7609 44TH AVE W 2023-12-28 - Laserfiche WebLink

1.1 SITE DESCRIPTION Access to the subject property is from the north via 81h St. The property is undeveloped, and no buildings or foundations were found. A stormwater pipe was located onsite near the southeast corner of the subject property. This pipe is presumed to be a point discharge from the neighboring property's French drain. Surrounding property use can be described as single- family residential development. Dominant vegetation on-site site is a combination of native shrubs and small trees including Sitka willow and Nootka rose as well as a number of invasive species. A large portion of the property has been invaded with Himalayan blackberry and field bindweed, which has created a dense thicket across the site. Topography of the subject property is generally sloped with a north- northeast aspect and undulations throughout. On-site soils are mapped as Alderwood gravelly sandy loam, 0 to 8 percent slopes. Soils found during the investigation are similar to the above mapped series, and a detailed description is provided in Section 2.0 of this report. One wetland (Wetland A) was found within the boundary of the investigation area. The on-site wetland is a linear sloped feature located on the eastern half of the subject property. Wetland A is 3,432 square feet in size, and is fed by a point discharge from the neighboring property to the south, as well as surface water run-off from surrounding properties. Stormwater moves through Wetland A and discharges into a catch basin immediately down slope, located on the southern side of 81h St. Based on the City of Mukilteo Drainage Maps (Appendix E), this catch basin discharges into a stormwater conveyance line and is detained in a series of subsequent catch basins and drainage facilities further down gradient, before eventually outflowing into the Puget Sound. Wetland A appears to be isolated from other critical areas. No additional wetlands or streams were found on or immediately adjacent to the subject property. The City of Mukilteo provides regulatory guidance on wetland classification within the City's jurisdiction, Wetlands shall be classed as Category I, II, III or IV using the 2014 Washington State Department of Ecology's Wetland Rating System for Western Washington, Publication No. 04-06-025, or as amended hereafter. Identification of wetlands and delineation of their boundaries pursuant to this chapter shall be done in accordance with the approved federal wetland delineation manual and applicable regional supplements. All areas within the city meeting the wetland designation criteria in that procedure are hereby designated critical areas and are subject to the provisions of this chapter. Pursuant to MMC 17.52B.090, Wetland A is classified as a Category IV wetland, with a habitat score of 4. All Category IV wetlands in the City of Mukilteo receive standard 40-foot protective buffers. 1.2 PROJECT DESCRIPTION Terry Mundorf, hereafter referred to as the applicant, is proposing the future development of the property for the construction of a single-family residence and associated infrastructure. Nearly ninety-six percent of the property is encumbered by the subject wetland and associated buffer, save for narrow strip of non-buffer area (437 square feet) along the western property boundary. As such, the on-site wetland and buffer restrict the applicant's economic use of the subject property. As a means of providing a developable lot for a new home to be built at a size Mundorf-8th St 2 Critical Area Study & WRI#16233 Mitigation Plan March 2016