Data / Mines / Wyoming / Black Thunder

Black Thunder, Campbell County, Wyoming: 394 MSHA citations

Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.

Black Thunder is an active coal (bituminous) surface mine in Campbell County, Wyoming, operated by Thunder Basin Coal Company LLC with 408 employees on MSHA's record (mine ID 4800977). Since January 1, 2022 MSHA inspectors issued 394 citations and orders there with $357,909 in proposed penalties, and 74 accident reports were filed there, with 50 injury or illness cases.

The request: Watch Black Thunder (MSHA mine ID 4800977) in Campbell County, Wyoming: each new citation and each accident report. $10 of work on sign-up, no card.

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MSHA mine ID

4800977

Status

Active since December 1, 1980

Main commodity

Coal (bituminous)

Mine type

Surface

County

Campbell County, Wyoming

Nearest town

Wright

Operator

Thunder Basin Coal Company LLC

Parent company

Core Natural Resources Inc

Employees

408

MSHA field office

Gillette WY Field Office

Citations and orders since January 1, 2022

394

Significant and substantial

56 (14.2%)

Closure orders

5

High negligence or reckless

13

Proposed penalties

$357,909

Amount paid so far

$339,547

Inspections

43

Inspector hours on site

3,204

Citations per inspection

9.16 (all mines 2.30)

Accident reports

74

Injury and illness cases

50

Fatalities

0

Latest MSHA record

October 22, 2026

Citations issued to contractors here

85 ($29,221 proposed)

Citations and injury cases by year

Calendar years since 2022; 2026 runs to the date of the MSHA files.

Standards cited most at Black Thunder

Sections of Title 30 of the Code of Federal Regulations named on the citations, with the part each belongs to.

Injury and illness cases at Black Thunder

Accident reports by degree of injury, as the operator reported them to MSHA.

What the accident reports at Black Thunder describe

Accident classification, as MSHA codes the circumstances that contributed most directly.

Equipment named in accident reports at Black Thunder

Other open mines in Campbell County, Wyoming

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.