# SLIP OR FALL OF PERSON
> MSHA accident `220120040024` · 10/13/2011 · Materion Natural Resources
## Details
- **Degree of injury:** DAYS AWAY FROM WORK ONLY
- **Classification:** SLIP OR FALL OF PERSON
- **Accident type:** Caught in, under or between NEC
- **Occupation:** Maintenance man, Mechanic,  Repair/Serviceman, Boilermaker, Fueler, Tire tech, Field service tech
- **Activity:** Walking, Running
- **Injury source:** METAL,NEC(PIPE,WIRE,NAIL)
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** KNEE/PATELLA
- **Days lost:** 44
- **Mine experience:** 33.23 years
## Operator
- **Controller:** Materion Corporation
- **Operator:** Materion Natural Resources
- **Mine:** [4200706](https://api.ai-analytics.org/mine/4200706)
## Narrative

The employee was on the lower cat walk at the thickener area to repair an auto valve. When stepping across the pipes to the valve, his foot slipped between the pipes causing his right knee to hyperextend, spraining the knee.  Incident went unreported until 12/23/2011

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