Imperial Rock Mine has $20K 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
6
Years on record
1998–2015
Latest incident
Jan 2015
Compliance record
MSHA citations since 2000
97
citations
31
significant & substantial
$19,619
proposed penalties
$19,619
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.
Rate withheld: 633 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Imperial Rock Mine has $20K 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.
$20K
proposed penalties
$20K
current assessed
$20K
paid to date
$0
outstanding
97 assessments are final orders; 1 contested dockets.
Of $500 in penalties contested before the Commission, $500 was upheld in final decisions.
As of the most recent assessment on 2024-06-04.
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.
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.
5citations taken to the federal commission · 5% of citations on record
Settled
5 · 100%
100%
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 Vacated and withdrawn citations, and settlements that removed the designation, count against.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 1 decided S&S contests · industry: 79%
0%
Penalty reduction in decided contests
$500 proposed, $500 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 2014-06-03.
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: 2020-06-03, 6 years ago
0%
of limit-tested samples over the exposure limit
14
samples
3
limit-tested
Most sampled contaminants
Respirable dust, <.1mg7
Unlisted Particulate, respirable, <1% Qtz4
Nuisance dust, respirable, <1% Qtz3
Show the individual readings (14)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2020-06-03
Respirable dust, <.1mg
0
Oiler, Greaser
2020-06-03
Nuisance dust, respirable, <1% Qtz
0.21
10
0.02
Bobcat Operator
2020-06-03
Nuisance dust, respirable, <1% Qtz
0.73
10
0.07
Crusher Oper/Worker
2020-06-03
Nuisance dust, respirable, <1% Qtz
0.13
10
0.01
Bulldozer Operator
2014-11-13
Respirable dust, <.1mg
0
Truck Driver
2005-01-13
Unlisted Particulate, respirable, <1% Qtz
0.52
Front-end Loader Operator
2005-01-13
Unlisted Particulate, respirable, <1% Qtz
0.13
Backhoe Operator
2005-01-13
Unlisted Particulate, respirable, <1% Qtz
0.12
Tractor Operator
2005-01-13
Respirable dust, <.1mg
0
Crusher Oper/Worker
2005-01-13
Unlisted Particulate, respirable, <1% Qtz
0.4
Mechanic
2003-08-13
Respirable dust, <.1mg
0
Crusher Oper/Worker
2003-08-13
Respirable dust, <.1mg
0
Front-end Loader Operator
2003-08-13
Respirable dust, <.1mg
0
Utility Man
2003-08-13
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.
Imperial Rock Mine 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
No reportable injury cases in any year shown. Employee-hours were reported in each of those years, so these are true zeros rather than missing data. Citations, listed in the compliance record above, are inspector-found violations and are counted separately from worker injuries.
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 Florida, metal and nonmetal mining averaged 1.33 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
2022 *
0.00
0.00
0.000
2021 *
0.00
0.00
0.000
2020 *
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
14
2025
12
2024
12
2023
9
2022
9
2021
10
2020
12
2019
8
2018
10
2017
9
2016
5
2015
5
2014
4
2013
2
2005
5
2004
9
2003
5
2002
7
2001
9
2000
10
Source: MSHA quarterly employment and production, updated weekly.
Imperial Rock Mine sits in Jackson County, Florida, where the Census mining category is 0.4% 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.
