Tex. Water Code § 56.120: RAILROAD CULVERTS.

(a) At the expense of the district, the board may construct necessary bridges and culverts across or under a track or right-of-way of a railroad to enable the district to construct and maintain a necessary canal, drain, or ditch.

(b) Before the board constructs a bridge or culvert, the board shall give notice to the railroad authorities authorized to build or construct bridges and culverts and shall allow the railroad 30 days to build the bridge or culvert at its own expense and according to its own plans.

(c) Bridges or culverts shall be constructed so they will not interfere with the free and unobstructed flow of water passing through the canals and drains and shall be placed at points designated by the engineer.

Acts 1971, 62nd Leg., p. 508, ch. 58, Sec. 1, eff. Aug. 30, 1971.