Data / Mines / Michigan / Oakland County
Mines in Oakland County, Michigan: 11 open mines
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
MSHA lists 11 open mines in Oakland County, Michigan, run by 7 operators and employing 102 people. Since January 1, 2022 its inspectors issued 89 citations and orders there with $13,917 in proposed penalties, and operators reported 11 injury or illness cases. The operators with the most open mines are American Aggregates Of Michigan Inc; Burroughs Materials Corp; Tri-City Aggregates Inc. Data from MSHA, November 6, 2026.
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- Open mines
- 11
- Operators
- 7
- Employees
- 102
- Active
- 6
- Intermittent
- 4
- Temporarily Idled
- 1
- Citations and orders since January 1, 2022
- 89
- Significant and substantial
- 9 (10.1%)
- Closure orders
- 0
- High negligence or reckless
- 2
- Proposed penalties
- $13,917
- Amount paid so far
- $13,886
- Inspections
- 92
- Inspector hours on site
- 1,032
- Citations per inspection
- 0.97 (all mines 2.30)
- Accident reports
- 11
- Injury and illness cases
- 11
- Fatalities
- 0
- Latest MSHA record
- October 23, 2026
Operators with the most open mines in Oakland County, Michigan
Ranked by open mines, then by citations. Sole proprietors and individuals are not listed.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| American Aggregates Of Michigan Inc | 3 | 30 | 33 | $4,255 | 5 |
| Burroughs Materials Corp | 2 | 21 | 8 | $1,261 | 4 |
| Tri-City Aggregates Inc | 2 | 27 | 1 | $133 | 0 |
| Koenig Materials, LLC | 1 | 7 | 17 | $2,564 | 1 |
| South Flint Gravel Inc | 1 | 5 | 15 | $3,656 | 0 |
| I-75 Aggregates | 1 | 10 | 11 | $1,452 | 0 |
| United Dredging | 1 | 2 | 4 | $596 | 1 |
Operators with the most citations in Oakland County, Michigan
Citations and orders issued since January 1, 2022 at their open mines here.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| American Aggregates Of Michigan Inc | 3 | 30 | 33 | $4,255 | 5 |
| Koenig Materials, LLC | 1 | 7 | 17 | $2,564 | 1 |
| South Flint Gravel Inc | 1 | 5 | 15 | $3,656 | 0 |
| I-75 Aggregates | 1 | 10 | 11 | $1,452 | 0 |
| Burroughs Materials Corp | 2 | 21 | 8 | $1,261 | 4 |
| United Dredging | 1 | 2 | 4 | $596 | 1 |
| Tri-City Aggregates Inc | 2 | 27 | 1 | $133 | 0 |
Mines with the most citations
Open mines, ranked by citations and orders since January 1, 2022.
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Highland Plant | American Aggregates Of Michigan Inc | Oakland County, MI | Construction sand and gravel | 16 | 18 |
| Koenig Materials, LLC | Koenig Materials, LLC | Oakland County, MI | Construction sand and gravel | 7 | 17 |
| South Flint Gravel Inc | South Flint Gravel Inc | Oakland County, MI | Construction sand and gravel | 5 | 15 |
| I-75 Aggregates | I-75 Aggregates | Oakland County, MI | Construction sand and gravel | 10 | 11 |
| Holly Sand and Gravel | Burroughs Materials Corp | Oakland County, MI | Construction sand and gravel | 21 | 8 |
| A a Grange Hall Rd Plant | American Aggregates Of Michigan Inc | Oakland County, MI | Construction sand and gravel | 1 | 8 |
| Ray Road Plant | American Aggregates Of Michigan Inc | Oakland County, MI | Construction sand and gravel | 13 | 7 |
| United Dredging Y105 | United Dredging | Oakland County, MI | Construction sand and gravel | 2 | 4 |
| Portable Finlay | Tri-City Aggregates Inc | Oakland County, MI | Construction sand and gravel | 15 | 1 |
| Portable McCloskey | Tri-City Aggregates Inc | Oakland County, MI | Construction sand and gravel | 12 | 0 |
| Groveland Sand & Gravel | Burroughs Materials Corp | Oakland County, MI | Construction sand and gravel | 0 | 0 |
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 | 10 | 2 | $2,178 | 1 |
| 2023 | 27 | 3 | $4,639 | 3 |
| 2024 | 13 | 1 | $1,911 | 2 |
| 2025 | 24 | 2 | $3,641 | 3 |
| 2026 | 15 | 1 | $1,548 | 2 |
Standards cited most at mines in Oakland County, Michigan
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 56.12004 | Surface metal and nonmetal mines | 10 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 9 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 7 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 3 |
| 30 CFR 47.41 | Hazard communication | 3 |
| 30 CFR 56.20011 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.12068 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.12008 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.18002 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.4104 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 2 |
Injury and illness cases at mines in Oakland County, Michigan
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 9 |
| No lost time, or an occupational illness | 2 |
What the accident reports at mines in Oakland County, Michigan describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Slip or fall of person | 5 |
| Handtools (nonpowered) | 2 |
| Handling of materials | 1 |
| Other | 1 |
| Striking or bumping | 1 |
| Machinery | 1 |
Equipment named in accident reports at mines in Oakland County, Michigan
| Equipment | Reports |
|---|---|
| Hand tools (not powered) | 2 |
| Road grader | 1 |
| Screen | 1 |
| Dredge | 1 |
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.