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for movement of drainage channel excavation material, asphalt surfacing material, and topsoil aze • noted on the cycle time sheets included in Appendix B, Productivity Documentation. Once haulage routes for all major material movements were delineated, the length and average grade of individual haulage segments were determined by direct measurement from maps. Information on haulage segment lengths and grades was utilized as input to the equipment productivity calculations presented in Appendix B, Productivity Documentation. 7.0 SELECTION OF APPROPRIATE RECLAMATION EQUIPMENT Determination of required reclamation functions, material movement requirements, and material movement distances provided the basis for selection of the appropriate reclamation equipment. For the overburden drilling required for cast blasting, a Driltek D60K overburden drill was selected due to its drilling depth capabilities and productivity. Based on the limited push distances required for recontouring; the fact that, except for cast blast material, the cut material would be in a consolidated condition; and the volume of material to be moved; a powerful, high- capacity dozing unit was indicated for recontouring. The Caterpillaz D10N tracked dozer was selected as the principal dozing unit due to its capabilities in moving consolidated materials and its high production capacity. For excavation of the West Pit drainage channel material, a • Caterpillaz 637E twin-engine, medium-capacity scraper was selected. For topsoil replacement, a combination of loaderltruck, utilizing 992D wheel loaders and 777C haul trucks, and b37E scrapers, in a push/pull configuration, were selected. Additional eartlunoving and reclamation support equipment including a Caterpillar 14G motor grader and 5,000 gallon water truck were selected on the basis of both job size and compatibility with the tasks necessary to complete the reclamation work. 8.0 CALCULATION OF EQUIPMENT PRODUCTIVITIES Reclamation equipment productivities were calculated for each reclamation function using push distances or haul segment length and grade information previously developed and standazd calculation methods. For tracked dozer production, productivity estimates were based on measured push distances and grades and correction factors and seismic velocities obtained from the Caterpillaz Performance Handbook. Production estimates for tracked dozers aze summazized in Appendix B, Productivity Documentation. Estimates for overburden drill productivity aze based on historical Colowyo operating . production data, which reflects typical unit equipment availability and utilization. Production estimates for drills aze summarized in Appendix B, Productivity Documentation. Historical drill production rates for Colowyo Coal Company are listed in Appendix E, Other Documentation.