FIFTY-SECOND CONGRESS. Sess. I. Ch. 124. 1892. 55 piers of said bridge shall be parallel with the current of the river at high water, and the main spans shall be over the main channels of the river: And provided also, That if a bridge shall be built under this act as a drawbridge the same shall be constructed as a pivot drawbridge, naw. with one or more draws, as the Secretary of War may prescribe, and with spans of not less than two hundred feet in length in the clear on each side of the central or pivot piers of the draws, and the next adjoining spans over the river to the draws shall not be less than two hundred and fifty feet in the clear, measured at low water; and said spans shall not be less than ten feet above extreme high-water mark, measuring to the lowest part of the superstructure of the bridge; and the piers of said bridge shall be parallel with the current of the river at high wate1·: And provided also, That said draw shall be opened promptly, upon opening mw. reasonable signal, without unnecessary delay; and said company or corporation shall maintain, at its own expense, from sunset till sunrise, such lights or other signals on said bridge as the Light-House Board L*g‘*”· °'°· shall prescribe, and such sheer booms or other structures as may be necessaryto safely guide vessels, rafts, or other water craft safely through said channel spans or draw openings, and as shall be designated and required by the Secretary of War: And provided further, That the corporation building said bridge may, subject to the approval of the Secretary of War, enter upon the banks of said river, either above or below cimma may be the point of location of said bridge, and confine the ilow of the water to '““°"‘ a permanent channel, and to do whatever may be necessary to accomplish said object, but shall not impede or obstruct the navigation of said river, and shall be liable in damages for all injuries to private property, and all plans for such works or erections upon the banks of the river shall first be submitted to the Secretary of Wm for his approval: And provided further, That any bridge built under the provisions of this act shall be at right angles to the current of the river at high water. * Sec. 3. That no bridge shall be erected or maintained under the au- U Q-¤l>¤¢r¤¤*<>¤ Muthority of this act which shall at any time substantially or materially "° l°°' obstruct the tree navigation of said river; and no bridge shall be commenced or built under this act until the location thereof and the plans and specifications for its construction shall have been submitted to and approved by the Secretary of War; and any change in the plan of such Smyvrriy of WM ¢¤ construction or any alteration in the bridge after its construction shall °°°"°`° P M"` °t°` be subject to the like approval; and whenever said bridge shall, in the opinion of the Secretary of War, substantially obstruct the free navigation of said river, he is hereby authorized to cause such change or alteration of said bridge to be made as will eifectually obviate such obstruction; and all such alterations shall be made and all such obstruc- A1¤¤rMi·>¤¤- tions be removed at the expense of the owner or owners of said bridge, or the persons operating or controlling the same; and in case of any litigation arising from any obstruction or alleged obstruction to the free L“*¤°*i°¤· navigation of the Missouri River, at or near the crossing of said bridge, caused or alleged to be caused thereby, the cause shall be commenced and tried in the circuit courts of the United States of either judicial district of South Dakota or Nebraska in which the said bridge or any portion of such obstruction touches. Sec. 4. That any bridge built under this act and according to its ,m{·,°;§§mu§;f“°*“” limitations shall be a lawful structure, and shall be recognized and ` known as a post route, upon which also no higher charge shall be made for the transportation over the same of the mails, the troops, and munitions of war of the United States than the rate per mile paid for their transportation over the railroad or public highways leading to such bridge. The United States shall also have the right to construct, without charge therefor, telegraph or telephone lines across said bridge. §EG. 5. That Congress may at any time alter, amend, or repeal this A¤¤¤¤¤¤¤¤¢. ¤¢¤- ac .