# MACHINERY
> MSHA accident `220231580017` · 06/06/2023 · Northstar Materials Inc dba Knife River Materials
## Details
- **Degree of injury:** NO DYS AWY FRM WRK,NO RSTR ACT
- **Classification:** MACHINERY
- **Accident type:** Struck by... NEC
- **Occupation:** Bulldozer operator, Universal operator, Heavy equipment operator, Operating engineer
- **Activity:** Handling supplies or material
- **Injury source:** ABRAS STONE,WHEEL GRINDER
- **Nature of injury:** CUT,LACER,PUNCT-OPN WOUND
- **Body part:** UPPER ARM/HUMERUS
- **Days lost:** 0
- **Mine experience:** 9.15 years
## Operator
- **Controller:** Knife River Corporation
- **Operator:** Northstar Materials Inc dba Knife River Materials
- **Mine:** [2103185](https://api.ai-analytics.org/mine/2103185)
## Narrative

Carrying tools and hand held grinder, hit start stop trigger on grinder, grinder cut arm

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