US Army Corps of Engineers
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Allatoona Lake Water Supply Storage Reallocation Study and Updates to Weiss and Logan Martin Reservoirs Project Water Control Manuals

 The U.S. Army Corps of Engineers (USACE), Mobile District has released the Allatoona-Coosa Reallocation Feasibility Report (FR) and Integrated Supplemental Environmental Impact Statement (SEIS) for Final National Environmental Policy Act (NEPA) Review.  The final SEIS will be published by the U.S. Environmental Protection Agency on November 20, 2020.  The review and comment period will end on January 25, 2021.


The Mobile District has prepared this NEPA compliant FR/SEIS to: 1) evaluate the 2018 water supply storage request from the State of Georgia seeking to reallocate water storage out of Allatoona Lake, 2) evaluate the proposed revised flood operations at two Alabama Power Company (APC) owned projects -- Weiss and Logan Martin Reservoirs; and 3) update any Water Control Manuals (WCMs), as necessary, as a result of changes in operations in the Alabama-Coosa-Tallapoosa (ACT) River Basin located in Alabama and Georgia. 

In January 2018, the U.S. District Court for the Northern District of Georgia issued a judgment in Georgia et al. v. U.S. Army Corps of Engineers, No. 14-cv-03593 (Jan. 9, 2018), directing the USACE to take final action responding to Georgia’s Reallocation Request by March 2021. Following that court decision, the State of Georgia submitted an updated request to the USACE on March 31, 2018. The USACE intends to evaluate actions necessary to implement Georgia’s request, as well as reasonable alternatives.

In May 2015, the USACE completed a long-term effort to update the Master WCM for the ACT basin, including updated WCMs for all five USACE projects (Allatoona Dam and Lake, Carters Dam and Lake and Carters Reregulation Dam, Robert F. Henry Lock and Dam, Millers Ferry Lock and Dam and Claiborne Lock and Dam). The USACE has flood risk management and navigation operational oversight at four reservoirs on the Coosa River that are owned by APC. Two of the four APC projects (H. Neely Henry Dam and Lake and R.L. Harris Dam and Lake) were also updated in 2015. 

WCMs for Weiss Dam and Lake and Logan Martin Dam and Lake, were not updated at that time because the USACE determined that additional information and analysis of the flood risk and necessary flood easements was required to properly consider APC’s proposed changes to the flood control operation.

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