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 works503 to 507Repealed. Pub. L. 100–17, title I, § 135(d), Apr. 2, 1987, 101 Stat. 174Repealed496Time 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 owners501Omitted502Alteration, 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