A bill to declare the Port of Houston Authority Bridge over Greens Bayou, Texas, to be for all purposes a "lawful bridge" as defined in "An Act to provide for the alteration of certain bridges over navigable waters of the United States, for the apportionment of the cost of such alterations between the United States and the owners of such bridges, and for other purposes" approved June 21, 1940 (33 U.S.C. 511 et seq.).

Declares the Port of Houston Authority Bridge over Greens Bayou, Texas, to be for all purposes a "lawful bridge" as defined in a specified Act which provides for the alteration of certain bridges over navigable waters of the United States and for the apportionment of the cost of such alterations between the United States and the owners of such bridges.

Authorizes the Secretary of Transportation to reimburse the bridge owner for work done prior to the date of enactment of this Act which, if done after enactment of this Act, would have been the responsibility of the United States.