Data / Mines / Michigan / O-N Minerals, Cedarville Operation
O-N Minerals, Cedarville Operation: 110 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
O-N Minerals, Cedarville Operation is an active crushed, broken limestone surface mine in Mackinac County, Michigan, operated by O-N Minerals (Michigan) Company with 87 employees on MSHA's record (mine ID 2000061). Since January 1, 2022 MSHA inspectors issued 110 citations and orders there with $150,435 in proposed penalties, and 10 accident reports were filed there, with 10 injury or illness cases.
The request: Watch O-N Minerals, Cedarville Operation (MSHA mine ID 2000061) in Mackinac County, Michigan: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 2000061
- Status
- Active since April 9, 1991
- Main commodity
- Crushed, broken limestone
- Mine type
- Surface
- County
- Mackinac County, Michigan
- Nearest town
- Cedarville, MI
- Operator
- O-N Minerals (Michigan) Company
- Parent company
- Carmeuse Holding SA
- Employees
- 87
- MSHA field office
- Marquette MI Field Office
- Citations and orders since January 1, 2022
- 110
- Significant and substantial
- 24 (21.8%)
- Closure orders
- 0
- High negligence or reckless
- 10
- Proposed penalties
- $150,435
- Amount paid so far
- $71,237
- Inspections
- 34
- Inspector hours on site
- 570
- Citations per inspection
- 3.24 (all mines 2.30)
- Accident reports
- 10
- Injury and illness cases
- 10
- Fatalities
- 0
- Latest MSHA record
- September 2, 2026
- Citations issued to contractors here
- 1 ($167 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 |
|---|---|---|---|---|
| 2022 | 39 | 7 | $28,636 | 0 |
| 2023 | 20 | 6 | $22,957 | 4 |
| 2024 | 13 | 1 | $1,953 | 2 |
| 2025 | 21 | 5 | $16,011 | 2 |
| 2026 | 17 | 5 | $80,878 | 2 |
Standards cited most at O-N Minerals, Cedarville Operation
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 56.20003 | Surface metal and nonmetal mines | 11 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 8 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 7 |
| 30 CFR 56.20011 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.14207 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.12019 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.18002 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.11012 | Surface metal and nonmetal mines | 3 |
| 30 CFR 47.44 | Hazard communication | 3 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.14109 | Surface metal and nonmetal mines | 3 |
Injury and illness cases at O-N Minerals, Cedarville Operation
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 8 |
| No lost time, or an occupational illness | 2 |
What the accident reports at O-N Minerals, Cedarville Operation describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 4 |
| Slip or fall of person | 3 |
| Falling/sliding/rolling materials | 1 |
| Stepping or kneeling on object | 1 |
| Powered haulage | 1 |
Equipment named in accident reports at O-N Minerals, Cedarville Operation
| Equipment | Reports |
|---|---|
| Front-end loader | 1 |
Other open mines in Mackinac County, Michigan
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Pointe North | Csi Sands NE LTD. | Mackinac County, MI | Sand, industrial | 16 | 36 |
| Bill Burton Pit | Precision Excavation, Inc. | Mackinac County, MI | Construction sand and gravel | 1 | 7 |
| Portable Screen Plant | Con Agg Inc | Mackinac County, MI | Construction sand and gravel | 3 | 1 |
| 390 Findlay Hydraulic Screen | Con Agg Inc | Mackinac County, MI | Crushed, broken limestone | 2 | 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.