Ind. Code § 8-4-1-21
If, at any time after the location of the track of such road, in whole or in part, and the filing of the map thereof, it shall appear to the directors of the railroad that the line thereof may be improved, such directors may, from time to time, alter the line, and cause a new map to be filed in the office where the map showing the first location is filed, and may thereupon take possession of the lands embraced in such new location that may be required for the construction and maintenance of such road on such new line, either by agreement with the owner or, if the railroad is a rail carrier, by such condemnation proceedings as are authorized under this chapter, and use the same in place of the line for which the new is substituted. But nothing in this chapter shall be so construed as to confer upon any railroad already incorporated, any powers to locate its road on any route which would not have been authorized by the charters previously granted. And nothing in this chapter contained shall authorize the railroad to make a location of their track within any city without the consent of the common council of said city; nor shall the railroad have power so to change their road as to avoid any point named in their articles of association.
IC 8-4-1-21