Cahaba River National Wildlife Refuge Expansion Act - Expands the boundaries of the Cahaba River National Wildlife Refuge in Bibb County, Alabama, to include specified lands and waters.
Authorizes the Secretary of the Interior to: (1) revise the boundaries of the Refuge to carry out its purposes or to facilitate the acquistion of property within it; and (2) acquire, subject to the availability of appropriations, such lands and waters to be included in the Refuge.