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In 10 acres there are 435,600 ft.2 at a width of <br />400 ft. (horiz.), the length will be 1089 ft. in order for <br />10 acres to be covered. <br />Total Volume = 62,524 ft.2 x 1089 ft. <br />= 68,088,636 ft.3 <br />• <br />Tonnage Estimate <br />127 lbs. x .68088636 ft.3 x 1 ton = 4,323628.4 ton <br />ft.3 2000 lbs, of ore @ 60~ <br />gypsum approx. <br />Note: My own arbii:rary guesstimate made by guessing at 40~ <br />impurities (interbeds) <br />Tonnage estimates by: <br />Michael K. Story <br />Teaching Asst. <br />Colorado School of Mines <br />(Graduate School) <br />January 3, 1981 <br />• <br />• <br />• <br />i <br />