Mining Incidents

Thunder Basin Coal Company LLC operator

Controlled by Core Natural Resources Inc
MSHA operator ID: P24224

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Email me when a new MSHA incident is filed at any Thunder Basin Coal Company LLC mine.

Fatalities
4
Total incidents
591
Mines on record
2
Years on record
2000–2026
Compliance record
MSHA citations since 2000
1,572
citations
281
significant & substantial
$1,284,268
proposed penalties
$1,173,796
paid to date
Source: MSHA violations data, updated weekly.

Top causes

Incident timeline

2026
6
2025
12
2024
20
2023
19
2022
15
2021
15 (1f)
2020
7
2019
16
2018
15
2017
19
2016
15
2015
29
2014
22
2013
35 (1f)
2012
31
2011
16
2010
21
2009
21
2008
41
2007
32
2006
52
2005
33
2004
24
2003
24 (1f)
2002
16 (1f)
2001
9
2000
26

Mines on record

Fatalities under this operator

4 recorded
July 21, 2021 WY · Coal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech Fatality · MACHINERY
Thunder Basin Coal Company LLC · Struck by falling object

A Millwright drove the pins out of a 200-ton crane boom to change out a section and the boom fell on employee.

August 16, 2013 WY · Coal utility man, shift tech, service/dump truck operator Fatality · MACHINERY
Thunder Basin Coal Company LLC · Caught in, under or between a moving and a stationary object

The technician was assisting in moving a 2800 P&H shovel when the machine lost propel capabilities. The machine then rolled in reverse striking the pickup driven by the technician causing fatal injuries.

February 20, 2003 WY · Coal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator Fatality · SLIP OR FALL OF PERSON
Thunder Basin Coal Company LLC · Fall to lower level, (Not Elsewhere Classified)

AFTER OVERSEEING THE ACTIVITIES OF CONTRACTORS WORKING ON THE BELT 614 LEVEL, EMPLOYEE LEFT AND WENT UP THREE FLIGHTS OF STAIRS TO THE 612 BELT LEVEL WHERE THE ELEVATOR TO THE SURFACE WAS LOCA TED. WITHIN A MINUTE OR TWO OF LEAVING, HE FELL THROUGH A 4X4 OPENING THAT HAD BEEN USED TO LOWER PARTS. THE HOLE HAD FLAGGING AT ALL ENTRIES AT LEAST 4' FROM THE EDGE. HE FELL 19' TO THE BEL

February 20, 2002 WY · Coal bulldozer operator, universal operator, heavy equipment operator, operating engineer Fatality · FALL OF FACE/RIB/PILLAR/SIDE/HIGHWALL
Thunder Basin Coal Company LLC · Struck by falling object

EE WAS CLEANING UP AROUND THE 8 SHOVEL. EYEWITNESS SAYS "A LARGE ROCK CAME DOWN AND HIT THE 86 DIRECTLY ON THE RIGHT SIDE OF THE ROPS...SMASHING THE CAB." EE WAS KILLED INSTANTANEOUSLY BY THE IMPACT ACCORDING TO THE DEPUTY CORONER.