# MACHINERY
> MSHA accident `220231730022` · 06/13/2023 · Twin State Mining, Inc.
## Details
- **Degree of injury:** DAYS AWAY FROM WORK ONLY
- **Classification:** MACHINERY
- **Accident type:** Caught in, under or between a moving and a stationary object
- **Occupation:** Roof bolter, Rock bolter,  Pinner, Mobile roof support operator (MRS)
- **Activity:** Roof bolter, Tramming
- **Injury source:** UNDERGRD MINING MACHINES
- **Nature of injury:** CONTUSN,BRUISE,INTAC SKIN
- **Body part:** ARM,NEC
- **Days lost:** 18
- **Mine experience:** 2.46 years
## Operator
- **Controller:** Cleveland-Cliffs Inc
- **Operator:** Twin State Mining, Inc.
- **Mine:** [4609261](https://api.ai-analytics.org/mine/4609261)
## Narrative

An employee was tramming the roof bolting machine from the operator's deck, when the machine slid on a rock pinning EE's arm between the machine and the rib.

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*Source: [MSHA Open Government Data](https://arlweb.msha.gov/OpenGovernmentData/) · AI Analytics · CC0 1.0*