# MACHINERY
> MSHA accident `220181090016` · 03/21/2018 · Martin Marietta Materials Inc
## Details
- **Degree of injury:** DAYS RESTRICTED ACTIVITY ONLY
- **Classification:** MACHINERY
- **Accident type:** Over-exertion NEC
- **Occupation:** Bulldozer operator, Universal operator, Heavy equipment operator, Operating engineer
- **Activity:** Grader
- **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:** 1.92 years
## Operator
- **Controller:** Martin Marietta Materials Inc
- **Operator:** Martin Marietta Materials Inc
- **Mine:** [0901035](https://api.ai-analytics.org/mine/0901035)
## Narrative

Employee alleges that while operating the motor grader on either 3/21 or 3/22, its seat was too close to the controls, making ee sit ""too straight"" and causing back soreness. EE could not point to a specific time/date or incident that caused the soreness.

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