Cucamonga Creek Mine Metal/Non-Metal
MRC Rock & Sand LLC
· Surface
Controlled by
Roko Grbic; Mile Grbic
Upland,
San Bernardino County,
CA
·
Active
MSHA Mine ID: 0405929
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- Fatalities
- 0
- Total incidents
- 0
- Years on record
- —
- Latest incident
- —
Compliance record
MSHA citations since 2018
32
citations
10
significant & substantial
$9,211
proposed penalties
$7,726
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 | 1,624 | 0 | 0 | 0.0 |
| 2025 Q3 | 1,061 | 3 | 1 | 2827.5 |
| 2025 Q2 | 1,798 | 0 | 0 | 0.0 |
| 2025 Q1 | 1,995 | 0 | 0 | 0.0 |
| 2024 Q4 | 2,047 | 5 | 2 | 2442.6 |
| 2024 Q3 | 2,492 | 0 | 0 | 0.0 |
| 2024 Q2 | 2,838 | 0 | 0 | 0.0 |
| 2024 Q1 | 2,692 | 3 | 2 | 1114.4 |
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.