5605 1ST DR W 2016-01-01 MF Import

Geo�Engineer� Apiil 19, 1993 Gcotcchnical. GeocncironmcntalanA Gcolugic Scrrices Seiax Homes . 237 Elm Stred Everett, Washington 98203 Auention: Mr. Randy Clazk Building Setback Conditions Hanabrook Developmem Divisioos III and N Everea, Washington File No. 2670-0OS-R06 'Ibe pucpose of this ldter is to outline reduced building setback wnditions for location of homes at the tops of alopes on Divisioas III and N of the Hanabrook Development in Everett, Wuhington. 7his hac been disca�ssed wit�Mr. Randy Clazk of Select Homes, Mr. Pat McCourt of Univusal Brokerage Cocporation, aad Mr. Michad Crowson of W&H Pacific. We Lave obsavad no atgns of iastab�iry on native slopes in Divisions III and N. Fill alopes on Divisions III and IV wae ooattivcted wit6 sttuctural fill consisting of on-site granular soils under tull-time monitoring of a qualifiod individual from our firm. The savctural fill is keyed into existing ficm native soils and fill placed to achieve the final slope grades has bcen propaly benched into eacisting native materials and compacted ro 95 percent of MDD (maximum dry density)acec+rding to the specifications 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 az described above, the minimum building setback distance can be reduced to 10 feet. The 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 d�e house foundations aze increased. .�.�'t�.�,;�n<<r• . . ...�,. I�-�ti�,;��.�...� \ t: u��:»,�nd.A1:1 ,•..;: �;ne�`Ilailc 1_n�.�,j.Uuun t.iA(_'INy\h�..u�:�i �