Onyx Energy, LLC operator
Controlled by
Mohegan Energy Trustees LLC
MSHA operator ID: 0098205
- Fatalities
- 0
- Total incidents
- 13
- Mines on record
- 5
- Years on record
- 2013–2026
Compliance record
MSHA citations since 2009
304
citations
61
significant & substantial
$159,633
proposed penalties
$51,050
paid to date
32% of proposed penalties paid to date, a $108,583 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2009
221
inspections on record
5,652
inspection hours
5.4
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.304 citations across 5,652 inspection hours.
Source: MSHA inspections data, updated weekly.
Penalty disposition
ⓘ
Differences between proposed and paid penalties reflect both settlements and conference reductions and amounts still owed. Outstanding is the balance currently owed.$160K
proposed penalties
$99K
current assessed
$51K
paid to date
$48K
outstanding
291 assessments are final orders; 5 contested dockets.
As of the most recent assessment on 2026-04-08.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
Top causes
- HANDLING OF MATERIALS 4 non-fatal
- SLIP OR FALL OF PERSON 3 non-fatal
- HANDTOOLS (NONPOWERED) 2 non-fatal
- MACHINERY 2 non-fatal
- FIRE 1 non-fatal
- POWERED HAULAGE 1 non-fatal
Incident timeline
2026
1
2024
1
2023
1
2022
1
2021
1
2018
1
2017
2
2016
3
2015
1
2013
1
Mines on record
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For insurers, brokers, and safety consultants
The full compliance file on Onyx Energy, LLC
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.