# Iowa Grading 2
> **Metal/Non-metal** mine · MSHA ID `1302316` · Surface · **Active**
## Operator
- **Controller (parent):** Martin Marietta Materials Inc
- **Operator:** Martin Marietta Materials, Inc.
- **Employees:** 6
- **Commodity:** SandAndGravel
## Location
- **State:** IA · Polk Co.
- **Coordinates:** 41.918333, -91.523611
## Safety record
- **Total accidents/injuries:** 0
- **Fatalities:** 0
- **Total days lost:** 0
---
*Source: [MSHA Open Government Data](https://arlweb.msha.gov/OpenGovernmentData/) · AI Analytics · CC0 1.0*