# MACHINERY
> MSHA accident `220220690011` · 03/04/2022 · R.E. Pierson Materials Corp
## Details
- **Degree of injury:** DAYS RESTRICTED ACTIVITY ONLY
- **Classification:** MACHINERY
- **Accident type:** Struck against a moving object
- **Occupation:** Bulldozer operator, Universal operator, Heavy equipment operator, Operating engineer
- **Activity:** Power shovel, Dragline
- **Injury source:** SURFACE MINING MACHINES
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** BACK (MUSCLES/SPINE/S-CORD/TAILBONE)
- **Days lost:** 0
- **Mine experience:** 6 years
## Operator
- **Controller:** Richard E  Pierson
- **Operator:** R.E. Pierson Materials Corp
- **Mine:** [3600111](https://api.ai-analytics.org/mine/3600111)
## Narrative

349F excavator was trying to dig a big rock out of pile against west wall, operator was trying to find the top edge of rock to pull rock from pile. The teeth slipped off the rock which caused machine to jar hard against the pile. The operator didn't notice any discomfort until operator got out of machine at end of day and stood up.      

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