Gem Hill Mine Site Metal/Non-Metal
CalPortland Cement Company
· Surface
Controlled by
Taiheiyo Cement Corp
Mojave,
Kern County,
CA
·
Intermittent
MSHA Mine ID: 0405976
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- Fatalities
- 0
- Total incidents
- 0
- Years on record
- —
- Latest incident
- —
Compliance record
MSHA citations since 2024
7
citations
2
significant & substantial
$1,449
proposed penalties
$1,449
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 | 0 | 0 | 0 | |
| 2025 Q3 | 0 | 0 | 0 | |
| 2025 Q2 | 0 | 0 | 0 | |
| 2025 Q1 | 1,186 | 0 | 0 | 0.0 |
| 2024 Q4 | 105 | 0 | 0 | 0.0 |
| 2024 Q3 | 101 | 7 | 2 | 69306.9 |
| 2024 Q2 | 1,255 | 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.