# MACHINERY
> MSHA accident `220213420018` · 10/11/2021 · United States Steel Corp-Minnesota Ore Operations
## Details
- **Degree of injury:** NO DYS AWY FRM WRK,NO RSTR ACT
- **Classification:** MACHINERY
- **Accident type:** Over-exertion NEC
- **Occupation:** Steel worker, Iron metal worker, Iron worker
- **Activity:** Hand tools (powered)
- **Injury source:** HAND TOOLS,POWERED,NEC
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** UPPER ARM/HUMERUS
- **Days lost:** 0
- **Mine experience:** 26.08 years
## Operator
- **Controller:** USX Corp (United States Steel Corp)
- **Operator:** United States Steel Corp-Minnesota Ore Operations
- **Mine:** [2100282](https://api.ai-analytics.org/mine/2100282)
## Narrative

Employee was drilling a stack of mild steel plates with battery powered portable drill using a pilot point tip type drill bit. The drill bit caught while drilling the hole and twisted causing employee to feel a pop in their bicep area of the right arm. THIS INCIDENT BECAME A RECORDABLE ON 12/6/21 WHEN EMPLOYEE STARTED PHYSICAL THERAPY. 

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