# SLIP OR FALL OF PERSON
> MSHA accident `220142590016` · 09/09/2014 · Bridger Coal Company 
## Details
- **Degree of injury:** DAYS AWAY FROM WORK ONLY
- **Classification:** SLIP OR FALL OF PERSON
- **Accident type:** Over-exertion NEC
- **Occupation:** Laborer, Bull gang, Faceman, Parts runner, Roustabout, Roof trimmer/scaler
- **Activity:** Machine maintenance
- **Injury source:** MINE FLOOR,BOTTOM,FOOTWAL
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** ANKLE
- **Days lost:** 4
- **Mine experience:** 1.06 years
## Operator
- **Controller:** MidAmerican Energy Holdings Company; IDACORP
- **Operator:** Bridger Coal Company 
- **Mine:** [4801646](https://api.ai-analytics.org/mine/4801646)
## Narrative

Contractor was engaged on changing out 90 degree elbow on ventilation tubing, a ""T"" would replace the 90 degree elbow. He was using the removed elbow to stand on while installing the ""T"". He stepped off of the 90 degree elbow and twisted his ankle.

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