Mt Gaines Consolidated · Fall to the walkway or working surface
STEPPED OUT ONTO WET PLASTIC TO GET A SAMPLE FROM THE PONDS. SLIPPED AND FELL.
MT. GAINES MINE: 52 MSHA citations Metal/Non-Metal
MT. GAINES MINE has $7K in proposed MSHA penalties and $1K outstanding across 0 contested dockets, plus health sampling and the full incident record.
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- Fatalities
- 0
- Total incidents
- 6
- Years on record
- 1987–1995
- Latest incident
- Dec 1995
Compliance record
MSHA citations since 2007
52
citations
4
significant & substantial
$6,794
proposed penalties
$5,737
paid to date
84% of proposed penalties paid to date, a $1,057 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2001
59
inspections on record
635
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: 635 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
MT. GAINES MINE has $7K in proposed MSHA penalties and $1K 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.$7K
proposed penalties
$7K
current assessed
$6K
paid to date
$1K
outstanding
52 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-06-02.
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.7.7%
significant & substantial
5.8%
high negligence or reckless
7.7%
reasonably likely or greater
50.0%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 23.1% low, 71.2% moderate, 5.8% 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: 2026-06-02
ⓘ
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.0%
of limit-tested samples over the exposure limit
4
samples
1
limit-tested
Most sampled contaminants
- Respirable dust, <.1mg3
- Quartz, respirable, >1% Qtz1
Show the individual readings (4)
| Date | Contaminant | Concentration | Limit | Conc / limit | Occupation |
|---|---|---|---|---|---|
| 2026-06-02 | Respirable dust, <.1mg | 0 | Front-end Loader Operator | ||
| 2015-10-22 | Respirable dust, <.1mg | 0 | Supervisor, Co. Official | ||
| 2015-10-22 | Quartz, respirable, >1% Qtz | 0.12 | 0.68 | 0.18 | Front-end Loader Operator |
| 2009-03-04 | Respirable dust, <.1mg | 0 | Supervisor, Co. Official |
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
- Mt Gaines Resources Inc 1986 to 1992
- Mt Gaines Consolidated 1992 to 2003
- Mt Gaines Rock 2003 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
| Year | Employees |
|---|---|
| 2026 | 4 |
| 2025 | 4 |
| 2024 | 2 |
| 2023 | 3 |
| 2022 | 4 |
| 2021 | 4 |
| 2020 | 4 |
| 2019 | 4 |
| 2018 | 3 |
| 2017 | 3 |
| 2016 | 4 |
| 2015 | 4 |
| 2014 | 3 |
| 2013 | 4 |
| 2012 | 4 |
| 2011 | 4 |
| 2010 | 3 |
| 2009 | 4 |
| 2008 | 5 |
| 2007 | 5 |
| 2002 | 1 |
| 2001 | 2 |
| 2000 | 2 |
Source: MSHA quarterly employment and production, updated weekly.
