# HANDTOOLS (NONPOWERED)
> MSHA accident `220092230017` · 08/01/2009 · RiverStone Group Inc
## Details
- **Degree of injury:** ALL OTHER CASES (INCL 1ST AID)
- **Classification:** HANDTOOLS (NONPOWERED)
- **Accident type:** Over-exertion in wielding or throwing objects
- **Occupation:** Warehouseman, Bagger, Palletizer/Stacker, Store keeper, Packager, Fabricator, Cleaning plant operator
- **Activity:** Hand tools (not powered)
- **Injury source:** AXE,HAMMER,SLEDGE
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** BACK (MUSCLES/SPINE/S-CORD/TAILBONE)
- **Days lost:** 0
- **Mine experience:** 28 years
## Operator
- **Controller:** Riverstone Group
- **Operator:** RiverStone Group Inc
- **Mine:** [1100134](https://api.ai-analytics.org/mine/1100134)
## Narrative

Employee alleges he was breaking up rock out of riprap grizzle and as he was hammering he twisted his lower back.

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