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C E C7 Grou • Northwest Inc• GeatceEn Engineers,Geologists <br /> & <br /> b: Environmental Specialists <br /> 41—z t AS 3 7 4t-S <br /> October 4,2017 G-4400 <br /> Mr. Edward Koltonowski <br /> 2514 -51s`Street SW <br /> Everett, WA 98203 <br /> Subject: Geotechnical Final Inspection Letter <br /> Permit No.:B 1707-050 <br /> Project Address: 2514- 51"Street SW, Everett, WA <br /> Description:Underpin the northeast portion of the house foundation with 3"diameter push <br /> piers. <br /> Mr. Koltonowski, <br /> • <br /> This is our final geotechnical inspection letter, as requested by the City of Everett. A total of eight(8) <br /> 3-inch diameter push piers were installed by Innovative Foundation Solutions(IFS)to underpin the <br /> northeastern corner of the house foundation for the purpose of stabilizing and lifting to relevel the <br /> foundation. The foundation had settled about 34". <br /> Wade Lassey with GEO Group Northwest, Inc.,was at the site and inspected the pier installation and <br /> recorded the pier load test. Based on our observations the piers and the foundation brackets were <br /> installed in accordance with the project plans and specifications and are acceptable. The piers were <br /> individually installed to either a maximum installation pressure of 6000 psi(34,200 equivalent lbs) or <br /> until the house foundation started to lift. After installing all the piers, the foundation in the northeast <br /> corner was lifted and releveled. <br /> Attached is the field report with the recorded pier installation pressures and pier depths. A quick load <br /> test was performed in accordance with ASTM D1143-81 on pier#1 to 200 percent of the design load <br /> of 12,500 lbs and the load test passed. The load test data sheet is attached. <br /> 13705 Bel-Red Road - Bellevue, Washington 98005 <br /> Phone 425/649-8757 Fax 435/649-8758 <br />