1517 132ND ST SE 2024-12-09 - Laserfiche WebLink

2.0 EXISTING CONDITIONS SUMMARY Pre-Developed Site Conditions The site is currently developed with an asphalt parking lot. Topography The site is relatively flat with slopes less than 5%. Land Cover The site is developed and primarily covered with hard surface and landscaping. Adjacent Land Uses The site is bounded as follows: North: Retail, Zoned B - Business West: Jack-in-the-Box (Restaurant, Zoned B - Business) East: Fred Meyer (Department Store, Zoned B - Business) South: 132nd Street SE/SR 96 (Public Right-of-Way) Native Soils The United States Department of Agriculture Natural Resource Conservation Service (NRCS) identifies Alderwood-Urban land complex (5) underlying most of the project site. This soil is identified as part of the hydrologic soil group B which is conducive to infiltration. Groundwater is noted typically at depths between 18-36 inches. McKenna gravelly silt loam (32) is also identified on a portion of the site. This soil is in hydrologic soil group D. Groundwater is noted typically at depths between 0-6 inches. A geotechnical report for this site is provided by Pangeo. This report can be found in Appendix B. The following is their characterization of the infiltration capabilities of the site: "The native soils underlying the site consist of Vashon till, a dense to very dense deposit comprised of clay, silt, sand, and gravel. Till is generally not a suitable receptor soil for infiltration due to the high fines content and density. Where loosened by weathering infiltration rates of about 1/2 inch per hour may be obtained. Where unweathered, infiltration rates are typically less than 1/4 inch per hour. Perched groundwater, which can limit infiltration, also develops in till soils during wet season at the transition from weathered to unweathered soils. In summary, it is our opinion that non-infiltration alternatives should be considered to manage the surface runoff at the site." Drainage Patterns Currently stormwater runoff is collected by catch basins in the parking lot and routed northeast through the private drainage system. Critical and Sensitive Areas Per City of Everett GIS, there is a wetland on the northern portion of the site. However, this area is fully developed. There does appear to be a wetland to the east of the subject parcel, across the access road.