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Asian Carp Creeping Toward Lake Michigan
West of Chicago and near the city of Joliet, Ill., barges and other small vessels can bypass a dam on the Des Plaines River by using the Brandon Road Lock.


Vessels routinely enter the U.S. Army Corps of Engineers operated-lock through a gate. It's a process that takes about 30 minutes on the whole.

The lock could soon become more than just part of the area's shipping infrastructure: Environmentalists see it as a potential battleground in the effort to keep invasive Asian carp out of the Great Lakes.

A bill currently before Congress could lead to the installation of seismic water guns below the lock to make it harder for the carp and other species to swim upstream. Other tools that utilize sound could also be used to deter the fish, and it's possible to flush clean water into the lock as barges pass as well.



 
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