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The Hall County Board of Commissioners (Applicant), Hall County, Georgia, has applied for a Department of the Army permit for a proposed water supply reservoir project to be located in Hall County to operate as part of a public water supply system.
The Applicant’s current project would consist of a new water supply reservoir, as well as a 4.5-mile pipeline and pumping station for withdrawing water from the Chattahoochee River. Click here for a revised project map, and click here to review the project history.
The U.S. Army Corps of Engineers (the Corps) Savannah District is reviewing this application (SAS-2007-00388) and is processing it pursuant to Section 404 of the Clean Water Act which regulates the discharge of dredged or fill material into waters of the United States. To fully evaluate the Applicant’s proposal, an Environmental Impact Statement (EIS) will be prepared to determine the effects of the proposal on the human and natural environment.
The proposed Glades Reservoir would be a pumped-storage reservoir located on Flat Creek, a tributary to the Chattahoochee River upstream of Lake Sidney Lanier. The proposed Glades Reservoir would be located approximately 12 miles northeast of Gainesville, Georgia, northeast of US 23/365, near the US 23/365 State Route (SR) 52 intersection. The drainage area for the proposed Glades Reservoir is estimated to be 17.6 square miles. The proposed dam would impound an approximately 850-acre reservoir at a normal pool elevation of 1180 feet mean sea level (msl) and provide 11.7 billion gallons of water storage capacity.
How Does the Proposed Project Work?
The proposed Glades Reservoir would store water pumped from the Chattahoochee River, as well as natural streamflow from Flat Creek. A pump station would be constructed on the bank of the Chattahoochee River and water would only be pumped to the proposed Glades Reservoir for storage when a minimum instream flow can be maintained in the Chattahoochee River. Water would be released from Glades Reservoir to Lake Lanier via Flat Creek, for withdrawal at one of Gainesville’s existing water intakes. Click here for a diagram illustrating the proposed operation of the project.
The safe yield for the proposed Glades Reservoir is estimated to be 72.5 million gallons per day (mgd) on an annual average daily basis. According to the Applicant this action is needed to meet the County’s water supply need through 2060.
Click here to view Hall County’s letter describing its current preferred project and potential operation scenarios.
Click here to view the Section 404 Permit Application for the proposed Glades Reservoir project.