Black Hills Bentonite LLC operator
Controlled by
BHB Limited Partnership; A&M Products
MSHA operator ID: L09605
- Fatalities
- 0
- Total incidents
- 442
- Mines on record
- 8
- Years on record
- 1988–2026
Compliance record
MSHA citations since 2000
1,015
citations
250
significant & substantial
$364,175
proposed penalties
$289,253
paid to date
79% of proposed penalties paid to date, a $74,922 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
623
inspections on record
9,865
inspection hours
10.3
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.1,015 citations across 9,865 inspection hours.
Source: MSHA inspections data, updated weekly.
Penalty disposition
ⓘ
Differences between proposed and paid penalties reflect both settlements and conference reductions and amounts still owed. Outstanding is the balance currently owed.$364K
proposed penalties
$291K
current assessed
$289K
paid to date
$2K
outstanding
990 assessments are final orders; 14 contested dockets.
As of the most recent assessment on 2026-05-12.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
Top causes
- HANDLING OF MATERIALS 167 non-fatal
- SLIP OR FALL OF PERSON 112 non-fatal
- POWERED HAULAGE 56 non-fatal
- MACHINERY 41 non-fatal
- HANDTOOLS (NONPOWERED) 35 non-fatal
- OTHER 12 non-fatal
Incident timeline
2026
4
2025
3
2024
13
2023
12
2022
8
2021
8
2020
5
2019
9
2018
6
2017
7
2016
3
2015
7
2014
9
2013
13
2012
6
2011
12
2010
12
2009
13
2008
12
2007
8
2006
10
2005
12
2004
7
2003
6
2002
11
2001
6
2000
12
1999
11
1998
14
1997
34
1996
8
1995
16
1994
29
1993
24
1992
23
1991
25
1990
15
1989
5
1988
4
Mines on record
- Kaycee Mine WY
- Casper Plant WY
- TENSLEEP MINE WY
- Mills Plant WY
- WORLAND PLANT WY
- Thornton Plant WY
- HT Plant WY
- OSHOTO MINE WY
Watch this operator
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For insurers, brokers, and safety consultants
The full compliance file on Black Hills Bentonite LLC
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.