You will need to zoom in to view the individual coal mines in each region of country. Warmer color balloons are mines that produced the greatest tonnage of coal in 2014. Click on balloons to see mine name, tonnage produced, underground versus strip mining, and other information about each mine.

Data Source: Energy Information Agency - Coal Mines, Surface and Underground All operating surface and underground coal mines in the United States (2014).
https://www.eia.gov/maps/layer_info-m.php