# SLIP OR FALL OF PERSON
> MSHA accident `220212600015` · 09/13/2021 · Martin Marietta Materials Inc
## Details
- **Degree of injury:** DAYS RESTRICTED ACTIVITY ONLY
- **Classification:** SLIP OR FALL OF PERSON
- **Accident type:** Caught in, under or between NEC
- **Occupation:** Laborer, Blacksmith, Bull gang, Parts runner, Roustabout, Pick-up man, Pitman
- **Activity:** Machine maintenance
- **Injury source:** CONVEYORS,NEC
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** KNEE/PATELLA
- **Days lost:** 0
- **Mine experience:** 0.81 years
## Operator
- **Controller:** Martin Marietta Materials Inc
- **Operator:** Martin Marietta Materials Inc
- **Mine:** [4800004](https://api.ai-analytics.org/mine/4800004)
## Narrative

The injured employee was performing maintenance on a bearing for the P-1 conveyor when right foot slipped into a gap between the conveyor frame and the concrete retaining wall. The injured employee's body turned to one side causing a twisting injury to the right knee. 

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