MT. GAINES MINE sits in Mariposa County, California, where the Census mining category is 0.0% 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.Mariposa County, California · Population 17,060
0.0%
Mining share of county employment
$65,378
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 Q1 | 894 | 5 | 0 | 5592.8 |
| 2025 Q4 | 1,164 | 0 | 0 | 0.0 |
| 2025 Q3 | 1,022 | 0 | 0 | 0.0 |
| 2025 Q2 | 672 | 3 | 1 | 4464.3 |
| 2025 Q1 | 542 | 0 | 0 | 0.0 |
| 2024 Q4 | 538 | 0 | 0 | 0.0 |
| 2024 Q3 | 530 | 1 | 0 | 1886.8 |
| 2024 Q2 | 530 | 0 | 0 | 0.0 |
Show 77 earlier quarters Hide earlier quarters
| Quarter | Hours worked | Citations | S&S | Per 1M hrs |
|---|---|---|---|---|
| 2024 Q1 | 570 | 0 | 0 | 0.0 |
| 2023 Q4 | 640 | 0 | 0 | 0.0 |
| 2023 Q3 | 770 | 4 | 0 | 5194.8 |
| 2023 Q2 | 958 | 0 | 0 | 0.0 |
| 2023 Q1 | 602 | 0 | 0 | 0.0 |
| 2022 Q4 | 1,030 | 0 | 0 | 0.0 |
| 2022 Q3 | 1,175 | 0 | 0 | 0.0 |
| 2022 Q2 | 1,063 | 0 | 0 | 0.0 |
| 2022 Q1 | 870 | 0 | 0 | 0.0 |
| 2021 Q4 | 678 | 0 | 0 | 0.0 |
| 2021 Q3 | 646 | 1 | 0 | 1548.0 |
| 2021 Q2 | 1,257 | 0 | 0 | 0.0 |
| 2021 Q1 | 1,120 | 1 | 0 | 892.9 |
| 2020 Q4 | 809 | 0 | 0 | 0.0 |
| 2020 Q3 | 1,071 | 0 | 0 | 0.0 |
| 2020 Q2 | 1,451 | 2 | 0 | 1378.4 |
| 2020 Q1 | 1,050 | 1 | 0 | 952.4 |
| 2019 Q4 | 818 | 0 | 0 | 0.0 |
| 2019 Q3 | 1,094 | 1 | 0 | 914.1 |
| 2019 Q2 | 1,052 | 0 | 0 | 0.0 |
| 2019 Q1 | 910 | 0 | 0 | 0.0 |
| 2018 Q4 | 794 | 0 | 0 | 0.0 |
| 2018 Q2 | 1,113 | 0 | 0 | 0.0 |
| 2018 Q1 | 1,079 | 0 | 0 | 0.0 |
| 2017 Q4 | 770 | 1 | 0 | 1298.7 |
| 2017 Q3 | 1,024 | 1 | 0 | 976.6 |
| 2017 Q2 | 1,025 | 0 | 0 | 0.0 |
| 2017 Q1 | 894 | 0 | 0 | 0.0 |
| 2016 Q4 | 1,018 | 0 | 0 | 0.0 |
| 2016 Q3 | 1,495 | 1 | 0 | 668.9 |
| 2016 Q2 | 1,674 | 6 | 1 | 3584.2 |
| 2016 Q1 | 1,181 | 0 | 0 | 0.0 |
| 2015 Q4 | 1,257 | 2 | 0 | 1591.1 |
| 2015 Q3 | 1,111 | 0 | 0 | 0.0 |
| 2015 Q2 | 1,347 | 0 | 0 | 0.0 |
| 2015 Q1 | 1,180 | 0 | 0 | 0.0 |
| 2014 Q4 | 988 | 1 | 0 | 1012.1 |
| 2014 Q3 | 1,095 | 0 | 0 | 0.0 |
| 2014 Q2 | 1,013 | 0 | 0 | 0.0 |
| 2014 Q1 | 1,058 | 1 | 0 | 945.2 |
| 2013 Q4 | 850 | 0 | 0 | 0.0 |
| 2013 Q3 | 1,090 | 0 | 0 | 0.0 |
| 2013 Q2 | 1,014 | 3 | 1 | 2958.6 |
| 2013 Q1 | 1,227 | 0 | 0 | 0.0 |
| 2012 Q4 | 1,208 | 0 | 0 | 0.0 |
| 2012 Q3 | 1,160 | 0 | 0 | 0.0 |
| 2012 Q2 | 1,094 | 0 | 0 | 0.0 |
| 2012 Q1 | 1,432 | 0 | 0 | 0.0 |
| 2011 Q4 | 1,379 | 3 | 0 | 2175.5 |
| 2011 Q3 | 1,181 | 0 | 0 | 0.0 |
| 2011 Q2 | 1,451 | 0 | 0 | 0.0 |
| 2011 Q1 | 1,249 | 2 | 0 | 1601.3 |
