September 9, 2025 — The Altamaha River Basin in Georgia drains more than 14,000 square miles—including rivers in Athens, Macon, and parts of southeast Atlanta—into the Atlantic Ocean. Fish species like American eel, shad, blueback herring, and sturgeon use the Ocmulgee and Oconee Rivers and other tributaries in the watershed as they migrate upstream. However, several barriers, including the Juliette and Sinclair Dams, limit access to upstream habitat these fish have historically used for spawning. These dams are also reducing the quality of habitat by converting natural, free-flowing rivers into artificial lakes and interrupting the downstream flow of sediment.
NOAA worked alongside state and federal resource agencies to develop a basin-wide plan to re-establish fish passage above human-made barriers. The plan also addressed restoring the quality and quantity of available spawning habitat. To inform strategic fish passage design and implementation of the plan, we funded two university-led studies in the basin.