Production by Mining Method (Thousand Short Tons)


Year Surface Mining Underground Mining Total
Auger Strip Total Cont. Miner Longwall Other Total
2008 249 7,884 8,133 13,018 3,019 0 16,037 24,170
2007 197 8,685 8,882 13,675 2,348 0 16,023 24,905
2006 716 9,827 10,543 14,457 4,429 0 18,886 29,429
2005 355 10,073 10,428 13,915 2,594 0 16,509 26,937
2004 405 9,617 10,022 15,322 5,142 0 20,464 30,486
2003 312 9,961 10,273 115,417 5,755 0 21,172 31,445
2002 417 8,432 8,849 17,556 5,341 0 22,897 31,746
2001 526 9,407 9,933 15,885 6,782 0 22,667 32,600
2000 1,782 7,859 9,633 17,825 5,752 0 23,577 33,210
1999 530 8,629 9,159 17,843 5,192 60 23,095 32,254
1998 385 7,657 8,042 19,238 6,359 363 25,960 34,002
1997 406 8,495 8,900 21,096 6,801 91 27,989 36,889
1996 308 9,294 9,602 22,133 4,913 134 27,180 36,782
1995 205 8,704 8,909 21,002 5,936 71 27,008 35,917
1994 332 9,039 9,371 21,271 7,317 846 29,435 38,805
1993 464 9,079 9,543 23,124 7,247 177 30,548 40,091
1992 320 7,852 8,173 24,549 9,322 518 34,389 42,562
1991 321 7,767 8,087 25,023 8,303 922 34,249 42,336
1990 157 7,488 7,646 27,339 9,998 1,518 38,854 46,500

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