Oregon OSHA Health and Safety


February 2015

Safety Notes

Accident Report

  • Incident | Caught in mixing machine
  • Business | Farm supplies
  • Employee | Laborer

Illustration of accident

A laborer working for a company that mixes and bags grass seed was instructed by his line supervisor to hand clean one of two 12-inch diameter augers in a 15-foot tall silo mixer. As he reached into a 6-inch by 3-inch inspection hole to clean an accumulation of dust from the auger blade, a co-worker turned on what he thought was a conveyor control switch. In fact, what the co-worker thought was the conveyor control switch was the switch that turned on the auger – both switches were on the same control panel.

The activated auger amputated the laborer's left arm.

Key accident investigation findings

Applicable standards

1910.147(c)(4)(i): The company did not develop, document, and use procedures for controlling potentially hazardous energy.

1910.147(c)(6)(i): The company did not conduct periodic inspections of energy control procedures at least annually.

1910.147(c)(7)(i)(A): Employees did not receive training in the recognition of hazardous energy sources, the type and magnitude of the energy available in the workplace, and the methods and means necessary for isolating and controlling the energy sources.

1910.147 (c)(7)(i)(B): Employees were not instructed in the purpose and use of the energy control procedures.

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