Tex. Spec. Dist. Code § 8501.153
(a) The Texas Commission on Environmental Quality shall consider the adequacy of, and decide whether to approve, any flood control or conservation improvement plan that:
(b) Before the authority establishes a diversion point or constructs a canal, pumping plant, or other work under this chapter, the authority must:
Acts 2003, 78th Leg., ch. 1277, Sec. 1, eff. April 1, 2005.