ≤ 3.01 7. ☐ 4 – Morphological Adaptations1 (Provide supporting data in Remarks or on a separate sheet) 8. 9. ☐ 5 – Wetland Non-Vascular Plants1 10. ☐ Problematic Hydrophytic Vegetation1 (Explain) 11. 1Indicators of hydric soil and wetland hydrology must be present, unless disturbed or problematic. <1 = Total Cover Woody Vine Stratum (Plot size: 3-m diameter) Hydrophytic Vegetation Present? Yes ☐ No ☒ 1. 2. 0 = Total Cover % Bare Ground in Herb Stratum: 99%* Remarks: Unvegetated swale WETLAND DETERMINATION DATA FORM – Western Mountains, Valleys, and Coast Region US Army Corps of Engineers Western Mountains, Valleys, and Coast – Version 2.0 SOIL Sampling Point: DP-5 HYDROLOGY Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Depth Matrix Redox Features (inches) Color (moist) % Color (moist) % Type1 Loc2 Texture Remarks 0-7 10YR 2/2 100 Clay loam 7-11 2.5Y 4/1 93 10Y 3/4 7 C M Clay loam 11-16 2.5Y 6/1 95 10Y 5/4 5 C M Loamy clay 1Type: C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grains. 2Loc: PL=Pore Lining, M=Matrix. Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3: ☐ Histosol (A1) ☐ Sandy Redox (S5) ☐ 2cm Muck (A10) ☐ Histic Epipedon (A2) ☐ Stripped Matrix (S6) ☐ Red Parent Material (TF2) ☐ Black Histic (A3) ☐ Loamy Mucky Mineral (F1) (except MLRA 1) ☐ Very Shallow Dark Surface (TF12) ☐ Hydrogen Sulfide (A4) ☐ Loamy Gleyed Matrix (F2) ☐ Other (Explain in Remarks) ☐ Depleted Below Dark Surface (A11) ☒ Depleted Matrix (F3) ☐ Thick Dark Surface (A12) ☐ Redox Dark Surface (F6) 3 Indicators of hydrophytic vegetation and wetland hydrology must be present, unless disturbed or problematic. ☐ Sandy Mucky Mineral (S1) ☐ Depleted Dark Surface (F7) ☐ Sandy Gleyed Matrix (S4) ☐ Redox Depressions (F8) Restrictive Layer (if present): Hydric soil present? Yes ☒ No ☐ Type: Depth (inches): Remarks: Wetland Hydrology Indicators: Primary Indicators (minimum of one required: check all that apply) Secondary Indicators (2 or more required) ☐ Surface water (A1) ☐ Water-Stained Leaves (except MLRA 1, 2, 4A & 4B) (B9) ☐ Water-Stained Leaves (B9) (MLRA 1, 2, 4A & 4B) ☐ High Water Table (A2) ☐ Saturation (A3) ☐ Salt Crust (B11) ☒ Drainage Patterns (B10) ☐ Water Marks (B1) ☐ Aquatic Invertebrates (B13) ☐ Dry-Season Water Table (C2) ☐ Sediment Deposits (B2) ☐ Hydrogen Sulfide Odor (C1) ☐ Saturation Visible on Aerial Imagery (C9) ☐ Drift Deposits (B3) ☐ Oxidized Rhizospheres along Living Roots (C3) ☐ Geomorphic Position (D2) ☐ Algal Mat or Crust (B4) ☐ Presence of Reduced Iron (C4) ☐ Shallow Aquitard (D3) ☐ Iron Deposits (B5) ☐ Recent Iron Reduction in Tilled Soils (C6) ☐ FAC-Neutral Test (D5) ☐ Surface Soil Cracks (B6) ☐ Stunted or Stressed Plants (D1) (LRR A) ☐ Raised Ant Mounds (D6) (LRR A) ☐ Inundation Visible on Aerial Imagery (B7) ☐ Other (explain in remarks) ☐ Frost-Heave Hummocks ☐ Sparsely Vegetated Concave Surface (B8) Field Observations: Wetland Hydrology Present? Yes ☐ No ☒ Surface Water Present? Yes ☐ No ☒ Depth (in): Water Table Present? Yes ☐ No ☒ Depth (in): Saturation Present? Yes ☐ No ☒ Depth (in): (includes capillary fringe) Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available: Remarks: Soil damp but not saturated to 16 inches. Some algae present, not enough to be described as an algal mat. US Army Corps of Engineers Western Mountains, Valleys, and Coast – Version 2.0 DP-6 Project/Site: Renton 172nd City/County: Renton Sampling date: 5/14/19 Applicant/Owner: Osborn Consulting State: WA Sampling Point: 6 Investigator(s): L. Dougherty, G. Brennan Section, Township, Range: S28 T23N R05E Landform (hillslope, terrace, etc): Berm Local relief (concave, convex, none): Convex Slope (%): <1% Subregion (LRR): A Lat: - Long: - Datum: - Soil Map Unit Name: Alderwood gravelly loam NWI classification: None Are climatic / hydrologic conditions on the site typical for this time of year? ☒ Yes ☐ No (If no, explain in remarks.) Are Vegetation ☐, Soil ☐, or Hydrology ☐ significantly disturbed? Are “Normal Circumstances” present on the site? ☒ Yes ☐ No Are Vegetation ☐, Soil ☐, or Hydrology ☐ naturally problematic? (If needed, explain any answers in Remarks.) SUMMARY OF FINDINGS – Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes ☒ No ☐ Is the Sampled Area within a Wetland? Yes ☐ No ☒ Hydric Soils Present? Yes ☐ No ☒ Wetland Hydrology Present? Yes ☐ No ☒ Remarks: Click here to enter text. VEGETATION – Use scientific names of plants. Tree Stratum (Plot size: 5-m diameter) Absolute % Cover Dominant Species? Indicator Status Dominance Test worksheet: Number of Dominant Species that are OBL, FACW, or FAC: 3 (A) 1. Thuja plicata 45 N FAC 2. Populus balsamifera 80 Y FAC Total Number of Dominant Species Across all Strata: 3 (B) 