# SLIP OR FALL OF PERSON
> **FATAL** · MSHA accident `220210710003` · 02/25/2021 · Sierra Ready Mix
## Details
- **Degree of injury:** FATALITY
- **Classification:** SLIP OR FALL OF PERSON
- **Accident type:** Fall from headframe, derrick or tower
- **Occupation:** Hydrate plant operator
- **Activity:** Machine maintenance
- **Injury source:** METAL,NEC(PIPE,WIRE,NAIL)
- **Nature of injury:** MULTIPLE INJURIES
- **Body part:** MULTIPLE PARTS (MORE THAN ONE MAJOR)
- **Days lost:** —
- **Mine experience:** 0.58 years
## Operator
- **Controller:** Summit Materials LLC
- **Operator:** Sierra Ready Mix
- **Mine:** [2602594](https://api.ai-analytics.org/mine/2602594)
## Narrative

The employee was last seen on top of the tower and determined to be missing.  The employee was found in a pipe traveling from the cyclone discharge box to the thickener tank. Investigation has revealed that the employee traveled outside the provided safe access to the cyclone discharge box.  It is not yet determined how the employee entered the pipe.  

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