When, after March 23, 1906, authority is granted by Congress to any persons to construct and maintain a bridge across or over any of the navigable waters of the United States, such bridge shall not be built or commenced until the plans and specifications for its construction, together with such drawings of the proposed construction and such map of the proposed location as may be required for a full understanding of the subject, have been submitted to the Secretary of the department in which the Coast Guard is operating for the Secretary’s approval, nor until the Secretary shall have approved such plans and specifications and the location of such bridge and accessory works; and when the plans for any bridge to be constructed under the provisions of sections 491 to 494 and 495 to 498 of this title, have been approved by the Secretary it shall not be lawful to deviate from such plans, either before or after completion of the structure, unless the modification of such plans has previously been submitted to and received the approval of the Secretary. This section shall not apply to any bridge over waters which are not subject to the ebb and flow of the tide and which are not used and are not susceptible to use in their natural condition or by reasonable improvement as a means to transport interstate or foreign commerce.

Any bridge built in accordance with the provisions of sections 491 to 494 and 495 to 498 of this title, shall be a lawful structure and shall be recognized and known as a post route, upon which no higher charge shall be made for the transmission over the same of the mails, the troops, and the munitions of war of the United States than the rate per mile paid for the transportation over any railroad, street railway, or public highway leading to said bridge; and the United States shall have the right to construct, maintain, and repair, without any charge therefor, telegraph and telephone lines across and upon said bridge and its approaches; and equal privileges in the use of said bridge and its approaches shall be granted to all telegraph and telephone companies.

All railroad companies desiring the use of any railroad bridge built in accordance with the provisions of sections 491 to 494 and 495 to 498 of this title, shall be entitled to equal rights and privileges relative to the passage of railway trains or cars over the same and over the approaches thereto upon payment of a reasonable compensation for such use; and in case of any disagreement between the parties in regard to the terms of such use or the sums to be paid all matters at issue shall be determined by the Secretary of Transportation upon hearing the allegations and proofs submitted to him.

No bridge erected or maintained under the provisions of sections 491 to 494 and 495 to 498 of this title, shall at any time unreasonably obstruct the free navigation of the waters over which it is constructed, and if any bridge erected in accordance with the provisions of said sections, shall, in the opinion of the Secretary of the department in which the Coast Guard is operating at any time unreasonably obstruct such navigation, either on account of insufficient height, width of span, or otherwise, or if there be difficulty in passing the draw opening or the drawspan of such bridge by rafts, steamboats, or other water craft, it shall be the duty of the Secretary of the department in which the Coast Guard is operating after giving the parties interested reasonable opportunity to be heard, to notify the persons owning or controlling such bridge to so alter the same as to render navigation through or under it reasonably free, easy, and unobstructed, stating in such notice the changes required to be made, and prescribing in each case a reasonable time in which to make such changes, and if at the end of the time so specified the changes so required have not been made, the persons owning or controlling such bridge shall be deemed guilty of a violation of said sections; and all such alterations shall be made and all such obstructions shall be removed at the expense of the persons owning or operating said bridge. The persons owning or operating any such bridge shall maintain, at their own expense, such lights and other signals thereon as the Commandant of the Coast Guard shall prescribe. If the bridge shall be constructed with a draw, then the draw shall be opened promptly by the persons owning or operating such bridge upon reasonable signal for the passage of boats and other water craft.

The Commandant of the Coast Guard shall submit to the Committee on Commerce, Science, and Transportation of the Senate and the Committee on Transportation and Infrastructure of the House of Representatives a comprehensive study on the construction or alteration of any bridge, drawbridge, or causeway over the navigable waters of the United States with a channel depth of 25 feet or greater that may impede or obstruct future navigation to or from port facilities and for which a permit under the Act of March 23, 1906 (33 U.S.C. 491 et seq.), popularly known as the Bridge Act of 1906, was requested during the period beginning on January 1, 2006, and ending on August 3, 2011.

Whenever Congress shall after March 23, 1906, by law authorize the construction of any bridge over or across any of the navigable waters of the United States, and no time for the commencement and completion of such bridge is named in said Act, the authority thereby granted shall cease and be null and void unless the actual construction of the bridge authorized in such Act be commenced within one year and completed within three years from the date of the passage of such Act.

The word “persons” as used in sections 491 to 494 and 495 to 498 of this title, shall be construed to import both the singular and the plural, as the case demands, and shall include municipalities, quasi-municipal corporations, corporations, companies, and associations.

The right to alter, amend, or repeal sections 491 to 494 and 495 to 498 of this title, is expressly reserved as to any and all bridges which may be built in accordance with the provisions of said sections, and the United States shall incur no liability for the alteration, amendment, or repeal thereof to the owner or owners or any other persons interested in any bridge which shall have been constructed in accordance with its provisions.

Whenever complaint shall be made to the Secretary of the Army that by reason of the placing in any navigable waters of the United States of any bridge pier or abutment, the current of such waters has been so deflected from its natural course as to cause by producing caving of banks or otherwise serious damage or danger to property, it shall be his duty to make inquiry, and if it shall be ascertained that the complaint is well founded, he shall cause the owners or persons operating such bridge to repair such damage or prevent such danger to property by such means as he shall indicate and within such time as he may name, and in default thereof the owners or persons operating such bridge shall be liable in any court of competent jurisdiction to the persons injured in a sum double the amount of said injury: Provided, however, That nothing herein contained shall be construed so as to affect any rights of action which may have existed prior to August 11, 1888.

Tolls for passage or transit over any bridge constructed under the authority of the Act of March 23, 1906, commonly known as the “Bridge Act of 1906”, the General Bridge Act of 1946 [33 U.S.C. 525 et seq.], and the International Bridge Act of 1972 [33 U.S.C. 535 et seq.] shall be just and reasonable.