FIFTY-FIRST CONGRESS. Sess. I. Ch. 918. 1890. 471 draw-bridge or with unbroken and continuous spans: Provided, Provboo. That 1f the said bridge shall be built with unbroken and continuous spans it shall have one or more channel-spans, each giving a clear spam. head-room of not less than fifty-five feet above high-water mark, as understood at the int of location, and a clear width of water-way of not less than tlllsee hundred and fifty feet, and the clear head room under other than channel-spans may be reduced to ten feet above high-water mark, as understood at the int of location, if the interests of navigation be not alfected thereby and the iers of Hm said bridge shall be parallel with the current of said river: Alnd provided further, That if any bridge built under the provisions of this act shall be constructed as a raw-bridge the same shall be constructed as a pivot draw-bridge, with a draw over the main channel Plvotdnw»®¤· of the river at an accessible and navigable point, and with spans giving a clear width of water-way of not less than two hundred feet on each side of the center or pivot gier of the draw, and the next adjoining span or spans to the raw s all give a clear width of waterway o not less t an three hundred feet, and the said spans shall give a clear head room of not less than ten feet above extreme highwater mark, and the piers of said bridge shall be parallel with the men. current of said river where said bridge may be erected: And provided, also, That said draw shall be opened promptly, `qy steam or opeuiugot dmv. other reliable mechanical power, upon reasonable s1gnal or the lpassage of boats, vessels, or other water-craft: And provided, also, hat if any bridge built under this act be located in the immediate vicinity b lgodlhed smug; it of the existing railroad bridge, the length of spans required by this ,§'u,Z,,'{;°¥,{.i,§§§° " act may be so modified as to make clear channe -ways correspond in length and location with the clear channel-ways of said existing bri ge: Provided, however, That no bridge shall be built under the Amwmviguum. provisions of this act, except there also be built at the time of the erection of the piers proper sheer-booms or other proper protection to safely guide boats, vessels, and other water-craft through said spans, at the expense of the city of Winona, or of the persons or corporation constructing} owning, or operatiuglthe bridge. Sec. 3. That any bridge constructed under this act an according mlnwful structure. to its provisions and conditions shall be a lawful structure, over ` which may be transmitted the mails, troops, and the munitions of war of the United States free of charge; and the United States shall have the right of way for postal telegraph purposes across said Postal wlemph. brid e. Sui. 4. That the structure herein authorized shall be built and located under and subject to such regulations for the security of the seem-ny er mugs navigation of said river as the Secretary of War shall prescribe, and “°“· to secure that object the said company or corporation shall submit to the Secretar of War, for his exammation and approval, a design ea-.·m;m.g’w..·a, and drawing og the bridge and a map of the location, giving, for the •PP’°'° °°°· s ace of one mile above and one mile below the proposed ocation, the topogra hy of the banks of the river, the shore—1ines of high and low water, {Sie direction and strength of the current at all stages, and the soundin , accurately showing the bed of the stream, the location of any othbr bridge or bridges, and shall furnish such other information as shall be required for a full and satisfactory understanding of the subject; and until the said plans and location of the bridge are decided by the Secretary of Wm to be such as will not materially afect the interests of l13V1g3i510D, the bridge shall not be commenced or built; and should any change be made in the plan of said bridge during the progress of construction, such chang? shall oungunpln. be subject to the a proval of the Secretary of War; and the said structure shall at aH times be so kept and managed as to offer reasonable and proper means for the passafge of vessels through or under said structure; and for the safety o vessels passinfg at night there shall be displayed on said bridge, from the hours o sunset to