3. Alnus rubra 80 Y FAC 4. Percent of Dominant Species that are OBL, FACW, or FAC: 100 (A/B) = Total Cover Sapling/Shrub Stratum (Plot size: 3-m diameter) Prevalence Index worksheet: 1. Rubus armeniacus 45 Y FAC Total % Cover of: Multiply by: 2. Cornus sericea 40 Y FACW OBL species x 1 = 3. FACW species x 2 = 4. FAC species x 3 = 5. FACU species x 4 = 85 = Total Cover UPL species x 5 = Herb Stratum (Plot size: 1-m diameter) Column Totals: (A) (B) 1. Ranunculus repens 5 N FAC Prevalence Index = B/A = 2. Equisetum telmateia 1 N FACW 3. Hydrophytic Vegetation Indicators: 4. ☐ 1 – Rapid Test for Hydrophytic Vegetation 5. ☒ 2 – Dominance Test is > 50% 6. ☐ 3 – Prevalence Index is ≤ 3.01 7. ☐ 4 – Morphological Adaptations1 (Provide supporting data in Remarks or on a separate sheet) 8. 9. ☐ 5 – Wetland Non-Vascular Plants1 10. ☐ Problematic Hydrophytic Vegetation1 (Explain) 11. 1Indicators of hydric soil and wetland hydrology must be present, unless disturbed or problematic. 6 = Total Cover Woody Vine Stratum (Plot size: 3-m diameter) Hydrophytic Vegetation Present? Yes ☒ No ☐ 1. 2. 0 = Total Cover % Bare Ground in Herb Stratum: 94 Remarks: Bare ground is mostly covered in leaves and duff WETLAND DETERMINATION DATA FORM – Western Mountains, Valleys, and Coast Region US Army Corps of Engineers Western Mountains, Valleys, and Coast – Version 2.0 SOIL Sampling Point: DP-6 HYDROLOGY Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Depth Matrix Redox Features (inches) Color (moist) % Color (moist) % Type1 Loc2 Texture Remarks 0-16 10YR 2/2 100 Gravelly loam 1Type: C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grains. 2Loc: PL=Pore Lining, M=Matrix. Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3: ☐ Histosol (A1) ☐ Sandy Redox (S5) ☐ 2cm Muck (A10) ☐ Histic Epipedon (A2) ☐ Stripped Matrix (S6) ☐ Red Parent Material (TF2) ☐ Black Histic (A3) ☐ Loamy Mucky Mineral (F1) (except MLRA 1) ☐ Very Shallow Dark Surface (TF12) ☐ Hydrogen Sulfide (A4) ☐ Loamy Gleyed Matrix (F2) ☐ Other (Explain in Remarks) ☐ Depleted Below Dark Surface (A11) ☐ Depleted Matrix (F3) ☐ Thick Dark Surface (A12) ☐ Redox Dark Surface (F6) 3 Indicators of hydrophytic vegetation and wetland hydrology must be present, unless disturbed or problematic. ☐ Sandy Mucky Mineral (S1) ☐ Depleted Dark Surface (F7) ☐ Sandy Gleyed Matrix (S4) ☐ Redox Depressions (F8) Restrictive Layer (if present): Hydric soil present? Yes ☐ No ☒ Type: Depth (inches): Remarks: Wetland Hydrology Indicators: Primary Indicators (minimum of one required: check all that apply) Secondary Indicators (2 or more required) ☐ Surface water (A1) ☐ Water-Stained Leaves (except MLRA 1, 2, 4A & 4B) (B9) ☐ Water-Stained Leaves (B9) (MLRA 1, 2, 4A & 4B) ☐ High Water Table (A2) ☐ Saturation (A3) ☐ Salt Crust (B11) ☐ Drainage Patterns (B10) ☐ Water Marks (B1) ☐ Aquatic Invertebrates (B13) ☐ Dry-Season Water Table (C2) ☐ Sediment Deposits (B2) ☐ Hydrogen Sulfide Odor (C1) ☐ Saturation Visible on Aerial Imagery (C9) ☐ Drift Deposits (B3) ☐ Oxidized Rhizospheres along Living Roots (C3) ☐ Geomorphic Position (D2) ☐ Algal Mat or Crust (B4) ☐ Presence of Reduced Iron (C4) ☐ Shallow Aquitard (D3) ☐ Iron Deposits (B5) ☐ Recent Iron Reduction in Tilled Soils (C6) ☐ FAC-Neutral Test (D5) ☐ Surface Soil Cracks (B6) ☐ Stunted or Stressed Plants (D1) (LRR A) ☐ Raised Ant Mounds (D6) (LRR A) ☐ Inundation Visible on Aerial Imagery (B7) ☐ Other (explain in remarks) ☐ Frost-Heave Hummocks ☐ Sparsely Vegetated Concave Surface (B8) Field Observations: Wetland Hydrology Present? Yes ☐ No ☒ Surface Water Present? Yes ☐ No ☒ Depth (in): Water Table Present? Yes ☐ No ☒ Depth (in): Saturation Present? Yes ☐ No ☒ Depth (in): (includes capillary fringe) Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available: Remarks: Moist but not saturated to 16 inches. Wetland Rating System for Western WA: 2014 Update Rating Form – Effective January 1, 2015 1 Wetland name or number: Wetland A RATING SUMMARY – Western Washington Name of wetland (or ID #): Wetland A Date of site visit: August 21, 2018 Rated by: Sam Payne, Logan Dougherty Trained by Ecology? ☒Y ☐N Date of training: June 2017 HGM Class used for rating: Depressional Wetland has multiple HGM classes? ☐Y ☒N NOTE: Form is not complete without the figures requested (figures can be combined). Source of base aerial photo/map: King County iMap, Bing Maps OVERALL WETLAND CATEGORY (based on functions ☒ or special characteristics ☐) 1. Category of wetland based on FUNCTIONS ☐ Category I – Total score = 23 - 27 ☒ Category II – Total score = 20 - 22 ☐ Category III – Total score = 16 - 19 ☐ Category IV – Total score = 9 - 15 FUNCTION Improving Water Quality Hydrologic Habitat Circle the