1618 HOLBROOK AVE 2018-01-02 MF Import

I/ NELSON GEOTECHNICAL ,. N A� ASSOCIATES, INC. GEOTECHNICAL ENGINEERS & GEOLOGISTS Main Office 17311 — 135" Avenue NE. A-500 Woodinville. WA 98072 (425)486-1669 • FAX (425)481-2510 (425) 337-1669 Snohomish County January 29, 2007 Mr. Vitaliy Lyashuk 4815-125"' Avenue SE Snohomish, Washington 98290 Retaining Wall Design Letter 1618 Holbrook Avenue — Lot 2 Everett, Washington NGA File No. 755806 Dear Mr. Lyashuk: En9ineenng-Geology Branch 437 East Penny Road Wenatchee. WA 98801 (509)665-7696•FAY (509)665-7692 This letter presents the results of our geotechnical engineering evaluation of the planned temporary ecology block wall construction on the residential property located at 1618 Holbrook Avenue — Lot 2 in Everett, Washington. INTRODUCTION The site consists of a recently excavated building pad for it planned single -fancily residence. along the base of a nnoderate to steep north facing slope near the southern property line. The slope rises roughly 50 feet with inclinations of 15 to 35 degrees. You have requested that we evaluate the subsurface soil and groundwater conditions at the site and provide reconunendations for design and construction of a temporary ultra block retaining wall to support it cut along the southern side of your property. We understand that you plan to construct the single -fa inily residence near the southern property line, adjacent to the temporary ultra block wall and then backfill the area between the block wall and the south retaining wall of the residence with the ultra block wall remaining in place. For our use in preparing this letter we have beet! provided with a hand drawn site plan titled, "Plot Plan for Lyashuk Residence — Lot 2 (1618 Holbrook Avenue);' dated November 6, 2006. This plan shows the property lines and locations of the planned pavencent and structures.