Alteration of Unreasonable Obstructive Bridges

Under the provisions of 33 U.S.C. 494, 502, 511, 513, 514, 515 516, 517, 521, 522, 523 and 524 the Commandant of the Coast Guard is authorized to determine if a bridge is an unreasonable obstruction to navigation. If a bridge is determined to be unreasonably obstructive under the Truman-Hobbs Act, then under the provisions of 33 U.S.C. 514 the bridge owner is required to prepare and submit general plans, specifications, and, if necessary geographic location to provide for the alteration of the unreasonably obstructive bridge. These plans and specifications submitted by the bridge owner will assist the Commandant in determining under the provisions of 33 U.S.C. 516 the apportionment of cost between the United States and the bridge owner and under 33 U.S.C. 517 the partial payments to be made by the United States to the bridge owner as the alteration progresses.

The latest form for Alteration of Unreasonable Obstructive Bridges expires 2028-09-30 and can be found here.