Tex. Spec. Dist. Local Laws Code § 1090.109

In exercising the power of eminent domain, if the board requires relocating, raising, lowering, rerouting, changing the grade, or altering the construction of any railroad, electric transmission, telegraph or telephone line, conduit, pole, or facility, or pipeline, the board must bear the actual cost of relocating, raising, lowering, rerouting, changing the grade, or altering the construction to provide comparable replacement without enhancement of facilities, after deducting the net salvage value derived from the old facility.