# STEPPING OR KNEELING ON OBJECT
> MSHA accident `220050450021` · 12/02/2004 · Monterey Coal Company
## Details
- **Degree of injury:** DAYS AWAY FROM WORK ONLY
- **Classification:** STEPPING OR KNEELING ON OBJECT
- **Accident type:** Struck against stationary object
- **Occupation:** Roof bolter, Rock bolter,  Pinner, Mobile roof support operator (MRS)
- **Activity:** Walking, Running
- **Injury source:** BROKEN ROCK,COAL,ORE,WSTE
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** KNEE/PATELLA
- **Days lost:** 20
- **Mine experience:** 27.21 years
## Operator
- **Controller:** Exxon Mobil Corp
- **Operator:** Monterey Coal Company
- **Mine:** [1100726](https://api.morvs.ai/mine/1100726)
## Narrative

Employee stepped on a rock (measuring 4""x4""x4"") that was in heavily rockdusted area, causing his right knee to twist.  Employee continued working until 2/2/05 when surgery was performed to repair his knee.  He started missing work at that time.

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