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Morris Ravine Mine: 285 MSHA citations Metal/Non-Metal

Controlled by MRLLC Investors LTD
oroville, Butte County, CA  ·  Active
MSHA Mine ID: 0405407

Morris Ravine Mine has $132K in proposed MSHA penalties and $19K outstanding across 5 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
7
Years on record
2001–2014
Latest incident
May 2014
Compliance record
MSHA citations since 2001
285
citations
58
significant & substantial
$132,491
proposed penalties
$99,221
paid to date
75% of proposed penalties paid to date, a $33,270 gap.
Source: MSHA violations data, updated weekly.
See Mineral Resources LLC's full MSHA compliance history →
Inspection activity
MSHA inspections since 2001
105
inspections on record
1,536
inspection hours
18.6
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.
285 citations across 1,536 inspection hours.
Source: MSHA inspections data, updated weekly.
Imminent-danger orders
ⓘ A Section 107(a) order removes miners from an area when an inspector finds an imminent danger. Each order is lifted once the condition is corrected, so this counts orders issued, not orders now in effect.
1
Section 107(a) orders
Most recent order: 2015-05-18.
On record since 2015.
Source: MSHA imminent-danger order records, updated weekly.

Morris Ravine Mine has $132K in proposed MSHA penalties and $19K outstanding across 5 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.
$132K
proposed penalties
$118K
current assessed
$99K
paid to date
$19K
outstanding
283 assessments are final orders; 5 contested dockets.
Of $39K in penalties contested before the Commission, $24K was upheld in final decisions.
As of the most recent assessment on 2026-04-23.
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.
20.5%
significant & substantial
5.3%
high negligence or reckless
20.5%
reasonably likely or greater
46.3%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 10.2% low, 84.5% moderate, 5.3% high, 0.0% reckless.
Source: MSHA violations gravity and negligence coding, updated weekly.
When citations were contested
ⓘ Contesting a citation before the Federal Mine Safety and Health Review Commission is a lawful right. These figures state the public outcomes of that process, from MSHA's Contested Violations file.
44 citations taken to the federal commission · 15% of citations on record
  • Settled 43 · 98%
  • Vacated or withdrawn 1 · 2%
32%
S&S designation survived the contest
ⓘ Counts a Significant & Substantial citation as surviving when a settlement or judge's decision kept the designation, or the contest was dismissed or defaulted so the citation stands as issued. Vacated and withdrawn citations, and settlements that removed the designation, count against.
of 19 decided S&S contests · industry: 79%
39%
Penalty reduction in decided contests
$39K proposed, $24K after decisions · industry: 39%
Source: MSHA Contested Violations file (public record), updated weekly. A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record. Latest contest filed 2022-09-18.
Contested penalties
ⓘ A reduction or dismissal at the Commission is a lawful outcome of contesting a proposed penalty. Figures are the proposed amount and the amount upheld in the docket's decision.
Largest penalties this mine contested before the Federal Mine Safety and Health Review Commission, with the outcome on record.
Docket Decision Judge Year Proposed / upheld
WEST 2014-343M Settlement Manning 2015 $18K → $13K
WEST 2022-0359 Settlement Simonton 2023 $12K → $3K
WEST 2022-0357 Settlement Simonton 2023 $3K → $3K
WEST 2022-0358 Settlement Simonton 2023 $3K → $3K
WEST 2014-0884 Settlement Manning 2015 $2K → $2K
Source: FMSHRC civil penalty dockets and decisions (public record), 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: 2025-09-04
0%
of limit-tested samples over the exposure limit
16
samples
1
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg15
  • Quartz, respirable, >1% Qtz1
Show the individual readings (16)
Date Contaminant Concentration Limit Conc / limit Occupation
2025-09-04 Respirable dust, <.1mg 0 Laborer, Bullgang
2023-10-12 Respirable dust, <.1mg 0 Front-end Loader Operator
2023-05-16 Respirable dust, <.1mg 0 Laborer, Bullgang
2023-01-25 Respirable dust, <.1mg 0 Front-end Loader Operator
2018-06-19 Quartz, respirable, >1% Qtz 0.34 1.08 0.31 Laborer, Bullgang
2016-04-27 Respirable dust, <.1mg 0 Laborer, Bullgang
2016-04-27 Respirable dust, <.1mg 0 Front-end Loader Operator
2013-06-27 Respirable dust, <.1mg 0 Front-end Loader Operator
2013-06-27 Respirable dust, <.1mg 0 Crusher Oper/Worker
2010-05-18 Respirable dust, <.1mg 0 Front-end Loader Operator
2010-05-18 Respirable dust, <.1mg 0 Hydrating Plant Operator
2003-05-22 Respirable dust, <.1mg 0 Backhoe Operator
2003-05-22 Respirable dust, <.1mg 0 Front-end Loader Operator
2003-05-22 Respirable dust, <.1mg 0 Dry Screen Plant Operator
2003-05-22 Respirable dust, <.1mg 0 Dry Screen Plant Operator
2003-05-22 Respirable dust, <.1mg 0 Front-end Loader Operator
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.

