1728 100TH ST SW 2024-01-04 - Laserfiche WebLink

EXECUTIVE SUMMARY The data provided in this Drainage Report will be included as a part of the Stormwater Site Plan ' and Stormwater Pollution Prevention Plan (SWPPP). This additional technical information is provided for the purpose of evaluating the proposed new development and to comply with the requirements set by the Everett Municipal Code (14.28) and the 2019 Stormwater Management Manual for Western Washington (SMMWW). The project site is located on the southeast corner of the intersection of Dakota Way and 100`h Street Southwest in Everett. Washington. within City of Everett limits. The project site is approximately 0.53 acres and has ground slopes that range from 2% to 8% to the south. There are no existing buildings on the parcel. Swamp Creek passes through the southeastern portion of the property via an existing enclosed pipe. The parcel is covered in lawn. On -site soils in the area of development are consistent with Alderwood-Urban land complex. On - site stormwater appears to sheet flow and infiltrate into the existing native vegetated areas. The proposed project consists of construction of two single-family residences (SFR, f3,420 sf w/overhang) with two asphalt driveways (f600 st) and two concrete parking areas (f535 st). The proposed development will be located in the northern portion of the site. Stormwater runoff from the proposed SFRs will use a dispersion trench, and stormwater from the proposed driveways will use sheet flow dispersion. Due to the type of soil on site, together with other Best Management Practices (BMP) used on this proposed project, it is expected to meet the intent to provide both flow control and stormwater treatment. For additional detail and information refer to the content and body of this report.