Approximately 2,131 sq mi / 1,364,122 acres
Lauderdale and Limestone Counties AL; Coffee, Franklin, Giles, Grundy, Lawrence, Lincoln, Marshall, Maury and Moore Counties TN.
Streamline Chub, Bluebreast Darter, Ashy Darter, Boulder Darter, Shoal Chub, Ghost Shiner, Mountain Madtom, Stonecat, Gilt Darter, Stargazing Minnow.
Snuffbox,Cracking Pearlymussel, Alabama Lampmussel, Slabside Pearlymussel,
Black Sandshell (H)
, Ohio Pigtoe (H)
, Rough Pigtoe (H)
, Tennessee Pigtoe (H)
, Monkeyface (H)
, Pale Lilliput (H)
, Mucket (H), Spectaclecase (H), Fanshell (H), Spike (H), Longsolid (H).
Warty Rocksnail, Rugged Hornsnail.
(H) = Historic (species historically occurred in the SHU or SRRU but, it has either not been collected in a number of years, and may be considered extirpated, or the species could be present but there aren’t recent records to document its presence).