Tenn. Code Ann. § 69-1-108: Diverting water from main channel

(a) No person, upon pretense of having a right to the flow of water through a sluice of a navigable watercourse, on which sluice such person has built a mill, shall divert the water from the main channel into the sluice, so as to obstruct or impede the navigation of the main channel.

(b) A violation of this section is a Class C misdemeanor.