Jackson County, Florida · Population 47,652
0.4%
Mining share of county employment
$47,327
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
5,641
0
0
0.0
2026 Q1
6,874
0
0
0.0
2025 Q4
7,159
0
0
0.0
2025 Q3
8,779
0
0
0.0
2025 Q2
7,168
0
0
0.0
2025 Q1
5,831
0
0
0.0
2024 Q4
5,798
0
0
0.0
2024 Q3
5,726
0
0
0.0
Show 66 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
5,609
1
0
178.3
2024 Q1
4,735
0
0
0.0
2023 Q4
3,625
0
0
0.0
2023 Q3
5,131
0
0
0.0
2023 Q2
3,952
2
0
506.1
2023 Q1
4,754
0
0
0.0
2022 Q4
4,413
0
0
0.0
2022 Q3
5,040
1
0
198.4
2022 Q2
5,591
0
0
0.0
2022 Q1
5,475
0
0
0.0
2021 Q4
5,162
1
0
193.7
2021 Q3
5,266
0
0
0.0
2021 Q2
4,660
0
0
0.0
2021 Q1
5,029
1
0
198.8
2020 Q4
5,152
0
0
0.0
2020 Q3
5,427
0
0
0.0
2020 Q2
6,110
1
0
163.7
2020 Q1
5,583
2
1
358.2
2019 Q4
4,798
0
0
0.0
2019 Q3
4,988
1
0
200.5
2019 Q2
3,414
0
0
0.0
2019 Q1
2,330
1
0
429.2
2018 Q4
2,025
0
0
0.0
2018 Q3
3,834
0
0
0.0
2018 Q2
3,904
1
1
256.1
2018 Q1
4,167
0
0
0.0
2017 Q4
3,506
3
0
855.7
2017 Q3
1,870
0
0
0.0
2017 Q1
2,547
0
0
0.0
2016 Q4
1,585
5
3
3154.6
2016 Q3
1,532
0
0
0.0
2016 Q2
1,787
2
1
1119.2
2016 Q1
2,172
0
0
0.0
2015 Q4
2,274
3
2
1319.3
2015 Q3
2,462
0
0
0.0
2015 Q2
2,119
4
1
1887.7
2015 Q1
2,434
0
0
0.0
2014 Q4
2,409
9
5
3736.0
2014 Q3
1,171
1
0
854.0
2014 Q2
0
0
0
2014 Q1
1,460
5
1
3424.7
2013 Q4
432
0
0
0.0
2005 Q4
312
0
0
0.0
2005 Q3
16
0
0
0.0
2005 Q2
1,313
0
0
0.0
2005 Q1
4,239
4
2
943.6
2004 Q4
4,916
0
0
0.0
2004 Q3
4,268
1
0
234.3
2004 Q2
5,442
0
0
0.0
2004 Q1
4,450
5
2
1123.6
2003 Q4
3,868
0
0
0.0
2003 Q3
2,452
7
0
2854.8
2003 Q2
168
0
0
0.0
2003 Q1
2,009
4
1
1991.0
2002 Q4
3,509
0
0
0.0
2002 Q3
4,098
2
1
488.0
2002 Q2
3,489
0
0
0.0
2002 Q1
2,964
3
0
1012.1
2001 Q4
2,991
0
0
0.0
2001 Q3
3,210
7
2
2180.7
2001 Q2
4,507
0
0
0.0
2001 Q1
4,479
2
0
446.5
2000 Q4
4,783
1
1
209.1
2000 Q3
4,546
11
7
2419.7
2000 Q2
2,593
0
0
0.0
2000 Q1
4,987
6
0
1203.1
No fatalities recorded at this mine.
Reportable incidents
6 on file
2015 · 1 incident
January 29, 2015FL · Metal/Non-Metalcrane operator, mobile equipment operator (meo), dragline operator, dropball operator, riggerSTEPPING OR KNEELING ON OBJECT
He dismounted the dragline and walked to his truck. On the way he stepped on a rock and his foot slipped. The damage was not noticeable for several weeks.
2001 · 1 incident
May 2, 2001FL · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorHANDTOOLS (NONPOWERED)
INJURED WAS AFENDING TO CRANE LIFTING A HAND RAIL. WHEN HE PULL ON THE CHAIN, WHICH SLIPPED UPWARD PINNING HIS LEFT THUMB AGAINST THE HANDRAIL. INJURED PULLED THUMB FREE. IN PAIN INJURED PULLE D GLOVE OFF, FOUND LACERATION AND SWELLING TO LEFT THUMB.
EE STATED HE STRAINED HIS LOWER BACK WHILE DRIVING HAUL TRUCK OVER ROUGH GROUND BUT DID NOT CLAIM INJURY UNTIL THIRTEEN (13) DAYS LATER AFTER USING SHOVEL FOR A WEEK.
July 10, 1998FL · Metal/Non-Metalhaul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driverSLIP OR FALL OF PERSON