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: 279 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
TMC Inc. has $1K in proposed MSHA penalties and $0 outstanding across 0 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.
$1K
proposed penalties
$1K
current assessed
$1K
paid to date
$0
outstanding
11 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2018-10-04.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
Violation severity profile
ⓘShares are computed over citations that carry the MSHA gravity and negligence coding; a small share of records are uncoded.
Source: MSHA violations gravity and negligence coding, updated weekly.
Health sampling
ⓘA sample is a point in time compliance measurement, not an individual exposure history. These figures describe MSHA sampling records and do not establish causation or personal dose.
Metal and nonmetal contaminants (personal samples)
ⓘMany samples are screening measurements of substances with no applicable exposure limit; they are counted as samples but excluded from every over-limit figure. Over-limit shares use only limit-tested samples.
Last sampled: 2018-06-05, 8 years ago
3
samples
0
limit-tested
Most sampled contaminants
Respirable dust, <.1mg2
Fibers, >5um1
Show the individual readings (3)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2018-06-05
Respirable dust, <.1mg
0
Front-end Loader Operator
2009-10-22
Respirable dust, <.1mg
0
Front-end Loader Operator
2009-06-09
Fibers, >5um
0.01
Front-end Loader Operator
Area samples (mill and shop air)
Last sampled: 2014-07-09, 12 years ago
1
samples
Show the individual readings (1)
Date
Contaminant
Concentration
Limit
Conc / limit
Area sampled
2014-07-09
Respirable dust, <.1mg
0
SF GENERAL
Source: MSHA respirable dust, quartz, and noise sampling records, updated weekly. Metal/nonmetal contaminant figures come from MSHA's Personal Health Samples and Area Samples files (public record), updated weekly.
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year
Employees
2026
2
2025
2
2024
2
2023
2
2022
2
2021
2
2020
2
2019
2
2018
2
2017
2
2016
2
2015
2
2014
2
2013
2
2012
2
2011
3
2010
2
2009
2
2008
2
2007
3
2006
4
2005
4
2004
3
Source: MSHA quarterly employment and production, updated weekly.
TMC Inc. sits in Gallatin County, Montana, where the Census mining category is 0.3% of county employment.
Local economic context
ⓘCounty figures come from the US Census Bureau's American Community Survey, 5-year pooled estimates, so the 2023 vintage covers 2019 through 2023. The Census category is 'mining, quarrying, and oil and gas extraction', which is broader than MSHA jurisdiction and includes oil and gas workers no mine employs. These figures describe the surrounding county, not this mine, and are not a factor in any specific incident.
Gallatin County, Montana · Population 122,194
0.3%
Mining share of county employment
$87,454
Median household income
Source: US Census Bureau, American Community Survey 2023 5-year estimates.
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
2026 Q2
183
0
0
0.0
2026 Q1
120
0
0
0.0
2025 Q4
282
0
0
0.0
2025 Q3
246
0
0
0.0
2025 Q2
282
0
0
0.0
2025 Q1
113
0
0
0.0
2024 Q4
253
0
0
0.0
2024 Q3
253
0
0
0.0
Show 81 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
300
0
0
0.0
2024 Q1
223
0
0
0.0
2023 Q4
277
0
0
0.0
2023 Q3
310
0
0
0.0
2023 Q2
481
0
0
0.0
2023 Q1
184
0
0
0.0
2022 Q4
222
0
0
0.0
2022 Q3
300
0
0
0.0
2022 Q2
281
0
0
0.0
2022 Q1
137
0
0
0.0
2021 Q4
327
0
0
0.0
2021 Q3
295
0
0
0.0
2021 Q2
436
0
0
0.0
2021 Q1
182
0
0
0.0
2020 Q4
195
0
0
0.0
2020 Q3
174
0
0
0.0
2020 Q2
221
0
0
0.0
2020 Q1
128
0
0
0.0
2019 Q4
153
0
0
0.0
2019 Q3
182
0
0
0.0
2019 Q2
258
0
0
0.0
2019 Q1
76
0
0
0.0
2018 Q4
276
1
0
3623.2
2018 Q3
315
0
0
0.0
2018 Q2
296
0
0
0.0
2018 Q1
146
0
0
0.0
2017 Q4
229
1
0
4366.8
2017 Q3
335
0
0
0.0
2017 Q2
311
0
0
0.0
2017 Q1
139
0
0
0.0
2016 Q4
306
0
0
0.0
2016 Q3
255
0
0
0.0
2016 Q2
311
0
0
0.0
2016 Q1
194
0
0
0.0
2015 Q4
250
1
0
4000.0
2015 Q3
292
0
0
0.0
2015 Q2
277
0
0
0.0
2015 Q1
221
0
0
0.0
2014 Q4
145
0
0
0.0
2014 Q3
297
0
0
0.0
2014 Q2
226
0
0
0.0
2014 Q1
119
1
0
8403.4
2013 Q4
202
0
0
0.0
2013 Q3
257
0
0
0.0
2013 Q2
514
0
0
0.0
2013 Q1
1
0
0
0.0
2012 Q4
430
0
0
0.0
2012 Q3
535
0
0
0.0
2012 Q2
319
0
0
0.0
2012 Q1
126
3
1
23809.5
2011 Q4
653
0
0
0.0
2011 Q3
568
0
0
0.0
2011 Q2
593
0
0
0.0
2011 Q1
97
0
0
0.0
2010 Q4
352
0
0
0.0
2010 Q3
426
0
0
0.0
2010 Q2
534
0
0
0.0
2010 Q1
191
0
0
0.0
2009 Q4
618
2
0
3236.2
2009 Q3
760
0
0
0.0
2009 Q2
369
0
0
0.0
2009 Q1
264
0
0
0.0
2008 Q4
498
0
0
0.0
2008 Q3
617
0
0
0.0
2008 Q2
436
0
0
0.0
2008 Q1
358
0
0
0.0
2007 Q4
616
1
0
1623.4
2007 Q3
852
0
0
0.0
2007 Q2
695
0
0
0.0
2007 Q1
509
0
0
0.0
2006 Q4
508
1
0
1968.5
2006 Q3
766
0
0
0.0
2006 Q2
689
0
0
0.0
2006 Q1
162
0
0
0.0
2005 Q4
410
0
0
0.0
2005 Q3
914
0
0
0.0
2005 Q2
646
0
0
0.0
2005 Q1
105
0
0
0.0
2004 Q4
332
0
0
0.0
2004 Q3
610
0
0
0.0
2004 Q2
497
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
1 on file
2024 · 1 incident
May 16, 2024MT · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerSLIP OR FALL OF PERSON