Skyline Mine


Canyon Fuel Company, LLC


Near Scofield, Utah in Carbon County

Rail Loading Point

Skyline, Utah

Background on Mine

The Skyline mines complex is currently producing approximately 5 million tons per year. The complex includes three mines, which produce coal using continuous miners as well as longwall mining methods.

The entire complex involves the development of 6,400 acres of federal and county leases encompassing 270 million tons of total reserves in three major seams.

The mines share common surface facilities, including crushing, loading and conveyor systems, storage silos, offices, maintenance and analytical lab facilities. The train loading facility is a weigh bin flood loading system allowing 10,000 tons to be loaded within two hours.

Skyline produces high grade steam coal, and both oiled and unoiled stoker coal.

Mine Type

Underground/Drift/ Longwall/Room and Pillar

Recoverable Reserves

70 million tons

Current Annual Production Capacity

5.5 million tons

Rail Loading Point Storage Capacity

Preload: 30,000 tons in two 15,000 ton silos
350,000 tons total

Loadout Description and/or Configuration

Two 15,000 ton preload silos supply high-speed belts feeding a surge bin, which in turn supplies an over-track flood-loading weigh bin.

Weighing System

Flood loading weigh-bin system

Loading Rate per Hour

6,000 tons, 110-car unit train in two hours.

Load Track Configuration and Capacity

Single-ended 100-car empty track extends from double-ended 100-car load track which parallels the main track. Main track used as a runaround.

Loading Mode

Plug. Downgrade coupled load-in-motion with train in buff against locomotive.Train

Maximum Cars Per Train

110 cars

Washing Capability


Coal Specifications

11,700 Btu/lb., 0.45% Sulphur

composition Analysis (%)
  As Received
Moisture 9.5
Ash 8.5
Volatile Matter 40.5
Fixed Carbon 41.5
Size 2" x 0"
Hard Characteristics
Hardgrove Grindability Index 48
Fusion Temperature of Ash (°F) 
  Reducing Oxidizing
Initial Deformation 2,125 2,180
Softening (H=W) 2,155 2,210
Hemispherical (H=1/2W) 2,225 2,280
Fluid 2,280 2,330