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-$- <br />.. <br />_1 <br /> <br />.. <br />r <br />_' <br />L <br /> <br />• <br />L <br />t <br />_~ <br /> <br /> <br />road be sloped to drain toward the "uphill" side. The configuration of <br />the drainage ditch, as we 11 as the locations and sizes of culverts <br />required should be sized by a hydrologist. Overall drainage should be <br />planned so that water is not allowed to pond on the haul road surface, <br />in drainage ditches, or adjacent to the haul road. <br />LIh1ITATI0N5 <br />This report was prepared based upon observations and mapping of the <br />geology, strength parameters for fill presented by Chen and Associates, <br />and design plan and profile. Our fill slope stability analysis assumed <br />that the Mancos shale will be used as fill soils. If soils other than <br />the Mancos are used, the materials should be tested to verify the <br />strength assumptions used in our analyses. Designs were predicted upon <br />a life of 5 years. If the assumptions used in the analyses are <br />inconsistent or change as a result of mining, we should be consulted to <br />review the work. Construction should be observed and tested. <br /> <br />