appropriate ratings Site Potential H M L H M L H M L Landscape Potential H M L H M L H M L Value H M L H M L H M L TOTAL Score Based on Ratings 9 7 6 22 2. Category based on SPECIAL CHARACTERISTICS of wetland CHARACTERISTIC CATEGORY Estuarine I II Wetland of High Conservation Value I Bog I Mature Forest I Old Growth Forest I Coastal Lagoon I II Interdunal I II III IV None of the above ☒ Score for each function based on three ratings (order of ratings is not important) 9 = H,H,H 8 = H,H,M 7 = H,H,L 7 = H,M,M 6 = H,M,L 6 = M,M,M 5 = H,L,L 5 = M,M,L 4 = M,L,L 3 = L,L,L Wetland Rating System for Western WA: 2014 Update Rating Form – Effective January 1, 2015 2 Wetland name or number: Wetland A Maps and figures required to answer questions correctly for Western Washington Depressional Wetlands Map of: To answer questions: Figure # Cowardin plant classes D 1.3, H 1.1, H 1.4 1 Hydroperiods D 1.4, H 1.2 2 Location of outlet (can be added to map of hydroperiods) D 1.1, D 4.1 2 Boundary of area within 150 ft of the wetland (can be added to another figure) D 2.2, D 5.2 2 Map of the contributing basin D 4.3, D 5.3 3 1 km Polygon: Area that extends 1 km from entire wetland edge - including polygons for accessible habitat and undisturbed habitat H 2.1, H 2.2, H 2.3 6 Screen capture of map of 303(d) listed waters in basin (from Ecology website) D 3.1, D 3.2 7 Screen capture of list of TMDLs for WRIA in which unit is found (from web) D 3.3 8 Wetland Rating System for Western WA: 2014 Update Rating Form – Effective January 1, 2015 3 Wetland name or number: Wetland A HGM Classification of Wetlands in Western Washington 1. Are the water levels in the entire unit usually controlled by tides except during floods? ☒NO – go to 2 ☐YES – the wetland class is Tidal Fringe – go to 1.1 1.1 Is the salinity of the water during periods of annual low flow below 0.5 ppt (parts per thousand)? NO – Saltwater Tidal Fringe (Estuarine) YES – Freshwater Tidal Fringe If your wetland can be classified as a Freshwater Tidal Fringe use the forms for Riverine wetlands. If it is Saltwater Tidal Fringe it is an Estuarine wetland and is not scored. This method cannot be used to score functions for estuarine wetlands. 2. The entire wetland unit is flat and precipitation is the only source (>90%) of water to it. Groundwater and surface water runoff are NOT sources of water to the unit. ☒NO – go to 3 ☐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 all of the following criteria? ☐The vegetated part of the wetland is on the shores of a body of permanent open water (without any plants on the surface at any time of the year) at least 20 ac (8 ha) in size; ☐At least 30% of the open water area is deeper than 6.6 ft (2 m). ☒NO – go to 4 ☐YES – The wetland class is Lake Fringe (Lacustrine Fringe) 4. Does the entire wetland unit meet all of the following criteria? ☐The wetland is on a slope (slope can be very gradual), ☐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, ☐The water leaves the wetland without being impounded. ☒NO – go to 5 ☐YES – The wetland class is Slope NOTE: Surface water does not pond in these type of wetlands except occasionally in very small and shallow depressions or behind hummocks (depressions are usually <3 ft diameter and less than 1 ft deep). 5. Does the entire wetland unit meet all of the following criteria? ☐The unit is in a valley, or stream channel, where it gets inundated by overbank flooding from that stream or river, ☐The overbank flooding occurs at least once every 2 years. For questions 1-7, the criteria described must apply to the entire unit being rated. If the hydrologic criteria listed in each question do not apply to the entire unit being rated, you probably have a unit with multiple HGM classes. In this case, identify which hydrologic criteria in questions 1-7 apply, and go to Question 8. Wetland Rating System for Western WA: 2014 Update Rating Form – Effective January 1, 2015 4 Wetland name or number: Wetland A ☒NO – go to 6 ☐YES – The wetland class is Riverine NOTE: The Riverine unit can contain depressions that are filled with water when the river is not flooding 6. Is the entire wetland unit in a topographic depression in which water ponds, or is saturated to the surface, at some time during the year? This means that any outlet, if present, is higher than the interior of the wetland. ☐NO – go to 7 ☒YES – The wetland class is Depressional 7. Is the entire wetland unit located in a very flat area 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 classes. For example, seeps at the base of a slope may grade into a riverine floodplain, 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 IN 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 the wetland unit being scored. 