ZIMMERMAN MINE Metal/Non-Metal
Sloan Materials, LLC
· Surface
Controlled by
Randal Sloan
Leonardtown,
St Marys County,
MD
·
Active
MSHA Mine ID: 1800739
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- Fatalities
- 0
- Total incidents
- 0
- Years on record
- —
- Latest incident
- —
Compliance record
MSHA citations since 2000
113
citations
37
significant & substantial
$23,880
proposed penalties
$23,880
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 | 3,450 | 0 | 0 | 0.0 |
| 2025 Q3 | 3,135 | 0 | 0 | 0.0 |
| 2025 Q2 | 3,255 | 0 | 0 | 0.0 |
| 2025 Q1 | 3,162 | 0 | 0 | 0.0 |
| 2024 Q4 | 2,831 | 0 | 0 | 0.0 |
| 2024 Q3 | 4,080 | 0 | 0 | 0.0 |
| 2024 Q2 | 4,230 | 0 | 0 | 0.0 |
| 2024 Q1 | 3,845 | 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.