2208 W CASINO RD 2018-01-01 MF Import

I February 13, 2oos E�1flI1 SOIUI.IOf1S NW LLC ES-0892.04 •c u�utr�hni�.d tngirn�rrinp •(nntitrur�ir.n Mnnilwing •f m uunntrnl,d 5�irn��. Panattoni Construction 18400 Southcenter Parkway, Suite 502 Searile, WA 98188 Attention: Mr. Ben Brodsky Subject: MSE and Modular Block Wall Design Casino Road Corporate Park Everett, Washington Reference: Earth Solutions NW, LLC Updated Geotechnical Engineering Study FS-0692.02, Dated February 13, 2008 Preliminary Grading and Storm Drainage Plan Barghausen Consulting Engineers, Inc. Sheet C3 of 5, Dated January 17, 2006 Dear Mr. Brodsky: In accordance with your request, Earth Solutions NW, LLC (ESNW) has prepared this MSE wall and gravity modular block wall design for the subject site. Analysis o( the proposed walls was pertormed using the MSEW 3 0 compuler program following AAHSTO design methodoiogy. Based on our review of the referenced site plan, mechanically stabilized earth (MSE) walls will be constructed along the eastern margins of the development envelope. The walls will rafse grades by up to about 21 feet to achieve the design subgrade elevation of about 563 feet. The tallest portion of the wall will be located in the southeastern corner of the property. The wall will face a wetland area. The MSE wall will support loaded truck traffic associated with the anticipated development. The MSE wall will include a (ace wrap consistinp of woven geotextile fabric to retain the fill near the suriace. As mentioned in the notes on the attached drawing, the geotextile and geogrid materiai must be able to withstand permanent exposure to ulfra-violet light and weathering without compromising strength performance. Gravity modular block walls up to about nine feet in height will be constructed along cuts made in the southern and western portions of the site. 2H71I 152nd Avrnur NI. • Krdmm�J.N'A 971Ui1 • 141SI'H.1 1400�I AX 141i1 2144 715;i• full Frrr INldd i3G fV 10 q�3 O