Gypsum is mined at three locations in Wyoming. Mountain Cement mines small amounts of gypsum near Laramie for use as a retardant in cement. Two plants in the Bighorn Basin of northwest Wyoming mine gypsum and process it into wallboard at nearby plants. The gypsum wallboard plants in Wyoming, the Georgia-Pacific Himes gypsum mill and the BPB Cody gypsum mill, have operated at capacity since 1995. Construction booms in the Wyoming market areas of the Colorado Front Range, Utah Wasatch Front, and Pacific Northwest have increased the demand for construction materials, including wallboard. Gypsum production declined in 2000 due to reduced demand, corporate restructuring, and plant maintenance. Celotex sold its gypsum mining and wallboard production to British Paper Board Ltd. (BPB), which now operates the Cody facilities under the BPB name. Wyoming has large gypsum resources capable of supporting additional production.

Gypsum-bearing formations, quarries, mills in Wyoming

BPB Cody gypsum plant. Reclamation at BPB gypsum mine south of Cody.
BPB Cody gypsum plant. Reclamation at BPB gypsum mine south of Cody.

For more information about gypsum, visit the following company site:

Georgia-Pacific Corporation

Recommended Reference Material

WSGS Preliminary Report 9, Gypsum deposits in the Cody area, by J.M. Bullock and W.H. Wilson, 1969, 1 plate, 12 p.