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i <br />bedrock. The presence of sandstone in this area doubtless adds to the <br />stability of the near-surface material, and the shallow subsurface rock <br />section. The presence of both stabilized ground (Qsg) and unstable cp•ound (Qug) <br />are questioned in this general area. <br />Sta. 53+70 to Sta. 63+85 (Drawing No. 9111-5). This reach of the <br />alignment is within unstable ground (Qug). Within this reach the must unstable <br />ground is between Sta. 58+00 and Sta. 61+00, left. Where substantial fill <br />sections of the haul road are to be made over steep slopes in the unstable <br />ground, as at Sta. 70+00 (Peabody Coal Company, Exhibit XS-1) the highest <br />density material available should be used in the road bed fill. This in effect <br />will serve to weight and stabilize the toe of the steep slope. <br />It is critically important in the terrain formed by unstable ground to <br />establish a surface drainage system that will remove water from the road and <br />into the natural drainage as quickly as possible. <br />Sta. 63+85 to Sta. 72+00 (Drawing Nos. 9111-5 and 9111-6). This reach of • <br />the road is within stabilized ground (Qsg) and extends almost parallel to and <br />slightly to the right of its contact with potentially unstable ground (gpug). <br />Landslopes to the right of the alignment are covered to a large extent with <br />scrub oak and serviceberry. This ground should remain stable unless extensive <br />cuts are made in it. To the left of the alignment there is potentially <br />unstable ground (Qpug) and numerous indications that disturbance of this ground <br />would likely cause movement. The indicators of potential instability are <br />hummocky ground, local slumps, and stagnant (ponded) water. Erosion in this <br />area is marked, and whatever temporary equilibrium has been reached in the <br />erosion cycle probably is tenuous. <br />The alignment in this reach could be better located by moving it about 50 <br />to 100 feet to the right and essentially parallel to its present bearing. • <br />14 <br />