# OTHER
> MSHA accident `220090200123` · 12/09/2008 · United States Steel Corp-Minnesota Ore Operations
## Details
- **Degree of injury:** DAYS AWAY FROM WORK ONLY
- **Classification:** OTHER
- **Accident type:** Over-exertion NEC
- **Occupation:** Maintenance man, Mechanic,  Repair/Serviceman, Boilermaker, Fueler, Tire tech, Field service tech
- **Activity:** Walking, Running
- **Injury source:** FLOOR,WALKING SURF-NOT UG
- **Nature of injury:** UNCLASSIFIED,NOT DETERMED
- **Body part:** KNEE/PATELLA
- **Days lost:** 52
- **Mine experience:** 2.54 years
## Operator
- **Controller:** USX Corp (United States Steel Corp)
- **Operator:** United States Steel Corp-Minnesota Ore Operations
- **Mine:** [2100820](https://api.ai-analytics.org/mine/2100820)
## Narrative

Employee's left knee locked up while walking on a flat surface. Employee had a pre-existing condition on this knee. Safety became aware of physical therapy on 1/14/09.

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