# HANDLING OF MATERIALS
> MSHA accident `220211320012` · 04/26/2021 · Trapper Mining Inc
## Details
- **Degree of injury:** DYS AWY FRM WRK & RESTRCTD ACT
- **Classification:** HANDLING OF MATERIALS
- **Accident type:** Over-exertion NEC
- **Occupation:** Greaser, Grease man, Oiler, Lube man, Dragline oiler
- **Activity:** Getting on or off equipment
- **Injury source:** SURFACE MINING MACHINES
- **Nature of injury:** UNCLASSIFIED,NOT DETERMED
- **Body part:** KNEE/PATELLA
- **Days lost:** 57
- **Mine experience:** 24.19 years
## Operator
- **Controller:** MidAmerican Energy Holdings Company; Platte River Power Authority; Salt 
- **Operator:** Trapper Mining Inc
- **Mine:** [0502838](https://api.ai-analytics.org/mine/0502838)
## Narrative

Employee reported while climbing on a dozer, employee experienced pain in knee.  MRI revealed medial extrusion of the body of the medial meniscus and a tear of the root of the medial meniscus.  These conditions are associated with osteoarthritis and degenerative changes.

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