# SLIP OR FALL OF PERSON
> MSHA accident `220121280016` · 05/02/2012 · Mountain Materials Inc.
## Details
- **Degree of injury:** DAYS RESTRICTED ACTIVITY ONLY
- **Classification:** SLIP OR FALL OF PERSON
- **Accident type:** Fall to the walkway or working surface
- **Occupation:** Maintenance man, Mechanic,  Repair/Serviceman, Boilermaker, Fueler, Tire tech, Field service tech
- **Activity:** Machine maintenance
- **Injury source:** METAL COVERS & GUARDS
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** MULTIPLE PARTS (MORE THAN ONE MAJOR)
- **Days lost:** 0
- **Mine experience:** 0.02 years
## Operator
- **Controller:** CRH PLC
- **Operator:** Mountain Materials Inc.
- **Mine:** [1517312](https://api.ai-analytics.org/mine/1517312)
## Narrative

Just removed crusher base under which was a small rectangular opening through which power cable had run. Hole not noticed; blended in with expanded metal grating. Cleaning up work in preparation to barricade the crusher opening/area. Stepped into hole, slightly larger than a large boot footprint, leg dropped through, straining the knee of the other (left) leg and right shoulder.

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