491Approval of and deviation from plans; exemptions492Bridge as post route; limitation as to charges against Government; telegraph and telephone lines493Use of railroad bridges by other railroad companies494Obstruction of navigation; alterations and removals; lights and signals; draws494aStudy of bridges over navigable waters495Violations of orders respecting bridges and accessory works496Time for commencement and completion of bridge497“Persons” defined498Reservation of right to alter or repeal498aRepealed. Pub. L. 100–17, title I, § 135(b), Apr. 2, 1987, 101 Stat. 174Repealed498bRepealed. Pub. L. 100–17, title I, § 135(c), Apr. 2, 1987, 101 Stat. 174Repealed499Regulations for drawbridges500Deflection of current; liability to riparian owners501OmittedRepealed502Alteration, removal, or repair of bridge or accessory obstructions to navigation503 to 507Repealed. Pub. L. 100–17, title I, § 135(d), Apr. 2, 1987, 101 Stat. 174Repealed508Amount of tolls