# SLIP OR FALL OF PERSON
> MSHA accident `220240440017` · 01/29/2024 · The National Lime & Stone 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:** GROUND
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** KNEE/PATELLA
- **Days lost:** 90
- **Mine experience:** 8.48 years
## Operator
- **Controller:** National Lime & Stone Co.
- **Operator:** The National Lime & Stone Company
- **Mine:** [3300120](https://api.ai-analytics.org/mine/3300120)
## Narrative

Employee was doing maintenance in a primary crusher hopper. EE was installing new bolts in the structure under the hopper when EE stepped in a hole and twisted right knee.

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