Tex. Water Code § 15.804
(a) On the request of a political subdivision or agency of this state or a neighboring state or a federal agency, the board may perform a hydrographic survey in this state or outside of this state if the information collected will benefit this state. The board may perform a survey under this section:
(1) to determine:
Added by Acts 1991, 72nd Leg., 1st C.S., ch. 3, Sec. 1.062, eff. Aug. 12, 1991.
Amended by Acts 2001, 77th Leg., ch. 1234, Sec. 21, eff. Sept. 1, 2001.