Mining Incidents

Bison Materials LLCOperator

Controlled by Spencer Gene Hopper; Lucas Hopper
MSHA Operator ID: 0106185
Fatalities
1
Total incidents
4
Mines on record
1
Years on record
2019–2025

Safety benchmark

Recorded fatalities relative to other operators with a fatal MSHA history. Percentile is computed across the 739 operators with at least one recorded fatality.

Fatality-count percentile
0th

More recorded fatalities than 0% of operators on file.

Rank
#374of 739

Position when operators are sorted by recorded fatalities.

Vs industry mean
0.6×

Industry mean: 1.6 fatalities per fatal-history operator.

This operator
1
Industry mean
1.6
Industry median
1
Peers at similar incident volume

Methodology: percentile and rank computed across MSHA operators 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.

For counsel + compliance teams

Get an email the moment a new MSHA-reportable accident lands at any mine on file under Bison Materials LLC. Useful for 105(c) defense intake, FMSHRC docket prep, and active client monitoring.

Top causes

  • MACHINERY1 fatality · 1 non-fatal
  • STEPPING OR KNEELING ON OBJECT1 non-fatal
  • POWERED HAULAGE1 non-fatal

Incident timeline

2025
1
2024
1
2023
1 (1f)
2019
1

Mines on record

Fatalities under this operator

1 recorded
Caught in, under or between a moving and a stationary object

Miner was moving a rinse bucket to access a piece of metal that needed to be repaired and welded. As EE pulled the pin from the rinse bucket somehow the hydraulic cylinder gave way pinning the miner in between the bucket and a handrail. Resulting in the death of the miner.