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Bison Materials LLC operator

Controlled by Spencer Gene Hopper; Lucas Hopper

MSHA operator ID: 0106185

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Email me when a new MSHA incident is filed at any Bison Materials LLC mine.

Fatalities: 1
Total incidents: 4
Mines on record: 1
Years on record: 2019–2025

Compliance record

MSHA citations since 2010

218

citations

significant & substantial

$325,063

proposed penalties

$204,112

paid to date

Source: MSHA violations data, updated weekly.

Top causes

MACHINERY 1 fatality · 1 non-fatal
POWERED HAULAGE 1 non-fatal
STEPPING OR KNEELING ON OBJECT 1 non-fatal

Incident timeline

2025

2024

2023

1 (1f)

2019

Mines on record

Bison No 1 OK

Fatalities under this operator

1 recorded

December 14, 2023 OK · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech Fatality · MACHINERY

Bison Materials LLC · 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.