Data / Mines / Wyoming / Glenrock Mine 01
Glenrock Mine 01: 19 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Glenrock Mine 01 is an active construction sand and gravel surface mine in Converse County, Wyoming, operated by Powder River Proppants, LLC with 10 employees on MSHA's record (mine ID 4801891). Since January 1, 2022 MSHA inspectors issued 19 citations and orders there with $11,289 in proposed penalties, and 4 accident reports were filed there, with 4 injury or illness cases.
The request: Watch Glenrock Mine 01 (MSHA mine ID 4801891) in Converse County, Wyoming: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 4801891
- Status
- Active since November 9, 2024
- Main commodity
- Construction sand and gravel
- Mine type
- Surface
- County
- Converse County, Wyoming
- Nearest town
- Glenrock
- Operator
- Powder River Proppants, LLC
- Employees
- 10
- MSHA field office
- Gillette WY Field Office
- Citations and orders since January 1, 2022
- 19
- Significant and substantial
- 4 (21.1%)
- Closure orders
- 0
- High negligence or reckless
- 1
- Proposed penalties
- $11,289
- Amount paid so far
- $1,343
- Inspections
- 8
- Inspector hours on site
- 104
- Citations per inspection
- 2.38 (all mines 2.30)
- Accident reports
- 4
- Injury and illness cases
- 4
- Fatalities
- 0
- Latest MSHA record
- August 3, 2026
- Citations issued to contractors here
- 1 ($165 proposed)
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 |
|---|---|---|---|---|
| 2024 | 4 | 0 | $588 | 0 |
| 2025 | 13 | 4 | $10,399 | 3 |
| 2026 | 2 | 0 | $302 | 1 |
Standards cited most at Glenrock Mine 01
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 50.30 | Reporting of accidents, injuries and illnesses | 2 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14105 | Surface metal and nonmetal mines | 1 |
| 30 CFR 50.10 | Reporting of accidents, injuries and illnesses | 1 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 1 |
| 30 CFR 50.20-1 | Reporting of accidents, injuries and illnesses | 1 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.9101 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.3430 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14206 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14109 | Surface metal and nonmetal mines | 1 |
Injury and illness cases at Glenrock Mine 01
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 2 |
| No lost time, or an occupational illness | 2 |
What the accident reports at Glenrock Mine 01 describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Machinery | 2 |
| Stepping or kneeling on object | 1 |
| Hoisting | 1 |
Equipment named in accident reports at Glenrock Mine 01
| Equipment | Reports |
|---|---|
| Welding machine | 1 |
| Elevator | 1 |
| Shovel | 1 |
Other open mines in Converse County, Wyoming
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Antelope Coal Mine | Navajo Transitional Energy Company, LLC | Converse County, WY | Coal (bituminous) | 430 | 78 |
| Douglas Quarry | Russell Construction Company | Converse County, WY | Construction sand and gravel | 3 | 20 |
| B&M Sand and Gravel, Inc. | B&M Sand and Gravel | Converse County, WY | Construction sand and gravel | 3 | 17 |
| Glenrock Mill | Black Hills Lignite a Limited Liability Co | Converse County, WY | Leonardite | 6 | 13 |
| Crusher #1 | 383 Construction LLC | Converse County, WY | Construction sand and gravel | 2 | 12 |
| Douglas Wash Plant | Croell, Inc. | Converse County, WY | Construction sand and gravel | 3 | 11 |
| Screen #1 | 383 Construction LLC | Converse County, WY | Construction sand and gravel | 1 | 7 |
| Glenrock Mine | Black Hills Lignite a Limited Liability Co | Converse County, WY | Leonardite | 5 | 6 |
| Jaw Crusher JS3750 | Wyoming Earthmoving Corporation | Converse County, WY | Construction sand and gravel | 4 | 6 |
| West Crusher #4 | Croell, Inc. | Converse County, WY | Crushed, broken limestone | 4 | 2 |
| Dirt Crew #2 | Croell, Inc. | Converse County, WY | Construction sand and gravel | 3 | 1 |
| Q3 | Stone Royale LLC | Converse County, WY | Construction sand and gravel | 3 | 0 |
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.