Sufco MineThe Sufco mine, which derives its name from its former owner, Southern Utah Fuel Co is one of the longest continuously running and most productive underground longwall mines in the U.S. It has been in continuous operation since 1941, initially as a room-and-pillar coal mine and since 1985 as a high-performance longwall operation.

The Sufco mining complex is located in Sevier County, UT approximately 30 miles north east of Salina, UT and 125 miles south of Salt Lake City, UT. It is located in the Blackhawk Formation in the Wasatch Plateau coalfield in which eight coal beds have been identified that contain coal seams more than seven feet thick.


Moisture 10.50% Moisture 10.50% Reducing Silica (SiO2) 59.00%
Ash 11.00% Carbon 65.00% I.D. 2,120 Alumina (Al2O3) 13.10%
Volatile Matter 34.00% Hydrogen 4.70% H = W 2,140 Titania (TiO2) 0.80%
Fixed Carbon 44.50% Nitrogen 1.10% H = ½ W 2,160 Ferric Oxide (Fe2O3) 0.80%
BTU/lb 11,000 Chlorine 0.02% Fluid 2,270 Lime (CaO) 10.50%
Gross Kcal/Kg 6,111 Sulfur 0.55% Oxidizing Magnesia (MgO) 2.10%
Net Kcal/Kg ISO 5,811 Ash 11.00% I.D. 2,160 Potassium Oxide (K2O) 0.60%
Sulfur 0.55% Oxygen[1] 7.13% H = W 2,200 Sodium Oxide (Na2O) 2.20%
SO2/mm BTU 1.00 H = ½ W 2,250 Phosphorous Pentoxide (P2O5) 0.30%
Fluid 2,400 Sulfur Trioxide (SO3) 6.80%
Manganese Dioxide (MnO2) 0.04%

[1] By difference