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_18_ <br />significantly. The sand and silt mixtures in Test Hole 7 in the <br />• middle of the valley were encountered to a depth of approximatelay <br />20 feet. No soil was encountered in Test Hole 6, and approximately <br />5 feet of natural soil was encountered in Test Hole 8. <br />~e sand and silty soils encountered contained occasional <br />scattered angular gravel and minor percentages of clay. Based on the <br />penetration resistance testing and the laboratory testing, the soils <br />appear to be very stiff and dense. These soils are generally dry to <br />slightly moist and light brown in color. <br />The bedrock encountered in *_he test holes at the sediment pond <br />embankment is predominantly a silty to very silty elaystone containing <br />carbonaceous zones whid~ increase to very carbonaceous near the coal <br />beds. A coal bed approximately 4.5 feet thick was encountered in Test <br />Hole,S-6 approximately 4 feet beneath the valley side. A second coal <br />seam approximately 6 feet thick was e;ieountered approximately 18 feet <br />beneath the surface in Test Holy 6. A section across the axis of the <br />proposed elnban}anent is shown on fig. 5. The location of the section <br />is shown on Fig. 3. <br />Water Tank: The natural soils encountered in the upper 2 feet at the <br />water tank are the. same angular sand to cobble size rode fragments <br />encountered on the south hillside. Underlying these upper soils, our <br />test borings encountered bedrock to the maximum depth explored, <br />30 feet. The bedrock beneath the water tank consists of a <br />fine-grained, silty, well-cemented sandstone. <br />Haul Road: Subsurface conditions along the haul road Here assessed by <br />conducting a field reconnaissance and by obtaining CBR samples along <br /> <br />