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MINING PLAN <br />+l. General Mining Plan <br />EXHIBIT D <br />The property boundary has been surveyed on site and the permit area will be surveyed prior to <br />any site disturbance. Map C-3 shows the mining plan. <br />The gravel zone is approximately 20 feet thick in an alluvial deposit and is overlain by soil and <br />overburden ranging from 12 inches to 6 feet. The mining of the area in this permit will take place <br />in 3 phases, each approximately 9-10 acres in size. The gravel is recent alluvium of the <br />Quaternary Age, in the old floodplain of the Yampa River. The bedrock underlying the gravel is <br />Lewis Shale. Mining will occur to the top of the shale since there are no known issues with <br />selenium in the Lewis Shale. <br />The maximum total tonnage sold from the site in any one calendar year is approximately 150,000 <br />tons, though the expected annual average is 125,000 tons. The raw material will be sold in three <br />products: sand and gravel, concrete, and asphalt. Since Elam already has production facilities at <br />the neighboring Bunn Ranch Pit, raw gravel extracted from the Gehrman Pit will be processed at <br />the Bunn Ranch facilities. No processing will take place on the Gehrman site. A breakdown of <br />the product tonnages and mined tonnages can be seen in Table D-1. The total disturbed area is <br />31_28:4 acres. A breakdown of the estimated areas and the material from each phase is included <br />in Table D-2. <br />Gehrman Pit October 09 D-1