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• .,w rn~nc Aca~moo~~ tonar6o foot cc.ps~, <br />9. Blast coal seam; and <br />10. Remove blasted coal with front~nd loaders. <br />Ammonium nitrate (ANFO) will be used as the explosive material. Each blast will consist of a <br />maximum of 72 holes drilled to a depth of 30 to 60 feet in a 16 ft X 18 ft pattern. When all 72 <br />holes are drilled to 60 feet, the total amount of ANFO used will be 54,720 pounds for each blast. <br />When all 72 holes are drilled to 30 feet, the total amount of ANFO used will be 27,360 pounds <br />for each blast. On the assumption that blasting will occur once per day for the 255 working days, <br />and half the holes will be drilled to 60 feet and half to 30 feet, the annual usage of ANFO will be <br />10,465,200 pounds. The explosives storage area location is shown on Figure 2 labeled as the <br />Surface Mine Supply Storage Area. <br />Support equipment for the surface mine will include the following: <br />2 - D-11 size Production dozers <br />2 - D-9 size dozer <br />1 - D-8 reclamation dozer <br />2 - 50,000 Ib. drills <br />1 - 15 cubic yard front end loader <br />• 2 - 1 & 3 cubic yard backhoes <br />2 - 8 & 10 cubic yard coal loaders <br />3 - 85 ton haul trucks <br />2 - 12G to 16G size road graders <br />1 -Mechanized broom <br />2 -Maintenance trucks <br />1 - 20,000 gallon water truck <br />1 - 10,000 gallon water truck <br />Portable storage facilities will also be supplied for explosive materials in bulk quantities and two <br />5,000 gallon diesel fuel storage tank. The initial location for materials storage is shown in Figure <br />2 labeled as the surface mine supply storage area_ <br />Surface Mining Sequence <br />The low gap in the ridge between Cow Canyon and Jeff Canyon will be mined first. The material <br />from this first mining will be placed in the fills adjacent to the gap. A contour cut will be made <br />along the outcrop of the lowest seam to be mined. The material from this cut will be pushed with <br />dozers or end dumped into adjacent or nearby fills. The highwall of the contour cut will reach the <br />outcrop of the next highest coal seam. Coal from the seams will be loaded into off highway trucks <br />and transported to the shuttle train loadout in Lorencito Canyon. This process will continue until <br />• the pit extends through the gap and an east and west face is established on both sides of the ridge. <br />The west face and pit area will remain open for future mining. The east face will provide the <br />working area for a cross ridge operation. <br />L~.nn.~~,.Y io. ivm 6 <br />