Keystone Minerals Metal/Non-Metal
Keystone Minerals LLC
· Surface
Controlled by
Barbara Frieden
Whittemore,
Iosco County,
MI
·
Intermittent
MSHA Mine ID: 2003664
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- Fatalities
- 0
- Total incidents
- 0
- Years on record
- —
- Latest incident
- —
Compliance record
MSHA citations since 2024
9
citations
3
significant & substantial
$1,053
proposed penalties
$1,053
paid to date
Source: MSHA violations data, updated weekly.
Quarterly safety rates
Citations per million employee-hours, as reported to MSHA
| Quarter | Hours worked | Citations | S&S | Per 1M hrs |
|---|---|---|---|---|
| 2025 Q4 | 1,583 | 0 | 0 | 0.0 |
| 2025 Q3 | 1,616 | 3 | 1 | 1856.4 |
| 2025 Q2 | 2,228 | 0 | 0 | 0.0 |
| 2025 Q1 | 1,868 | 0 | 0 | 0.0 |
| 2024 Q4 | 3,146 | 0 | 0 | 0.0 |
| 2024 Q3 | 2,629 | 1 | 0 | 380.4 |
| 2024 Q2 | 3,263 | 0 | 0 | 0.0 |
| 2024 Q1 | 1,586 | 0 | 0 | 0.0 |
Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.
No reportable incidents on file.
MSHA has no recorded reportable accidents for this mine in the current dataset. New reports appear here within a week of being filed.