CSSC Fish Barrier Simulated Rescuer Touch Point Results, Operating Guidance, and Recommendations for Rescuer Safety

The Chicago Sanitary and Ship Canal CSSC has two electric fish barriers in operation to prevent the dispersal of aquatic nuisance species. The experiment was conducted to better understand what would actually occur during a rescue in the electrified waters. An additional purpose was to identify any methods, devices, or operating guidance to prevent potential harm to a rescuer. Actual voltage measurements under different, controlled conditions were taken during transits in the regulated navigation area utilizing an instrumented dummy to simulate a person. Voltage readings and position were continuously monitored. Life ringsthrow lines and non-conducting boat hooks were evaluated for potential use by a rescuer. The voltage measurements and position were processed to identify electric current levels and their likely impact on a person. Significant electrical currents at the barriers make it essential to get a victim away from the barrier before recovery. Under certain operating conditions and with non-conductive apparatus, rescuers can safely provide assistance to a person in the water PIW to move them away from the barriers. The rescuer and victim must be isolated from a vessel metal hull for recovery. Rescue at canal walls away from the barrier may also be feasible.