# HANDLING OF MATERIALS
> MSHA accident `220070530018` · 02/15/2007 ·  Knife River Construction
## Details
- **Degree of injury:** DAYS RESTRICTED ACTIVITY ONLY
- **Classification:** HANDLING OF MATERIALS
- **Accident type:** Caught in, under or between a moving and a stationary object
- **Occupation:** Maintenance man, Mechanic,  Repair/Serviceman, Boilermaker, Fueler, Tire tech, Field service tech
- **Activity:** Machine maintenance
- **Injury source:** METAL COVERS & GUARDS
- **Nature of injury:** CRUSHING
- **Body part:** FINGER(S)/THUMB
- **Days lost:** 0
- **Mine experience:** 7 years
## Operator
- **Controller:** MDU Resources Group Inc
- **Operator:**  Knife River Construction
- **Mine:** [0405459](https://api.ai-analytics.org/mine/0405459)
## Narrative

Two men were replacing bottom seal ring on cone crusher. The seal ring slipped off retaining lip while installing bolts mashing man's left hand 2nd finger between ring and main shaft.

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