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c R~~~e~ <br />~~ <br />AHD "~~ <br />°i~isian of B?Op~ <br />Minis ReG <br />pumped from the dewatering trench so that gravel can be9~$tion, <br />etY <br />dry. NPDES permit CO-0036200 has been issued for this operation. <br />Size of Areas - Phasing - Disturbances <br />Mining will follow the sequence described above and will be <br />conducted in 8 stages. First, overburden will be stripped <br />from the area to be mined with a scraper. A dewatering trench <br />around the area to be mined will be dug by backhoe. Ground <br />water percolating through the gravel strata will collect in the <br />trench and be pumped from its lowest point to flow eventually <br />into the Cache la Poudre River. Front end loaders will excavate <br />the dewatered gravel face leaving a base of approximately 8 <br />inches of gravel above the bedrock shale. If a backhoe is used <br />for excavation, no gravel base will be left above shale. <br />A portable crushing/screening plant will be located south of <br />the intersection of Boxelder Ditch and Co. Rd. 9. Pit run <br />gravel will be taken !.o the crusher by front end loader or truck <br />and conveyors The crushing/screening operation will produce <br />aggregate for road base, concrete ::nd hot mix. Road base will <br />IYe stockpiled strategically near the crusher to be hauled to <br />.construction sites during the construction season. Hot mix <br />1 be produced on site by a portable asphalt plant, and concrete <br />a concrete plant. <br />economic conditions remain as projected, preparatory work <br />D-4 <br />