Page:United States Statutes at Large Volume 27.djvu/293

 266 rrrrvsnooun oouemass. snss. 1. cn. 2u. isoz. mma. spans: Provided, That if the said bridge shall be built with unspam. broken or continuous spans it shall have one or more channel spans, each having not less than two hundred feet clear channel way, measured normal to the current of said river, and not less than fifty feet clear headroom above higlrwater mark, and the clear headroom under the Height- other channel spans may be less than fifty feet: Provided, That no part of the superstructure of such spans shall give a less headroom than ten Pi·»¤,¤w- feet above high-water mark: And provided further, That the interests of navigation be not injured by such reduction in height; and the piers of said bridge shall be parallel with the current of said river, and the main span shall be over the main channel of the river, and not less naw. than two hundred feet in length: And provided also, That if any bridge built under this act shall be constructed as a drawbridge, the same shall be constructed as a pivot drawbridge, with a draw over the main channel of the river at an accessible and navigable point and with spans of not less than one hundred feet in length, measured normal to the current of said river, ou each side of the central or pivot pier of the ` draw; and the next adjoining spans to the draw shall not be less than two hundred feet in length, measured normal to the current of said river, and every part of the superstructure shall give a clear headroom Location of spans. of not less than ten feet above high watermark: Provided, That the spans of both high and low bridges shall be so located as to afford the greatest possible accommodations to the river traiiic, and a draw opening of low bridges shall, if practicable, be located next or near shore; and the piers of said bridge shall be parallel with the current of the river when said bridge may be erected: And provided also, That opmngamw. said draw shall be opened promptly upon reasonable signal for the A,,,,,,m,,,_ passage of boats: And provided also, That if the approaches by landto said bridge shall be built over land submerged at high water; said approaches shall be provided with sunicient passage for water, in connection with the water way through the spans of said bridge, to pass thejlood discharge of the Black River without unduly increasing the velocity of How through the navigated spans of said bridge: And pro- · ¤¤¤¤·> ¤·ris¤¤¤¤· vided also, That all such dikes, booms, piers, fences, wing dams, and other necessary works that may be necessary to safely guide all steamboats, rafts, tows, and other water craft navigating said river, up to and through said draw or channel spans at any and all stages of water in the Black River, within a distance of one mile above and one-half mile below said bridge shall be located, constructed, and maintained X, m ,,,0,,. ,,, at all times as may be required by the Secretary of War·: And pro- Pmcllzs-¤*¤· vided also, That the approaches of said bridge by land or by water within the limits of high water with limiting and level lines of the natural surface, grades of track, and proposed high-water discharge openings, within said overilowed limits along the line of such road or any road using said bridge and all accessory works herein required umoug other data hereinafter required shall be imlivated, shown and located upon the maps and plans of said bridge, hereinafter required to be submitted for approval to the Secretary of War. ‘ r.¤»»~nn semteum Sec. 3. That any bridge constructed under this act and according to "“" l’°*‘ ""“‘°· its limitation shall be a lawful structure, and shall be known and recognized as a post route, and the same is hereby declared to be a post route, upon which also 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 their transportation over the railroads and public highways leading to the said bridge, and the United States shall have the right of way for a postal iran.: mxegmpn. telegraph across said bridge. reg by other com- Sue. 4; That all railway companies desiring to use said bridge shall 1"“"`“‘ ‘ have and be entitled to equal rights and privileges in the passage of the same and in the use of the machinery and iixtures thereof, and of T¤¤·¤- the approaches thereto, under aud upon such terms and conditions as