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Home My WebLink AboutEx_06_Wetland_and_Stream_Reconnaissance_Study April 9, 2021 AOA-5884 Bob Wenzl Bob@tuscanywa.com SUBJECT: Wetland Reconnaissance and Stream Study for Day Short Plat 18600 – 116th Ave. SE, Parcels 619780-0080, -0263, and -0265 Renton, WA Dear Bob: On February 7, 2019 I conducted an initial wetland and stream reconnaissance on 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). Additional field investigations were conducted on October 10, 2019 and March 9, 2021. The western portion of Parcel 619780-0080 (18600 – 116th Ave. SE) is currently developed with an existing mobile home and yard area. The remainder of this parcel and the other two parcels are currently undeveloped. Vegetation on the site currently consists primarily of a mixed upland forest that includes black cottonwood (Populus trichocarpa), big-leaf maple (Acer macrophyllum), Douglas fir (Pseudotsuga menziesii), Himalayan blackberry (Rubus armeniacus), hazelnut (Corylus cornuta), Indian plum (Oemleria cerasiformis), sword fern (Polystichum munitum), and English ivy (Hedera helix). No hydrophytic plant communities were observed on the property. City of Renton GIS mapping indicates the presence of one stream (Stream 1) in the northeast corner of Parcel 619780-0265. No wetlands were identified on or immediately adjacent to the property. The stream on the site enters the property from a culvert and drains west to east along the northeast property line. Both the piped and un-piped portions of the stream appear to coincide with a recorded drainage easement for the property. The stream was likely historically ditched but is currently unmaintained. The ordinary high water (OHW) of the channel was delineated on October 10, 2019 and was subsequently surveyed. The stream was dry at the time of the delineation and the culvert was completely submerged at the time of a March 9, 2021 site review. Exhibit 6 RECEIVED 05/26/2023 AMorganroth PLANNING DIVISION DocuSign Envelope ID: 8349A775-7CD5-48E8-9101-6CAB65879B26 Bob Wenzl April 9, 2021 Page 2 Stream 1 meets the criteria for a Type NS stream and requires a standard 50-foot buffer plus 15-foot building setback per RMC 4-3-050.G.2. If you have any questions regarding the reconnaissance or delineation, please give me a call. Sincerely, ALTMANN OLIVER ASSOCIATES, LLC John Altmann Ecologist Attachments DocuSign Envelope ID: 8349A775-7CD5-48E8-9101-6CAB65879B26 K in g C oun ty, EagleVi ew Tec hnol ogies, In c . King C ou n ty iM ap Date: 4 /1/20 2 1 Notes: Th e informatio n in clu de d on this map h as b ee n co mp iled by K in g Co un ty staff f rom a variety o f so urces a nd is subject to chan gewithout n otice . K in g Co unty make s no repre sen tat io ns or warra nt ies, e xpress or imp lie d, as t o a ccuracy, co mplete ne ss, timeline ss,or rig hts to the use o f such inf orma tion . This d ocument is no t inten de d fo r use as a survey p ro du ct. K ing Co un ty sh all no t b e lia blefor a ny gen eral, sp ecia l, ind irect , incidental, o r con seque ntial d ama ges in clud ing, bu t n ot limited to , lost re ven ue s or lost pr o fitsresulting from t he use or misuse of the informa tion con ta ined on th is map. A ny sale o f this map or inf orma tion on this ma p isprohibited except by written p ermission o f K in g Co un ty.± Parcel 619780-0080 Parcel 619780-0263 Parcel 619780-0265 DocuSign Envelope ID: 8349A775-7CD5-48E8-9101-6CAB65879B26 1,128 94 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 4/1/2021 Legend 64032 THIS MAP IS NOT TO BE USED FOR NAVIGATION Feet Notes 64 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 Streets Points of Interest Parks Waterbodies City mapping indicates small stream at northeast corner of Parcel 6197800265 DocuSign Envelope ID: 8349A775-7CD5-48E8-9101-6CAB65879B26 120TH AVENUE SE116TH AVENUE SEPROJECTDRAWNDATESCALEREVISEDLandscapeArchitectureAOAEnvironmentalPlanning &Office (425) 333-4535PO Box 578Carnation, WA 98014Fax (425) 333-4509Altmann Oliver Associates, LLC5884-MIT-03-25-21.dwgParcel 619780-0080Parcel 619780-0263619780-0265Drainage EasementDocuSign Envelope ID: 8349A775-7CD5-48E8-9101-6CAB65879B26