# MACHINERY
> MSHA accident `220102040010` · 07/08/2010 · Bridger Coal Company 
## Details
- **Degree of injury:** DYS AWY FRM WRK & RESTRCTD ACT
- **Classification:** MACHINERY
- **Accident type:** Over-exertion NEC
- **Occupation:** Apprentice, Trainee
- **Activity:** Roof bolter, Inserting bolt
- **Injury source:** UNDERGRD MINING MACHINES
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** BACK (MUSCLES/SPINE/S-CORD/TAILBONE)
- **Days lost:** 72
- **Mine experience:** 3.92 years
## Operator
- **Controller:** MidAmerican Energy Holdings Company; IDACORP
- **Operator:** Bridger Coal Company 
- **Mine:** [4801646](https://api.ai-analytics.org/mine/4801646)
## Narrative

While bolting ribs, employee twisted his back as he was installing a truss bolt. Medical attention was not sought until July 19, 2010 and at that time he was placed on restricted duty.

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