1921 W MUKILTEO BLVD 2018-01-02 MF Import

C1001-o10 NGA Main Office 17311 —135" Avenue NE, A-500 Woodinville, WA 98072 (425) 486-1669 FAX (425) 481.2510 (425) 337.1669 Snohomish County DATE: January 28, 2010 TO: Dan Kure NELSON GEOTECHNICAL ASSOCIATES, INC. GEOTECHNICAL ENGINEERS & GEOLOGISTS Engsneering-Geology Smnch 437 East Penny Road Wenatchee, WA 98801 (509) 665-7696 FAX (509) 665-7692 MEMORANDUM CC: Fred Baxter — Fred Baxter and Associates Architecture Alex Moroseos — Custom Design Engineering FROM: Michael D. RundgWst, PE RE: 1921 Muldlteo Boulevard Building Setback Recommendations Everett, Washington NGA Pile No. 823310 This mcmomndum documents our recommendations regarding the building setbacks for the planned Kure residence project at 1921 MukUteo Boulevard in Everett, Washington. We prepared a gcotcchnical engineering report for the site dated October 20, 2005. Based upon the conditions observed at the site, the site slope is considered stable with respect to deep- seated failures. However, there is a potential for shallow sloughing and erosion events to occur on the steeper portions of the slope. We recommended that the residence foundations be designed to provide an effective setback of at least 35 feet from the top of the steep slope. We also recommend that a light structure setback of 25 feet from the top of the steep slope be established for lightly loaded structures such as the porch roof columns and the small landscaping walls that are planned along the north side of the residence. The northern footing line of the residence, the porch columns, and the landscaping walls should be supported on medium dense or better native soil at least three feet below the finished ground surface. Our explorations indicated that the competent native soil might be encountered at approximately five feet below grade at the time of our site work. EndE-+-E-