Sierra Minerals, LLC · Struck by... (Not Elsewhere Classified)
Employee was trimming timber with an electric chainsaw. The chainsaw became bound up and kicked back. The employee was struck with the chain above left elbow.
Colombo Mine Metal/Non-Metal
Sierra Minerals, LLC
· Underground
Controlled by
Sierra Resources, LLC; Elli M Mills
Sierra City,
Sierra County,
CA
·
Abandoned
MSHA Mine ID: 0405951
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- Fatalities
- 0
- Total incidents
- 1
- Years on record
- 2021
- Latest incident
- Apr 2021
Compliance record
MSHA citations since 2021
12
citations
0
significant & substantial
$1,500
proposed penalties
$1,500
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 |
|---|---|---|---|---|
| 2022 Q4 | 1,950 | 0 | 0 | 0.0 |
| 2022 Q3 | 2,416 | 0 | 0 | 0.0 |
| 2022 Q2 | 2,676 | 0 | 0 | 0.0 |
| 2022 Q1 | 4,533 | 0 | 0 | 0.0 |
| 2021 Q4 | 4,223 | 12 | 0 | 2841.6 |
| 2021 Q3 | 4,808 | 0 | 0 | 0.0 |
| 2021 Q2 | 3,590 | 0 | 0 | 0.0 |
| 2021 Q1 | 1,972 | 0 | 0 | 0.0 |
Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.
No fatalities recorded at this mine.