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<br /> <br />Bear Creek Quarry (M-1977-344) Permit Amendment <br />Holcim US Inc, 3500 Highway 120, Florence, CO 81226 <br />Phone (719) 288-1443 www.holcim.us 46 <br />2.4.4 Mine Infrastructure Development <br />The mine will develop as two distinct development projects. MTAC from the plant to RCQ and the Hwy 96 <br />Access to RCQ will be developed first. Once safe access is available for contractors, vendors and <br />employees, development of the mine infrastructure will begin including fencing and RCQ mine buildings <br />and utilities. <br />2.4.4.1 Material Transport and Access Corridor <br />MTAC will include an access road for employees and vendors and the planned overland conveyor system <br />(Figures 2.4.4.1-1 thru 3). The corridor will extend from the plant to RCQ or approximately 6.7 miles. The <br />conveyor and a maintenance road will lie inside a chain link fence. The access road will lie east of the <br />conveyor fence. <br />The gravel access road will be 40 foot wide to allow safe passage of both employees and equipment in <br />both directions. The road will be constructed with road base as the sub grade and 8 inches of gravel. The <br />road will have 10-foot-wide graded shoulders. <br />The conveyor will be constructed as the road is being constructed. The conveyor is planned to l be an <br />overland system with 13 elevated wildlife crossings. The wildlife crossings will be constructed over shallow <br />natural ravines or dry stream beds. The elevated section will span approximately 95 feet, reaching an <br />elevated height of 10 feet 9 inches, allowing the safe passage of wildlife along MTAC. The conveyor will <br />be supported by steel supports on precast concrete pads set on the graded and leveled ground surface <br />every 9 feet. <br />The conveyor system and conveyor service road will be enclosed by a 6-foot-high chain link fence to <br />prevent wildlife from coming in contact with the moving conveyor. The fence will end as the conveyor <br />begins to elevate for the wildlife crossings and recommence as the conveyor elevation drops to within 6 <br />feet of the ground surface. The fence will have security gates on each end of the overland stretches of <br />conveyor.Red Creek Quarry Infrastructure Development <br />RCQ development will include building a shop/office building, installing a sanitation vault, grading areas for <br />equipment and vehicle storage and an area for the secondary crusher in the northwest corner of Section <br />24. The area will be prepared by drilling, blasting and excavating material from a 1,000 feet by 800 feet <br />area using a bulldozer, a loader and off-road haul trucks. <br />The quarry shop and offices will be located in a 184-foot by 70-foot metal building constructed on a <br />concrete slab (Figures 2.4.4.2-1 thru 5). The concrete slab will be reinforced with rebar and will be 8 <br />inches thick in the warehouse, 4 inches thick in the office and 12 inches thick in the shop. The shop <br />building will have electricity from the area provider, a septic vault engineered for up to 25 employees and a <br />water well for sanitation and equipment maintenance needs. Equipment will be maintained and repaired in <br />the shop. The shop will include wash bays and floor drains that discharge into an oil/water separator. <br />Diesel fuel will be stored on site in a 20,000-gallon double walled above ground fuel tank with concrete <br />wall crash protection structure. <br />2.4.5 Mine Development <br />Mining will occur as a conventional open pit mine utilizing drilling, blasting, loading, and hauling <br />equipment. Limestone for the plant will be transported from the blasted working faces by excavators to <br />potentially two in-pit mobile crushers located in the vicinity of the working face. This initial crushing will <br />produce 8-inch minus material. The 8-inch minus material will be conveyed to the secondary crusher in the <br />northwest corner of Section 24. The secondary crusher will reduce the feedstock to 4-inch minus +/- 0.5 <br />inch that will be transported by conveyor approximately 5.7 miles to the blending hall for further <br />processing.