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 HGM 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. HGM classes within the wetland unit being rated HGM class to use in rating Slope + Riverine Riverine Slope + Depressional Depressional Slope + Lake Fringe Lake Fringe Depressional + Riverine along stream within boundary of depression Depressional Depressional + Lake Fringe Depressional Riverine + Lake Fringe Riverine Salt Water Tidal Fringe and any other class of freshwater wetland Treat as ESTUARINE If you are still unable to determine which of the above criteria apply to your wetland, or if you have more than 2 HGM classes within a wetland boundary, classify the wetland as Depressional for the rating. Wetland Rating System for Western WA: 2014 Update Rating Form – Effective January 1, 2015 5 Wetland name or number: Wetland A DEPRESSIONAL AND FLATS WETLANDS Water Quality Functions - Indicators that the site functions to improve water quality D 1.0. Does the site have the potential to improve water quality? D 1.1. Characteristics of surface water outflows from the wetland: ☐ Wetland is a depression or flat depression (QUESTION 7 on key) with no surface water leaving it (no outlet). points = 3 ☐ Wetland has an intermittently flowing stream or ditch, OR highly constricted permanently flowing outlet. points = 2 ☒ Wetland has an unconstricted, or slightly constricted, surface outlet that is permanently flowing. points = 1 ☐ Wetland is a flat depression (QUESTION 7 on key), whose outlet is a permanently flowing ditch. points = 1 1 D 1.2. The soil 2 in below the surface (or duff layer) is true clay or true organic (use NRCS definitions).☒Yes = 4 ☐No = 0 4 D 1.3. Characteristics and distribution of persistent plants (Emergent, Scrub-shrub, and/or Forested Cowardin classes): ☒ Wetland has persistent, ungrazed, plants > 95% of area points = 5 ☐ Wetland has persistent, ungrazed, plants > 1/2 of area points = 3 ☐ Wetland has persistent, ungrazed plants > 1/10 of area points = 1 ☐ Wetland has persistent, ungrazed plants < 1/10 of area points = 0 5 D 1.4. Characteristics of seasonal ponding or inundation: This is the area that is ponded for at least 2 months. See description in manual. ☒ Area seasonally ponded is > ½ total area of wetland points = 4 ☐ Area seasonally ponded is > ¼ total area of wetland points = 2 ☐ Area seasonally ponded is < ¼ total area of wetland points = 0 4 Total for D 1 Add the points in the boxes above 14 Rating of Site Potential If score is: ☒12-16 = H ☐6-11 = M ☐0-5 = L Record the rating on the first page D 2.0. Does the landscape have the potential to support the water quality function of the site? D 2.1. Does the wetland unit receive stormwater discharges? ☒Yes = 1 ☐No = 0 1 D 2.2. Is > 10% of the area within 150 ft of the wetland in land uses that generate pollutants? ☒Yes = 1 ☐No = 0 1 D 2.3. Are there septic systems within 250 ft of the wetland? ☒Yes = 1 ☐No = 0 1 D 2.4. Are there other sources of pollutants coming into the wetland that are not listed in questions D 2.1-D 2.3? Source: Click here to enter text. ☐Yes = 1 ☒No = 0 0 Total for D 2 Add the points in the boxes above 3 Rating of Landscape Potential If score is: ☒3 or 4 = H ☐1 or 2 = M ☐0 = L Record the rating on the first page D 3.0. Is the water quality improvement provided by the site valuable to society? D 3.1. Does the wetland discharge directly (i.e., within 1 mi) to a stream, river, lake, or marine water that is on the 303(d) list? ☐Yes = 1 ☒No = 0 0 D 3.2. Is the wetland in a basin or sub-basin where an aquatic resource is on the 303(d) list? ☒Yes = 1 ☐No = 0 1 D 3.3. Has the site been identified in a watershed or local plan as important for maintaining water quality (answer YES if there is a TMDL for the basin in which the unit is found)? ☒Yes = 2 ☐No = 0 2 Total for D 3 Add the points in the boxes above 3 Rating of Value If score is: ☒2-4 = H ☐1 = M ☐0 = L Record the rating on the first page Wetland Rating System for Western WA: 2014 Update Rating Form – Effective January 1, 2015 6 Wetland name or number: Wetland A DEPRESSIONAL AND FLATS WETLANDS Hydrologic Functions - Indicators that the site functions to reduce flooding and stream degradation D 4.0. Does the site have the potential to reduce flooding and erosion? D 4.1. Characteristics of surface water outflows from the wetland: ☐ Wetland is a depression or flat depression with no surface water leaving it (no outlet). points = 4 ☐ Wetland has an intermittently flowing stream or ditch, OR highly constricted permanently flowing outlet. points = 2 ☐ Wetland is a flat depression (QUESTION 7 on key), whose outlet is a permanently