Other notable statistics include the following:
- Twenty coal mining deaths occurred in 2013, the same number as took place in 2012.
- There were 22 metal/nonmetal mining fatalities in 2013, compared with 16 in 2012.
- Only four mining deaths in 2013 involved contractors, marking the lowest number of contractor deaths since data collection began in 1983.
- Fourteen coal mining deaths occurred underground and six occurred at surface operations.
- Five metal/nonmetal mining fatalities occurred underground compared with 17 that occurred at surface operations.
- The most common causes of mining incidents in 2013 involved machinery and powered haulage equipment.
- West Virginia was the state with the greatest number of coal mining deaths (six).
- Kentucky showed the most metal/nonmetal mining deaths (four).
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