# MACHINERY
> MSHA accident `220220030016` · 12/28/2021 · Arcosa Aggregates, Inc.
## Details
- **Degree of injury:** DAYS RESTRICTED ACTIVITY ONLY
- **Classification:** MACHINERY
- **Accident type:** Struck against a moving object
- **Occupation:** Crane operator, Mobile equipment operator (MEO), Dragline operator, Dropball operator, Rigger
- **Activity:** Power shovel, Dragline
- **Injury source:** SURFACE MINING MACHINES
- **Nature of injury:** UNCLASSIFIED,NOT DETERMED
- **Body part:** BACK (MUSCLES/SPINE/S-CORD/TAILBONE)
- **Days lost:** 0
- **Mine experience:** 4.98 years
## Operator
- **Controller:** Arcosa, Inc
- **Operator:** Arcosa Aggregates, Inc.
- **Mine:** [4104553](https://api.ai-analytics.org/mine/4104553)
## Narrative

Employee was reaching down between legs to reach the lever to adjust the seat. As the employee lifted the lever the seat slid back causing employee some pain in lower back area.

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