# SLIP OR FALL OF PERSON
> MSHA accident `220170720009` · 03/07/2017 · Montana Limestone Company
## Details
- **Degree of injury:** DAYS AWAY FROM WORK ONLY
- **Classification:** SLIP OR FALL OF PERSON
- **Accident type:** Over-exertion NEC
- **Occupation:** Maintenance man, Mechanic,  Repair/Serviceman, Boilermaker, Fueler, Tire tech, Field service tech
- **Activity:** Machine maintenance
- **Injury source:** STEEL RAIL (ALL KINDS)
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** KNEE/PATELLA
- **Days lost:** 5
- **Mine experience:** 21 years
## Operator
- **Controller:** Basin Electric Power Cooperative
- **Operator:** Montana Limestone Company
- **Mine:** [2402306](https://api.ai-analytics.org/mine/2402306)
## Narrative

The employee was clearing a beam of built up limestone with employee's foot to install expanded metal to prevent pigeons from accessing the plant, when employee twisted and sprained employee's left knee.

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