Bureau of Mines / Minerals yearbook: Metals, minerals, and fuels 1972
Year 1972, Volume 1 (1972)
Sand and gravel, pp. 1103-1121 ff. PDF (1.8 MB)
-.1103Sand and Gravel By Walter Pajalich 1 Sand and gravel production decreased about 1% to 913 million short tons. The value of production increased about 4%. Output from commercial operations was 86% of the total output, while Govern- ment-and-contractor production was 14%. The production of sand and gravel in the Nation's leading State, California, increased from 115 million short tons in 1971 to 117 million short tons in 1972. DOMESTIC PRODUCTION -California, with 117 million tons, ranked first in sand and gravel output and produced about twice as much as secondranked Michigan. Other States producing substantial quantities of sand and gravel in descending order of production were Ohio, Illinois, Minnesota, Wisconsin, and Texas. Combined production from the seven leading States was 369 million tons, about 40% of the total U.S. output. The value of sand and gravel produced in these seven States was $471 million, 39% of the Nation's total. The number of commercial operations continued to decline from 5,738 in 1971 to 5,384 in 1972. Factors, which have added to the consumer cost of sand and gravel, included increased labor costs, growing land values, cost of land rehabilitation, longer haulage distances, which increase transportation cost, and the need to produce from lower quality deposits as better ones become depleted or covered by urban expansion. There were 4,286 commercial operations with production under 200,000 tons per year. These operations accounted for 30% of the total US. production. There were 751 operations with -production between 200,000 and 500,000 tons, and they accounted -for 30% of production. The remaining 347 operations with production over 500,000 tons, accounted for 40% of production. The use of larger operating units, more efficient portable and semiportable plants, versatility of plant capacity, and greater awareness of pollution control and land rehabilitation were the keynote of progress in 1972. Anchorage Sand & Gravel Co.'s new plant in Alaska, has a 10-year supply of sand and gravel from several pits in -the area. The 400- to 500-ton-per-hour plant has the versatility of making marketable products from a variety of sources. The plant is highly automated with a central console control for ' the entire operation.2 Ohio Gravel Co., Division of Dravo Corp. opened a new 900-ton-per-hour plant at Newton, Ohio. The operation is automated and controlled from a central console. It is monitored by a closed-circuit TV system and coordinated through use of a UHF radio communications system. The stockpile storage area will hold up to 200,000 tons of material. The 75-acre mining property is under lease and is estimated to contain about 5.5 million tons of sand and gravel reserves. The property is on the perimeter of land owned by Dravo Corp. Sand and gravel mined on the property is hauled to the plant on a 2½-mile off-highway road.3 Consolidated Rock Co. began working a sand and gravel property at Irwindale, -Calif. The deposit is located on the alluvial fan at the mouth of the San Gabrial River. The plant is automated and has a 2,400-ton-per-hour capacity.4 1 Mining Engineer, Division of Nonmetallic Minerals—Mineral Supply. 2 Pit & Quarry. New Alaskan Gravel Plant Uses Modern Methods—Equipment. V. 64, No. 12, June 1972, pp. 81—82. ' Levine, Sidney. Ohio Gravel Replace, MultiUnit Complex With 900-tph Plant. Rock Products, v. 75, No. 9, September 1972, pp. 74—77. California Geology. A Publication of the Callfornia Division of Mines and Geology. V. 25, No. 10, October 1972, pp. 233—234.
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