DNR Recommends Asian Carp Barrier At Minneapolis A state-commissioned study says a barrier using sound, bubbles and lights would be the most viable option from deterring Asian carp from moving up the Mississippi River from downtown Minneapolis.
Army Corps: More Voltage Needed For Asian Carp BarrierThe U.S. Army Corps of Engineers says it might need to increase the voltage on the electric barrier built to keep Asian carp out of the Great Lakes.

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