Data / Mines / Wyoming / Coal mines

Coal mines in Wyoming: 17 open mines and MSHA citations

MSHA lists 17 open coal mines in Wyoming, run by 13 operators and employing 3,663 people. Since January 1, 2022 its inspectors issued 2,128 citations and orders there with $1,873,385 in proposed penalties, and operators reported 273 injury or illness cases. The operators with the most open mines are Thunder Basin Coal Company LLC; Eagle Specialty Materials LLC; Peabody Caballo Mining, LLC. Data from MSHA, November 6, 2026.

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Open mines

17

Operators

13

Employees

3,663

Active

15

Temporarily Idled

1

NonProducing

1

Citations and orders since January 1, 2022

2,128

Significant and substantial

294 (13.8%)

Closure orders

17

High negligence or reckless

103

Proposed penalties

$1,873,385

Amount paid so far

$1,471,296

Inspections

384

Inspector hours on site

19,941

Citations per inspection

5.54 (all mines 2.30)

Accident reports

384

Injury and illness cases

273

Fatalities

0

Latest MSHA record

November 4, 2026

Operators with the most open mines in Wyoming

Ranked by open mines, then by citations. Sole proprietors and individuals are not listed.

Operators with the most citations in Wyoming

Citations and orders issued since January 1, 2022 at their open mines here.

Mines with the most citations

Open mines, ranked by citations and orders since January 1, 2022.

Citations and injury cases by year

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

Standards cited most at coal mines in Wyoming

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 coal mines in Wyoming

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

What the accident reports at coal mines in Wyoming describe

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

Equipment named in accident reports at coal mines in Wyoming

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