# MACHINERY
> MSHA accident `220110280023` · 01/20/2010 · AMFIRE Mining Company LLC
## Details
- **Degree of injury:** DYS AWY FRM WRK & RESTRCTD ACT
- **Classification:** MACHINERY
- **Accident type:** Over-exertion NEC
- **Occupation:** Laborer, Bull gang,  Parts runner, Roustabout, Roof trimmer/scaler
- **Activity:** Roof bolter, Inserting bolt
- **Injury source:** MINE FLOOR,BOTTOM,FOOTWAL
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** KNEE/PATELLA
- **Days lost:** 25
- **Mine experience:** 5 years
## Operator
- **Controller:** Alpha Natural Resources, Inc.
- **Operator:** AMFIRE Mining Company LLC
- **Mine:** [3608850](https://api.ai-analytics.org/mine/3608850)
## Narrative

While installing roof bolt, employee twisted his right knee. He has worked full duty until 1/18/2011 when he re-aggravated the injury. Employee is working modified duty effective 1/25/2011 per doctor's orders.

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