Data / Mines / Thunder Basin Coal Company LLC
Thunder Basin Coal Company LLC: 465 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Thunder Basin Coal Company LLC (MSHA operator ID P24224) operates 2 open mines with 444 employees in Wyoming, mostly coal (bituminous). Since January 1, 2022 MSHA inspectors issued it 465 citations and orders with $402,022 in proposed penalties, and it reported 52 injury or illness cases. Data from MSHA, November 6, 2026.
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- MSHA operator ID
- P24224
- Open mines
- 2
- Employees at open mines
- 444
- States
- Wyoming
- Parent company
- Core Natural Resources Inc
- Citations and orders since January 1, 2022
- 465
- Significant and substantial
- 66 (14.2%)
- Closure orders
- 5
- High negligence or reckless
- 20
- Proposed penalties
- $402,022
- Amount paid so far
- $359,060
- Inspections
- 56
- Inspector hours on site
- 3,947
- Citations per inspection
- 8.30 (all mines 2.30)
- Accident reports
- 77
- Injury and illness cases
- 52
- Fatalities
- 0
- Latest MSHA record
- October 22, 2026
Open mines of Thunder Basin Coal Company LLC
Ranked by citations since January 1, 2022.
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Black Thunder | Thunder Basin Coal Company LLC | Campbell County, WY | Coal (bituminous) | 408 | 394 |
| Coal Creek Mine | Thunder Basin Coal Company LLC | Campbell County, WY | Coal (bituminous) | 36 | 71 |
Citations and injury cases by year
Calendar years since 2022; 2026 runs to the date of the MSHA files.
| Year | Citations and orders | Significant and substantial | Proposed penalties | Injury and illness cases |
|---|---|---|---|---|
| 2022 | 93 | 15 | $156,284 | 11 |
| 2023 | 141 | 19 | $104,915 | 11 |
| 2024 | 58 | 11 | $46,760 | 14 |
| 2025 | 118 | 9 | $48,790 | 8 |
| 2026 | 55 | 12 | $45,273 | 8 |
Standards cited most at Thunder Basin Coal Company LLC
Sections of Title 30 of the Code of Federal Regulations named on the citations, with the part each belongs to.
| Standard | What the part covers | Citations |
|---|---|---|
| 30 CFR 77.1104 | Surface coal mines, safety | 47 |
| 30 CFR 77.502 | Surface coal mines, safety | 44 |
| 30 CFR 77.1110 | Surface coal mines, safety | 35 |
| 30 CFR 77.400 | Surface coal mines, safety | 27 |
| 30 CFR 77.404 | Surface coal mines, safety | 25 |
| 30 CFR 77.1606 | Surface coal mines, safety | 25 |
| 30 CFR 77.1605 | Surface coal mines, safety | 24 |
| 30 CFR 77.512 | Surface coal mines, safety | 21 |
| 30 CFR 77.1607 | Surface coal mines, safety | 20 |
| 30 CFR 77.502-2 | Surface coal mines, safety | 14 |
| 30 CFR 77.505 | Surface coal mines, safety | 13 |
| 30 CFR 77.410 | Surface coal mines, safety | 13 |
| 30 CFR 77.202 | Surface coal mines, safety | 11 |
| 30 CFR 77.807 | Surface coal mines, safety | 10 |
| 30 CFR 77.604 | Surface coal mines, safety | 8 |
Injury and illness cases at Thunder Basin Coal Company LLC
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Permanent disability | 3 |
| Days away from work or restricted activity | 26 |
| No lost time, or an occupational illness | 23 |
What the accident reports at Thunder Basin Coal Company LLC describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Fire | 20 |
| Slip or fall of person | 15 |
| Handling of materials | 14 |
| Powered haulage | 9 |
| Other | 4 |
| Machinery | 4 |
| Handtools (nonpowered) | 4 |
| Ignition or explosion of gas or dust | 3 |
| Disorders (repeated trauma) | 2 |
| Stepping or kneeling on object | 1 |
Equipment named in accident reports at Thunder Basin Coal Company LLC
| Equipment | Reports |
|---|---|
| Ore haulage trucks - off highway trucks | 9 |
| Shovel | 6 |
| Bulldozer | 4 |
| Hand tools (not powered) | 4 |
| Front-end loader | 2 |
| Mancar | 2 |
| Hand tools (powered) | 2 |
| Trucks | 2 |
| Road grader | 2 |
| Mine car | 1 |
Commodities
| Main commodity | Open mines |
|---|---|
| Coal (bituminous) | 2 |
US government work, public domain. Counts come from the MSHA files published on November 6, 2026. An open mine is one MSHA lists as Active, Intermittent, New Mine, Temporarily Idled or NonProducing; 13,673 were open that day. Citations, penalties, inspections and accident reports run from January 1, 2022. A citation is an inspector's allegation and an operator can contest it; the penalty is the amount MSHA first proposed, before any contest or settlement. An operator is the legal entity MSHA assesses, and a parent company is its controller. Mines run by sole proprietors or by individuals are counted in every total and are not named. This page uses MSHA data and is not endorsed or certified by MSHA. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.