| 2010 Q4 | 1,277 | 0 | 0 | 0.0 |
| 2010 Q3 | 1,264 | 1 | 0 | 791.1 |
| 2010 Q2 | 1,438 | 0 | 0 | 0.0 |
| 2010 Q1 | 1,167 | 2 | 1 | 1713.8 |
| 2009 Q4 | 2,111 | 0 | 0 | 0.0 |
| 2009 Q3 | 2,026 | 0 | 0 | 0.0 |
| 2009 Q2 | 1,900 | 0 | 0 | 0.0 |
| 2009 Q1 | 1,985 | 1 | 0 | 503.8 |
| 2008 Q4 | 2,034 | 0 | 0 | 0.0 |
| 2008 Q3 | 3,026 | 0 | 0 | 0.0 |
| 2008 Q2 | 2,220 | 0 | 0 | 0.0 |
| 2008 Q1 | 1,795 | 0 | 0 | 0.0 |
| 2007 Q4 | 2,068 | 0 | 0 | 0.0 |
| 2007 Q3 | 1,721 | 3 | 0 | 1743.2 |
| 2007 Q2 | 1,647 | 3 | 0 | 1821.5 |
| 2002 Q2 | 0 | 0 | 0 | |
| 2002 Q1 | 528 | 0 | 0 | 0.0 |
| 2001 Q4 | 528 | 0 | 0 | 0.0 |
| 2001 Q3 | 520 | 0 | 0 | 0.0 |
| 2001 Q2 | 520 | 0 | 0 | 0.0 |
| 2001 Q1 | 520 | 0 | 0 | 0.0 |
| 2000 Q4 | 520 | 0 | 0 | 0.0 |
| 2000 Q3 | 504 | 0 | 0 | 0.0 |
| 2000 Q2 | 520 | 0 | 0 | 0.0 |
| 2000 Q1 | 520 | 0 | 0 | 0.0 |
No fatalities recorded at this mine.
Reportable incidents
6 on file1995 · 1 incident
1988 · 1 incident
November 25, 1988
CA · Metal/Non-Metal
laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman
SLIP OR FALL OF PERSON
Mt Gaines Resources Inc · Fall to the walkway or working surface
EMPLOYEE SLIPPED AND FELL WHILE WALKING ON PLASTIC LINER OF PONDS. EMPLOYEE FELL AND BRUISED ARM AND HIP.
1987 · 4 incidents
December 11, 1987
CA · Metal/Non-Metal
laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman
SLIP OR FALL OF PERSON
Mt Gaines Resources Inc · Fall onto or against objects
EMPLOYEE SLIPPE8 AND FELL WHILE WALKING ON PLASTIC LINER OF LEACH PAD EMPLOYEE FELL ON A ROCK BRUISING THE MUSCLES IN HIS BACK.
November 16, 1987
CA · Metal/Non-Metal
laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman
SLIP OR FALL OF PERSON
Mt Gaines Resources Inc · Fall to lower level, (Not Elsewhere Classified)
EMPLOYEE WAS CL9ANING GIZZLEY ON KOLBERG SCREENING PLANT WHEN HE SLIPPED FALLING APPROX. 4 FT INJURYING HIS HAND.
Mt Gaines Resources Inc · Contact with electrical current
INDEPENDENT ELE7TRICAL CONTRACTOR DID NOT FOLLOW ESTABLISHED LOCK-OUT PROCEDURES.THE CONTRACTOR MADE CONTACT WITH A HOT LEAD WHILE WIRING A J-BOX RESULTING IN AN ELECTRICAL SHOCK AND BURNS ON TWO FINGERS OF3THE RIGHT HAND.
Mt Gaines Resources Inc · Absorption of radiations, caustics, toxic and noxious substances
I.NAME REPORTIN1 TO WORK WHEN BITTEN BY SNAKE AT FRONT GATE.TRANSPORTED TO HOSPITAL.GIVEN SALINE I.V. TETANUS SHOT,BLOOD TEST AND 4MG OF DECADRON.BLOOD TEST INDICATED NO POISON IN SYSTEM.RELEA SED RETURNED TO3WORK FOLLOWING DAY.