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-3- <br />• <br />• <br />the pit floor. The spoil rises from the toe to the crest between 70 and 100 <br />feet above the pit floor. The pit floor slopes downward to the northwest at <br />about 5 to 10 degrees. <br />Bedrock was essentially exposed the full height of the highwall. host <br />of the soils at the crest have been removed. The bedrock exposed consisted <br />of interlayered sandstone and shale. It appears the highwall was originally <br />cut at an angle about 65 degrees, or steeper. Due to weathering of the softer <br />materials, portions of the highwall have eroded and sloughed back to angles <br />less than 65 degrees and as flat as 40 degrees. The flatter slopes are pre- <br />dominantly located near the crest with the steeper slopes present near the <br />base of the highwall. <br />The surface of the spoil, above the pit area, slopes down toward the <br />pit at angles between 5 and 10 degrees. The spoil face from about Sta. 0+00 <br />to Sta. 8+00 appears to be at the angle of repose. A relatively flat area <br />about 100 feet in width breaks the slope between Sta. 10+00 and Sta. 17+00. <br />Most measured slope face angles were between 30 and 40 degrees. <br />An approximate 12-foot high, near-vertical cut exists between Sta. 0+00 <br />to about Sta. 10+00. This cut is at the spoil toe, adjacent to an access road <br />into the pit. Goal, which was not removed during the mining sequence, is <br />exposed in portions of this cut. The materials exposed across the face of the <br />spoil slope include non-slakaable bedrock, varying in size from less than <br />3/4 inches to greater than 3 feet in diameter, and highly slakeable shales which <br />have decomposed to essentially a soil. There is very little vegetation present <br />across the spoil slope face. <br />Water was observed seeping from the toe of the spoil slope at several <br />• locations within the pit. Springs are apparently providing sufficient water to <br />