# STEPPING OR KNEELING ON OBJECT
> MSHA accident `220062750023` · 09/28/2006 · Freeport-McMoRan Sierrita Ops.
## Details
- **Degree of injury:** DAYS AWAY FROM WORK ONLY
- **Classification:** STEPPING OR KNEELING ON OBJECT
- **Accident type:** Struck against stationary object
- **Occupation:** Welder (shop)
- **Activity:** Walking, Running
- **Injury source:** BROKEN ROCK,COAL,ORE,WSTE
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** KNEE/PATELLA
- **Days lost:** 54
- **Mine experience:** 1 years
## Operator
- **Controller:** Phelps Dodge Corp
- **Operator:** Freeport-McMoRan Sierrita Ops.
- **Mine:** [0200144](https://api.ai-analytics.org/mine/0200144)
## Narrative

Employee came down off of the stacker ramp and while walking towards the work truck he slipped on a rock that was lying on the ground near the stacker belt and sprained his knee.

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