"CHICAGO -- A proposal to prevent the infestation of the Great Lakes by Asian carp faced opposition Sunday when a group organized by Sen. Mark Kirk, R-Ill., gathered on the Chicago River to criticize the plan."

"The $18 billion, 25-year proposal is one of many potential approaches to the carp problem that were offered last week in a report by the Army Corps of Engineers.

It would involve physically cutting off Lake Michigan from the Mississippi River through what's known as hydrologic separation - the use of physical barriers to block aquatic connections between basins."

Kim Geiger reports for the Chicago Tribune January 12, 2014. [2]