flowing ditch. points = 1 ☒ Wetland has an unconstricted, or slightly constricted, surface outlet that is permanently flowing. points = 0 0 D 4.2. Depth of storage during wet periods: Estimate the height of ponding above the bottom of the outlet. For wetlands with no outlet, measure from the surface of permanent water or if dry, the deepest part. ☐ Marks of ponding are 3 ft or more above the surface or bottom of outlet. points = 7 ☐ Marks of ponding between 2 ft to < 3 ft 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 ☐ The wetland is a “headwater” wetland. points = 3 ☐ Wetland is flat but has small depressions on the surface that trap water. points = 1 ☐ Marks of ponding less than 0.5 ft (6 in). points = 0 3 D 4.3. Contribution of the wetland 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 wetland unit itself. ☐ The area of the basin is less than 10 times the area of the 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 wetland is in the Flats class. points = 5 3 Total for D 4 Add the points in the boxes above 6 Rating of Site Potential If score is: ☐12-16 = H ☒6-11 = M ☐0-5 = L Record the rating on the first page D 5.0. Does the landscape have the potential to support hydrologic functions of the site? D 5.1. Does the wetland receive stormwater discharges? ☒Yes = 1 ☐No = 0 1 D 5.2. Is >10% of the area within 150 ft of the wetland in land uses that generate excess runoff? ☒Yes = 1 ☐No = 0 1 D 5.3. Is more than 25% of the contributing basin of the wetland covered with intensive human land uses (residential at >1 residence/ac, urban, commercial, agriculture, etc.)? ☒Yes = 1 ☐No = 0 1 Total for D 5 Add the points in the boxes above 3 Rating of Landscape Potential If score is: ☒3 = H ☐1 or 2 = M ☐0 = L Record the rating on the first page D 6.0. Are the hydrologic functions provided by the site valuable to society? D 6.1. The unit is in a landscape that has flooding problems. Choose the description that best matches conditions around the wetland unit being rated. Do not add points. Choose the highest score if more than one condition is met. The wetland captures surface water that would otherwise flow down-gradient into areas where flooding has damaged human or natural resources (e.g., houses or salmon redds):  ☐ Flooding occurs in a sub-basin that is immediately down-gradient of unit. points = 2  ☒ Surface flooding problems are in a sub-basin farther down-gradient. points = 1 ☐ Flooding from groundwater is an issue in the sub-basin. points = 1 ☐ The existing or potential outflow from the wetland is so constrained by human or natural conditions that the water stored by the wetland cannot reach areas that flood. Explain why: …. points = 0 ☐There are no problems with flooding downstream of the wetland. points = 0 1 D 6.2. Has the site been identified as important for flood storage or flood conveyance in a regional flood control plan? ☐Yes = 2 ☒No = 0 0 Total for D 6 Add the points in the boxes above 1 Rating of Value If score is: ☐2-4 = H ☒1 = M ☐0 = L Record the rating on the first page Wetland name or number: Wetland A Wetland Rating System for Western WA: 2014 Update Rating Form – Effective January 1, 2015 7 These questions apply to wetlands of all HGM classes. HABITAT FUNCTIONS - Indicators that site functions to provide important habitat H 1.0. Does the site have the potential to provide habitat? H 1.1. Structure of plant community: Indicators are Cowardin classes and strata within the Forested class. Check the Cowardin plant classes in the wetland. Up to 10 patches may be combined for each class to meet the threshold of ¼ ac or more than 10% of the unit if it is smaller than 2.5 ac. Add the number of structures checked. ☐ Aquatic bed 4 structures or more: points = 4 ☐ Emergent 3 structures: points = 2 ☐ Scrub-shrub (areas where shrubs have > 30% cover) 2 structures: points = 1 ☒ Forested (areas where trees have > 30% cover) 1 structure: points = 0 If the 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 1 H 1.2. Hydroperiods Check the types of water regimes (hydroperiods) present within the wetland. The water regime has to cover more than 10% of the wetland or ¼ ac to count (see text for descriptions of hydroperiods). ☒ Permanently flooded or inundated 4 or more types present: points = 3 ☒ Seasonally flooded or inundated 3 types present: points = 2 ☐ Occasionally flooded or inundated 2 types present: points = 1 ☒ 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 Fringe wetland 2 points ☐ Freshwater tidal wetland 2 points 2 H 1.3. Richness of plant species Count the number of plant species in the wetland that cover at least 10 ft2. Different patches of the same species can be combined to meet the size