Morris Ravine Mine recorded 0.00 reportable injury cases per 100 full-time workers in 2018.

Injury rate, 2018
ⓘ This rate is reportable injury cases per 100 full-time-equivalent workers per year, computed as 200,000 times cases divided by MSHA operator-reported employee-hours. Cases are injuries MSHA graded degree 01 through 07; accident-only events that hurt no one are excluded, and so are contractor injuries, whose hours do not attach to a single mine. Rates begin in 2000, when quarterly employment reporting starts, and are withheld below 20,000 hours in a year.
0.00
total case rate
0.00
days-away rate
0.000
fatality rate
Below average. The US metal and nonmetal mining average was 1.95 and the all-US-mining average was 2.33 cases per 100 workers.
In California, metal and nonmetal mining averaged 1.92 cases per 100 workers that year.
Under 100,000 employee-hours were reported that year, so a single case moves the rate by two or more. Read the figure as approximate.
Year total case rate days-away fatal
2018 * 0.00 0.00 0.000
2017 * 0.00 0.00 0.000
2016 * 0.00 0.00 0.000
2015 * 0.00 0.00 0.000
2014 * 4.98 0.00 0.000
2013 * 0.00 0.00 0.000
2010 * 0.00 0.00 0.000
2008 * 7.88 7.88 0.000
* Fewer than 100,000 employee-hours that year; the rate is less stable.
Source: injury cases from MSHA accident and injury records; employee-hours from MSHA quarterly employment reports. Rate is cases per 100 full-time-equivalent workers, operator employees only.
Ownership history
  1. Mineral Resources LLC 2000 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 9
2025 7
2024 6
2023 7
2022 7
2021 8
2020 6
2019 6
2018 18
2017 12
2016 8
2015 11
2014 13
2013 8
2012 7
2011 9
2010 11
2009 10
2008 12
2007 10
2006 11
2005 9
2004 8
2003 8
2002 2
2001 0
2000 3
Source: MSHA quarterly employment and production, updated weekly.

