Blue Moon Underground Mine Metal/Non-Metal
Small Mine Development
· Underground
Controlled by
Keith Jones
Hornitos,
Mariposa County,
CA
·
Active
MSHA Mine ID: 0405990
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- Fatalities
- 0
- Total incidents
- 0
- Years on record
- —
- Latest incident
- —
Compliance record
MSHA citations since 2025
5
citations
0
significant & substantial
$604
proposed penalties
$604
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 | 7,113 | 1 | 0 | 140.6 |
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.