Silt, culm, refuse bank, or slurry dam mining
- A mining operation producing coal from these sources of coal.U.S. Dept. of Energy, Energy Information Administration's Energy Glossary
Energy terms . 2014.
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Number of mining operations — The number of mining operations includes preparation plants with greater than 5,000 total direct labor hours. Mining operations that consist of a mine and preparation plant, or a preparation plant only, will be counted as two operations if the… … Energy terms