Cloud Peak Energy


70 miles south of Gillette, Wyoming

Rail Loading Point

Converse Junction, Wyoming (Converse County)

Mine Type

Surface dragline operation

Recoverable Reserves

237 million tons

Annual Production

1995--10.9 million tons
1996--12.0 million tons

Current Annual Production Capacity

Permitted for 30 million tons

Rail Loading Point Storage Capacity

27,500 tons (silo)

Weighing System

Batch weigh bin coupled with weigh-in-motion track scales.

Loading Rate per Hour

4,000 tons

Storage Recharge Rate

2,300 tons per hour (up to 6,000 tons per hour in late 1997)

Load Track Configuration and Capacity

Loop track capable of holding two unit trains on site.

Coal Specifications

Sub-bituminous, 8,800 Btu/lb., 0.22% Sulphur

proximate analysis (%) 
Typical as Received:
Moisture 26.50
Ash 5.25
Volatile Matter 31.75
Fixed Carbon 36.2
Fusion Temperature of ash (°F) 
Reducing atmosphere:
Initial 2,130
Fluid 2,185
other characteristics
Sodium as % of Ash 1.41
Size 3" x 0"