Officials with the U.S. Army Corps of Engineers say a draft statement of the impact of a new reservoir upstream of Lake Lanier should be complete by the end of the year.Last week, the corps made public a number of comments submitted on Hall County’s proposal to build Glades Reservoir.Spokesman Billy Birdwell says the federal agency will use the comments — most of them from government organizations —to guide an analysis of the proposed reservoir.The comments show officials in neighboring Alabama and Florida are watching what happens with the project. So are leaders in the federal Environmental Protection Agency.Hall County officials want to turn a North Hall section of Flat Creek, which flows into the Chattahoochee River upstream of Lake Lanier, into an 850-acre reservoir that will quench the thirst of a population the county projects to reach 800,000.Officials from Georgia, Florida and Alabama have dueled in court for two decades over control of the water in the Apalachicola-Chattahoochee-Flint river basin. That’s a key reason the corps has submitted Glades to the scrutiny of an environmental impact statement before granting county officials permission to build the reservoir.In the past, most reservoir projects in the state were put through a less strenuous review process.In a letter to the corps, J. Brian Atkins, division director of the Alabama Office of Water Resources, asked that the corps’ environmental impact statement for Glades include an independent analysis of the county’s 2060 population estimate.Atkins cited other estimates that were nearly half the county’s estimated population.“The proposed project, which is based upon a tenuous claim of need, with the resulting sale of water by Hall County to unnamed third parties, hardly seems the kind of project that outweighs the significant environmental and economic costs associated with it,” Atkins wrote.In their comments, both Alabama and Florida used the county’s spat with Gainesville officials over the ownership of the existing Cedar Creek Reservoir to question the viability of the Glades proposal.Cedar Creek, in the Oconee River basin, is part of the county’s larger plan to use Glades for water supply.