Mineral Appraisals: What is the Value of a Quarry or Mine?
The average specific gravity of sand and gravel is difficult to quantify, owing to variations in the degree of packing and water content. A factor of 111 lb. /cu. ft. is commonly used for sand and gravel, equal to about 3,000 lb. or 1.5 tons/cu. yd. This equates to about 2,400 tpa/ft. (111 lb. /cu. ft. x 43,560 cu. ft./acre-ft./2,000 lb. /ton).Get Price