Morris Ravine Mine sits in Butte County, California, where the Census mining category is 0.1% 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.
Butte County, California · Population 209,470
0.1%
Mining share of county employment
$68,574
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 6,663 14 4 2101.2
2026 Q1 3,045 0 0 0.0
2025 Q4 3,013 3 0 995.7
2025 Q3 4,554 0 0 0.0
2025 Q2 4,603 3 0 651.7
2025 Q1 1,877 3 0 1598.3
2024 Q4 2,766 0 0 0.0
2024 Q3 3,404 0 0 0.0
Show 96 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 3,051 1 0 327.8
2024 Q1 2,471 0 0 0.0
2023 Q4 3,009 10 0 3323.4
2023 Q3 2,859 0 0 0.0
2023 Q2 3,469 11 1 3170.9
2023 Q1 2,293 7 1 3052.8
2022 Q4 3,332 0 0 0.0
2022 Q3 3,770 3 3 795.8
2022 Q2 2,781 0 0 0.0
2022 Q1 3,571 0 0 0.0
2021 Q4 4,044 4 0 989.1
2021 Q3 5,400 0 0 0.0
2021 Q2 4,470 3 0 671.1
2021 Q1 3,116 2 1 641.8
2020 Q4 3,158 0 0 0.0
2020 Q3 1,592 1 0 628.1
2020 Q2 2,087 0 0 0.0
2020 Q1 1,745 1 0 573.1
2019 Q4 1,853 0 0 0.0
2019 Q3 1,038 0 0 0.0
2019 Q2 2,978 0 0 0.0
2019 Q1 6,315 0 0 0.0
2018 Q4 13,535 9 5 664.9
2018 Q3 14,426 0 0 0.0
2018 Q2 10,013 6 1 599.2
2018 Q1 7,655 8 2 1045.1
2017 Q4 8,474 0 0 0.0
2017 Q3 8,666 0 0 0.0
2017 Q2 7,964 5 1 627.8
2017 Q1 7,410 0 0 0.0
2016 Q4 5,615 10 1 1780.9
2016 Q3 6,602 0 0 0.0
2016 Q2 5,788 18 4 3109.9
2016 Q1 5,686 8 1 1407.0
2015 Q4 7,354 0 0 0.0
2015 Q3 7,672 0 0 0.0
2015 Q2 9,495 8 2 842.5
2015 Q1 9,384 13 3 1385.3
2014 Q4 9,824 0 0 0.0
2014 Q3 8,647 7 1 809.5
2014 Q2 11,510 13 1 1129.5
2014 Q1 10,177 0 0 0.0
2013 Q4 9,348 18 1 1925.5
2013 Q3 5,780 0 0 0.0
2013 Q2 5,846 5 2 855.3
2013 Q1 3,505 0 0 0.0
2012 Q4 3,330 8 3 2402.4
2012 Q3 4,420 0 0 0.0
2012 Q2 5,700 7 2 1228.1
2012 Q1 4,374 4 1 914.5
2011 Q4 5,610 0 0 0.0
2011 Q3 5,756 9 6 1563.6
2011 Q2 3,655 0 0 0.0
2011 Q1 4,315 4 1 927.0
2010 Q4 6,048 0 0 0.0
2010 Q3 5,843 0 0 0.0
2010 Q2 4,736 3 0 633.4
2010 Q1 5,170 2 0 386.8
2009 Q4 4,262 0 0 0.0
2009 Q3 5,161 0 0 0.0
2009 Q2 3,963 0 0 0.0
2009 Q1 5,679 4 3 704.3
2008 Q4 6,017 1 0 166.2
2008 Q3 7,220 0 0 0.0
2008 Q2 5,845 2 0 342.2
2008 Q1 6,299 1 0 158.8
2007 Q4 5,551 0 0 0.0
2007 Q3 5,729 1 0 174.6
2007 Q2 5,116 0 0 0.0
2007 Q1 4,971 0 0 0.0
2006 Q4 4,647 2 1 430.4
2006 Q3 6,023 0 0 0.0
2006 Q2 2,495 0 0 0.0
2006 Q1 7,566 1 1 132.2
2005 Q4 6,013 0 0 0.0
2005 Q3 4,082 0 0 0.0
2005 Q2 3,935 0 0 0.0
2005 Q1 3,196 0 0 0.0
2004 Q4 3,590 0 0 0.0
2004 Q3 3,592 0 0 0.0
2004 Q2 3,576 0 0 0.0
2004 Q1 3,880 0 0 0.0
2003 Q4 4,384 2 0 456.2
2003 Q3 4,704 0 0 0.0
2003 Q2 4,531 2 1 441.4
2003 Q1 3,702 0 0 0.0
2002 Q4 2,276 2 0 878.7
2002 Q3 0 0 0
2002 Q2 0 4 0
2002 Q1 0 4 0
2001 Q4 0 0 0
2001 Q3 0 5 1
2001 Q2 0 0 0
2000 Q4 0 0 0
2000 Q3 0 0 0
2000 Q2 3,705 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

7 on file

2014 · 1 incident

May 4, 2014 CA · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Mineral Resources LLC · Over-exertion in pulling or pushing objects

At 7:00 AM employee injured his shoulder while turning a valve on the plant clarifier.

2011 · 1 incident

March 18, 2011 CA · Metal/Non-Metal ledgeman/hand, quarry man SLIP OR FALL OF PERSON
Mineral Resources LLC · Fall from machine

Employee was climbing over a conveyor belt and slipped and jumped down aprox 4' to concrete slab, resulting in a fracture to the heel.

2009 · 1 incident

August 23, 2009 CA · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator OTHER
Mineral Resources LLC · (Not Elsewhere Classified)

Unknown back strain.

2008 · 1 incident

May 24, 2008 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON
Mineral Resources LLC · Fall from machine

While working on the screen in the plant, he slipped and landed on his back side.

2003 · 1 incident

August 25, 2003 CA · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDLING OF MATERIALS
Mineral Resources LLC · Over-exertion in lifting objects

WHILE SHOVELING SAND TWISTED TO THE SIDE AND STRAINED BACK (LUMBAR STRAIN)

2002 · 1 incident

2001 · 1 incident

October 16, 2001 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON
Mineral Resources LLC · Fall onto or against objects

WORKER WAS REMOVING FORMS AND STUMBLED OVER A ROCK. CAUGHT FALL WITH LEFT HAND, SPRAINING WRIST.