# Thunder Mountain Quarry
> **Metal/Non-metal** mine · MSHA ID `4501127` · Surface · **Active**
## Operator
- **Controller (parent):** Heidelberg Materials AG
- **Operator:** HM Pacific Northwest, Inc.
- **Employees:** 3
- **Commodity:** Stone
## Location
- **State:** WA · King Co.
- **Coordinates:** 47.228333, -121.975833
## Safety record
- **Total accidents/injuries:** 7
- **Fatalities:** 0
- **Total days lost:** 5
---
*Source: [MSHA Open Government Data](https://arlweb.msha.gov/OpenGovernmentData/) · AI Analytics · CC0 1.0*