Twentymile Mine


Peabody Group

Mine Contact

Pat Sollars, Mine Manager
Twentymile Coal Company
29515 Routt County Road #27
Oak Creek, CO 80467
(970) 879-3800


Oak Creek, Colorado, 16 miles southwest of Steamboat Springs in Routt County.

Rail Loading Point

Energy, Colorado

Mine Background

Twentymile's Foidel Creek mine began operation in 1983. A new state-of-the-art longwall system was installed in 1996, and a sophisticated batch-weigh loading system was also completed that year. This union-free mine produces high-Btu, low-sulphur steam and stoker coals for both utility and industrial customers.

Mine Type

Underground longwall

Recoverable Reserves

80 million tons

Annual Production (2001)

7,500,000 tons

Current Annual Production Capacity

8.5-9.0 million tons

Rail Loading Point Storage Capacity

One million plus tons

Loadout Description and/or Configuration

Batch weigh loadout with open stockpile feed.

Weighing System

Batch weigh bin and coupled-in-motion track scale.

System Used to Assure Maximum Loading per Car

Batch system

Loading Rate per Hour

5,500 tons, 115-car unit train within three hours.

Load Track Configuration and Capacity

Single-ended loading track with adjacent run-around capable of handling two 115-car trains.

Loading Mode

Downgrade coupled load in motion with train in buff against locomotive.

Maximum Cars per Train

115 cars

Washing Capability


Coal Specifications

Steam Bituminous: 11,350 Btu/lb., 0.50% Sulphur
Stoker Bituminous: 11,400 Btu/lb, 0.41% Sulphur

Composition analysis (%) 
Steam Coal as Received:
Moisture 9.5
Ash 9.8
Volatile Matter 36.0
Fixed Carbon 44.5
Ultimate Analysis (%)
Steam Coal (dry):
Ash 10.8
Carbon 71.1
Hydrogen 4.9
Oxygen 11.4
Sulphur 0.55
Chlorine 0.01
Fusion Temperature of ash (°F) 
Steam :
Softening (H=W) 2,580
Other characteristics
  Steam Stoker
Hardgrove Grindability Index 45 46
Sizing 2"x0" 1 1/4" x 1/4"