Number of mines

What is Number of mines?

Number of mines meaning The number of mines, or mines collocated with preparation plants or tipples, located in a particular geographic area (State or region). If a mine is mining coal across two counties within a State, or across two States, then it is counted as two operations. This is done so that EIA can separate production by State and county.


reference: Glossary – U.S. Energy Information Administration (EIA)