10200 19TH AVE SE Geotech Report 2018-01-02 MF Import

. � , • REPORT GEOTECIiNICAL ENGINEERING SERVICES PROPOSED COSTCO WHOLESALE WAREHOUSE � EVERETT, WASHINGTON FOR ` COSTCO WHOLESALE 1 INTRODUCTION � � 'il�is repoR presents the resulGc of our geotechnical engineering services for the proposed � ' Costco Wholesale site to be located between 19th Avenue Southeast (SR 527) and Interstate 5 aear lOSth Street Southeast in Everett, W�shington. The location of the siu and the gena�al configuration of the property aze shown on the Vicinity Map and the Site Plan, Figures 1 and 2, respectively. ' Our understanding of the project is based on discussions with and site inforni�tion provided � by Mr. Chandler Stever with the Malvanny Partnership. The proposed development consists of an approximately 156,000-squaze-foot Costco wazehouse along the west side of the property,and , the remainder of the site will be for pazking, landscaping, and storm water management. 14e ' understand the wazehouse will be of steel frame and meta] clad construction. Design loads for � �� the proposed waze,tiouse aze expec;ted to include wall loads on the order of 3 klf (kips per � lineaz foot), column loads on the order of 100 kips, and floor loads up to 500 psf(pounds per I ' square foot). Finished fleor elevation for the warehouse will be at Elevation 570 feet, which will � require cuts on the order of 10 feet along the south side of the �roposed building footprint and ' fills up to 6 feet in height near the noitheast corner of the building fuc;forint. Preliminary p12ns 1 , indicate that storm water witl be managed with the use of detentic�n and water quality ireatment ponds. 11�ese ponds wiU be locatefl south of the proposed building footpeint as noted �n Figure 2. • Several small wetland azeas have been identified on the site. hiost of these wetland azeas will be left in-place and enhanced with the development as proposed. However, two wetland azeas near ti�e northern mazgin of the property and one near the northwest corner of the proposed building footprint a� •:� be filled. SCOPE The purpose of this study is to provide design level geotechnical information for development of the proposed Costco Wholesale project. Our specific scop:of services includes the following tasks: 1. Explure the subsur:acs soil and ground water conditions across the site by eaccavaring 12 test pits to depths ranging from 4 to 12 feet with a rubber-tired bac.khoe. 2. Evaluate pertinent physical and engineerir.g chazacteristics of the foundation soils bazed on � � laboratory tescs performe,i on samples obiained frem the test pits. G c o E n y i n e e r � 1 Fle No.0975-0l7•R73J062997