Tennessee Code Title 11. Natural Areas and Recreation § 11-13-108

(1) For a Class I river (the gorge and swamp rivers), the boundary shall be established in such a way that it includes at least the entire scenic vista from the river and its banks. For gorge rivers, the boundaries shall be no more than three thousand feet (3,000′) from the center of the river on each side. For swamp rivers, the boundaries shall be no more than one thousand feet (1,000′) from the center of the river on each side; and

(2) For Class II or Class III river areas, the boundary shall include the vista from the river and shall be no more than four hundred fifty feet (450′) from the usual banks of the river on each side.

(b)(1) If the commissioner of environment and conservation determines that the establishment of boundaries on that segment of Duck River established as a scenic river under § 11-13-104 is to be established then the commissioner shall initiate an outreach program to educate property owners and local communities in the area of this river segment about the program and the environmental and economic benefit the establishment of such boundaries provides. The commissioner shall then, using sound discretion and considering all relevant circumstances, establish a perpetual boundary of the scenic river area associated with the river or river segment.