threshold and you do not have to name the species. Do not include Eurasian milfoil, reed canarygrass, purple loosestrife, Canadian thistle If you counted: ☒ > 19 species points = 2 ☐ 5 - 19 species points = 1 ☐ < 5 species points = 0 2 H 1.4. Interspersion of habitats Decide from the diagrams below whether interspersion among Cowardin plants classes (described in H 1.1), or the classes and unvegetated areas (can include open water or mudflats) is high, moderate, low, or none. If you have four or more plant classes or three classes and open water, the rating is always high. ☒ None = 0 points ☐ Low = 1 point ☐ Moderate = 2 points All three diagrams in this row are ☐ HIGH = 3points 0 Wetland name or number: Wetland A Wetland Rating System for Western WA: 2014 Update Rating Form – Effective January 1, 2015 8 H 1.5. Special habitat features: Check the habitat features that are present in the wetland. The number of checks is the number of points. ☒ Large, downed, woody debris within the wetland (> 4 in diameter and 6 ft long). ☒ Standing snags (dbh > 4 in) within the wetland. ☒ Undercut banks are present for at least 6.6 ft (2 m) AND/OR overhanging plants extends at least 3.3 ft (1 m) over a stream (or ditch) in, or contiguous with the wetland, for at least 33 ft (10 m). ☐ Stable steep banks of fine material that might be used by beaver or muskrat for denning (> 30 degree slope) OR signs of recent beaver activity are present (cut shrubs or trees that have not yet weathered where wood is exposed). ☒ At least ¼ ac of thin-stemmed persistent plants or woody branches are present in areas that are permanently or seasonally inundated (structures for egg-laying by amphibians). ☒ Invasive plants cover less than 25% of the wetland area in every stratum of plants (see H 1.1 for list of strata). 5 Total for H 1 Add the points in the boxes above 10 Rating of Site Potential If score is: ☐15-18 = H ☒7-14 = M ☐0-6 = L Record the rating on the first page H 2.0. Does the landscape have the potential to support the habitat functions of the site? H 2.1. Accessible habitat (include only habitat that directly abuts wetland unit). Calculate: % undisturbed habitat + [(%moderate and low intensity land uses)/2] = 1% + (0%/2) = 0.5% If total accessible habitat is: ☐ > 1/3 (33.3%) of 1 km Polygon points = 3 ☐ 20-33% of 1 km Polygon points = 2 ☐ 10-19% of 1 km Polygon points = 1 ☐ < 10% of 1 km Polygon points = 0 0 H 2.2. Undisturbed habitat in 1 km Polygon around the wetland. Calculate: % undisturbed habitat + [(%moderate and low intensity land uses)/2 = 35% + (4%/2) = 37% ☐ Undisturbed habitat > 50% of Polygon points = 3 ☐ Undisturbed habitat 10-50% and in 1-3 patches points = 2 ☐ Undisturbed habitat 10-50% and > 3 patches points = 1 ☐ Undisturbed habitat < 10% of 1 km Polygon points = 0 2 H 2.3. Land use intensity in 1 km Polygon: If ☒ > 50% of 1 km Polygon is high intensity land use points = (- 2) ☐ ≤ 50% of 1 km Polygon is high intensity points = 0 -2 Total for H 2 Add the points in the boxes above 0 Rating of Landscape Potential If score is: ☐4-6 = H ☐1-3 = M ☒< 1 = L Record the rating on the first page H 3.0. Is the habitat provided by the site valuable to society? H 3.1. Does the site provide habitat for species valued in laws, regulations, or policies? Choose only the highest score that applies to the wetland being rated. Site meets ANY of the following criteria: points = 2 ☒ It has 3 or more priority habitats within 100 m (see next page) ☐ It provides habitat for Threatened or Endangered species (any plant or animal on the state or federal lists) ☐ It is mapped as a location for an individual WDFW priority species ☐ It is a Wetland of High Conservation Value as determined by the Department of Natural Resources ☐ It has been categorized as an important habitat site in a local or regional comprehensive plan, in a Shoreline Master Plan, or in a watershed plan ☐ Site has 1 or 2 priority habitats (listed on next page) within 100 m points = 1 ☐ Site does not meet any of the criteria above points = 0 2 Rating of Value If score is: ☒2 = H ☐1 = M ☐0 = L Record the rating on the first page Wetland name or number: Wetland A Wetland Rating System for Western WA: 2014 Update Rating Form – Effective January 1, 2015 9 WDFW Priority Habitats Priority habitats listed by WDFW (see complete descriptions of WDFW priority habitats, and the counties in which they can be found, in: Washington Department of Fish and Wildlife. 2008. Priority Habitat and Species List. Olympia, Washington. 