Bureau of Mines / Minerals yearbook: Metals and minerals 1978-79
Year 1978-79, Volume 1 (1978-1979)
Pressler, J. W.
Gypsum, pp. 411-422 PDF (1.6 MB)
412 MINERALS YEARBOOK, 1978-79 gypsum in 1979. Leading individual mines in 1979 were United States Gypsum's Alabaster mine in losco County, Mich.; United States Gypsum's Plaster City mine in Imperial County, Calif.; National Gypsum's Tawas mine in losco County, Mich.; United States Gypsum's Sweetwater mine in Nolan County, Tex.; United States Gypsum's Sigurd mine in Sevier County Utah; United States Gypsum's Shoals mine in Martin County, md.; and Georgia-Pacific's Acme mine in Hardeman County, Tex. These seven mines accounted for 37% of the national total. Average output per mine in 1979 for the 65 U.S. mines was 225,000 tons, compared with 194,000 tons per mine in 1.77. In 1979, 13 companies calcined gypsum at 72 plants in 30 States. Output increased from 12.6 million tons of calcine valued at $278 million m 1977 to 145 million tons valued at $442 million in 1979, a tonnage increase of 16% and a value increase of 59% compared with that of 1977. Output in 1979 was a new annual record. Leading States were California, Texas, New York, and Iowa. These 4 States, with 23 plants, accounted for 38% of the national output. Leading companies were United States Gypsum Co. (22 plants), National Gypsum Co. (19 plants), Georgia-Pacific Corp. (9 plants), The Flintkote Co. (6 plants), and Celotex Div. of Jim Walter Corp. (5 plants). These 5 companies, operating 61 plants, accounted for 84% of the national output in 1979. Leading individual plants were United States Gypsum's Plaster City plant, Imperial County, Calif; United States Gypsum's Stony Point plant, Rockland County, N.Y.; United States Gypsum's Detroit plant in Wayne County, Mich.; Weyerhaeuser's Briar plant, Howard County, Ark.; United States Gypsum's Shoals plant, Martin County, md.; Pacific Coast Building Product's plant in Clark County, Nev.; GeorgiaPacific's Acme plant, Hardeman County, Tex.; United States Gypsum's Southard plant, Blame County, Okla.; United States Gypsum's Sweetwater plant, Nolan County, Tex.; and United States Gypsum's Fort. Dodge plant, Webster County, Iowa. These 10 plants accounted for 30% of the national output. Average output per plant in 1979 for the 72 U.S. plants was 202,000 tons, compared with 177,000 tons per plant in 1977. In 1979, the following companies sold a total of 828,000 tons of byproduct gypsum, valued at $5 million, for agricultural purposes: Occidental Petroleum Corp., Allied Chemical Corp., Valley Nitrogen Producers Inc., and Victor Material Co. (all in California), Occidental Petroleum Corp. (Florida), Texasgulf Inc. (North Carolina), and American Cyanamid Co. (Georgia). Several gypsumboard plant expansions and two plant startups increased the national production capacity an additional 1.23 billion square feet per year. The available capacity of operating. gypsumboard plants in the United States at yearend 1979 was 18.23 billion square feet per year, a 7% increase compared with that of yearend 1977. Total 1979 gypsumboard production in the United States was 16.7 billion square feet. This indicated a 92% national utilization of capacity for the year. In 1978-79, National Gypsum Co. began operations of two new gypsum wallboard plants, one in Rensselaer in Rensselaer County, N. Y., and the other in Wilmington, New Hanover County, N. C. The company also announced that the output of the Phoenix, Ariz., plant would be increased 40% by 1980. United States Gypsum Co. announced several plant expansions and modernizations during the biennium, including the Philadelphia, Pa., plant and the Sweetwater, Tex., plant. The Philadelphia plant is one of the oldest in the United States, and has produced more than 4 billion square feet of wallboard since 1929. In 1979, Domtar Gypsum. America, Inc., completed the multimillion-dollar expansions of its two wallboard plants in Long Beach and Antioch, Calif., which represents a total 32% increase in capacity.2
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