Texas Local Government Code - LOC GOV'T § 231.072. Definitions

(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:

(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.