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As of Noveinber, 1979 these roads are all Haul Roads in accordance <br /> with Colorado Mined Land Reclamation Board Regulation 4 . 03 . 1 and <br /> Office of Surface Mining (OSM) regulations (Federal Register, <br /> March 1979) . Within the next three (3) years , roads B through <br /> G will be phased out as Haul Roads in accordance with the mine plan <br /> currently in effect. Road A will remain as a haul road. <br /> The existing average width of these roads is 40 feet. This road system <br /> traverses very steep mountainous terrain from the lowest elevation at <br /> 8 , 050 feet up to a maximum elevation of 10 , 200 feet within a hori- <br /> zontal distance that is less than 2 miles . The average road surface <br /> gradients range from 2 to 9 percent. <br /> Severe road construction conditions have been encountered on Roads <br /> C, D, and F to Mine 4 , Mines 1 and 2 , and Mine 3 , respectively. These <br /> roads have several long stretches with steep fill slopes . <br /> Drainage Control Structures as of October, 1979 <br /> Mid-Continent Resources , Inc. has installed and is maintaining drainage <br /> control structures at the most critical points on the haulage road <br /> system. Table 1 , Culvert Design for Haul Roads, tabulates all existing <br /> drainage control structures according to type and size in accordance <br /> with road centerline stationing. <br /> The lowest point at a road junction is station 0+00 with station numbers <br /> increasing uphill. Horizontal distance in feet is equivalant to this <br /> stationing system. <br /> The existing drainage control structures have been designed by Fleming <br /> 4 <br /> 11 <br />