Rocky Canyon Plant has $41K in proposed MSHA penalties and $0 outstanding across 1 contested dockets, plus health sampling and the full incident record.
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Fatalities
0
Total incidents
14
Years on record
1986–2026
Latest incident
Jul 2026
Compliance record
MSHA citations since 2001
136
citations
29
significant & substantial
$41,389
proposed penalties
$41,389
paid to date
100% of proposed penalties paid to date, a $0 gap.
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.
136 citations across 1,391 inspection hours.
Source: MSHA inspections data, updated weekly.
Rocky Canyon Plant has $41K in proposed MSHA penalties and $0 outstanding across 1 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.
$41K
proposed penalties
$41K
current assessed
$41K
paid to date
$0
outstanding
136 assessments are final orders; 1 contested dockets.
Of $100 in penalties contested before the Commission, $0 was upheld in final decisions.
As of the most recent assessment on 2026-04-22.
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.
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.
1citations taken to the federal commission · 1% of citations on record
Vacated or withdrawn
1 · 100%
100%
Penalty reduction in decided contests
$100 proposed, $0 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 A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record.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 2011-08-02.
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.
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: 2026-04-23
8%
of limit-tested samples over the exposure limit
25
samples
12
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz121 over
Respirable dust, <.1mg13
Show the individual readings (25)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2019-07-31
Quartz, respirable, >1% Qtz
0.95
0.73
1.30
Cleanup Man
2026-04-23
Respirable dust, <.1mg
0
Front-end Loader Operator
2023-04-20
Quartz, respirable, >1% Qtz
0.21
0.44
0.48
Laborer, Bullgang
2021-05-11
Respirable dust, <.1mg
0
Bulldozer Operator
2019-10-23
Quartz, respirable, >1% Qtz
0.38
0.73
0.52
Laborer, Bullgang
2015-10-28
Respirable dust, <.1mg
0
Dry Screen Plant Operator
2015-10-28
Respirable dust, <.1mg
0
Cleanup Man
2015-10-28
Respirable dust, <.1mg
0
Dry Screen Plant Operator
2015-10-28
Respirable dust, <.1mg
0
Bulldozer Operator
2014-01-09
Respirable dust, <.1mg
0
Dry Screen Plant Operator
2014-01-09
Quartz, respirable, >1% Qtz
0.12
0.73
0.16
Cleanup Man
2009-04-09
Respirable dust, <.1mg
0
Dry Screen Plant Operator
2009-04-09
Respirable dust, <.1mg
0
Laborer, Bullgang
2009-04-09
Respirable dust, <.1mg
0
Bulldozer Operator
2005-05-03
Quartz, respirable, >1% Qtz
0.25
0.74
0.34
Crusher Oper/Worker
2005-05-03
Respirable dust, <.1mg
0
Front-end Loader Operator
2005-05-03
Quartz, respirable, >1% Qtz
0.24
0.75
0.32
Truck Driver
2005-05-03
Quartz, respirable, >1% Qtz
1.12
1.68
0.67
Front-end Loader Operator
2005-04-27
Respirable dust, <.1mg
0
Front-end Loader Operator
2005-04-27
Quartz, respirable, >1% Qtz
0.16
0.8
0.20
Bulldozer Operator
2005-04-27
Quartz, respirable, >1% Qtz
0.19
0.72
0.26
Front-end Loader Operator
2004-01-27
Quartz, respirable, >1% Qtz
0.14
0.43
0.33
Belt Crew
2003-06-10
Quartz, respirable, >1% Qtz
0.31
1.09
0.28
Laborer, Bullgang
2003-06-10
Respirable dust, <.1mg
0
Dry Screen Plant Operator
2003-06-10
Quartz, respirable, >1% Qtz
0.15
0.82
0.18
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.
Rocky Canyon Plant recorded 0.00 reportable injury cases per 100 full-time workers in 2025.
Injury rate, 2025
ⓘ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 1.65 and the all-US-mining average was 1.97 cases per 100 workers.
In California, metal and nonmetal mining averaged 1.42 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
2025 *
0.00
0.00
0.000
2024 *
0.00
0.00
0.000
2023 *
8.55
8.55
0.000
2022 *
0.00
0.00
0.000
2021 *
0.00
0.00
0.000
2020 *
8.85
0.00
0.000
2019 *
0.00
0.00
0.000
2018 *
0.00
0.00
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.
