2008-02-22_APPLICATION CORRESPONDENCE - C2008086 (46)

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CHAPTERTWO Alternatives Construction Surfacing a mine access road is atrucking-intensive task. It is estimated this work would be performed over atwo-month period toward the end of the construction project, as shown in Table 2-10, Mine Access Road Material, and Table 2-ll, Mine Access Road Surfacing. Table 2-10 MINE ACCESS ROAD MATERIAL Item Loads Equipment Horsepower Gravel - 80,000 tons 3,200 Gravel trucks 400 Asphalt - 25,000 tons 1,000 Asphalt trucks 400 Total 4,200 Average over 2 months (Loads per day) 100 Notes: *For each piece of equipment. Table 2-11 MINE ACCESS ROAD SURFACING Item Number Shifts/Day Hours/Day Horsepower Motor Grader 2 1 20 180 Compactor 1 1 10 310 Water Truck 1 1 10 400 Notes: *For each piece of equipment. The facilities associated with the proposed mine would be constructed on benches. Benches are carved out of the steep terrain to provide relatively flat surfaces for the mine facilities. Most benches are constructed by excavating the steep slopes and filling ephemeral drainages. The first or upper bench is a utility bench for the water tank. The second or portal bench is developed for a shop, warehouse, raw coal stockpile, reclaim tunnel, and other facilities. The third or material bench is for material storage and parking. The fourth is the office/bathhouse bench. There will also be a coal preparation plant bench and unit train loadout bench. Construction of the associated facilities would be the most labor-intensive part of the project. It is estimated the structure crew would be on site for six to nine months to complete all of the mine structures shown in Table 2-12, Mine Structures. Table 2-12 MINE STRUCTURES Item Number Shifts/Day Hours/Day Horsepower Crane 3 1 30 200 Front-end Wheel Loader 2 1 20 200 Fork Lift 2 1 20 100 Concrete/Gravel Trucks 8 0.3 24 400 Delivery Trucks 4 0.3 12 350 2-53