In this subchapter:

1. (1) "Lake" means an inland body of standing water, including a reservoir formed by impounding the water of a river or creek but not including an impoundment of salt water or brackish water, that:

   1. (A) has a storage capacity of more than one million acre-feet; and
   2. (B) is owned in whole or part by a political subdivision of this state, including a special-purpose district or authority.
2. (2) "Lake area" means the area within 5,000 feet of where the shoreline of a lake would be if the lake were filled to its storage capacity.

Acts 1987, 70th Leg., ch. 149, Sec. 1, eff. Sept. 1, 1987.