No county legislative body shall permit a bridge, milldam, fish trap, or other improvement to be so constructed as to interrupt or in any way injure or impair the navigation of the streams that are naturally navigable, or that have been declared to be so by law.
Code 1858, § 1259 (deriv. Acts 1835-1836, ch. 29, § 4); Shan., § 1723; Code 1932, § 3049; impl. am. Acts 1978, ch. 934, §§ 7, 36; T.C.A. (orig. ed.), § 54-1703.