5429 1ST DR W 2016-01-01 MF Import

Geo�En�ineen Aptil 19, 1993 ccmechnical. ' fcocncimnmental and Geologic Sercices Se�td Hom-:5 237 Elm �urd Everett, Wa�Sinbton 48203 Attention: t.lr. Randy Clark Building Setback Conditions Hanabrook Devdopment Divisioas III and N � Evadt, Washington ' File No. 2670-005-R06 'Ihe puipose of this letta is W oudine roduced building setback condidons for location of , homs u the toQs of slopes on Divisions IQ and N cf the Hanabrook Development in Evereu, R'ashio¢ton. 'Itiis hu been discvssed wiffi Mr. Randy Clazt of Seled Homes, Mr. Pat McCourt ' of Univusal Brokaage Co�poration, and Mr. Michael Crowson of W&H Pacific. 'We have obsavad no aigas of instabiliry on native slopes in Di�•isions III and IV. Fill • alopea on Divisions II!and N wae coacttuctod with atiuctural fill consisting of on-site granular soils unda full-time monitaring of a qualifiod individual from our firm. 'lbe structural fill is keyed into existing firm native soils and fill placed to achieve the fin�l slope grades hu baen properly benched into eacisting native materials and compaMed to 95 percent of MDD (maximum dry density)according to the specifications of the ASTM D-1557 test procedure. In addition,the lots are graded to slope sway from the tops of slopes and all slopes have been covered with jute maaiag and hydroseedod for erosion protection. In our opinion, where siopes have been piaced, compacted, graded, and vegetated as described above, the minimum building setback distance can be reduced to 10 feet. Thc setback distance is the horizontal distance measured from the front face of the footing to the face of the slope. It should be understood that if the setback distance is reduced to 10 feet, the risks of losing access, reducing the design life of the foundations and having slope movement impact the house foundation� are increazed. �, . „�r> �,., _ , . � a��,,,, �, , ,�;:»,,,� ��.� �i.�,;_ i�:� :��,�.,,i�, F.n ��i,n;�� p,•.v:o..e�:�sf woe