# MACHINERY
> MSHA accident `220232690030` · 09/18/2023 · Knife River Corporation-Northwest
## Details
- **Degree of injury:** DAYS AWAY FROM WORK ONLY
- **Classification:** MACHINERY
- **Accident type:** Caught in, under or between a moving and a stationary object
- **Occupation:** Groundman, Yardman
- **Activity:** Handling coal, Rock, Ore
- **Injury source:** MACHINE-MILL,CLEANING PLT
- **Nature of injury:** FRACTURE,CHIP
- **Body part:** LOWER EXTREMITIES, MULTIPLE PARTS
- **Days lost:** 193
- **Mine experience:** 0.23 years
## Operator
- **Controller:** Knife River Corporation
- **Operator:** Knife River Corporation-Northwest
- **Mine:** [3500426](https://api.ai-analytics.org/mine/3500426)
## Narrative

Miner entered HP400 cone crusher after performing lock out/tag out to clear a large rock stuck between cone and mantel.  Miner failed to recognize the stored energy in the cone being suspended by the rock. When dislodging the rock, the weight of the cone came down trapping both feet between the cone and mantel.

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