Section 1183. Obligations of public utilities

Wherever railroad tracks,
  street railroad tracks, gas pipes,  telephone  wires,  telegraph  wires,
  electric  light  or  power  wires,  or  conduits for carrying telephone,
  telegraph or electric wires, or other structures of any  public  service
  corporation,  extend in, along or across any part of the work authorized
  by this title, it shall be and become the duty of the corporation owning
  or using such tracks, pipes, wires or conduits, or other structures,  to
  make  such  changes  in the same, at its own expense, as may be required
  during the construction of the improvement provided for in  this  title,
  and  to construct or rebuild and maintain at its own expense its tracks,
  pipes, wires or conduits and structures over or along the work  by  this
  title  authorized  and  constructed or in the process of construction in
  pursuance thereof.