What are O'Brien Pit's MSHA penalties?

O'Brien Pit has $5K in proposed MSHA penalties on record, with $0 currently outstanding across 0 contested dockets.

O'Brien Pit: 48 MSHA citations Metal/Non-Metal

RMR Aggregate Inc · Surface

Controlled by Raymond T O'Brien

Conrad, Pondera County, MT · Intermittent

MSHA Mine ID: 2402219

O'Brien Pit has $5K in proposed MSHA penalties and $0 outstanding across 0 contested dockets, plus health sampling and the full incident record.

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Fatalities: 0
Total incidents: 0
Years on record: —
Latest incident: —

Compliance record

MSHA citations since 2002

citations

significant & substantial

$5,004

proposed penalties

$5,004

paid to date

100% of proposed penalties paid to date, a $0 gap.

Source: MSHA violations data, updated weekly.

Inspection activity

MSHA inspections since 2002

inspections on record

355

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: 355 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.

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.

$5K

proposed penalties

$5K

current assessed

$5K

paid to date

outstanding

48 assessments are final orders; 0 contested dockets.

As of the most recent assessment on 2025-08-06.

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.

8.3%

significant & substantial

6.2%

high negligence or reckless

8.3%

reasonably likely or greater

20.8%

permanently disabling or fatal if injury occurs

Negligence coding: 0.0% none, 25.0% low, 68.8% moderate, 6.2% high, 0.0% reckless.

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: 2018-01-24, 8 years ago

of limit-tested samples over the exposure limit

samples

limit-tested

Most sampled contaminants

Respirable dust, <.1mg3
Unlisted Particulate, respirable, <1% Qtz2
Quartz, respirable, >1% Qtz1

Show the individual readings (6)

Date	Contaminant	Concentration	Limit	Conc / limit	Occupation
2018-01-24	Respirable dust, <.1mg	0			Front-end Loader Operator
2014-10-29	Unlisted Particulate, respirable, <1% Qtz	0.13			Front-end Loader Operator
2014-10-29	Respirable dust, <.1mg	0			Supervisor, Co. Official
2014-10-29	Unlisted Particulate, respirable, <1% Qtz	0.2			Welder, etc.
2008-10-16	Respirable dust, <.1mg	0			Front-end Loader Operator
2008-10-16	Quartz, respirable, >1% Qtz	0.2	0.52	0.38	Cleanup Man

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.

Ownership history

RMR Aggregate Inc 2001 to present

Source: MSHA controller and operator history, updated weekly.

Workforce and production

Year	Employees
2026	3
2025	2
2024	2
2023	2
2022	3
2021	1
2020	2
2019	2
2018	2
2017	3
2016	2
2015	2
2014	2
2013	2
2012	3
2011	2
2010	2
2009	2
2008	3
2007	3
2006	2
2005	2
2004	2
2003	2
2002	1
2001	1

Source: MSHA quarterly employment and production, updated weekly.

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.

Pondera County, Montana · Population 6,012

1.6%

Mining share of county employment

$53,500

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	Per 1M hrs
2026 Q2	806	0	0.0
2026 Q1	100	0	0.0
2025 Q4	220	0	0.0
2025 Q3	200	3	15000.0
2024 Q4	160	0	0.0
2024 Q3	480	0	0.0
2024 Q2	240	0	0.0
2024 Q1	0	0

Show 86 earlier quarters

Quarter	Hours worked	Citations	S&S	Per 1M hrs
2023 Q4	320	0	0	0.0
2023 Q3	740	0	0	0.0
2023 Q2	420	2	0	4761.9
2022 Q3	650	0	0	0.0
2022 Q2	480	0	0	0.0
2022 Q1	115	1	0	8695.7
2021 Q4	40	0	0	0.0
2021 Q3	360	0	0	0.0
2021 Q2	840	1	0	1190.5
2021 Q1	0	0	0
2020 Q4	125	0	0	0.0
2020 Q3	365	3	0	8219.2
2020 Q2	820	0	0	0.0
2019 Q3	640	0	0	0.0
2019 Q2	420	1	1	2381.0
2019 Q1	0	0	0
2018 Q4	80	0	0	0.0
2018 Q3	510	0	0	0.0
2018 Q2	480	2	0	4166.7
2018 Q1	40	1	0	25000.0
2017 Q4	610	0	0	0.0
2017 Q3	860	0	0	0.0
2017 Q2	1,240	0	0	0.0
2017 Q1	920	1	0	1087.0
2016 Q4	640	0	0	0.0
2016 Q3	1,060	0	0	0.0
2016 Q2	1,260	0	0	0.0
2016 Q1	0	0	0
2015 Q4	400	11	1	27500.0
2015 Q3	870	0	0	0.0
2015 Q2	920	0	0	0.0
2015 Q1	80	0	0	0.0
2014 Q4	480	4	1	8333.3
2014 Q3	1,240	0	0	0.0
2014 Q2	960	0	0	0.0
2014 Q1	0	0	0
2013 Q4	310	0	0	0.0
2013 Q3	640	0	0	0.0
2013 Q2	1,440	1	0	694.4
2013 Q1	425	0	0	0.0
2012 Q4	560	0	0	0.0
2012 Q3	960	0	0	0.0
2012 Q2	1,080	0	0	0.0
2012 Q1	360	2	0	5555.6
2011 Q4	600	0	0	0.0
2011 Q3	1,480	0	0	0.0
2011 Q2	480	3	1	6250.0
2011 Q1	40	0	0	0.0
2010 Q4	80	0	0	0.0
2010 Q3	640	0	0	0.0
2010 Q2	720	0	0	0.0
2010 Q1	0	0	0
2009 Q4	620	2	0	3225.8
2009 Q3	1,240	0	0	0.0
2009 Q2	800	0	0	0.0
2009 Q1	120	0	0	0.0
2008 Q4	110	4	0	36363.6
2008 Q3	785	0	0	0.0
2008 Q2	840	0	0	0.0
2008 Q1	320	0	0	0.0
2007 Q4	480	0	0	0.0
2007 Q3	876	0	0	0.0
2007 Q2	940	0	0	0.0
2007 Q1	760	0	0	0.0
2006 Q4	415	0	0	0.0
2006 Q3	576	0	0	0.0
2006 Q2	1,060	0	0	0.0
2006 Q1	345	0	0	0.0
2005 Q4	280	0	0	0.0
2005 Q3	585	0	0	0.0
2005 Q2	640	0	0	0.0
2005 Q1	140	0	0	0.0
2004 Q4	920	0	0	0.0
2004 Q3	1,170	0	0	0.0
2004 Q2	780	0	0	0.0
2004 Q1	400	0	0	0.0
2003 Q4	420	1	0	2381.0
2003 Q3	285	0	0	0.0
2003 Q2	320	0	0	0.0
2003 Q1	103	0	0	0.0
2002 Q4	60	4	0	66666.7
2002 Q3	124	1	0	8064.5
2002 Q2	128	0	0	0.0
2002 Q1	214	0	0	0.0
2001 Q4	25	0	0	0.0
2001 Q3	110	0	0	0.0

No reportable incidents on file.

MSHA has no recorded reportable accidents for this mine in the current dataset. New reports appear here within a week of being filed.

Watch this mine

O'Brien Pit has $5K in proposed MSHA penalties and $0 outstanding across 0 contested dockets.

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.

O'Brien Pit sits in Pondera County, Montana, where the Census mining category is 1.6% of county employment.

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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.