# Carderock Quarries
> **Metal/Non-metal** mine · MSHA ID `1800404` · Surface · **Active**
## Operator
- **Controller (parent):** Porto Family Dynasty Trust 1; Brian A Porto et  al
- **Operator:** Tri-State Stone & Building Supply Inc.
- **Employees:** 22
- **Commodity:** Stone
## Location
- **State:** MD · Montgomery Co.
- **Coordinates:** 39.045833, -76.641389
## Safety record
- **Total accidents/injuries:** 7
- **Fatalities:** 0
- **Total days lost:** 305
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*Source: [MSHA Open Government Data](https://arlweb.msha.gov/OpenGovernmentData/) · AI Analytics · CC0 1.0*