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HomeMy WebLinkAboutEx19_Wetland Reconnaissance April 30, 2018 AOA-5661 Eric Uebelhor Arco Murray 3110 Woodcreek Drive Downers Grove, IL 60515 SUBJECT: Wetland Reconnaissance for Renton Landing Parcel 088661-0010 Renton, WA Dear Eric: On April 24, 2018 I conducted a wetland 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). The primary purpose of the reconnaissance was to review two areas within the northern portion of the site that are mapped as wetland on the City of Renton’s GIS mapping. These areas are not depicted on the National Wetlands Inventory mapping. Prior to the reconnaissance, a historical aerial review of the property was conducted. Based on this review, the site was developed with a Boeing manufacturing facility and associated parking up until about 2006. The 2006 aerial photo from the City of Renton clearly indicates that the areas currently mapped as wetland were located within the old building footprint. As you know, the large structure has since been removed and the site is currently vacant with the exception of remnant parking and foundation areas. At the time of my reconnaissance no native soils were observed and the entire property consisted of compacted fill vegetated primarily with periodically mowed grasses and low weeds typical of heavily disturbed mesic environments. The areas mapped as wetland by the City currently consist of shallow isolated topographic depressions that were created during the demolition of the building and subsequent site grading. During periods of heavy precipitation it appears that surface water collects on top of the compacted fill within these depressions. Eric Uebelhor April 30, 2018 Page 2 The City of Renton regulates wetlands per Renton Municipal Code 4-3-050. According to RMC 4-3-050.B.1.f, regulated 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. It is very obvious that the structure was intentionally removed and the areas currently mapped as wetlands by the City are located within the previous nonwetland building footprint. Since the subsequent re-grading of the site after the building demolition was also presumably intentional, the areas mapped as wetland should not be regulated as critical areas and are simply remnant depressions within the demolished building footprint. Conclusion There are no critical areas on the subject property. It is my recommendation that the non-regulatory status of the remnant depressions created as part of the building demolition be approved by the City prior to any detailed site planning. If you have any questions regarding the reconnaissance, please give me a call. Sincerely, ALTMANN OLIVER ASSOCIATES, LLC John Altmann Ecologist King County, King County, Aerials Express 2005 Aerial Date: 4/30/2018 Notes: ±The information included on this map has been compiled by King County staff from a variety of sources and is subject to changewithout notice. King County makes no representations or warranties, express or implied, as to accuracy, completeness, timeliness,or rights to the use of such information. This document is not intended for use as a survey product. King County shall not be liablefor any general, special, indirect, incidental, or consequential damages including, but not limited to, lost revenues or lost profitsresulting from the use or misuse of the information contained on this map. Any sale of this map or information on this map isprohibited except by written permission of King County. 4,514 376 2006 City of Renton GIS Mapping 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 4/30/2018 Legend 2560128 THIS MAP IS NOT TO BE USED FOR NAVIGATION Feet Notes 256 WGS_1984_Web_Mercator_Auxiliary_Sphere Information Technology - GIS RentonMapSupport@Rentonwa.gov City and County Boundary Addresses Parcels Environment Designations Natural Shoreline High Intensity Shoreline Isolated High Intensity Shoreline Residential Urban Conservancy Jurisdictions Streams (Classified) Type S Type F Type Np Type Ns Wetlands 4,514 376 2007 City of Renton GIS Mapping 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 4/30/2018 Legend 2560128 THIS MAP IS NOT TO BE USED FOR NAVIGATION Feet Notes 256 WGS_1984_Web_Mercator_Auxiliary_Sphere Information Technology - GIS RentonMapSupport@Rentonwa.gov City and County Boundary Addresses Parcels Environment Designations Natural Shoreline High Intensity Shoreline Isolated High Intensity Shoreline Residential Urban Conservancy Jurisdictions Streams (Classified) Type S Type F Type Np Type Ns Wetlands King County, Pictometry, King County 2009 Aerial Date: 4/30/2018 Notes: ±The information included on this map has been compiled by King County staff from a variety of sources and is subject to changewithout notice. King County makes no representations or warranties, express or implied, as to accuracy, completeness, timeliness,or rights to the use of such information. This document is not intended for use as a survey product. King County shall not be liablefor any general, special, indirect, incidental, or consequential damages including, but not limited to, lost revenues or lost profitsresulting from the use or misuse of the information contained on this map. Any sale of this map or information on this map isprohibited except by written permission of King County. 4,514 376 2015 City of Renton GIS Mapping 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 4/30/2018 Legend 2560128 THIS MAP IS NOT TO BE USED FOR NAVIGATION Feet Notes 256 WGS_1984_Web_Mercator_Auxiliary_Sphere Information Technology - GIS RentonMapSupport@Rentonwa.gov City and County Boundary Addresses Parcels Environment Designations Natural Shoreline High Intensity Shoreline Isolated High Intensity Shoreline Residential Urban Conservancy Jurisdictions Streams (Classified) Type S Type F Type Np Type Ns Wetlands Renton Landing NWI Mapping U.S. Fish and Wildlife Service, National Standards and Support Team,wetlands_team@fws.gov Wetlands Estuarine and Marine Deepwater Estuarine and Marine Wetland Freshwater Emergent Wetland Freshwater Forested/Shrub Wetland Freshwater Pond Lake Other Riverine April 30, 2018 0 0.08 0.160.04 mi 0 0.1 0.20.05 km 1:4,735 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.