5431 1ST DR W 2016-01-01 MF Import

.—. � Geo�En�ineen � Apiil 19, 1993 fcmccbnical. fcocm�ironmenlal and Gcolog%c Scrcires Select HOmes 237 Elm Strat Everett, Wachington 98203 Attention: Mr. Randy Clazk Building Setbeck Conditions Hanabrook Development Divisions III and N EverNt, Washington File No. 2670-005-R06 'ILe purpose of this letta is to oudine reduced building setbacic conditions for location of 6omes at the tops of slopes on Divisions III and N of the Hanabrook Development in Evuett, Wuhiogton. 7bis hac beee discussod with Mr. Randy Clark of Select Homes, Mr, pat McCourt of Untvexaa!Brokaage Corporation, end Mr. Michael Crowson of WdcH Pacific. We have observed no signs of instebiliry on native slopes in Divisions III and N. Fill slopes on Divlsioat If[and N wae constnaaed with awctural fiil consisting of on-site graaular soils under tull-time monitoring of a quslified individual from our fum. 'ILe structural fili is keyod into existiag firm native soils and fiU placed to achieve the final slope grades hac been properly benched inw existing native materials and compacted to 95 percent of MDD (ma�cimum dry density)according to the specificadons of the ASTM D-1557 test procedure. In addition,the lots are graded to slope away from the tops of slopes and all slopes have been covered with jute matting and hydroseeded for erosion protection. In our opinion, where slopes have been placed, compacted, graded, and vegetated as described above, the minimum building s�iback distance can be reduced to 10 fect. The setback dista�ce is the horizontal distance measured from the front face of the footing to the face of the slopf:. 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 foundations are incrcased. 1.�..',� � . � � �Cl:�� '.n. . _ `� . � .t�� i.. . . �i T.l\.`�.b�.�' .�• �