Mining Incidents

Saturn Surface Mine Coal

Onyx Energy, LLC · Surface
Matoka, Mercer County, WV  ·  NonProducing
MSHA Mine ID: 4609568

Saturn Surface Mine has $41K in proposed MSHA penalties and $15K outstanding across 5 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
1
Years on record
2025
Latest incident
Dec 2025
Compliance record
MSHA citations since 2021
69
citations
18
significant & substantial
$40,851
proposed penalties
$10,915
paid to date
27% of proposed penalties paid to date, a $29,936 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2021
22
inspections on record
815
inspection hours
n/a
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: 815 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Saturn Surface Mine has $41K in proposed MSHA penalties and $15K outstanding across 5 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.
$41K
proposed penalties
$26K
current assessed
$11K
paid to date
$15K
outstanding
68 assessments are final orders; 5 contested dockets.
As of the most recent assessment on 2026-02-09.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.

MSHA sampling at Saturn Surface Mine shows respirable coal dust averaging 0.15 mg/m3 (100% compliant) across 107 samples.

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.
0.15
dust avg (mg/m3)
1.29
dust max (mg/m3)
100%
within 1.5 mg/m3
107
samples
Most recent sample: 2026-03-09.
Silica (quartz)
9.1
silica avg (%)
24.0
silica max (%)
20
samples
Most recent sample: 2026-02-10.
Noise
0%
over PEL
26
samples
Most recent sample: 2026-02-09.
Source: MSHA respirable dust, quartz, and noise sampling records, updated weekly.
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
2025 Q4 3,098 0 0 0.0
2025 Q3 6,174 4 2 647.9
2025 Q2 33,156 0 0 0.0
2025 Q1 36,801 9 5 244.6
2024 Q4 35,721 0 0 0.0
2024 Q3 33,270 1 0 30.1
2024 Q2 25,377 3 0 118.2
2024 Q1 25,912 8 2 308.7
Show 10 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2023 Q4 24,397 4 1 164.0
2023 Q3 30,290 12 7 396.2
2023 Q2 29,648 4 0 134.9
2023 Q1 32,605 1 0 30.7
2022 Q4 32,838 7 0 213.2
2022 Q3 30,912 0 0 0.0
2022 Q2 28,762 3 1 104.3
2022 Q1 27,175 4 0 147.2
2021 Q4 22,988 0 0 0.0
2021 Q3 6,265 2 0 319.2
No fatalities recorded at this mine.

Reportable incidents

1 on file

2025 · 1 incident

December 30, 2025 WV · Coal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Stacy Equipment and Repairs, Incorporated · Over-exertion (Not Elsewhere Classified)

Stemming for a shot, ground was frozen, shoveling was tough, hit something solid and the impact jolted right wrist - filled statement out on 1/8/26

For insurers, brokers, and safety consultants

The full compliance file on Saturn Surface Mine

A dated report covering the 26-year penalty trail, line-item violation pattern, contest and docket posture, rate-normalized peer benchmark, and full fatality history. Delivered as a PDF with the underlying data as CSV.