Caballo Rojo


Cloud Peak Energy


22 miles southeast of Gillette, Wyoming

Rail Loading Point

Rojo Junction, Wyoming (Campbell County)

Mine Type

Surface dragline operation

Recoverable Reserves

355 million tons

Annual Production

1995--16.8 million tons
1996--15.1 million tons

Current Annual Production Capacity

Permitted for 30 million tons

Rail Loading Point Storage Capacity

28,000 tons (two silos).

Loadout Description and/or Configuration

Flood loading. Two trains can be loaded simultaneously.

Weighing System

Weigh-in-motion track scales and precision top-off system.

Loading Rate per Hour

8,000 tons (4,000 tons per loadout)

Storage Recharge Rate

4,000 tons per hour

Load Track Configuration and Capacity

Two loop tracks capable of holding four unit trains on site.

Coal Specifications

Sub-bituminous, 8,450 Btu/lb., 0.32% Sulphur

proximate analysis (%) 
Typical as Received:
Moisture 30.15
Ash 5.15
Volatile Matter 30.57
Fixed Carbon 33.81
Fusion Temperature of ash (°F) 
Reducing atmosphere:
Initial 2,056
Fluid 2,142
other characteristics
Sodium as % of Ash 1.60
Size 2" x 0"