177 pp. http://wdfw.wa.gov/publications/00165/wdfw00165.pdf or access the list from here: http://wdfw.wa.gov/conservation/phs/list/) Count how many of the following priority habitats are within 330 ft (100 m) of the wetland unit: NOTE: This question is independent of the land use between the wetland unit and the priority habitat. ☐ Aspen Stands: Pure or mixed stands of aspen greater than 1 ac (0.4 ha). ☐ Biodiversity Areas and Corridors: Areas of habitat that are relatively important to various species of native fish and wildlife (full descriptions in WDFW PHS report). ☐ 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 8 trees/ac (20 trees/ha ) > 32 in (81 cm) dbh or > 200 years of age. Mature forests – Stands with average diameters exceeding 21 in (53 cm) dbh; crown cover may be less than 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: Woodland stands of pure oak or oak/conifer associations where canopy coverage of the oak component is important (full descriptions in WDFW PHS report p. 158 – see web link above). ☒ 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 – see web link above). ☒ Instream: The combination of physical, biological, and chemical processes and conditions that interact to provide functional life history requirements for instream fish and wildlife resources. ☐ Nearshore: 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 WDFW report – see web link on previous page). ☐ 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 25 ft (7.6 m) high and occurring below 5000 ft elevation. ☐ Talus: Homogenous areas of rock rubble ranging in average size 0.5 - 6.5 ft (0.15 - 2.0 m), 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 > 20 in (51 cm) in western Washington and are > 6.5 ft (2 m) in height. Priority logs are > 12 in (30 cm) in diameter at the largest end, and > 20 ft (6 m) long. Note: All vegetated wetlands are by definition a priority habitat but are not included in this list because they are addressed elsewhere. Wetland name or number: Wetland A Wetland Rating System for Western WA: 2014 Update Rating Form – Effective January 1, 2015 10 CATEGORIZATION BASED ON SPECIAL CHARACTERISTICS Wetland Type Check off any criteria that apply to the wetland. Circle the category when the appropriate criteria are met. Category SC 1.0. Estuarine wetlands Does the wetland 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= Not an estuarine wetland SC 1.1. Is the wetland within a National Wildlife Refuge, National Park, National Estuary Reserve, Natural Area Preserve, State Park or Educational, Environmental, or Scientific Reserve designated under WAC 332-30-151? ☐Yes = Category I ☐No - Go to SC 1.2 Cat. I SC 1.2. Is the wetland unit at least 1 ac in size and meets at least two of the following three conditions? ☐ The wetland is relatively undisturbed (has no diking, ditching, filling, cultivation, grazing, and has less than 10% cover of non-native plant species. (If non-native species are Spartina, see page 25) ☐ At least ¾ 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 two of the following features: tidal channels, depressions with open water, or contiguous freshwater wetlands. ☐Yes = Category I ☐No= Category II Cat. I Cat. II SC 2.0. Wetlands of High Conservation Value (WHCV) SC 2.1. Has the WA Department of Natural Resources updated their website to include the list of Wetlands of High Conservation Value? ☒Yes – Go to SC 2.2 ☐No – Go to SC 2.3 SC 2.2. Is the wetland listed on the WDNR database as a Wetland of High Conservation Value? http://www.dnr.wa.gov/NHPwetlandviewer ☐Yes = Category I ☒No = Not a WHCV SC 2.3. Is the wetland in a Section/Township/Range that contains a Natural Heritage wetland? http://file.dnr.wa.gov/publications/amp_nh_wetlands_trs.pdf ☐Yes – Contact WNHP/WDNR and go to SC 2.4 ☐No = Not a WHCV SC 2.4. Has WDNR identified the wetland within the S/T/R as a Wetland of High Conservation Value and listed it on their website? ☐Yes = Category I ☐No = Not a WHCV Cat. I SC 3.0. Bogs Does the wetland (or any part of the unit) meet both the criteria for soils and vegetation in bogs? Use the key below. If you answer YES you will still need to rate the wetland based on its functions. SC 3.1. Does an area within the wetland unit have organic soil horizons, either peats or mucks, that compose 16 in or more of the first 32 in of the soil profile? ☐Yes – Go to SC 3.3 ☒No – Go to SC 3.2 SC 3.2. Does an area within the wetland unit have organic soils, either peats or mucks, that are less than 16 in deep over bedrock, or an impermeable hardpan such as clay or volcanic ash, or that are floating on top of a lake or pond? ☐Yes – Go to SC 3.3 ☒No = Is not a bog SC 3.3. Does an area with peats or mucks have more than 70% cover of mosses at ground level, AND at least a 30% cover of plant species listed in Table 4? ☐Yes = Is a Category I bog ☐No – Go to SC 3.4 