# El Cajon Quarry
> **Metal/Non-metal** mine · MSHA ID `0400133` · Surface · **Active**
## Operator
- **Controller (parent):** RRM Development Corporation; Mitsubishi Corp
- **Operator:** Robertson's Ready Mix Ltd
- **Employees:** 5
- **Commodity:** Stone
## Location
- **State:** CA · San Diego Co.
- **Coordinates:** 32.764722, -116.89
## Safety record
- **Total accidents/injuries:** 18
- **Fatalities:** 0
- **Total days lost:** 71
---
*Source: [MSHA Open Government Data](https://arlweb.msha.gov/OpenGovernmentData/) · AI Analytics · CC0 1.0*