Roblar Quarry LLC Metal/Non-Metal
Roblar Quarry LLC
· Facility
Controlled by
John Barella; Richard D Powell; James Ratto
Petaluma,
Sonoma County,
CA
·
Active
MSHA Mine ID: 0405975
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- Fatalities
- 0
- Total incidents
- 0
- Years on record
- —
- Latest incident
- —
Compliance record
MSHA citations since 2024
4
citations
0
significant & substantial
$596
proposed penalties
$596
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 | 6,512 | 1 | 0 | 153.6 |
| 2025 Q3 | 6,484 | 1 | 0 | 154.2 |
| 2025 Q2 | 6,224 | 0 | 0 | 0.0 |
| 2025 Q1 | 5,971 | 0 | 0 | 0.0 |
| 2024 Q4 | 6,234 | 2 | 0 | 320.8 |
| 2024 Q3 | 6,760 | 0 | 0 | 0.0 |
| 2024 Q2 | 6,609 | 0 | 0 | 0.0 |
| 2024 Q1 | 5,005 | 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.