5432 1ST DR W 2016-01-01 MF Import

-, ---- Geo�Engineei� • Aptil 19, 1993 Gcotechnical. Gcocncironmemal and Gcologic Scn�ice� Select Homes 237 Elm Strcet Everett, Wuhingtnn 98203 Aaention: Mr. Randy Clazk Building Setback Conditions Hanabrook Development Divisioas III and N Everett, Was6ington File No. 2670-0OS-R06 1be purpose of this letter is W outline reduced building setback conditioos for location of homes at the tops of slopes on Divisions III and N of the Hanabrook Development in Evaea, Wuhington. This has been discussed with Mr. Randy Clark of Setect Homes, Mr. Pat McCourt of Universal Brokaage Corporation, and Mr. Michael Crowson of WBcH Pacific. We have observed no signs of instability on native slopes in Divisioas III and IV. Fill slopes on Divisions III and IV wae consaucted with savctural fill consisting of on-site granulaz soils under full-time monitoring of s qualified individual from our firm. '!tu slructural fill is keyed into exisdng firm native soils and fill placed to achieve the final slope grades has been properly benched inw existing native materials and compacted to 95 percent of MDD (maximum dry deasity)according to the specificadons of the ASTM D-1557 test procedure. In addition,the Iots are graded to slope away from fhe 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 setback distance can be reduced to 10 feet. The saback distance is the 6orizontal distan:e measured from the front face of the footing to the face of�he slope. It should be understood that if [he setback distance is reduced to 10 feet, the risks of losing access, xeducing the design life of the foundations and having slope movement impact the house fou�dations are increased. , .��„ �. , , . , ��:�,:.. , � :,_d;n,�na.��:a ��.��:_ . iy�Lo�i� i_ •�.i.� , ��i� .:��'�w„�,.1� ��cn