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Longwall coal mine – Twentymile – Colorado

Producer of

Steam coal


Colorado, USA


Peabody Energy (100%)

Geology type

Upper Cretaceous coal measures

Mineral type

Low-sulphur, low-ash bituminous coal

Reserve base

100Mt-plus in current mine plan area

Annual production

8.7Mt (2005)

Mining method

Single longwall unit with supporting continuous miner development sections

Processing method

Crushing and screening run-of-mine coal before shipment; minor washing to produce industrial-grade products




Long-Airdox Electra 3000 shearer

Deutsche Bergbau Technik face supports, armoured face conveyor, stage loader and crusher

Joy continuous miners and shuttle cars

Stamler feeder-breakers

Fletcher rockbolting rigs

Continental Conveyor belt conveyors


Union Pacific Railroad

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