# HANDLING OF MATERIALS
> MSHA accident `220102440030` · 08/25/2010 · Knik Construction Co. , Inc.
## Details
- **Degree of injury:** NO DYS AWY FRM WRK,NO RSTR ACT
- **Classification:** HANDLING OF MATERIALS
- **Accident type:** Over-exertion in lifting objects
- **Occupation:** Bulldozer operator, Universal operator, Heavy equipment operator, Operating engineer
- **Activity:** Machine maintenance
- **Injury source:** METAL COVERS & GUARDS
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** BACK (MUSCLES/SPINE/S-CORD/TAILBONE)
- **Days lost:** 0
- **Mine experience:** 0.12 years
## Operator
- **Controller:** Lynden Inc
- **Operator:** Knik Construction Co. , Inc.
- **Mine:** [5001765](https://api.ai-analytics.org/mine/5001765)
## Narrative

Employee was changing out a screen in the rock crusher when he lifted the screen over his head.  He developed a back strain.

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