A bill to authorize the Secretary of the Army to determine that certain waters are not being used for commercial navigation.

Amends the Act of March 3, 1899 to provide that the prohibition against the creation of any obstruction to the navigable waters of the United States shall not apply to any waters of the United States which the Secretary of the Army, acting through the Chief of Engineers, determines are not being used for commerce at the time of such determination and are not likely to be used for such purpose in the foreseeable future.