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: 942 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Wilson Pit has $13K 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.
$13K
proposed penalties
$13K
current assessed
$13K
paid to date
$0
outstanding
77 assessments are final orders; 1 contested dockets.
Of $254 in penalties contested before the Commission, $227 was upheld in final decisions.
As of the most recent assessment on 2025-01-07.
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.
2citations taken to the federal commission · 2% of citations on record
Settled
2 · 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 Vacated and withdrawn citations, and settlements that removed the designation, count against.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%
11%
Penalty reduction in decided contests
$254 proposed, $227 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 A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record.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 2010-07-08.
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: 2026-07-23
0%
of limit-tested samples over the exposure limit
25
samples
9
limit-tested
Most sampled contaminants
Respirable dust, <.1mg16
Quartz, respirable, >1% Qtz9
Show the individual readings (25)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2026-07-23
Respirable dust, <.1mg
0
Front-end Loader Operator
2026-07-23
Quartz, respirable, >1% Qtz
0.31
0.53
0.58
Crusher Oper/Worker
2026-07-23
Respirable dust, <.1mg
0
Truck Driver
2026-07-23
Respirable dust, <.1mg
0
Laborer, Bullgang
2024-06-05
Quartz, respirable, >1% Qtz
0.43
0.69
0.62
Laborer, Bullgang
2024-06-05
Respirable dust, <.1mg
0
Laborer, Bullgang
2024-06-05
Respirable dust, <.1mg
0
Front-end Loader Operator
2024-06-05
Respirable dust, <.1mg
0
Front-end Loader Operator
2021-05-11
Respirable dust, <.1mg
0
Washer Operator
2021-05-11
Quartz, respirable, >1% Qtz
0.35
0.58
0.60
Utility Man
2021-05-11
Quartz, respirable, >1% Qtz
0.41
0.59
0.69
Crusher Oper/Worker
2021-05-11
Respirable dust, <.1mg
0
Utility Man
2019-08-15
Respirable dust, <.1mg
0
Bulldozer Operator
2019-08-15
Quartz, respirable, >1% Qtz
0.16
0.32
0.50
Supervisor, Co. Official
2019-08-15
Respirable dust, <.1mg
0
Mechanic
2013-04-17
Respirable dust, <.1mg
0
Backhoe Operator
2013-04-17
Respirable dust, <.1mg
0
Truck Driver
2013-04-17
Respirable dust, <.1mg
0
Bulldozer Operator
2010-10-05
Respirable dust, <.1mg
0
Complete Load-Haul-Dump
2010-10-05
Respirable dust, <.1mg
0
Complete Load-Haul-Dump
2010-10-05
Respirable dust, <.1mg
0
Front-end Loader Operator
2008-05-07
Quartz, respirable, >1% Qtz
0.18
0.66
0.27
Dry Screen Plant Operator
2008-05-07
Quartz, respirable, >1% Qtz
0.78
0.85
0.92
Dry Screen Plant Operator
2005-05-18
Quartz, respirable, >1% Qtz
0.13
0.65
0.20
Crusher Oper/Worker
2005-05-18
Quartz, respirable, >1% Qtz
0.47
1.96
0.24
Crusher Oper/Worker
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.
Wilson Pit recorded 12.14 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.
12.14
total case rate
12.14
days-away rate
0.000
fatality rate
Above 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 Michigan, metal and nonmetal mining averaged 2.06 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 *
12.14
12.14
0.000
2024 *
0.00
0.00
0.000
2023 *
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
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
18
2025
17
2024
17
2023
20
2022
19
2021
20
2020
22
2019
23
2018
20
2017
18
2016
17
2015
16
2014
14
2013
13
2012
13
2011
12
2010
10
2009
11
2008
13
2007
15
2006
15
2005
15
2004
14
2003
16
2002
17
2001
17
2000
15
Source: MSHA quarterly employment and production, updated weekly.
Wilson Pit sits in Sanilac County, Michigan, 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.
Sanilac County, Michigan · Population 40,574
0.4%
Mining share of county employment
$59,074
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
Employee was walking on a barge catwalk that was wobbly and washed out at one end. Unsecured floor grating popped up when the employee stepped on it causing them to fall and strike a knee on the next piece of floor grating.
Employee was operating a stand behind skid steer. While backing up EE trapped elbow and hand between a structural crossbeam and the control support bar causing EE's wrist to bend backwards.
Slurry pump B feeding the wash plant, plugged. After shutting down, the technician opened the pump drain on bottom of the pump housing. Due to the head pressure, water sprayed out of the drain. Since the pump was plugged, the water was extremely hot, burning the technicians arm. The technician was treated for second degree burns on left forearm at the hospital.
Miner entered the mine area in a John Deere Gator and thought the loader operator saw EE enter. Miner got out of the Gator to talk to the operator. EE parked in what EE thought was a safe area but as the loader backed up and turned it struck the Gator.
A rock flung from a conveyor and struck the plant supervisor in the back, no serious injuries were sustained. Medical attention was sought, some bruising. On July 31st, 2013 the employee advised that on his way home from work the day before he experienced some pain. He sought medical opinions and has been instructed to rest at home for two weeks.
2008 · 1 incident
November 24, 2008MI · Metal/Non-Metaloutside foreman, leadmanMACHINERY
While winterizing conveyor system, EE was standing on top of 3100 lb counterweight while a co-worker raised it using a 20 ton crane. The cable from the crane severed causing the weight & EE to fall approx 10'. The weight came to abrupt stop causing EE to fall flat onto the weight & the 150 lb ball that was previously attached to the crane cable fell on his legs.
2005 · 1 incident
April 8, 2005MI · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorSLIP OR FALL OF PERSON
Going down steps of loader, frost on last step caused ee to slip and his knee hit a piece of metal. Pre-shift start up.
2004 · 2 incidents
June 7, 2004MI · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorSLIP OR FALL OF PERSON
I NAME WAS HELP3NG ANOTHER EMPLOYEE TO LIFT TRANSMISSION UNKNOWN TO ANYONE HE HAD STRAINED HIMSELF IN THE GROIN. DIAGNOSES DESCRIPTIONS INGUINAL SPRAIN.