# MACHINERY
> MSHA accident `220040430027` · 02/04/2004 · United States Steel Corp-Minnesota Ore Operations
## Details
- **Degree of injury:** DYS AWY FRM WRK & RESTRCTD ACT
- **Classification:** MACHINERY
- **Accident type:** Struck by flying object
- **Occupation:** Laborer, Blacksmith, Bull gang, Parts runner, Roustabout, Pick-up man, Pitman
- **Activity:** Hand tools (powered)
- **Injury source:** BROKEN ROCK,COAL,ORE,WSTE
- **Nature of injury:** CONTUSN,BRUISE,INTAC SKIN
- **Body part:** KNEE/PATELLA
- **Days lost:** 2
- **Mine experience:** 2 years
## Operator
- **Controller:** USX Corp (United States Steel Corp)
- **Operator:** United States Steel Corp-Minnesota Ore Operations
- **Mine:** [2100820](https://api.ai-analytics.org/mine/2100820)
## Narrative

INJURED WAS USING AIR POWERED RIVET BUSTER TO REMOVE REFRACTORY FROM EAST BY PASS DAMPER WHEN A FIST-SIZED PIECE OF REFRACTORY BROKE LOOSE FROM WALL AND IMPACTED HIS LEFT LEG ABOVE THE KNEE CAP. EE WAS WORKING IN A 4 FT BY 4 FT CONFINED AREA.

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