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: 362 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Corbet South Mine has $2K 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.
$2K
proposed penalties
$2K
current assessed
$2K
paid to date
$0
outstanding
4 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2018-10-16.
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.
MSHA sampling at Corbet South Mine shows 98% of 59 respirable coal dust samples met the 1.5 mg/m3 standard.
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.
Respirable coal dust
ⓘRespirable coal dust and silica figures cover coal facilities. Dust compliance is measured against the current 1.5 mg/m3 standard; samples predating the 2014 standard are included, so compliance rates are a coarse historical signal.
Last sampled: 2024-06-05
98%
within 1.5 mg/m3
59
samples
1.61
dust max (mg/m3)
0
over MSHA ECV
ⓘThe excessive concentration value (ECV) is MSHA's own per-sample enforcement threshold, which builds in measurement uncertainty; a sample over its ECV can trigger a citation. The count covers only samples MSHA assigned an ECV.
20 samples taken by MSHA inspectors, 39 by the operator.
Noise
ⓘThe share counts noise samples whose measured dose exceeded the 90 dBA permissible exposure limit. It describes the sampled workplace, not what reached the miner's ear: hearing conservation programs and the hearing protection worn during the shift are recorded separately and are not reflected here.
Health sampling trend
ⓘ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.
Respirable coal dust by year
ⓘRespirable coal dust and silica figures cover coal facilities. Dust compliance is measured against the current 1.5 mg/m3 standard; samples predating the 2014 standard are included, so compliance rates are a coarse historical signal.
Source: MSHA controller and operator history, updated weekly.
Workforce and production
ⓘCoal production is reported quarterly and lags the current period; the most recent quarters may be incomplete.
Year
Employees
Coal produced (tons)
2026
0
2025
0
2024
1
6,083
2023
4
35,539
2022
3
36,660
2021
1
7,265
2020
2
8,918
2019
2
16,574
2018
4
482
Source: MSHA quarterly employment and production, updated weekly.
Corbet South Mine sits in Clearfield County, Pennsylvania, where the Census mining category is 1.3% 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.
Clearfield County, Pennsylvania · Population 78,902
1.3%
Mining share of county employment
$60,181
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
0
0
0
2026 Q1
0
0
0
2025 Q4
0
0
0
2025 Q3
0
0
0
2025 Q2
0
0
0
2025 Q1
0
0
0
2024 Q4
0
0
0
2024 Q3
0
0
0
Show 24 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
133
0
0
0.0
2024 Q1
1,235
0
0
0.0
2023 Q4
2,929
0
0
0.0
2023 Q3
2,236
0
0
0.0
2023 Q2
2,406
0
0
0.0
2023 Q1
2,587
0
0
0.0
2022 Q4
2,289
0
0
0.0
2022 Q3
2,304
0
0
0.0
2022 Q2
1,293
0
0
0.0
2022 Q1
875
0
0
0.0
2021 Q4
854
0
0
0.0
2021 Q3
194
0
0
0.0
2021 Q2
161
0
0
0.0
2021 Q1
148
0
0
0.0
2020 Q4
335
0
0
0.0
2020 Q3
325
0
0
0.0
2020 Q2
845
0
0
0.0
2020 Q1
838
0
0
0.0
2019 Q4
780
0
0
0.0
2019 Q3
465
0
0
0.0
2019 Q2
1,389
0
0
0.0
2019 Q1
2,147
0
0
0.0
2018 Q4
2,781
0
0
0.0
2018 Q3
973
1
1
1027.7
No fatalities recorded at this mine.
Reportable incidents
1 on file
2022 · 1 incident
August 31, 2022PA · Coalbulldozer operator, universal operator, heavy equipment operator, operating engineerHANDTOOLS (NONPOWERED)
RES Coal LLC · Struck by... (Not Elsewhere Classified)
Employee was installing a new CB radio in a dozer. Employee had left hand on seat of dozer and was cutting a wire tie with a utility knife in right hand. Knife cut through the wire tie and then struck the employee on the back of left hand causing a laceration. The laceration required stitches to close the wound.