4719 BELVEDERE AVE 2016-01-01 MF Import

LIiJ & ASSOCIATES, INC. Gsolechnfcal EnDh�eerNq E�qMaerkq GaobOY Earth Scbrwe Feb�vary 14, 2007 Mr. David King 4717 Belvedere Avcnue F,verett, WA 98203 Dcar Mr. King: Subject: llry Season Grading and Building Setback Recommendation Proposed 2-Lot Plat 4717 Belveciere Avenue Everett, Wavhington L&A ]ob No. 6A076 C G 7 �S u�(z In our geolechnical report, dated June 28, 2006, prepared for the subject project, we rccommcndod tlwt grading and foundation consUuction work for the proposed new residence to be conswcted on !he newly platted Iot be carried out and complcted in the dryer perioci from April 1 to October 31. The intention of this recommendation is to minimi7z impact oo site stability during full scalc cleereng and grading activities from potential erosion, storm runoff and groundwater seepage which are likely to be encountered in the wet winter months. it is our opinion that tlus recommend should not apply to hand excavadon end planting as you plan to do in this and next monUvs, which will only create lim9tcd disturbed amas. Howevec•, it is always prudent to cover dishubed ground with shrcdded bark and plastic tarp until the plants and vegetation Ane fully cstablished. We also provided recommendations in our 6/282006 geotechnical report for building setback from the top of bank of stcep slope (40% or more) to assure stability of the proposed residence. The setback for e lig6t-weight deck you plen tn conshuct to ebut the back of thc house msy be reduced to 5 Ic;ct if the dac;k is to be supported on 4inch-diameter standnnd steel pipe piles driven to reCusal with a hydrnuJic mechenicel hemmer at Ie�st 850 pounds delivering 600 blows per minutc minimum, or a differentinl-acting air hemmer at leaat 6(N) pounds delivering 600 blows 19213 Kanlake Place NE • Kenmore, Washingbon 98028 Phone (425) 483-9134 • Fax (�t25) 486-2748