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<br />.: <br />r~ <br /> <br />_' <br />r <br />-4- <br />1.3:1. It appears that the fill consists primarily of bedrock. Cut <br />slopes on the County Road and the existing haul road are about 0.36:1. <br />In some places along the County. Road, cut slopes are up to 25 feet in <br />height. Ne understand that these tuts are about two ,years otd and are <br />apparently stable. Some slaking of the surface materials has occurred. <br />PREVIOUS INVESTIGATIONS <br />Snowmass Coal Company has provided us with a report prepared by Chen <br />_j <br />i <br />~` <br />.~ <br />L <br /> <br />L <br /> <br /> <br />*~ <br />and Associates (Job No. 20347). The report was prepared to evaluate <br />haul road slope stability at other portions of the mine and included the <br />results of laboratory testing conducted on remolded samples of the <br />Mancos shale. Testing indicates the remolded material has a residual <br />cohesion of 400 psf and an angle of internal friction of 19 degrees. <br />These Darameters are for samples which were compacted to about 95 <br />percent of maximum standard Proctor dry density determined in accordance <br />with ASTM D 696. <br />PLAN AND PROFILE <br />Based upon the criteria by Snowmass Coat and the requirements of <br />2CCR 407-2, Section 4.03, our firm has designed the haul road alignment <br />and profile shown on Figs. 1 and 2. Plans were based upon a topographic <br />mapping provided by Snowmass Coal Company. The road was designed to <br />minimize cut requirements so that the uphill side would be near existing <br />elevations. Fill is placed on the downhill side to obtain the service <br />width. There are two areas where cut of the uphill side will be <br />necessary. The approximate limits of cut and fill are shown on fig. 1. <br /> <br />