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Bureau of Mines / Minerals yearbook: Metals and minerals 1977
Year 1977, Volume 1 (1977)

Pressler, J. W.
Gypsum,   pp. 457-467 ff. PDF (1.2 MB)


Page 457

  457Gypsum 
By J. W. Pressler' 
 The gypsum industry continued the expansion that started early in 1976,
reflecting the 2 million housing unit starts in 1977 (including a record
1.45 million singleunit starts). Output of crude gypsum increased 12% to
13.4 million tons, Pro- 
duction of calcined gypsum increased 14% to 12.6 million tons. Sales of gypsum
proW ducts increased 14% to 20.5 million tons. Imports of crude gypsum increased
14% to 7.1 million tons. Total value of gypsum products sold increased 39%
to $911 million. 
Table 1.—.Salient gypsum statistics 
(Thousand short tons and thousand dollars) 
fl 
1973 
1974 
1975 
1976 
1977 
United States: 
Active mines and plants'                     
Crude: 
112 
116 
110 
117 
115 
Mined                               
 Value                            
Imports for consumption                 Byproduct gypsum sales          
Calcined: 
13,558 
$56,650 
 7,661 
 322 
11,999 
$52,894 
 7,424 
463 
 9,751 
$44,654 
 5,448 
 369 
11,980 
$59,888 
 6,231 
573 
13,390 
$74,341 
 7,074 
797 
Produced                             
Value                            
 Products sold (value)                        
 Exports (value)                            
 Imports for consumption (value)              World:Production          
 12,592 
$205,326 
$632,809 
 $7,360 
$21,937 
 67,829 
 10,993 
$205,713 
$623,102 
$10,844 
$21,889 
 67,704 
9,181 
$186,478 
T$525051 
 $10,481 
 $19,817 
 T65,V9 
 11,036 
$236,775 
$654,860 
$32,594 
$21,756 
r69,175 
 12,590 
$277,835 
$910,526 
$15,703 
$31,398 
 72,164 
 rEavi~ 
 ' Each mine, calcining plant, or combination mine and plant is counted as
one establishment; includes plants that sold byproduct gypsum. 
DOMESTIC PRODUCTION 
 The United States was the world's lead- production. Stocks of crude ore
at mines at ing producer of gypsum, accounting for 18% yearend were 2.6 million
tons. 
of the total world output. Leading companies were United States Forty-two
companies mined crude gyp- Gypsum Co. (12 mines), National Gypsum 
sum at 69 mines in 22 States. Output Co. and Georgia-Pacific Corp. (6 mines
increased 12% and was only 1% below the each), Celotex Div. of Jim Walter
Corp. (4 1973 record. Leading producing States were mines), The Flintkote
Co. (3 mines), and H. Michigan, Texas, California, Iowa, Nevada, M. Holloway
Inc. (1 mine). These 6 cornand Oklahoma. These six States produced panies,
operating 32 mines, produced 71% more than 1 million tons each and together
of the total crude gypsum. 
accounted for 70% of the total domestic Leading individual mines were United


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