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See Section 1 + 60, Map C-13 <br /> 1-.6691 <br /> P = 2 (86) (11') 1+.6691 = 1031.5 - <br /> (11) (55) <br /> R = 2 (86) ( .93) = 24193.9 <br /> 24193.9 <br /> G = 1031.5 = 23.5 <br /> 2) Material Strength <br /> The fill material is mine waste consisting of quartz <br /> sandstone with calcareous to slightly ferruginous cement and <br /> minor argillaceous and carbonaceous shale partings. <br /> Relative toughness: 1.5 <br /> Ft. lb/f t' of fracture: 312.4 <br /> Compressive strength, lbs/ sq. in: 9500 (no partings) <br /> Compressive strength, lbs/ sq. in: 8400 (partings) <br /> Compaction: 12.5% <br /> 3) Geotechnical knowledge of the site <br /> Geotechnical knowledge of the site is demonstrated in: <br /> a) :rational King Coal , Inc M L R D permit ARRl i cation, <br /> Section 2.04.5 General Description of Hydrology and Geology <br /> Section 2.04.6 Geology Description <br /> Section 2.04.7 Hydrology Description <br /> Section 2.05.6 Mitigation of Impacts of Mining Operations <br /> Hydrologic Balance <br /> Subsidence Survey and Monitoring <br /> Subsidence Control <br /> Geologic Plan <br /> b) Memorandum, Geological Stability of Stored Development Waste <br /> (M L R.D. Stipulation) , dated December 19, 1981. <br />