# Columbia Quarry
> **Metal/Non-metal** mine · MSHA ID `0402297` · Surface · **Abandoned**
## Operator
- **Controller (parent):** Cph Sub Inc & Marine Magnesium Management Company
- **Operator:** Marine Magnesium Company
- **Employees:** —
- **Commodity:** Stone
## Location
- **State:** CA · Tuolumne Co.
## Safety record
- **Total accidents/injuries:** 0
- **Fatalities:** 0
- **Total days lost:** 0
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*Source: [MSHA Open Government Data](https://arlweb.msha.gov/OpenGovernmentData/) · AI Analytics · CC0 1.0*