Great Lakes Asian Carp Barrier Act

Great Lakes Asian Carp Barrier Act - Requires the Chicago Sanitary and Ship Canal Dispersal Barrier Project constructed as a demonstration project under the Nonindigenous Aquatic Nuisance Prevention and Control Act of 1990 (Barrier I) and the related project authorized under the District of Columbia Appropriations Act, 2005 (Barrier II) to be considered to constitute a single project.

Directs the Secretary of the Army, at federal expense, to: (1) upgrade and make permanent Barrier I, construct Barrier II, operate and maintain Barriers I and II as a system, conduct a study of a range of options and technologies for reducing impacts of hazards that may reduce the efficacy of the Barriers, and provide to each state a credit in an amount equal to that of funds contributed by the state toward Barrier II (which the state may apply to any cost-sharing responsibility for an existing or future federal project with the Corps of Engineers); and (2) conduct a feasibility study of the range of options and technologies to prevent the spread of aquatic nuisance species between the Great Lakes and Mississippi River basins through the Chicago Sanitary and Ship Canal and other aquatic pathways.

Changes the authorization for Barrier II to such sums as may be necessary.