# HANDLING OF MATERIALS
> MSHA accident `220262110014` · 07/23/2026 · Freeport-McMoRan Sierrita Ops.
## Details
- **Degree of injury:** DAYS AWAY FROM WORK ONLY
- **Classification:** HANDLING OF MATERIALS
- **Accident type:** Over-exertion NEC
- **Occupation:** Ball/Rod/Pebble/Hand/Limestone/Dry mill operator, Roller operator
- **Activity:** Handling supplies or material
- **Injury source:** BLOCKING
- **Nature of injury:** UNCLASSIFIED,NOT DETERMED
- **Body part:** SHOULDERS (COLLARBONE/CLAVICLE/SCAPULA)
- **Days lost:** —
- **Mine experience:** 1.98 years
## Operator
- **Controller:** Freeport-McMoRan Inc
- **Operator:** Freeport-McMoRan Sierrita Ops.
- **Mine:** [0200144](https://api.morvs.ai/mine/0200144)
## Narrative

Employee was opening a flush water ball valve to the tails launder in the mill basement. The valve was difficult to operate, so the employee used a wheel chock to strike the valve in an attempt to open it. During the task, the employee sustained an injury to the left shoulder.

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