Kemmerer Mine
Owner
Mine Contact
Jeff Lowe, General Mine Manager, (307) 828-2220, P.O. Box 950, Kemmerer, WY 83101
Location
Lincoln County, Wyoming
Rail Loading Point
Elkol, Wyoming
Background on Mine
Kemmerer mine's "Big Pit"--one of three at the complex--was begun in 1971 and is the largest open pit coal mine in the United States. It measures 5,000 feet long, 4,000 feet wide and 1,000 feet deep. Coal is produced from the Adaville formation from multiple coal seams that dip from 17 to 23 degrees. Such mining requires unique engineering and operating plans to produce the coal competitively. Remaining reserves at Kemmerer are in excess of 100 million tons.
In March 1997, FMC's Skull Point mine, which was located adjacent to the Kemmerer mine, was acquired by Chevron Mining Inc. and has now been integrated into Kemmerer's operations.
Mine Type
Open pit
Annual Production (1999)
4.3 million tons
Current Annual Production Capacity
4.8 million tons
Weighing System
Certified belt scale
Sampling
ASTM mechanical sampler with on-site laboratory. Coal is sampled in-seam and again at the loadout. On-line analyzers provide capability of loading various blends of coal.
Loading Rate per Hour
600-800 tons
Coal Specifications
9,500-10,000 Btu/lb. 0.6-1.0% Sulphur
| proximate Analysis (%) | |
| Moisture | 21-23 |
| Ash | 4-6 |
| ultimate Analysis (%) | |
| Ash | 4-6 |
| Carbon | 68-73 |
| Hydrogen | 5-6 |
| Oxygen | (difference) |
| Sulphur | 0.6-1.0 |
| Chlorine | 0.0-0.02 |
| Nitrogen | 0.7-1.5 |
| mineral Analysis of ash (%) | |
| Silica | 54.0 |
| Alumina | 14.0 |
| Titania | 0.7 |
| Ferric Oxide | 8.0 |
| Lime | 8.5 |
| Magnesia | 3.0 |
| Potassium Oxide | 0.6 |
| Sodium Oxide | 0.8 |
| Sulphur Trioxide | 10.0 |
| Phos. Pentoxide | 0.5 |
| Magnesium Oxide | 0.1 |
| fusion temperature of ash (°F) | ||
| Reducing | Oxidizing | |
| Initial Deformation | 2,160 | 2,160 |
| Softening (H=W) | 2,200 | 2,200 |
| Softening (H=1/2W) | 2,250 | 2,250 |
| Fluid | 2,400 | 2,400 |
| other characteristics | |
| T250 temperature | 2,520 |