1427 100TH ST SW 2025-03-03 - Laserfiche WebLink

HUITTZOLLARS HUITT-ZOLLARS,INC. • 1102 Broadway,Suite 301 . Tacoma,WA 98402 . 253.627.9131 phone • 253.627.4730 fax . huitt-zollars.com surface (PGIS) and 1,662 SF of replaced (PGIS), but treatment is not required because the threshold of new hard surface for Minimum Requirements 6-9 is not exceeded. Table 1: Existing Conditions and Proposed Land Use i Project Area Only) Existing Conditions Proposed Conditions Land Use and Cover Area Area (AC) Area (SF) Area (AC) (SF) Asphalt Pavement 3581 0.08 4827 0.11 Landscape 4334 0.10 3266 0.08 Sidewalk 801 0.02 623 0.01 Total Area 8716 0.20 8716 0.20 Total Hard Surface 4382 0.10 7,140 0.16 Total New and Replaced HS - - 3852 0.09 Total Pervious Surface 4334 0.10 3266 0.07 Percent Hard Surface 50.3% - 81.9% - Soils According to the NRCS Web Soil Survey(see Appendix B), the soil is Alderwood-Urban land complex which is described as gravelly ashy sandy loam with a very low to moderately low infiltration rate of 0.06 in/hr. Depth to water table is about 18 to 36 inches. Note these are general attributes of the soil, which may have been altered at the site by previous grading.The characterization is considered adequate for purposes of determining the infeasibility of the infiltration-based LID BMPs. No flow control or water quality control facilities that might require more detailed soils information are required for the project. Existing Drainage System: Existing catch basins along the west edge of the park entrance drive and the west corner of the park entrance drive and 100th St SW collect entrance drive runoff and connect to an existing City 12" drain line running east-west adjacent to 1001h St SW. Fairway Estates MHC Entry Huitt-Zollars Stormwater Drainage Report December 15,2023 Everett,Washington Page 4