Locks and Dam 26 : hearings before the Subcommittee on Water Resources of the Committee on Public Works, United States Senate, Ninety-fourth Congress, second session on S. 1825, a bill to authorize the construction of a lock and dam project on the Mississippi River near Alton, Illinois and Missouri : S. 3425, a bill to provide for comprehensive fish and wildlife studies of the upper Mississippi and Illinois waterways and for other purposes : S. 3506, a bill to authorize the construction of a lock and dam project on the Mississippi River near Alton, Illinois, to revoke authority for twelve-foot channel studies on the upper Mississippi River and its tributaries, and for other purposes, June 17, 22, 24, 28, and July 22, 1976.