O-N Minerals, Cedarville Operation
Active
Surface
Stone
Operator: O-N Minerals (Michigan) Company
Controller: Carmeuse Holding SA
Location: Cedarville, MI, Mackinac County, MI
Employees: 87
827
Violations
160
S&S Violations
93
Accidents
$342K
Penalties
Recent Violations
View all 827 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 12/02/2025 | 56.14116(a) | Non-S&S | LowNegligence | $0 |
| 12/02/2025 | 56.20003(a) | S&S | HighNegligence | $9,757 |
| 06/18/2025 | 56.14207 | Non-S&S | LowNegligence | $151 |
| 06/18/2025 | 56.14207 | Non-S&S | LowNegligence | $151 |
| 06/18/2025 | 56.14132(a) | Non-S&S | LowNegligence | $151 |
| 06/18/2025 | 56.12020 | S&S | ModNegligence | $1,320 |
| 06/18/2025 | 56.20003(b) | Non-S&S | LowNegligence | $151 |
| 06/17/2025 | 56.14107(a) | S&S | LowNegligence | $336 |
| 06/17/2025 | 47.44(b) | Non-S&S | LowNegligence | $151 |
| 06/17/2025 | 56.14100(a) | Non-S&S | LowNegligence | $151 |
| 06/16/2025 | 56.14100(b) | Non-S&S | HighNegligence | $1,126 |
| 06/16/2025 | 56.11001 | S&S | LowNegligence | $755 |
| 06/16/2025 | 56.14107(a) | S&S | LowNegligence | $336 |
| 06/16/2025 | 56.12004 | Non-S&S | ModNegligence | $151 |
| 06/16/2025 | 56.12004 | Non-S&S | ModNegligence | $151 |
| 06/16/2025 | 56.12008 | Non-S&S | ModNegligence | $151 |
| 01/29/2025 | 56.4201(a)(3) | Non-S&S | ModNegligence | $151 |
| 01/28/2025 | 56.4201(a)(2) | Non-S&S | ModNegligence | $151 |
| 01/28/2025 | 56.4601 | Non-S&S | ModNegligence | $151 |
| 01/28/2025 | 56.12032 | Non-S&S | ModNegligence | $151 |
Accidents & Injuries
View all 93 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 02/19/2026 | SLIP OR FALL OF PERSON | DAYS AWAY FROM WORK ONLY | None |
| 08/15/2025 | HANDLING OF MATERIALS | DYS AWY FRM WRK & RESTRCTD ACT | 21d lost, 30d restricted |
| 02/18/2025 | HANDLING OF MATERIALS | DAYS AWAY FROM WORK ONLY | 6d lost |
| 09/26/2024 | HANDLING OF MATERIALS | DAYS RESTRICTED ACTIVITY ONLY | 9d restricted |
| 07/01/2024 | HANDLING OF MATERIALS | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 08/12/2023 | SLIP OR FALL OF PERSON | DYS AWY FRM WRK & RESTRCTD ACT | 11d lost, 19d restricted |
| 07/25/2023 | STEPPING OR KNEELING ON OBJECT | DYS AWY FRM WRK & RESTRCTD ACT | 139d lost, 12d restricted |
| 06/28/2023 | POWERED HAULAGE | DAYS AWAY FROM WORK ONLY | 249d lost |
| 01/18/2023 | SLIP OR FALL OF PERSON | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 08/04/2020 | HANDLING OF MATERIALS | DAYS RESTRICTED ACTIVITY ONLY | 2d restricted |
Inspections
View all 125 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 03/03/2026 | 0.00 | 0 | |
| 12/01/2025 | 12/04/2025 | 37.00 | 1 |
| 06/16/2025 | 06/19/2025 | 90.50 | 2 |
| 01/27/2025 | 01/30/2025 | 36.75 | 1 |
| 01/14/2025 | 01/14/2025 | 21.00 | 1 |
| 11/04/2024 | 11/05/2024 | 17.00 | 1 |
| 09/17/2024 | 09/18/2024 | 16.00 | 1 |
| 05/22/2024 | 05/22/2024 | 2.25 | 1 |
| 05/20/2024 | 05/21/2024 | 23.75 | 1 |
| 05/14/2024 | 05/31/2024 | 26.50 | 1 |
Mine Details
MSHA Mine ID2000061
Mine TypeSurface
StatusActive
CommodityStone
SIC DescriptionCrushed, Broken Limestone NEC
Employees87
Days/Week7.0
Hours/Shift8.0
Coordinates46.0488890, -84.3130560
Nearest TownCedarville, MI
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Frequently Asked Questions
How many MSHA violations does O-N Minerals, Cedarville Operation have?
O-N Minerals, Cedarville Operation has 827 MSHA violations on record, of which 160 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $342K.
What type of mine is O-N Minerals, Cedarville Operation?
O-N Minerals, Cedarville Operation is a Surface mine producing Stone, located in Cedarville, MI, Mackinac County, MI. It currently has 87 employees.
Has anyone been injured or killed at O-N Minerals, Cedarville Operation?
According to MSHA records, O-N Minerals, Cedarville Operation has 93 reported accident/injury records and 1 fatalities on file.
Who operates O-N Minerals, Cedarville Operation?
O-N Minerals, Cedarville Operation is operated by O-N Minerals (Michigan) Company and controlled by Carmeuse Holding SA. MSHA Mine ID: 2000061.