2802 HOYT AVE EVERETT ELKS Geotech Report 2018-01-02 MF Import

RC_7C`4-C-q( N A Main Office 17311 _ 135' Avenue NE, A-500 Woodinville, WA 98072 (425) 486-1669 • FAX (425) 481-2510 (425) 337-1669 Snohomish County November 2, 2006 Adam Clark Gary Parkinson Architects 2812 Colby Avenue Everett, WA 98201 NELSON GEOTECHNICAL ASSOCIATES, INC. GEOTECHNICAL ENGINEERS & GEOLOGISTS Geotechnical Engineering Evaluation Everett Elks Club Everett, Washington NGA File No. 751106 Engineering -Geology branch 112 Olds Staticn Road, Suite C Wenatchee, WA 98801 (509) 665-7696 (Phone/Fax) Dear Mr. Clark: We are pleased to submit the attached report titled "Geotechni al Engineering Evaluation — Everett Elks Club — Everett, Washington." This report summarizes the existing surface and subsurface conditions within the project site and provides general recommendations for the proposed site development. Our services were completed in general accordance with the proposal signed by Gary Parkinson on September 26, 2006. The site is currently occupied by an existing multi -story building that was damaged in a previous fire. Development for this property is planned to consist of the removal of the existing building and the construction of a five -story mixed -use building with underground parking, as well as a sky bridge that will connect the new building to an existing parking garage across the street to th cast. The wall associated with the underground garage will be approximately 10 feet high. Stormwater is planned to he directed to an existing system. We monitored the drilling of three borings adjacent to the existing building. Based on our explorations we anticipate that the site is underlain by competent native glacial material. We have concluded that the site is generally compatible with the planned development. The main geotechnical issue with this project is the tall cut walls associated with the planned underground garage, and maintaining cut stability during construction. We have recommended installing a shoring wall to maintain cut stability. However, it is our understanding that the existing retaining walls for the damaged building may be incorporated into the new building. General recommendations for shoring system design and construction are provided in this report, however, further discussions with your structural engineer will be needed as the shoring system design evolves. We have recommended that the new structure be founded on the native medium dense or better soil for bearing capacity and settlement considerations. In the attached report, we also present general recommendations for site grading and drainage. — --