4704 HARBOR LN 2018-01-02 MF Import

-00'00 N GA Main Office 17311 - 135" Avenue NE, A-500 Woodinville. WA 98072 (425) 486.1669 FAX (425) 481-2510 (425) 337-1669 Snohomish County August 21, 2009 Rick and Holly Anderson 4704 Harhorl,life Everett, WA 98203 NELSON GEOTECHNICAL ASSOCIATES, INC. GEOTECHNICAL ENGINEERS & GEOLOGISTS Proposal for Geotcchnical Consultation Services Anderson Landslide Repair Everett, Washington NGA Proposal No. P91280 Dear Rick and Holly: Engineenng-Geology Branch 437 East Penny Road Wenatchee. WA 98801 (509) 665.7696 FAX (509)1365-7692 NELSON GEOTECHNICAL ASSOCIATES, INC. (NGA) is pleased to submit our initial opinions and this proposal for a subsurface geotechnical evaluation and repair recommendations for the landslide that occurred on your property located at 4704 Harbor Lane in Everett, Washington. INTRODUCTION We visited the site on Wednesday, July I and on Friday August 14, 2009 to observe the surficial conditions of a landslide that occurred on your property at the end of June. It is our understanding that a significant water leak also occurred at the front end of the house and tlooded the basement, crawl space, and garage areas around the time of the slide. The landslide occurred on the steep west -facing slopes on the western side of your property. We observed a large exposed scarp starting near the top of the slope, down most of the slope towards the ravine below. An existing swimming pool and small jactizzi are located near die top of slope, and the house is located approximately 25 to 40 feet back from the top of the slope. Evidence of settlement and subsidence was observed at the top of the slope and in the vicinity of the pool. The soils exposed in the slope appeared to be sandy with silt and gravel. We obsened seepage from the scarp, approximately 15 to 20 feet down from the top of slope during our visit on July 1. We did not observe seepage on the slope during our August 14'h visit, but we observed new eroding of the exposed I/5