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: 464 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Sergeants Plant has $7K in proposed MSHA penalties and $0 outstanding across 0 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.
$7K
proposed penalties
$7K
current assessed
$7K
paid to date
$0
outstanding
42 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-06-15.
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.
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: 2026-06-03
33%
of limit-tested samples over the exposure limit
13
samples
6
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz62 over
Respirable dust, <.1mg6
Nuisance dust, respirable, <1% Qtz1
Show the individual readings (13)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2026-06-03
Quartz, respirable, >1% Qtz
0.81
0.51
1.59
Utility Man
2015-05-27
Quartz, respirable, >1% Qtz
0.31
0.26
1.19
Crusher Oper/Worker
2026-06-03
Respirable dust, <.1mg
0
Front-end Loader Operator
2026-06-03
Quartz, respirable, >1% Qtz
0.3
0.53
0.57
Crusher Oper/Worker
2024-11-26
Quartz, respirable, >1% Qtz
0.18
0.77
0.23
Rotary Bucket Ex. Operator
2024-11-26
Respirable dust, <.1mg
0
Truck Driver
2024-11-26
Respirable dust, <.1mg
0
Front-end Loader Operator
2019-11-06
Quartz, respirable, >1% Qtz
0.33
0.43
0.77
Crusher Oper/Worker
2019-11-06
Nuisance dust, respirable, <1% Qtz
0.15
10
0.02
Truck Driver
2019-11-06
Respirable dust, <.1mg
0
Front-end Loader Operator
2019-11-06
Quartz, respirable, >1% Qtz
0.15
Backhoe Operator
2019-11-06
Respirable dust, <.1mg
0
Backhoe Operator
2015-05-27
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.
Sergeants 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 Ohio, metal and nonmetal mining averaged 1.56 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 *
8.72
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
* 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
9
2025
10
2024
10
2023
13
2022
16
2021
12
2020
10
2019
10
2018
8
2017
9
2016
8
2015
7
2014
7
Source: MSHA quarterly employment and production, updated weekly.
Sergeants Plant sits in Perry County, Ohio, where the Census mining category is 0.5% 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.
Perry County, Ohio · Population 35,474
0.5%
Mining share of county employment
$64,737
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
5,768
5
2
866.9
2026 Q1
5,146
0
0
0.0
2025 Q4
4,786
1
0
208.9
2025 Q3
6,182
0
0
0.0
2025 Q2
6,889
1
0
145.2
2025 Q1
6,388
0
0
0.0
2024 Q4
5,360
0
0
0.0
2024 Q3
6,035
4
1
662.8
Show 40 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
6,113
0
0
0.0
2024 Q1
5,432
4
1
736.4
2023 Q4
5,554
0
0
0.0
2023 Q3
6,403
3
0
468.5
2023 Q2
5,363
0
0
0.0
2023 Q1
7,628
0
0
0.0
2022 Q4
7,699
0
0
0.0
2022 Q3
8,756
1
0
114.2
2022 Q2
8,228
0
0
0.0
2022 Q1
7,987
0
0
0.0
2021 Q4
7,938
1
0
126.0
2021 Q3
7,250
0
0
0.0
2021 Q2
5,144
0
0
0.0
2021 Q1
5,326
1
0
187.8
2020 Q4
5,154
0
0
0.0
2020 Q3
2,007
0
0
0.0
2020 Q2
4,641
2
1
430.9
2020 Q1
5,636
0
0
0.0
2019 Q4
4,531
4
1
882.8
2019 Q3
5,472
0
0
0.0
2019 Q2
4,207
0
0
0.0
2019 Q1
4,452
0
0
0.0
2018 Q4
3,765
0
0
0.0
2018 Q3
4,223
0
0
0.0
2018 Q2
3,648
2
2
548.2
2018 Q1
4,149
2
1
482.0
2017 Q4
3,813
0
0
0.0
2017 Q3
4,144
2
0
482.6
2017 Q2
3,020
0
0
0.0
2017 Q1
3,928
0
0
0.0
2016 Q4
3,287
2
0
608.5
2016 Q3
3,595
1
0
278.2
2016 Q2
3,733
0
0
0.0
2016 Q1
2,744
0
0
0.0
2015 Q4
3,128
0
0
0.0
2015 Q3
2,591
0
0
0.0
2015 Q2
4,480
7
2
1562.5
2015 Q1
3,214
0
0
0.0
2014 Q4
4,544
0
0
0.0
2014 Q3
1,022
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
3 on file
2026 · 1 incident
June 26, 2026OH · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorSLIP OR FALL OF PERSON
Conveyor went down due to being overloaded and they commenced to clearing the belt off to get back running when employee was repositioning feet they caused them to fall down on the rock surface below conveyor landing on their back onto the loose rocks. CT scans and x-rays determined they had compound fractures in their T1, T11 and T12 discs in the back along with a bruised lung.
2024 · 1 incident
February 15, 2024OH · Metal/Non-Metalcrusher attendant/operator, pan feeder operator/workerHANDLING OF MATERIALS
Melvin Stone Co. LLC · Caught in, under or between a moving and a stationary object
Employee had locked and tagged out the crusher to adjust the curtain. The rotor was on the "up-stroke" and the employee pushed the rotor over with their hand rather than using a board or steel bar and EE's glove got caught between the rotor and housing. This caused a cut to EE's right thumb requiring 6 stitches.
2018 · 1 incident
April 4, 2018OH · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanMACHINERY
Sergeant Stone Inc · Caught in, under or between a moving and a stationary object
The employee was cleaning the return roller on the crusher. Employee's hand and arm became caught between the roller and belt.