COLONY EAST MILL
Active
Facility
Nonmetal
Operator: American Colloid Company
Controller: Minerals Technologies Inc
Location: Belle Fourche, Crook County, WY
Employees: 32
264
Violations
54
S&S Violations
65
Accidents
$195K
Penalties
Recent Violations
View all 264 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 06/27/2025 | 56.11001 | Non-S&S | ModNegligence | $151 |
| 06/18/2025 | 56.14103(c)(1) | Non-S&S | ModNegligence | $151 |
| 01/22/2025 | 56.16005 | Non-S&S | ModNegligence | $151 |
| 01/22/2025 | 56.12018 | S&S | ModNegligence | $366 |
| 09/11/2024 | 56.14207 | Non-S&S | LowNegligence | $147 |
| 09/11/2024 | 56.13011 | Non-S&S | LowNegligence | $147 |
| 02/27/2024 | 56.20003(a) | Non-S&S | ModNegligence | $147 |
| 02/27/2024 | 56.18002(b) | Non-S&S | HighNegligence | $147 |
| 02/27/2024 | 56.14100(b) | S&S | ModNegligence | $388 |
| 11/01/2022 | 56.14112(b) | Non-S&S | ModNegligence | $133 |
| 11/01/2022 | 56.4201(a)(1) | Non-S&S | ModNegligence | $133 |
| 07/07/2022 | 56.4104(a) | Non-S&S | HighNegligence | $442 |
| 03/10/2022 | 56.18002(b) | Non-S&S | HighNegligence | $144 |
| 03/10/2022 | 56.18002(b) | Non-S&S | LowNegligence | $133 |
| 03/10/2022 | 56.18002(b) | Non-S&S | LowNegligence | $133 |
| 03/10/2022 | 56.18002(b) | Non-S&S | LowNegligence | $133 |
| 03/10/2022 | 56.18002(d) | Non-S&S | HighNegligence | $144 |
| 03/09/2022 | 56.11012 | Non-S&S | ModNegligence | $133 |
| 05/04/2021 | 56.20003(b) | Non-S&S | LowNegligence | $125 |
| 04/08/2021 | 56.14201(b) | Non-S&S | ModNegligence | $125 |
Accidents & Injuries
View all 65 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 10/14/2023 | POWERED HAULAGE | DAYS RESTRICTED ACTIVITY ONLY | 2d restricted |
| 05/01/2023 | OTHER | ALL OTHER CASES (INCL 1ST AID) | None |
| 03/03/2023 | SLIP OR FALL OF PERSON | DAYS AWAY FROM WORK ONLY | 125d lost |
| 02/11/2022 | STEPPING OR KNEELING ON OBJECT | ALL OTHER CASES (INCL 1ST AID) | None |
| 10/05/2021 | HANDLING OF MATERIALS | DYS AWY FRM WRK & RESTRCTD ACT | 37d lost, 90d restricted |
| 11/23/2019 | HANDTOOLS (NONPOWERED) | DAYS RESTRICTED ACTIVITY ONLY | 18d restricted |
| 10/25/2019 | SLIP OR FALL OF PERSON | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 05/27/2019 | HANDLING OF MATERIALS | DYS AWY FRM WRK & RESTRCTD ACT | 58d lost, 64d restricted |
| 09/03/2018 | POWERED HAULAGE | DAYS RESTRICTED ACTIVITY ONLY | 20d restricted |
| 03/13/2018 | HANDLING OF MATERIALS | DAYS RESTRICTED ACTIVITY ONLY | 2d restricted |
Inspections
View all 84 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 03/04/2026 | 0.00 | 0 | |
| 06/18/2025 | 06/30/2025 | 22.00 | 1 |
| 01/22/2025 | 02/06/2025 | 26.00 | 1 |
| 09/11/2024 | 09/16/2024 | 21.50 | 1 |
| 02/27/2024 | 02/29/2024 | 21.00 | 1 |
| 09/05/2023 | 09/13/2023 | 42.00 | 1 |
| 05/17/2023 | 05/17/2023 | 1.25 | 1 |
| 11/01/2022 | 11/07/2022 | 21.00 | 1 |
| 07/05/2022 | 07/08/2022 | 30.75 | 1 |
| 03/08/2022 | 03/18/2022 | 29.00 | 3 |
Mine Details
MSHA Mine ID4800594
Mine TypeFacility
StatusActive
CommodityNonmetal
SIC DescriptionBentonite
Employees32
Days/Week7.0
Hours/Shift12.0
Coordinates44.8655560, -104.1494440
Nearest TownBelle Fourche
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Frequently Asked Questions
How many MSHA violations does COLONY EAST MILL have?
COLONY EAST MILL has 264 MSHA violations on record, of which 54 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $195K.
What type of mine is COLONY EAST MILL?
COLONY EAST MILL is a Facility mine producing Nonmetal, located in Belle Fourche, Crook County, WY. It currently has 32 employees.
Has anyone been injured or killed at COLONY EAST MILL?
According to MSHA records, COLONY EAST MILL has 65 reported accident/injury records and 0 fatalities on file.
Who operates COLONY EAST MILL?
COLONY EAST MILL is operated by American Colloid Company and controlled by Minerals Technologies Inc. MSHA Mine ID: 4800594.