Specifications - Black Thunder Coal Mine, WY, USA

Key Data
Producer of	Steam coal
Location	70km south of Gillette, Wyoming, USA
Ownership	Arch Coal Inc.
Geology type	Palaeocene (Early Tertiary) coal measures
Mineral type	Sub-bituminous coal
Reserve base	1,650Mt-plus
Annual production	56.8Mt (2003), currently producing at a rate of 91Mt/y
Mining method	Single-seam open pit
Coal processing	Crushing only
Employment	425
Key Equipment
	Bucyrus-Erie 2570WS, 1570W and 1300W walking draglines
	P&H 2800 mining shovels
	Marion (now B-E) 351M mining shovel
	Liebherr T-262, TI-272 and T-282 haul trucks
	Komatsu 930E haul trucks
	Tamrock Driltech blasthole drills
	Caterpillar and Komatsu dozers
	Caterpillar and Komatsu wheel loaders
	Caterpillar 16G road graders
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