Bison No 1 has $322K in proposed MSHA penalties and $88K outstanding across 1 contested dockets, plus health sampling and the full incident record.
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Fatalities
1
Total incidents
4
Years on record
2019–2025
Latest incident
Jul 2025
Compliance record
MSHA citations since 2010
201
citations
47
significant & substantial
$322,323
proposed penalties
$205,666
paid to date
64% of proposed penalties paid to date, a $116,657 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2010
45
inspections on record
897
inspection hours
n/a
citations per 100 inspection hours
ⓘThis rate is recorded citations divided by MSHA inspection hours, per 100 hours. It reflects inspection effort, not mine size or production.
Rate withheld: 897 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Bison No 1 has $322K in proposed MSHA penalties and $88K outstanding across 1 contested dockets.
Penalty disposition
ⓘDifferences between proposed and paid penalties reflect both settlements and conference reductions and amounts still owed. Outstanding is the balance currently owed.
$322K
proposed penalties
$294K
current assessed
$206K
paid to date
$88K
outstanding
179 assessments are final orders; 1 contested dockets.
As of the most recent assessment on 2025-11-25.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
Quarterly safety rates
ⓘCitations per million reported employee-hours. Rates begin in 2000, when MSHA's quarterly employment data starts; earlier incidents are counted but cannot be rate-adjusted. Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.
Citations per million employee-hours, as reported to MSHA
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2025 Q4
10,190
4
0
392.5
2025 Q3
8,156
1
1
122.6
2025 Q2
7,474
5
1
669.0
2025 Q1
7,246
2
1
276.0
2024 Q4
8,111
0
0
0.0
2024 Q3
9,015
5
2
554.6
2024 Q2
8,214
0
0
0.0
2024 Q1
7,240
7
1
966.9
Show 57 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2023 Q4
9,543
4
1
419.2
2023 Q3
7,912
7
0
884.7
2023 Q2
9,311
0
0
0.0
2023 Q1
10,443
0
0
0.0
2022 Q4
11,668
4
0
342.8
2022 Q3
11,548
0
0
0.0
2022 Q2
12,276
4
0
325.8
2022 Q1
12,970
7
4
539.7
2021 Q4
12,965
0
0
0.0
2021 Q3
12,950
5
2
386.1
2021 Q2
10,669
0
0
0.0
2021 Q1
10,374
4
0
385.6
2020 Q4
10,281
0
0
0.0
2020 Q3
10,366
11
3
1061.2
2020 Q2
10,696
1
0
93.5
2020 Q1
11,398
0
0
0.0
2019 Q4
11,635
18
6
1547.1
2019 Q3
12,599
0
0
0.0
2019 Q2
11,138
3
0
269.3
2019 Q1
10,000
4
1
400.0
2018 Q4
12,145
0
0
0.0
2018 Q3
10,721
10
2
932.7
2018 Q2
11,341
0
0
0.0
2018 Q1
8,149
6
1
736.3
2017 Q4
5,042
0
0
0.0
2017 Q3
9,871
15
6
1519.6
2017 Q2
9,779
0
0
0.0
2017 Q1
9,741
0
0
0.0
2016 Q4
8,612
1
1
116.1
2016 Q3
5,648
6
3
1062.3
2016 Q2
7,367
0
0
0.0
2016 Q1
7,337
0
0
0.0
2015 Q4
7,214
5
1
693.1
2015 Q3
7,473
5
1
669.1
2015 Q2
8,097
0
0
0.0
2015 Q1
7,173
6
2
836.5
2014 Q4
7,613
0
0
0.0
2014 Q3
8,033
0
0
0.0
2014 Q2
7,733
0
0
0.0
2014 Q1
7,964
1
0
125.6
2013 Q4
6,880
0
0
0.0
2013 Q3
6,436
2
0
310.8
2013 Q2
5,418
0
0
0.0
2013 Q1
3,578
0
0
0.0
2012 Q4
4,137
3
0
725.2
2012 Q3
4,992
3
1
601.0
2012 Q2
4,851
0
0
0.0
2012 Q1
3,498
2
0
571.8
2011 Q4
3,120
2
0
641.0
2011 Q3
3,129
5
1
1598.0
2011 Q2
3,027
0
0
0.0
2011 Q1
1,897
4
1
2108.6
2010 Q4
2,020
0
0
0.0
2010 Q3
2,015
2
0
992.6
2010 Q2
2,000
0
0
0.0
2010 Q1
1,855
9
2
4851.8
2009 Q4
2,791
0
0
0.0
Fatalities at this mine
1 recorded
December 14, 2023OK · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techFatality · 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.
An EE was trying to remove a bit from drill pipe on John Henry drill. IE put a pipe wrench on the bit & spun the wrench so that it was touching the ground. IE stood on the pipe wrench to keep it from moving. EE began slowly rotating the drill pipe & pipe wrench sprung upward & threw IE sideways causing EE to land on EE's side on the ground.
2024 · 1 incident
November 11, 2024OK · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorSTEPPING OR KNEELING ON OBJECT
The miner was climbing into their loader and heard something pop in their leg and then could not put weight on it. Other miners got them to the scale house and proceeded with ice on the site of pain. Miner was then sent to primary care for x-rays.
2019 · 1 incident
July 22, 2019OK · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techPOWERED HAULAGE
Mechanic was leaving the scale house on the access road to the quarry. Mechanic stated that EE "was only going 15mph and thought EE had a blowout and it jerked EE's truck (2003 GMC 1500) EE was driving to the left flipping EE where the truck came to rest on the cab upside down." Employee received stitches in EE's left eyebrow/temple area.
For insurers, brokers, and safety consultants
The full compliance file on Bison No 1
A dated report covering the 26-year penalty trail, line-item violation pattern, contest and
docket posture, rate-normalized peer benchmark, and full fatality history. Delivered as a PDF
with the underlying data as CSV.