5910 LARIMER RD 2018-01-02 MF Import

Van Derheken and Keck Properties Geotechnica! Services Report Lorimer Road Everett Washington Due to extreme wet weather conditions and saturation of near surface clay soils it was decided to not excavate the site soils and install the lagging between the soldier piles at this time. When the soils are excavated for the lagging, in order to reduce costs, they will be placed and compacted behind the soldier pile wall instead of importing more suitable soils to the site. Under the current weather conditions most of the excavated soils are too wet to be placed and compacted in any manner. Therefore, the owner is to recover the area of the landslide with plastic sheeting and monitor the landslide to verify that installation of the soldier piles and plastic sheeting has stopped all movement. If movement is stopped the excavating and lagging will be delayed until drier conditions prevail. If movement is not stopped the excavating and lagging should proceed immediately. The wall was to be located in the approximate middle of the two rockeries in order balance the cut and fill required on the site. Due to access difficulties McDowell required that the wall be moved closer to the upper rockery. lltis may result in the need to export some of the excavated material when the lagging is installed. Based upon inspection of the contractor's operations it is our opinion that the soldier pile installations were completed in accordance with the structural engineering desibm for the project. Once conditions improve to the point where the excavation and lagging can proceed, this office should be contacted to schedule further inspection of this work. Respectfully submitted, Gary1A.Fwers, P.G., P.E.G. Principal Engineering Geologist Gary A. Flowers, PLLC. 19532 IP Avenuc NE Shoreline, Washington 98155.1106 206-417.7640 El