1921 W MUKILTEO BLVD 2018-01-02 MF Import

1 � NGA 17311 — 13r Avenue NE, A•500 Woodinville, WA 98072 (425) 4B6.1669 . (425) Fax 481.2510 IOctober 20, 2005 NELSON GEOTECHNICAL ASSOCIATES, INC. GEOTECHNICAL ENGINEERS & GEOLOGISTS Snohomish County (425) 337-1669 Wenatchee/Chelan (509) 784-2756 Mr. Philip Johnson Cascade Coffee 1525-75th Street SW, #100 ' Everett, WA 98203 Preliminary Geotechnical Engineering Evaluation 1919 Mukilteo Boulevard Everett, Washington NGA File No. 718805 ' Dear Mr. Johnson: We are pleased to submit the attached report titled "Preliminary Geotechnical Engineering Evaluation — 1919 Mukilteo Boulevard — Everett, Washington." This report summarizes the existing surface and subsurface conditions within the site and provides recommendations for the proposed site development. Our services were completed in general accordance with the proposal signed by you on August 5, 2005. The site consists of two lots situated on gently to steeply sloping ground on the north side of Mukilteo Boulevard overlooking Possession Sound. A single-family residence currently occupies the site. A steep slope is located on the northern side of the property. The planned improvements include removal of the existing structures and construction new residence. Plans for the project were not available at the time this report was prepared. We understand that preliminary plans include construction a one-story, 5,000- square-foot, single-family residence on the property. We monitored three geotechnical borings in the area of the proposed residence and near the top of slope. Our explorations indicated that the site is generally underlain by competent native granular soils. It is our opinion that the site is generally compatible with current plans for a new single-family residence, provided that our recommendations are incorporated into the design and construction of the project. It is also our opinion that the soils that underlie the site and form the core of the site slopes should be stable with respect to deep-seated earth movements. Foundations consisting of spread footings could be utilized for the planned residence. The residence foundations should be supported on medium dense or better native soils or structural fill extending to these soils. We recommend that the downslope footing lines be deepened to maintain an effective setback distance of 35 feet between the bottom of the foundation to the face of the steep slope. In the attached report, we have also included general recommendations for site grading, retaining walls, site grading and drainage. Specific plans were not available at the time this report was prepared. Detailed plans will be essential for successful construction on this steeply sloping site. We should be retained to review the final grading, foundation, and drainage plans prior to construction.