# MACHINERY
> MSHA accident `220120330021` · 01/19/2012 · Humphreys Enterprises, Inc.
## Details
- **Degree of injury:** DYS AWY FRM WRK & RESTRCTD ACT
- **Classification:** MACHINERY
- **Accident type:** Struck against a moving object
- **Occupation:** Bulldozer operator, Universal operator, Heavy equipment operator, Operating engineer
- **Activity:** Bulldozer
- **Injury source:** SURFACE MINING MACHINES
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** BACK (MUSCLES/SPINE/S-CORD/TAILBONE)
- **Days lost:** 79
- **Mine experience:** 27.81 years
## Operator
- **Controller:** William D  Humphreys
- **Operator:** Humphreys Enterprises, Inc.
- **Mine:** [4406084](https://api.ai-analytics.org/mine/4406084)
## Narrative

Employee stated that he was pushing out shot rock with his dozer. As he was backing his dozer, he ran over a rock causing the dozer to shift and become unbalanced. This motion jarred the employee resulting in low back pain. Went to doctor on 1/24/12 & became reportable.

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