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Home My WebLink About24-RS_Wetland_Reconnaissance_210805_v1.pdf August 5, 2021 AOA-6526 Rev. Cynthia Meyer rev.cynthiameyer@gmail.com SUBJECT: Updated Wetland Reconnaissance for United Christian Church Property Located at 15509 -116th Ave SE, Renton, WA Parcel 202305-9067 Dear Pastor Cynthia: On May 25, 2021, I conducted an initial wetland reconnaissance on and adjacent to the subject property utilizing the methodology outlined in the May 2010 Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Western Mountains, Valleys, and Coast Region (Version 2.0). No jurisdictional wetlands were observed on or adjacent to the site during the field investigation. An additional site review and meeting with City staff was conducted on July 8, 2021 to confirm the no wetlands determination. 1.0 BACKGROUND REVIEW Prior to conducting the wetland reconnaissance, the following existing mapping sources were reviewed. • National Wetlands Inventory Mapping (Attachment 1) does not indicate the presence of any wetlands on or adjacent to the site. • The WA Department of Fish and Wildlife’s Priority Habitats and Species (PHS) data (Attachment 2) does not indicate the presence of any wetlands or other Priority Habitats or Species on or adjacent to the site. • The Natural Resource Conservation Service (NRCS) mapping (Attachment 3) indicates the entire undeveloped portion of the site as comprised of Alderwood Gravelly Sandy Loam (AgC), which is a non-hydric soil. • King County iMAP (Attachment 4) does not indicate the presence of any wetlands or streams on the property. Rev. Cynthia Meyer August 5, 2021 Page 2 of 4 • City of Renton GIS mapping (Attachment 5) does not indicate the presence of any wetlands or streams on the property. 2.0 EXISTING CONDITIONS The northeastern portion of the site is currently developed with the existing United Christian Church facility and associated parking area. The remainder of the property generally slopes down from east to west and consists of an upland deciduous forest dominated by a canopy of big-leaf maple (Acer macrophyllum) with widely scattered red alder (Alnus rubra), black cottonwood (Populus trichocarpa), and Douglas fir (Pseudotsuga menziesii). Understory and groundcover species included hazelnut (Corylus cornuta), Indian plum (Oemleria cerasiformis), vine maple (Acer circinatum), English holly (Ilex aquifolium), sword fern (Polystichum munitum), and trailing blackberry (Rubus ursinus). No hydrophytic plant communities were observed on or adjacent to the property outside of a small closed depression located just below the parking lot (See Section 2.1 below). Borings taken throughout the site revealed high chroma non-hydric soils and there was no evidence of ponding or prolonged soil saturation anywhere in the vicinity of the property outside of the small closed depression. 2.1 Small Closed Depression During the reconnaissance, a small (i.e., <1,000 s.f.) closed depression was observed just to the west below the parking lot (see Attachment 5). The area was sparsely vegetated but did contain a single Oregon ash (Fraxinus latifolia) sapling as well as scattered salmonberry (Rubus spectabilis) and lady fern (Athyrium filix- femina), species often associated with hydrophytic environments. Although dry at the time of the site review, soils within the depression were low chroma and considered hydric. Also, during the site review a stormwater outlet pipe was observed on the slope above the closed depression. This pipe conveys collected stormwater runoff from the developed portion of the site and discharges onto the slope above the depression. This runoff collects within the depression and provides artificial hydrologic support. As defined in RMC 4-11-230, wetlands: WETLANDS: Areas that are inundated or saturated by surface water or groundwater at a frequency and duration sufficient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions. Wetlands generally include swamps, marshes, bogs, and similar areas. Wetlands do not include those artificial wetlands intentionally created from nonwetland sites, including, but not limited to, irrigation and drainage ditches, grass-lined swales, canals, detention facilities, wastewater treatment 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 include artificial wetlands created from nonwetland areas to mitigate the conversion of wetlands. Rev. Cynthia Meyer August 5, 2021 Page 3 of 4 Based on this definition, since the topographic depression was intentionally chosen as a receiving area for the artificial stormwater inputs, it should not not be considered a wetland that requires critical area protection. View of outlet drain to closed depression. Conclusion No wetlands or streams are located on or adjacent to the site. This determination is based on a field investigation during which no hydrophytic plant communities, hydric soils, or evidence of wetland hydrology or channels were observed outside of the small stormwater retention/infiltration area on the property. Rev. Cynthia Meyer August 5, 2021 Page 4 of 4 If you have any questions regarding the wetland reconnaissance, please give me a call. Sincerely, ALTMANN OLIVER ASSOCIATES, LLC John Altmann Ecologist Attachments Renton Parcel 2023059067 Source: Esri, Maxar, GeoEye, Earthstar Geographics, CNES/Airbus DS,USDA, USGS, AeroGRID, IGN, and the GIS User Community Wetlands Estuarine and Marine Deepwater Estuarine and Marine Wetland Freshwater Emergent Wetland Freshwater Forested/Shrub Wetland Freshwater Pond Lake Other Riverine June 11, 