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2003 INDUSTRIAL MINERALS UNDERGROUND MINING ACTIVITIES - SUMMARY BY COUNTY
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County Number of Operators Number of Mines Number of Employees Total Production (tons)
Armstrong 1 1 11 78,580
Butler 1 1 13 103,270
Centre 1 2 51 1,510,436
Fayette 2 3 138 4,049,429
Somerset 1 1 26 472,779
Westmoreland 2 3 113 3,097,405
York 1 1 25 762,640
Region Totals 9 12 377 10,074,539