# MACHINERY
> MSHA accident `220113470017` · 12/09/2011 · Excalibar Minerals LLC
## Details
- **Degree of injury:** DAYS RESTRICTED ACTIVITY ONLY
- **Classification:** MACHINERY
- **Accident type:** Over-exertion NEC
- **Occupation:** Belt foreman, Maintenance foreman, Maintenance supervisor
- **Activity:** Hand tools (powered)
- **Injury source:** HAND TOOLS,POWERED,NEC
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** BACK (MUSCLES/SPINE/S-CORD/TAILBONE)
- **Days lost:** 0
- **Mine experience:** 15 years
## Operator
- **Controller:** Newpark Resources Inc
- **Operator:** Excalibar Minerals LLC
- **Mine:** [1601302](https://api.ai-analytics.org/mine/1601302)
## Narrative

Employee was using an impact wrench tightening bolts when the employee felt a muscle pull in his upper back.  The employee has been diagnosed with a sprain/strain of the right thoracic.

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