(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 authority, in the exercise of the power of eminent domain, the power of relocation, or any other power granted under this chapter, makes necessary the relocating, raising, rerouting, changing the grade of, or altering the construction of a highway, a railroad, an electric transmission line, a pipeline, or a telephone or telegraph property or facility, the necessary relocation, raising, rerouting, changing the grade of, or alteration of construction shall be accomplished at the sole expense of the authority. Added by Acts 2005, 79th Leg., Ch. 729 (H.B. 2019), Sec. 1.06, eff. April 1, 2007.