2202 100TH ST SW 2023-02-07 - Laserfiche WebLink

Stephens Property Critical Areas Report and Mitigation Plan dominant species in the understory (Photo 1). Few conifers exist on the Site, and overall species diversity is low. Invasive species are a relatively small component of the Site, but Himalayan blackberry is dense at the perimeters of the Site, particularly at the northeast edge of the Site. An existing drainage issue occurs in the northwest corner of the Site where road runoff is being discharged directly onto the Site both as runoff from the adjacent roads as well as through a pipe (Photos 2 & 3). The adjacent roads lack curb, gutter, sidewalk, drainage, or any similar infrastructure that would detain surface water from these pollution -generating surfaces. This untreated road runoff is being directly discharged onto the Site where this water has made its path towards the onsite wetlands. Photo 2. Edge of the property along 100th Street SW showing lack of curb. In addition to the lack of proper curbs that might prevent surface runoff from the adjacent roads from entering the Site, a pipe exists in the northwest corner of the Site that provides a direct source of water onto the Site. A swale exists that generally conveys this water towards the onsite wetlands. Conversations with the Applicant indicate that the City of Everett is aware of this stormwater issue in the northwest corner of the Site and have previously acknowledged that public roads are the source of the unmanaged stormwater discharges onto the Site. This water has caused the northern edge of the Site to be quite damp, particularly in the winter months, though no wetland or stream conditions have been indicated in these areas. 6 March 2020 Copyright © 2020 Talasaea Consultants, Inc. 1807 CAR V4 Page 3