# HANDLING OF MATERIALS
> MSHA accident `220090090031` · 12/27/2008 · Chevron Mining Inc
## Details
- **Degree of injury:** DAYS AWAY FROM WORK ONLY
- **Classification:** HANDLING OF MATERIALS
- **Accident type:** Over-exertion NEC
- **Occupation:** Underground transportation trainee
- **Activity:** Move non-self-propelled equip
- **Injury source:** DRIL-PRCUSV,HRD ROC,JKHMR
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** KNEE/PATELLA
- **Days lost:** 32
- **Mine experience:** 2.04 years
## Operator
- **Controller:** Chevron Corporation
- **Operator:** Chevron Mining Inc
- **Mine:** [2901267](https://api.ai-analytics.org/mine/2901267)
## Narrative

Employee was installing a rock bolt with a jackleg.  While lifting up on jackleg in order to reposition leg back a few inches, the exertion caused his knee cap to pop out of place.

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