Black Thunder
Active
Surface
Coal
Operator: Thunder Basin Coal Company LLC
Controller: Core Natural Resources Inc
Location: Wright, Campbell County, WY
Employees: 408
1,578
Violations
346
S&S Violations
569
Accidents
$1.3M
Penalties
Recent Violations
View all 1,578 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 02/11/2026 | 77.1607(c) | S&S | LowNegligence | $0 |
| 11/04/2025 | 77.1104 | Non-S&S | ModNegligence | $313 |
| 11/04/2025 | 77.502 | S&S | ModNegligence | $366 |
| 11/03/2025 | 77.512 | Non-S&S | ModNegligence | $193 |
| 11/03/2025 | 77.502 | Non-S&S | ModNegligence | $288 |
| 10/30/2025 | 77.1110 | Non-S&S | LowNegligence | $151 |
| 10/22/2025 | 77.502 | S&S | ModNegligence | $2,133 |
| 10/22/2025 | 77.502 | S&S | LowNegligence | $2,133 |
| 10/22/2025 | 77.1605(a) | Non-S&S | ModNegligence | $193 |
| 10/22/2025 | 77.1607(n) | Non-S&S | ModNegligence | $193 |
| 10/22/2025 | 77.1606(b) | Non-S&S | ModNegligence | $193 |
| 10/21/2025 | 77.1104 | Non-S&S | LowNegligence | $151 |
| 10/21/2025 | 77.1605(d) | Non-S&S | LowNegligence | $151 |
| 10/20/2025 | 77.404(a) | Non-S&S | LowNegligence | $151 |
| 10/20/2025 | 77.410(c) | Non-S&S | LowNegligence | $151 |
| 10/16/2025 | 77.904 | Non-S&S | ModNegligence | $193 |
| 10/16/2025 | 77.502 | Non-S&S | HighNegligence | $267 |
| 10/16/2025 | 77.502-2 | Non-S&S | HighNegligence | $642 |
| 10/15/2025 | 77.1110 | Non-S&S | LowNegligence | $151 |
| 10/15/2025 | 77.404(a) | Non-S&S | LowNegligence | $151 |
Accidents & Injuries
View all 569 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 01/22/2026 | SLIP OR FALL OF PERSON | DAYS AWAY FROM WORK ONLY | None |
| 01/19/2026 | FIRE | ACCIDENT ONLY | None |
| 01/09/2026 | SLIP OR FALL OF PERSON | DAYS AWAY FROM WORK ONLY | None |
| 12/23/2025 | HANDLING OF MATERIALS | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 12/18/2025 | HANDTOOLS (NONPOWERED) | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 11/13/2025 | SLIP OR FALL OF PERSON | DYS AWY FRM WRK & RESTRCTD ACT | 11d lost, 1d restricted |
| 11/05/2025 | FIRE | ACCIDENT ONLY | None |
| 10/23/2025 | FIRE | ACCIDENT ONLY | None |
| 09/22/2025 | HANDLING OF MATERIALS | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 09/20/2025 | FIRE | ACCIDENT ONLY | None |
Inspections
View all 364 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 02/04/2026 | 02/11/2026 | 14.75 | 2 |
| 10/23/2025 | 10/23/2025 | 6.00 | 1 |
| 10/01/2025 | 11/13/2025 | 551.50 | 8 |
| 06/17/2025 | 09/18/2025 | 486.50 | 10 |
| 12/18/2024 | 03/04/2025 | 469.75 | 11 |
| 12/16/2024 | 01/21/2025 | 89.00 | 1 |
| 12/09/2024 | 12/10/2024 | 7.50 | 1 |
| 11/17/2024 | 12/10/2024 | 19.75 | 1 |
| 09/17/2024 | 09/25/2024 | 15.00 | 1 |
| 07/17/2024 | 07/18/2024 | 15.00 | 2 |
Mine Details
MSHA Mine ID4800977
Mine TypeSurface
StatusActive
CommodityCoal
SIC DescriptionCoal (Bituminous)
Employees408
Days/Week7.0
Hours/Shift12.0
Coordinates42.6936110, -105.2666670
Nearest TownWright
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Frequently Asked Questions
How many MSHA violations does Black Thunder have?
Black Thunder has 1578 MSHA violations on record, of which 346 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $1.3M.
What type of mine is Black Thunder?
Black Thunder is a Surface mine producing Coal, located in Wright, Campbell County, WY. It currently has 408 employees.
Has anyone been injured or killed at Black Thunder?
According to MSHA records, Black Thunder has 569 reported accident/injury records and 4 fatalities on file.
Who operates Black Thunder?
Black Thunder is operated by Thunder Basin Coal Company LLC and controlled by Core Natural Resources Inc. MSHA Mine ID: 4800977.