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Other Mining Operations

In addition to gypsum mining operations, the company has had limestone mines to support its cement division. These were located in Kimballton, VA; Bellefonte, PA; Alpena, MI; and Evanstown, PA.

Pyrophyllite was mined in St. John's, Nova Scotia. American Olean used it to produce ceramic tile.

Asbestos was mined in Thetford, Quebec.