# SLIP OR FALL OF PERSON
> MSHA accident `220260220028` · 01/09/2026 · Thunder Basin Coal Company LLC
## Details
- **Degree of injury:** DAYS AWAY FROM WORK ONLY
- **Classification:** SLIP OR FALL OF PERSON
- **Accident type:** Fall onto or against objects
- **Occupation:** Greaser, Grease man, Oiler, Lube man, Dragline oiler
- **Activity:** Inspect equipment or mine
- **Injury source:** GROUND
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** UPPER ARM/HUMERUS
- **Days lost:** —
- **Mine experience:** 19.62 years
## Operator
- **Controller:** Core Natural Resources Inc
- **Operator:** Thunder Basin Coal Company LLC
- **Mine:** [4800977](https://api.ai-analytics.org/mine/4800977)
## Narrative

Employee tripped in the revolving frame of a dragline catching their fall with their right arm. Employee was diagnosed with a torn bicep tendon on 1/16/2026 and had a procedure on 1/22/2026 to repair the bicep tendon

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