From the U.S. Code Online via GPO Access
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[Laws in effect as of January 3, 2006]
[CITE: 33USC513]

 
                TITLE 33--NAVIGATION AND NAVIGABLE WATERS
 
                CHAPTER 11--BRIDGES OVER NAVIGABLE WATERS
 
                  SUBCHAPTER II--ALTERATION OF BRIDGES
 
Sec. 513. Notice, hearings, and findings

    Whenever any bridge shall, in the opinion of the Secretary, at any 
time unreasonably obstruct such navigation, it shall be the duty of the 
Secretary, after notice to interested parties, to hold a hearing at 
which the bridge owner, those interested in water navigation thereunder 
or therethrough, those interested in either railroad or highway traffic 
thereover, and any other party or parties in interest shall have full 
opportunity to offer evidence and be heard as to whether any alteration 
of such bridge is needed, and if so what alterations are needed, having 
due regard to the necessity of free and unobstructed water navigation 
and to the necessities of the rail or highway traffic. If, upon such 
hearing, the Secretary determines that any alterations of such bridge 
are necessary in order to render navigation through or under it 
reasonably free, easy, and unobstructed, having due regard also for the 
necessities of rail or highway traffic thereover, he shall so find and 
shall issue and cause to be served upon interested parties an order 
requiring such alterations of such bridge as he finds to be reasonably 
necessary for the purposes of navigation.

(June 21, 1940, ch. 409, Sec. 3, 54 Stat. 498.)