2021 0 0.06 0.120.03 mi 0 0.1 0.20.05 km 1:3,609 This page was produced by the NWI mapperNational Wetlands Inventory (NWI) This map is for general reference only. The US Fish and Wildlife Service is not responsible for the accuracy or currentness of the base data shown on this map. All wetlands related data should be used in accordance with the layer metadata found on the Wetlands Mapper web site. 6/11/2021 PHS Report 1/1 DISCLAIMER. This report includes information that the Washington Department of Fish and Wildlife (WDFW) maintains in a central computer database. It is not an attempt to provide you with an official agency response as to the impacts of your project on fish and wildlife. This information only documents the location of fish and wildlife resources to the best of our knowledge. It is not a complete inventory and it is important to note that fish and wildlife resources may occur in areas not currently known to WDFW biologists, or in areas for which comprehensive surveys have not been conducted. Site specific surveys are frequently necesssary to rule out the presence of priority resources. Locations of fish and wildlife resources are subject to variation caused by disturbance, changes in season and weather, and other factors. WDFW does not recommend using reports more than six months old. Priority Habitats and Species on the Web Report Date: 06/11/2021, Parcel ID: 2023059067 The Priority Habitats and Species (PHS) datasets do not contain information for your project area. This does not mean that species and habitats do not occur in your project area. PHS data, points, lines and polygons are mapped only when occurrences of these species or habitats have been observed in the field. Unfortunately, we have not been able to comprehensively survey all sections in the state and therefore, it is important to note that priority species and habitats may occur in areas not currently known to the Department. Soil Map—King County Area, Washington Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 6/11/2021 Page 1 of 352569005256940525698052570205257060525710052571405256900525694052569805257020525706052571005257140561050561090561130561170561210561250561290561330561370561410561450 561050 561090 561130 561170 561210 561250 561290 561330 561370 561410 561450 47° 27' 53'' N 122° 11' 24'' W47° 27' 53'' N122° 11' 4'' W47° 27' 45'' N 122° 11' 24'' W47° 27' 45'' N 122° 11' 4'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 10N WGS84 0 50 100 200 300 Feet 0 25 50 100 150 Meters Map Scale: 1:1,900 if printed on A landscape (11" x 8.5") sheet. Soil Map may not be valid at this scale. MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Map Unit Polygons Soil Map Unit Lines Soil Map Unit Points Special Point Features Blowout Borrow Pit Clay Spot Closed Depression Gravel Pit Gravelly Spot Landfill Lava Flow Marsh or swamp Mine or Quarry Miscellaneous Water Perennial Water Rock Outcrop Saline Spot Sandy Spot Severely Eroded Spot Sinkhole Slide or Slip Sodic Spot Spoil Area Stony Spot Very Stony Spot Wet Spot Other Special Line Features Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography The soil surveys that comprise your AOI were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: King County Area, Washington Survey Area Data: Version 16, Jun 4, 2020 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Jul 25, 2020—Jul 27, 2020 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Soil Map—King County Area, Washington Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 6/11/2021 Page 2 of 3 Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI AgC Alderwood gravelly sandy loam, 8 to 15 percent slopes 13.0 90.6% AmC Arents, Alderwood material, 6 to 15 percent slopes 1.3 9.4% Totals for Area of Interest 14.3 100.0% Soil Map—King County Area, Washington Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 6/11/2021 Page 3 of 3 King C ounty, Ea g le View Tec h nol ogies, Inc . Date : 6/11 /20 21 Notes: ±The informati on included on this map has been compi led by King County staff from a variety of sour ces and issubject to change wi thout notice. King County makes no r epresentati ons or w ar ranties, expr ess or impl ied,as to accurac y, completenes s, timeli ness , or ri ghts to the use of such infor mation. This document is not intendedfor use as a s urvey pr oduct. King County shall not be liable for any gener al, s pecial, i ndir ect, incidental , orconsequential damages incl uding, but not li mited to, lost revenues or lost pr ofits resulting fr om the use or misuseof the information contained on this map. Any sale of this map or infor mati on on this map is pr ohibited except bywritten per mi ssi on of Ki ng County. Kin g C ounty iM ap 2,257 188 City of Renton Print map Template This map is a user generated static output from an Internet mapping site and is for reference only. Data layers that appear on this map may or may not be accurate, current, or otherwise reliable. None 6/11/2021 Legend 128064 THIS MAP IS NOT TO BE USED FOR NAVIGATION Feet Notes 128 WGS_1984_Web_Mercator_Auxiliary_Sphere Information Technology - GIS RentonMapSupport@Rentonwa.gov City and County Labels Addresses Parcels City and County Boundary <all other values> Renton Environment Designations Natural Shoreline High Intensity Shoreline Isolated High Intensity Shoreline Residential Urban Conservancy Jurisdictions Streams (Classified) <all other values> Type S Shoreline Type F Fish Type Np Non-Fish Type Ns Non-Fish Seasonal Unclassified Not Visited Wetlands 2' Primary 2' Intermediate Streets Points of Interest