(a) In this section, "sole expense" means the actual cost of relocating, raising, lowering, rerouting, changing the grade of, or altering the construction of a facility described by Subsection (b) in providing comparable replacement without enhancement of the facility, after deducting from that cost the net salvage value of the old facility.
(b) If the district's exercise of its power of eminent domain, police power, or any other power conferred by this chapter makes necessary the relocation, raising, lowering, rerouting, changing the grade, or alteration of the construction of a railroad, an electric transmission, telegraph, or telephone line, property, or facility, or a pipeline, the necessary action shall be accomplished at the sole expense of the district.