432 FIFTY-SECOND CONGRESS. Sess. II. Ch. 66. 1893. the free navigation of said river, by reason of the construction of said bridge, the cause may be tried before the circuit court of the United · States in and for any district in whose jurisdiction any portion of said mama mags. obstruction or bridge may be. Said bridge shall be constructed to provide for the passage of railroad trains. new openings. Sec. 2. That said bridge shall be provided with one or more draw openings, each having not less than one hundred feet clear channel way at low water, and in addition to said draw openings one or more fixed channel spans, each having not less than one hundred·feet clear channcl way; and every part of the superstructure of said bridge shall give a clear headroom of not less than ten feet above extreme known high- 1*******- water mark: Provided, That all spans shall be so located as to afford Sr¤•¤¤ the greatest possible accommodation to the river traffic, and a draw opening shall, if practicable, be located next or near shore: Provided Hmlsrnnn. also, That if the physical characteristics of the locality so require, and the interest of navigation be not injured thereby, the lengths of the fixed spans or the number of draw openings may be reduced: Provided Draw sinus. also, That for any two adjacent draw openings of one hundred feet each, one draw opening of two hundred feet or more maybe substituted if in the o inion of the Secretary of War the interest of navigation be not injured thereby. · 0r¤¤¤¤s ¢¤v- Sec. 3. That all draw spans authorized by this act shall be operated by steam or other reliable power, and shall be opened promptly upon reasonable signal for the passage of boats, except when trains are passing over said span or spans; but in no case shall unnecessary delay occur in opening said draw after the passage of trains; and also that in case the opening of a draw is delayed by reason of the passing of a train after the signal has been given from a boat ready to pass through, the draw shall be opened for the passage of such boat before another train is allowed to pass overdthe said span or spans; nor shall there be _any unnecessary delay in the passage of trains over the bridge. Phu- S1:o.4.Thatallpiersshallhebuiltasnearasmaybeparallelwith · __ the current of the river at that stage of water which IB most important · for navigation, and the bridge itself shall be built as nearly as may be at right angles thereto; and that riprapping or other protection for imperfect foundations which will lessen the required water way shall not be permitted; and also that piers which willproduce cross currents or bars dangerous to navigation shall not be constructed; and if after construction any piers or accessory works are found to produce the above-mentioned edects, or if any riprapping or other protection prohibited by this section is found to exist, the nuisance shall be abated or corrected under the direction of the Secretary of War, at the experhse of the company or persons owning, controlling, or operating said ri ge.
- PP'°•°*'°* Sec. 5. That the approachesto said bridge shall be so designed and
constructed as not to interfere with the free discharge of said river in seasons of flood; and any encroachment on the high-water cross section by piers, solid embankments, or otherwise, which will result in unduly accelerating the high-water current at the site of the bridge shall not be allowed. MM *0 ¤¤**s¤¤··¤· Sec. 6. That any corporation, company, or persons, owning, controlling, or operating the bridge built under the authority of this act, shall build and maintain at all times as accessory works to such bridge, such booms, piers, dikes, guard fences, and similar devices as may be necessary to insure at all times a permanent channel for a sufficient distance above and below the bridge site, and for the guiding of rafts, steamboats, and other water craft safely under or through said bridge; and if at any time after the construction of the bridge and its accessory works, the approaches to draw openings, channel spans, or raft passages in said bridge are found to be dangerous or difficult of access bv river trailic, the Secretary of War may, upon the recommendation of the Chief of Engineers, United States Army, order the corporation,