# STEPPING OR KNEELING ON OBJECT
> MSHA accident `220033170014` · 11/05/2003 · Rio Tinto Kennecott Copper
## Details
- **Degree of injury:** NO DYS AWY FRM WRK,NO RSTR ACT
- **Classification:** STEPPING OR KNEELING ON OBJECT
- **Accident type:** Struck against stationary object
- **Occupation:** Bulldozer operator, Universal operator, Heavy equipment operator, Operating engineer
- **Activity:** Walking, Running
- **Injury source:** BROKEN ROCK,COAL,ORE,WSTE
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** ANKLE
- **Days lost:** —
- **Mine experience:** 4.17 years
## Operator
- **Controller:** Rio Tinto Group
- **Operator:** Rio Tinto Kennecott Copper
- **Mine:** [4201996](https://api.ai-analytics.org/mine/4201996)
## Narrative

EE PARKED A BOOM TRUCK THEN EXITED AND WAS WALKING TOWARD A PIPE FUSION MACHINE THAT WAS 10' AWAY. AS HE WAS WALKING HE STEPPED ON A ROCK THAT WAS APPROX. 2""=3"" IN SIZE WITH THE INSIDE EDGE OF HIS LEFT FOOT, THE ROCK SHIFTED UNDER HIM CAUSING HIS ANKLE TO ROLL OUTWARD. THE GROUND WAS FLAT, COMPACTED AND HAD NO SNOW.

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