Your reserves - Mineral Valuation
2009-7-12 · sand and gravel is commonly used in the central U.S.At 3,600 tpa-ft.for limestone in the ground,sellable stone reserves are about 3,200 tpa-ft.,or about 320,000 tpa for a 100-ft.mineable thickness of limestone.At 2,400 tpa-ft. for sand and gravel in the ground, sellable reserves are about 2,000 tpa-ft., or about 100,000 tpa for a 50-ft ...
