Tenn. Code § 11-13-104
The rivers or segments of rivers to be initially included in this system, being classified by the above-stated criteria, are as follows:
Class I Natural River Areas
Blackburn Fork - That segment of the stream from the county road at Cummings Mill downstream one and one-half (11/2) miles.
Chickamauga Creek - The segment of North Chickamauga Creek in Hamilton County from a point approximately at the confluence of Hixson Branch continuing to a point eight and three-tenths miles (8.3 mi.) downstream to the North Chickamauga Creek Gorge visitor access on Montlake Road in Hamilton County, and that one and one-half miles (1.5 mi.) segment of its tributary Cain Creek from the department of environment and conservation property line to the confluence with North Chickamauga Creek.
Conasauga River - The entire segment of the river in Polk County, upstream from the Highway 411 bridge.
Duskin Creek - That continuous segment of Duskin Creek from its confluence with Newby Branch in Rhea County downstream to its confluence with Piney River in Rhea County.
Hatchie River as a swamp river.
Little Piney Creek - That continuous segment of Little Piney Creek entirely within Piney Falls State Natural Area in Rhea County downstream to its confluence with Soak Creek in Rhea County.
Piney River - That continuous segment of Piney River, in Rhea County from its confluence with Moccasin Creek downstream to its confluence with RockHouse Branch.
Roaring River - That segment from State Route 136 downstream two (2) miles.
Spring Creek - That segment from Waterloo Mill downstream to the Overton-Jackson county line.
Class II Pastoral River Areas
Blackburn Fork - That segment downstream from a point one and one-half (11/2) miles downstream from the county road at Cummings Mill to its confluence with Roaring River.
Buffalo River - The entire river, except that portion which lies within Wayne, Perry, Humphreys and Lewis counties.
Collins River - That segment which lies within the Savage Gulf natural-scientific area.
Duck River - That segment of the Duck River beginning at Iron Bridge Road at river mile 136.4 extending continuously to a point upstream to the boundary of Marshall County at river mile 173.7.
Duck River - That segment of the Duck River beginning at Industrial Park Road approximately at river mile 128 extending continuously to a point downstream to the boundary of Hickman County at approximately river mile 98 downstream from the Natchez Trace River Bridge.
Harpeth River - The entire river except that segment lying north of Highway 100 and south of Interstate 40 in Davidson County; and except those segments located in Cheatham, Dickson and Williamson counties.
Roaring River - That segment downstream from a point two (2) miles downstream from State Route 136, to its confluence with the Cordell Hull Lake.
Spring Creek - That segment between State Highway 136 and Waterloo Mill, and that segment downstream from the Overton-Jackson county line to its confluence with Roaring River.
Class III Developed River Areas
French Broad River - That segment from the North Carolina state line to its confluence with Douglas Lake.
Harpeth River - Only that segment of the Harpeth River lying north of Highway 100 and south of Interstate 40; it being the specific intent to exclude all segments of the Harpeth River lying in or flowing though Cheatham, Dickson and Williamson counties.
Tuckahoe Creek
Hiwassee River - That portion from the Highway 411 bridge to the North Carolina line.
Clinch River - That portion from Melton Hill Dam upstream to Pellissippi Parkway.
Soak Creek - That segment of Soak Creek beginning in Bledsoe County at its confluence with Georgia Branch continuing to a point downstream to its confluence with the Piney River in Rhea County.
Class IV Olympic River Areas
Ocoee River - That segment of the Ocoee River from Ocoee Dam No. 3 to its confluence with Big Creek.
T.C.A. § 11-13-104