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: 827 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Corkscrew has $24K in proposed MSHA penalties and $203 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.
$24K
proposed penalties
$24K
current assessed
$24K
paid to date
$203
outstanding
125 assessments are final orders; 1 contested dockets.
Of $816 in penalties contested before the Commission, $816 was upheld in final decisions.
As of the most recent assessment on 2023-11-08.
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.
4citations taken to the federal commission · 3% of citations on record
Stood as issued
4 · 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 Vacated and withdrawn citations, and settlements that removed the designation, count against.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 2 decided S&S contests · industry: 79%
0%
Penalty reduction in decided contests
$816 proposed, $816 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 A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record.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 2010-03-11.
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: 2023-11-08
0%
of limit-tested samples over the exposure limit
25
samples
8
limit-tested
Most sampled contaminants
Respirable dust, <.1mg16
Nuisance dust, respirable, <1% Qtz4
Nuisance dust, total, <1% Qtz4
Quartz, respirable, >1% Qtz1
Show the individual readings (25)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2023-11-08
Respirable dust, <.1mg
0
Utility Man
2023-11-08
Respirable dust, <.1mg
0
Utility Man
2023-11-08
Respirable dust, <.1mg
0
Truck Driver
2023-11-08
Respirable dust, <.1mg
0
Utility Man
2022-09-13
Nuisance dust, total, <1% Qtz
0.17
10
0.02
Dry Screen Plant Operator
2022-09-13
Nuisance dust, total, <1% Qtz
1.83
10
0.18
Utility Man
2022-09-13
Nuisance dust, total, <1% Qtz
0.88
10
0.09
Utility Man
2022-09-13
Nuisance dust, total, <1% Qtz
0.28
10
0.03
Truck Driver
2020-11-19
Quartz, respirable, >1% Qtz
0.17
Cleanup Man
2020-11-19
Respirable dust, <.1mg
0
Crusher Oper/Worker
2020-11-19
Nuisance dust, respirable, <1% Qtz
0.22
10
0.02
Belt Cleaner
2018-10-11
Respirable dust, <.1mg
0
Washer Operator
2018-10-11
Respirable dust, <.1mg
0
Laborer, Bullgang
2017-08-29
Respirable dust, <.1mg
0
Sampler, Dust
2017-08-29
Respirable dust, <.1mg
0
Washer Operator
2017-08-29
Respirable dust, <.1mg
0
Front-end Loader Operator
2009-01-21
Respirable dust, <.1mg
0
Backhoe Operator
2009-01-21
Nuisance dust, respirable, <1% Qtz
0.15
10
0.02
Truck Driver
2009-01-21
Nuisance dust, respirable, <1% Qtz
0.42
10
0.04
Front-end Loader Operator
2004-05-05
Nuisance dust, respirable, <1% Qtz
0.18
10
0.02
Front-end Loader Operator
2004-05-05
Respirable dust, <.1mg
0
Dragline Operator
2004-05-05
Respirable dust, <.1mg
0
Backhoe Operator
2002-04-24
Respirable dust, <.1mg
0
Backhoe Operator
2002-04-24
Respirable dust, <.1mg
0
Dragline Operator
2002-04-24
Respirable dust, <.1mg
0
Utility 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.
Corkscrew 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 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
2023 *
0.00
0.00
0.000
2022 *
0.00
0.00
0.000
2021 *
5.19
0.00
0.000
2020 *
0.00
0.00
0.000
2019 *
0.00
0.00
0.000
2008 *
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
20
2025
21
2024
16
2023
11
2022
14
2021
16
2020
14
2019
20
2018
24
2017
14
2010
5
2009
10
2008
9
2007
11
2006
15
2005
8
2004
1
2003
3
2002
2
Source: MSHA quarterly employment and production, updated weekly.
Corkscrew sits in Lee County, Florida, 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.
Lee County, Florida · Population 792,692
0.1%
Mining share of county employment
$73,099
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
EE was using a lever chain hoist to remove a large shaft. The welded eye failed and the broken piece struck the EE in the hand resulting in a laceration that required stitches.
2021 · 1 incident
October 20, 2021FL · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorHANDLING OF MATERIALS
Operator had climbed into the seat of the loader and went to shut the door. As EE pulled hard on the handle, EE experienced a sharp pain from the left elbow to the hand. Operator was swapping loaders with another employee.
2018 · 1 incident
May 11, 2018FL · Metal/Non-Metalquality control technician, laboratory technician, laboratory assistantHANDLING OF MATERIALS
Titan Florida, LLC. · Caught in, under or between a moving and a stationary object
Drive belts on the secondary crusher twisted. In an effort to straighten out the belts, employee caught right pinky finger between drive belts and sheave.
2006 · 2 incidents
August 22, 2006FL · Metal/Non-Metalcrane operator, mobile equipment operator (meo), dragline operator, dropball operator, riggerOTHER
THE HOIST CABLE BROKE ON THE DRAGLINE AND CAME DOWN THE BOOM. THE END OF THE CABLE FLIPPED INTO THE FRONT WINDOW OPENING WHERE HE WAS STANDING THE CABLE HIT HIM ON THE RIGHT ARM RESULTING IN A COMPOUND FRACTURE.