The Alabama-Coosa-Tallapoosa River Basin (ACT River Basin) is a drainage basin (watershed) in the Southeastern United States. This area is classified as a sub-region by the USGS hydrological code system.
This sub-region consists of two basins, per the hydrological code system, namely the Coosa-Tallapoosa basin, and the Alabama basin.
Further, here are the sub-basins of each of these two basins:
Coosa-Tallapoosa basin
Alabama basin