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year
Employees
2026
13
2025
12
2024
13
2023
11
2022
16
2021
18
2020
16
2019
19
2018
22
2017
21
2016
19
2015
17
2014
16
2013
14
2012
12
2011
14
2010
15
2009
15
2008
13
2007
20
2006
22
2005
20
2004
17
2003
13
2002
13
2001
16
2000
13
Source: MSHA quarterly employment and production, updated weekly.
Rocky Canyon Plant sits in San Luis Obispo County, California, where the Census mining category is 0.2% 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.
San Luis Obispo County, California · Population 281,486
0.2%
Mining share of county employment
$93,398
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
5,662
1
0
176.6
2026 Q1
5,153
0
0
0.0
2025 Q4
5,219
0
0
0.0
2025 Q3
6,480
0
0
0.0
2025 Q2
7,094
0
0
0.0
2025 Q1
6,420
1
0
155.8
2024 Q4
7,757
0
0
0.0
2024 Q3
6,378
4
0
627.2
Show 98 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
7,297
0
0
0.0
2024 Q1
7,398
4
2
540.7
2023 Q4
7,670
0
0
0.0
2023 Q3
7,737
0
0
0.0
2023 Q2
4,799
2
1
416.8
2023 Q1
3,175
0
0
0.0
2022 Q4
6,400
3
1
468.8
2022 Q3
7,443
0
0
0.0
2022 Q2
6,301
4
2
634.8
2022 Q1
6,830
0
0
0.0
2021 Q4
6,853
3
0
437.8
2021 Q3
7,143
0
0
0.0
2021 Q2
6,584
1
1
151.9
2021 Q1
5,570
3
0
538.6
2020 Q4
5,563
0
0
0.0
2020 Q3
5,102
0
0
0.0
2020 Q2
5,780
1
1
173.0
2020 Q1
6,144
3
2
488.3
2019 Q4
6,354
4
1
629.5
2019 Q3
7,350
1
1
136.1
2019 Q2
7,184
0
0
0.0
2019 Q1
6,135
1
1
163.0
2018 Q4
6,716
0
0
0.0
2018 Q3
8,196
0
0
0.0
2018 Q2
8,327
0
0
0.0
2018 Q1
7,759
1
0
128.9
2017 Q4
8,954
0
0
0.0
2017 Q3
8,323
1
0
120.1
2017 Q2
8,165
0
0
0.0
2017 Q1
6,909
0
0
0.0
2016 Q4
6,621
0
0
0.0
2016 Q3
6,864
0
0
0.0
2016 Q2
6,973
2
1
286.8
2016 Q1
7,062
0
0
0.0
2015 Q4
7,507
2
1
266.4
2015 Q3
7,467
1
0
133.9
2015 Q2
6,306
0
0
0.0
2015 Q1
6,276
0
0
0.0
2014 Q4
5,678
1
0
176.1
2014 Q3
6,686
0
0
0.0
2014 Q2
6,780
3
0
442.5
2014 Q1
6,738
3
1
445.2
2013 Q4
6,487
0
0
0.0
2013 Q3
6,985
0
0
0.0
2013 Q2
6,459
0
0
0.0
2013 Q1
4,970
0
0
0.0
2012 Q4
5,021
1
0
199.2
2012 Q3
5,086
0
0
0.0
2012 Q2
4,542
1
0
220.2
2012 Q1
5,361
0
0
0.0
2011 Q4
5,278
2
2
378.9
2011 Q3
8,389
0
0
0.0
2011 Q2
7,833
1
1
127.7
2011 Q1
6,245
3
1
480.4
2010 Q4
5,330
0
0
0.0
2010 Q3
6,545
0
0
0.0
2010 Q2
6,598
4
1
606.2
2010 Q1
6,360
0
0
0.0
2009 Q4
6,715
3
0
446.8
2009 Q3
8,464
5
1
590.7
2009 Q2
7,751
4
1
516.1
2009 Q1
5,862
0
0
0.0
2008 Q4
5,635
9
1
1597.2
2008 Q3
6,964
0
0
0.0
2008 Q2
5,828
7
0
1201.1
2008 Q1
5,177
0
0
0.0
2007 Q4
5,295
2
0
377.7
2007 Q3
5,582
0
0
0.0
2007 Q2
6,931
1
0
144.3
2007 Q1
6,777
0
0
0.0
2006 Q4
7,776
0
0
0.0
2006 Q3
7,719
3
1
388.7
2006 Q2
7,370
0
0
0.0
2006 Q1
7,207
5
0
693.8
2005 Q4
7,892
0
0
0.0
2005 Q3
8,232
0
0
0.0
2005 Q2
7,889
2
0
253.5
2005 Q1
4,848
0
0
0.0
2004 Q4
6,482
1
0
154.3
2004 Q3
5,769
0
0
0.0
2004 Q2
5,767
1
0
173.4
2004 Q1
5,766
14
1
2428.0
2003 Q4
5,201
0
0
0.0
2003 Q3
5,107
0
0
0.0
2003 Q2
5,723
0
0
0.0
2003 Q1
5,511
3
0
544.4
2002 Q4
5,702
0
0
0.0
2002 Q3
5,664
4
0
706.2
2002 Q2
6,297
3
1
476.4
2002 Q1
6,498
0
0
0.0
2001 Q4
5,601
0
0
0.0
2001 Q3
7,864
6
2
763.0
2001 Q2
8,094
0
0
0.0
2001 Q1
7,739
0
0
0.0
2000 Q4
6,480
