# MACHINERY
> MSHA accident `220232860017` · 09/18/2023 · Knife River Corporation-Northwest
## Details
- **Degree of injury:** DAYS RESTRICTED ACTIVITY ONLY
- **Classification:** MACHINERY
- **Accident type:** Struck by... NEC
- **Occupation:** Master mechanic, Foreman, Supervisor
- **Activity:** Machine maintenance
- **Injury source:** ABRAS STONE,WHEEL GRINDER
- **Nature of injury:** CUT,LACER,PUNCT-OPN WOUND
- **Body part:** FOREARM/ULNAR/RADIUS
- **Days lost:** 0
- **Mine experience:** 1.48 years
## Operator
- **Controller:** Knife River Corporation
- **Operator:** Knife River Corporation-Northwest
- **Mine:** [3500463](https://api.ai-analytics.org/mine/3500463)
## Narrative

Individual sustained a 5cm laceration to left forearm while performing maintenance with a 4.5"" grinder. Grinding wheel became bound in material while individual was cutting a weld, causing the grinder to accelerate forward into their arm. 

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