If a county, in the exercise of a power under this subchapter, including the power of eminent domain or the power of relocation, makes necessary the relocation or rerouting of, or alteration of the construction of, a highway, railroad, electric transmission line or pipeline, or telegraph or telephone property or facility, the relocation or rerouting or alteration of construction must be accomplished at the sole expense of the county.
Tex. Gov't. Code § 1477.121