0
0
0.0
2000 Q3
7,133
0
0
0.0
2000 Q2
7,250
0
0
0.0
2000 Q1
5,398
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
14 on file
2026 · 3 incidents
July 8, 2026CA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
Employee was shoveling material from under the conveyor belt and felt slight pain in lower back (failed to report), operating haul truck and went home. It was not until 6-3-2026 (following day) when employee had a hard time getting out of bed for work when it was reported. Resulted in acute lumbar myofascial strain
January 16, 2026CA · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanHANDTOOLS (NONPOWERED)
Employee's right hand was in the line of fire of a block and chain. The block and chain was under tension and shifted which struck employee's index finger. This resulted in a broken finger.
2023 · 1 incident
February 8, 2023CA · Metal/Non-Metaldry screening plant operator, screen house operatorHANDLING OF MATERIALS
Operator was changing screens on the shaker deck in the morning and felt their back becoming inflamed from their body positioning. Employee was working through the pain operating the haul truck the remainder of the day when they noticed that the pain had become much worse. Was seen at clinic with a lower right back strain and right lumbar radiculopathy.
2020 · 1 incident
February 21, 2020CA · Metal/Non-Metalminer, prospector, necMACHINERY
Employee was performing grinding and welding on shaker on the lower plant repairing holes. Thought had dust in eyes. Later that evening approx. 1030pm the right eye became inflamed and EE went to ER and they found a slab of metal imbedded.
2011 · 1 incident
November 14, 2011CA · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorMACHINERY
Employee was disassembling a 30 HP water pump for inspection when he took off his gloves to remove the bolts, he then turned the impeller without gloves and lacerated his right index finger. The finger required 9 stitches.
APPROXIMATELY 6 MONTHS AFTER OPERATING NEW 1996 988-F CATERPILLER LOADER WITH NEW ERGONICALLY CORRECT CONTROLS, THE EMPLOYEE STARTED COMPLAINING OF PAIN IN LEFT HAND.
1994 · 1 incident
September 30, 1994CA · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerHANDLING OF MATERIALS
3 EMPLOYEES WERE CHANGING 2" SCREENS LIFTING SCREENS ABOVE THEIR HEADS TO SLIDE INTO SCREEN DECK.SCREEN DECK WENT TO HOSPITAL LATER FOR X-RAYS SHOWED SHOULDER STRAIN ON LEFT SIDE.
WHILE A TOP A LADDER CLEANING WINDOWS OF A SCALE HOUSE IN DISBATCHE FRACTURED HIS ANKLE WHEN THE LADDER SLIPPED OUT BENEATH HIM RESULTING IN A FALL OF APPROXIMATELY TEN FEET.
1988 · 1 incident
June 22, 1988CA · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerHANDTOOLS (NONPOWERED)
EMPL WAS ASSISTING PLANT OPERATOR WITH PLUGGED JAW CRUSHER. RIGHT HAND MIDDLE TWO FINGERS WERE CUT WHEN CHAIN WAS PULLED FROM HAND. TOOK TO HOSPITAL & HAD FINGER STITCHED.
HE WAS WALKING 2N THE LOWER CATWALK UNDER THE HEWITT ROBBINS SCREEN DECK, CHECKING THE 1 1/2 BELT CONVEYOR, WHEN A ROCK FELL FROM THE MAIN FEED CONVEYOR STRIKING HIM ON THE BACK.