Recorded fatalities relative to other controllers with a fatal MSHA history. Percentile is computed across the 590 controllers with at least one recorded fatality.
More recorded fatalities than 0% of controllers on file.
Position when controllers are sorted by recorded fatalities.
Industry mean: 2.0 fatalities per fatal-history controller.
Methodology: percentile and rank computed across MSHA controllers with at least one recorded fatality. Industry mean is the average across that same population. Peers are sampled by closest total-incident count, regardless of fatality outcome.
The crew had drilled a chain hole and connected a chain to lift the block a short distance to break away from the ledge. When this occurred, grout rock remaining on the ledge above to miners broke loose and fell striking both of them, fatally injuring one and seriously injuring the second miner. The grout rock was left from the previous day, and was examined and determined safe.