Key Takeaway
Keystone Minerals is a intermittent surface mine producing Nonmetal, located in Whittemore, Iosco County, MI. It has 4 violations on record (1 S&S) and $600 in proposed penalties. Operated by Keystone Minerals LLC.
Keystone Minerals
Operator: Keystone Minerals LLC
Controller: Barbara Frieden
Location: Whittemore, Iosco County, MI
Employees: 2
Recent Violations
View all 4 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 08/13/2025 | 50.30(a) | Non-S&S | LowNegligence | $151 |
| 08/13/2025 | 56.12028 | S&S | LowNegligence | $151 |
| 08/12/2025 | 56.14101(a)(2) | Non-S&S | LowNegligence | $151 |
| 07/10/2024 | 56.12004 | Non-S&S | LowNegligence | $147 |
Inspections
View all 2 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 08/12/2025 | 08/13/2025 | 28.00 | 1 |
| 07/08/2024 | 07/12/2024 | 7.25 | 1 |
Mine Details
Related Mines
Frequently Asked Questions
How many MSHA violations does Keystone Minerals have?
Keystone Minerals has 4 MSHA violations on record, of which 1 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $600.
What type of mine is Keystone Minerals?
Keystone Minerals is a Surface mine producing Nonmetal, located in Whittemore, Iosco County, MI. It currently has 2 employees.
Has anyone been injured or killed at Keystone Minerals?
According to MSHA records, Keystone Minerals has 0 reported accident/injury records and 0 fatalities on file.
Who operates Keystone Minerals?
Keystone Minerals is operated by Keystone Minerals LLC and controlled by Barbara Frieden. MSHA Mine ID: 2003664.