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 in deep. If the pH is less than 5.0 and the plant species in Table 4 are present, the wetland is a bog. SC 3.4. Is an area with peats or mucks forested (> 30% cover) with Sitka spruce, subalpine fir, western red cedar, western hemlock, lodgepole pine, quaking aspen, Engelmann spruce, or western white pine, AND any of the species (or combination of species) listed in Table 4 provide more than 30% of the cover under the canopy? ☐Yes = Is a Category I bog ☐No = Is not a bog Cat. I Wetland name or number: Wetland A Wetland Rating System for Western WA: 2014 Update Rating Form – Effective January 1, 2015 11 SC 4.0. Forested Wetlands Does the wetland have at least 1 contiguous acre of forest that meets one of these criteria for the WA Department of Fish and Wildlife’s forests as priority habitats? If you answer YES you will still need 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/ac (20 trees/ha) that are at least 200 years of age OR have a diameter at breast height (dbh) of 32 in (81 cm) or more. ☐ Mature forests (west of the Cascade Crest): Stands where the largest trees are 80- 200 years old OR the species that make up the canopy have an average diameter (dbh) exceeding 21 in (53 cm). ☐Yes = Category I ☒No = Not a forested wetland for this section Cat. I SC 5.0. Wetlands in Coastal Lagoons 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, less frequently, rocks ☐ The lagoon in which the wetland is located contains ponded 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 measured near the bottom) ☐Yes – Go to SC 5.1 ☒No = Not a wetland in a coastal lagoon SC 5.1. Does the wetland meet 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 aggressive, opportunistic plant species (see list of species on p. 100). ☐ At least ¾ of the landward edge of the wetland has a 100 ft buffer of shrub, forest, or un-grazed or un- mowed grassland. ☐ The wetland is larger than 1/10 ac (4350 ft2) ☐Yes = Category I ☐No = Category II Cat. I Cat. II SC 6.0. Interdunal Wetlands Is the wetland west of the 1889 line (also called the Western Boundary of Upland Ownership or WBUO)? If you answer yes you will still need to rate the wetland based on its habitat functions. 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 115 and SR 109 ☐Yes – Go to SC 6.1 ☒No = not an interdunal wetland for rating SC 6.1. Is the wetland 1 ac or larger and scores an 8 or 9 for the habitat functions on the form (rates H,H,H or H,H,M for the three aspects of function)? ☐Yes = Category I ☐No – Go to SC 6.2 SC 6.2. Is the wetland 1 ac or larger, or is it in a mosaic of wetlands that is 1 ac or larger? ☐Yes = Category II ☐No – Go to SC 6.3 SC 6.3. Is the unit between 0.1 and 1 ac, or is it in a mosaic of wetlands that is between 0.1 and 1 ac? ☐Yes = Category III ☐No = Category IV Cat I Cat. II Cat. III Cat. IV Category of wetland based on Special Characteristics If you answered No for all types, enter “Not Applicable” on Summary Form N/A Wetland Rating System for Western WA: 2014 Update Rating Form – Effective January 1, 2015 12 Wetland name or number: A This page left blank intentionally Features depicted are not to scale. Sketches are based on available data and best professional judgment. Wetland B not applicable to this project. Wetland Figures - 1 WETLAND A (DEPRESSIONAL) Figure 1. Cowardin plant classes – D1.3, H1.1, H1.4 I Features depicted are not to scale. Sketches are based on available data and best professional judgment. Wetland B not applicable to this project. Wetland Figures - 2 Figure 2. Hydroperiods, outlet(s), and 150-ft area – D1.1, D1.4, H1.2, D2.2, D5.2 I Outlet Outlet Features depicted are not to scale. Sketches are based on available data and best professional judgment. Wetland B not applicable to this project. Wetland Figures - 3 Figure 3. Map of the contributing basin for Wetland A – D4.3, D5.3 I Features depicted are not to scale. Sketches are based on available data and best professional judgment. Wetland B not applicable to this project. Wetland Figures - 4 Figure 6. Undisturbed habitat and moderate-low intensity land uses within 1 km from wetland edge including polygon for accessible habitat – H2.1, H2.2, H2.3 I Features depicted are not to scale. Sketches are based on available data and best professional judgment. Wetland B not applicable to this project. Wetland Figures - 5 Figure 7. Screen-capture of 303(d) listed waters in basin – D3.1, D3.2 Wetland Units, drain south Features depicted are not to scale. Sketches are based on available data and best professional judgment. Wetland B not applicable to this project. Wetland Figures - 6 Figure 8. Screen-capture of TMDL map – D3.3 Wetland Units