Data / Mines / Wyoming / Colony East Mill
Colony East Mill, Crook County, Wyoming: 20 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Colony East Mill is an active bentonite processing facility in Crook County, Wyoming, operated by American Colloid Company Mineral Group with 34 employees on MSHA's record (mine ID 4800594). Since January 1, 2022 MSHA inspectors issued 20 citations and orders there with $3,625 in proposed penalties, and 4 accident reports were filed there, with 4 injury or illness cases.
The request: Watch Colony East Mill (MSHA mine ID 4800594) in Crook County, Wyoming: each new citation and each accident report. $10 of work on sign-up, no card.
SpecStream is the live web data engine for teams and agents. It reads the mine, citation, inspection and accident files that MSHA publishes, and this page is that reading. Ask for the mines of a commodity, state or operator with the operator's headquarters, website and size added from the web, and new mines, new citations and new accident reports arrive in your sheet, CRM, Slack or agent as MSHA posts them.
- MSHA mine ID
- 4800594
- Status
- Active since January 1, 2025
- Main commodity
- Bentonite
- Mine type
- Facility
- County
- Crook County, Wyoming
- Nearest town
- Belle Fourche
- Operator
- American Colloid Company Mineral Group
- Parent company
- Minerals Technologies Inc
- Employees
- 34
- MSHA field office
- Gillette WY Field Office
- Citations and orders since January 1, 2022
- 20
- Significant and substantial
- 2 (10.0%)
- Closure orders
- 0
- High negligence or reckless
- 4
- Proposed penalties
- $3,625
- Amount paid so far
- $3,625
- Inspections
- 11
- Inspector hours on site
- 126
- Citations per inspection
- 1.82 (all mines 2.30)
- Accident reports
- 4
- Injury and illness cases
- 4
- Fatalities
- 0
- Latest MSHA record
- June 2, 2026
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 |
|---|---|---|---|---|
| 2022 | 9 | 0 | $1,528 | 1 |
| 2023 | 0 | 0 | $0 | 3 |
| 2024 | 5 | 1 | $976 | 0 |
| 2025 | 4 | 1 | $819 | 0 |
| 2026 | 2 | 0 | $302 | 0 |
Standards cited most at Colony East Mill
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 56.18002 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.16005 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.11012 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12030 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14103 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.4104 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14207 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.13011 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 1 |
Injury and illness cases at Colony East Mill
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 Colony East Mill describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Powered haulage | 1 |
| Slip or fall of person | 1 |
| Other | 1 |
| Stepping or kneeling on object | 1 |
Equipment named in accident reports at Colony East Mill
| Equipment | Reports |
|---|---|
| Front-end loader | 1 |
Other open mines in Crook County, Wyoming
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Belle/Colony Mine | American Colloid Company Mineral Group | Crook County, WY | Bentonite | 77 | 41 |
| BPM Colony Mill | Bentonite Performance Minerals, LLC | Crook County, WY | Bentonite | 70 | 34 |
| Colony West Mill | American Colloid Company Mineral Group | Crook County, WY | Bentonite | 30 | 23 |
| BPM Colony Mine | Bentonite Performance Minerals, LLC | Crook County, WY | Clay, ceramic, refractory mnls. | 58 | 10 |
| Crusher 2 | Croell, Inc. | Crook County, WY | Construction sand and gravel | 4 | 10 |
| Crusher | Iron Creek Services, LLC | Crook County, WY | Construction sand and gravel | 4 | 7 |
| Qac #2 | Quality Agg & Construction Inc | Crook County, WY | Construction sand and gravel | 3 | 4 |
| Qac #4 | Quality Agg & Construction Inc | Crook County, WY | Construction sand and gravel | 3 | 2 |
| Impactor Spread | Quality Agg & Construction Inc | Crook 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.