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Print

Asian carp barrier reset at higher level

December 13, 2011 at 04:57 PM

Prairie State Outdoors

CHICAGO — The U.S. Army Corps of Engineers announced they will return the operating parameters of the electric barrier to the higher level established in October.

The barrier had been temporarily reset to pre-October settings while the Corps investigated possible interference with railroad signals adjacent to the barrier site.

Engineers at the barrier site were able to identify a piece of equipment that was contributing to the issue.

The equipment has been reconfigured to avoid interference with the railroad signals.

The operating parameters of 2.3 volts, 30 hertz and 2.5 milliseconds went into effect on Nov. 29.

The Corps said it will continue to work with the U.S. Coast Guard and other members of the Asian Carp Regional Coordinating Committee to ensure both safe and effective operation of the electric barrier system.

Very small Asian carp, those that experts feared could pass through the barrier when current was set at lower levels, have not been observed near the barrier.

Expanded use of ultrasonic telemetry to determine fish behavior near the electric fields has shown no tagged fish have crossed any of the electric barriers in the upstream direction.

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