1208 50TH ST SW 2017-01-27 - Laserfiche WebLink

NELSON C►�EOTECHNICAL � ,.. A ASSOCIATES� I NC. GEOTECHNICAL ENGINEERS & GEOLOGISTS Main Office 17311 — 135`h Avenue NE, A-500 Woodinville, WA 98072 (425) 486-1669 FAX (425) 481-2510 (425) 337-1669 Snohomish County Deceinber 10, 2012 Ahlned Alhuss�uii 607 SE Everett Mall Way, #6 Everett, W�shington 98208 Geotechnical Engineering Letter Alhussaini Slope Repairs 1nd Block Retaining Walls 1208 -50`�' Street SW Everett, Washington NGA File No. 867612 Dear Mr. Alhussaini Engineering-Geology Branch 437 East Penny Road Wenatchee, WA 98801 (509) 665-7696 FAX (509) 665-7692 This letter summarizes our evaluation and opinions of the recent fill placement on the steep southeast-facin� slope along with design and construction recommendations for block retaining walls to support landscaping areas along the steep slope to the west of the residence located at 1208 — 50`�' Street SW in Everett, Washington, as shown on the Vicinity Map in rigure 1. Our services were completed in general accordance with our proposal, which you signed on November 1, 2012. INTRODUCTION We understand that you planned to construct a tiered retaining wall system on the steep southwest-facing slope to the west of the residence. As a part of the planned improveinents, you iinported fill soils and placed them on the slope for later use in the retaining wall system construction. While fill was being imported, we understand that the City of Everett "red tagged" the work since there was no pernzit and infornied you that no additional work could take place until a geotecluiical evaluation of slope stability and airy work that has been perfornled on the I property. Since the fill soils have been placed on the slope, we observed that significant , movement of the upper fill soils has taken place resulting in large tension cracks at the top of the slope and soils movinb down the slope toward the southern and western property lines. You have