Key Takeaway
O-N Minerals - Calcite Operation is a active surface mine producing Stone, located in Rogers City, Presque Isle County, MI. It has 967 violations on record (121 S&S) and $248K in proposed penalties. Operated by O-N Minerals (Michigan) Company.
O-N Minerals - Calcite Operation
Operator: O-N Minerals (Michigan) Company
Controller: Carmeuse Holding SA
Location: Rogers City, Presque Isle County, MI
Employees: 130
Recent Violations
View all 967 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 01/21/2026 | 56.20003(a) | Non-S&S | LowNegligence | $0 |
| 01/20/2026 | 56.12017 | Non-S&S | ModNegligence | $0 |
| 01/14/2026 | 56.12004 | Non-S&S | LowNegligence | $0 |
| 01/13/2026 | 56.11012 | S&S | ModNegligence | $0 |
| 01/13/2026 | 56.14100(b) | Non-S&S | LowNegligence | $0 |
| 01/07/2026 | 56.16006 | Non-S&S | ModNegligence | $267 |
| 01/06/2026 | 56.14115(b) | S&S | ModNegligence | $1,968 |
| 01/06/2026 | 56.20003(a) | S&S | ModNegligence | $1,320 |
| 01/05/2026 | 56.11012 | Non-S&S | LowNegligence | $151 |
| 01/05/2026 | 56.12032 | Non-S&S | ModNegligence | $267 |
| 01/05/2026 | 56.16006 | Non-S&S | ModNegligence | $267 |
| 01/05/2026 | 46.8 | Non-S&S | ModNegligence | $168 |
| 01/05/2026 | 56.12018 | Non-S&S | ModNegligence | $267 |
| 05/08/2025 | 56.14132(b)(1) | Non-S&S | LowNegligence | $151 |
| 05/08/2025 | 56.14101(a)(2) | Non-S&S | LowNegligence | $151 |
| 05/08/2025 | 56.14101(a)(2) | Non-S&S | LowNegligence | $151 |
| 05/07/2025 | 56.14107(a) | S&S | LowNegligence | $642 |
| 05/07/2025 | 56.12018 | Non-S&S | LowNegligence | $151 |
| 05/06/2025 | 56.14207 | Non-S&S | LowNegligence | $151 |
| 05/06/2025 | 56.12032 | Non-S&S | LowNegligence | $151 |
Accidents & Injuries
View all 196 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 12/19/2025 | SLIP OR FALL OF PERSON | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 12/04/2025 | FALLING/SLIDING/ROLLING MATERIALS | DAYS RESTRICTED ACTIVITY ONLY | 4d restricted |
| 10/28/2025 | HANDLING OF MATERIALS | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 08/14/2025 | HANDLING OF MATERIALS | DYS AWY FRM WRK & RESTRCTD ACT | 86d lost, 15d restricted |
| 08/01/2025 | NONPOWERED HAULAGE | DAYS RESTRICTED ACTIVITY ONLY | 4d restricted |
| 05/29/2025 | SLIP OR FALL OF PERSON | DAYS RESTRICTED ACTIVITY ONLY | 16d restricted |
| 05/27/2025 | HANDLING OF MATERIALS | DAYS RESTRICTED ACTIVITY ONLY | 4d restricted |
| 03/07/2025 | SLIP OR FALL OF PERSON | DAYS RESTRICTED ACTIVITY ONLY | 10d restricted |
| 03/03/2025 | HANDLING OF MATERIALS | DAYS RESTRICTED ACTIVITY ONLY | 4d restricted |
| 12/08/2024 | HANDLING OF MATERIALS | DAYS RESTRICTED ACTIVITY ONLY | 37d restricted |
Inspections
View all 110 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 01/05/2026 | 01/22/2026 | 141.00 | 1 |
| 09/23/2025 | 09/23/2025 | 14.75 | 1 |
| 04/08/2025 | 05/09/2025 | 165.75 | 2 |
| 01/07/2025 | 01/07/2025 | 18.75 | 1 |
| 12/10/2024 | 12/10/2024 | 3.75 | 1 |
| 10/06/2024 | 12/05/2024 | 185.75 | 2 |
| 09/16/2024 | 09/17/2024 | 20.75 | 1 |
| 06/03/2024 | 06/25/2024 | 139.50 | 1 |
| 01/02/2024 | 01/19/2024 | 180.50 | 2 |
| 12/12/2023 | 12/13/2023 | 7.25 | 1 |
Mine Details
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Frequently Asked Questions
How many MSHA violations does O-N Minerals - Calcite Operation have?
O-N Minerals - Calcite Operation has 967 MSHA violations on record, of which 121 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $248K.
What type of mine is O-N Minerals - Calcite Operation?
O-N Minerals - Calcite Operation is a Surface mine producing Stone, located in Rogers City, Presque Isle County, MI. It currently has 130 employees.
Has anyone been injured or killed at O-N Minerals - Calcite Operation?
According to MSHA records, O-N Minerals - Calcite Operation has 196 reported accident/injury records and 0 fatalities on file.
Who operates O-N Minerals - Calcite Operation?
O-N Minerals - Calcite Operation is operated by O-N Minerals (Michigan) Company and controlled by Carmeuse Holding SA. MSHA Mine ID: 2000062.