# SLIP OR FALL OF PERSON
> MSHA accident `220111650009` · 05/12/2011 · Knife River Corporation-Northwest
## Details
- **Degree of injury:** DAYS RESTRICTED ACTIVITY ONLY
- **Classification:** SLIP OR FALL OF PERSON
- **Accident type:** Fall to the walkway or working surface
- **Occupation:** Laborer, Blacksmith, Bull gang, Parts runner, Roustabout, Pick-up man, Pitman
- **Activity:** Machine maintenance
- **Injury source:** SCAFFOLDS,STAGING,ETC
- **Nature of injury:** CUT,LACER,PUNCT-OPN WOUND
- **Body part:** LOWER LEG/TIBIA/FIBULA
- **Days lost:** 0
- **Mine experience:** 3 years
## Operator
- **Controller:** MDU Resources Group Inc
- **Operator:** Knife River Corporation-Northwest
- **Mine:** [3502968](https://api.ai-analytics.org/mine/3502968)
## Narrative

Employee was replacing a 10"" diameter pipe that went through the catwalk (expanded metal) that he was working on. After he removed the pipe and co-workers were raising the new pipe, the employee turned to retrieve an air hose  and his left leg fell into the 10"" hole in the catwalk where the old pipe used to be.

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