8311 UPPER RIDGE RD 2025-07-28 - Laserfiche WebLink

SECTION II: SITE ASSESSMENT Based on the site reconnaissance and the available topography we have the following info: • Topography: The topography of the site shows a 4 to 6-ft fall to the northeast. Refer to the grading plan for more details. • Drainage: The majority of the site drains to the northeast and enters into the neighboring property to follow its natural drainage course and eventually ends up in Merrill and Ring Creek. No existing problems were found and it appears that our proposal will not aggravate any downstream issues. • Soils: Per SCC survey of Snohomish County, the project site contains Alderwood Urban Land Complex 2 to 8 percent. Refer to the attached soil map later in this report. • Ground Cover: The entire site exists as grass with some thick bushes at the northeast corner. The existing home was removed few years ago. • Critical areas: There are no critical areas located within the site. • The property access is from Upper ridge road. The site is located in the residential area with homes located to the west, north and south. To the immediate east is a raw property. SECTION III: ON-SITE STORMWATER MANAGEMENT This refers to on-site stormwater management BMP's in Volume III, Chapter 12 of the City of Everett Stormwater Management Manual. Individual infiltration trenches are proposed to meet BMP 12.30 as outlined in the city of Everett Stormwater Management Plan. The soils are Alderwood soils and per BMP 12.30,the bottom area of the trench shall be 250 SF for 1,000 SF of equivalent impervious area. The proposed units are 1,882 SF each and approximately 470 SF of bottom area is required to meet BMP 12.30. The proposal is to provide an infiltration trench of 40-ft x 12-ft x 2-ft per unit. Driveways will be dispersed through the side yards to follow its natural drainage location. Refer to Sheet C 1.0 for more details. Also, a note has been added to the plans to meet BMP 12.20.