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3740 Togo Road,Wayzata,Minnesota <br /> April 17,2014 <br /> Page 2 of 3 <br /> The design of the wall system assumes the following: <br /> - Soil conditions: Sandy Silt/Clay,friction angle=30.0 degrees,unit weight of 120.0 lb/ft3 <br /> - Allowable soil bearing capacity=2,000 psf <br /> - No external surcharge loading behind walls <br /> j - Slope at bottom of wall= 10:1; Slope at top= 10:1 <br /> - Minimum embedment depth=6" <br /> - Boulder Type: 12"-30" <br /> Direct concentrated surface drainage away from the walls. The wall design was performed using the <br /> design guidelines presented in the third edition of the"Design Manual for Segmental Retaining Walls" <br /> (DMSRW)published by NCMA in 2009. If soil conditions,proposed wall layouts,or other design <br /> parameters vary from that assumed, a revised analysis may be needed. Please call me if you have any <br /> questions or need more information. Thank you. <br /> Sincerely, <br /> Paul Schimnowski,PE <br /> CRITERIUM-SCHIMNOWSKI ENGINEERS <br /> TEL 651 779-7700 f <br />