Richard Greuel of Integrated Science and Engineering told city council members on Thursday that there’s a “clear path moving forward” for repairing the Lake Peachtree spillway and seemed hopeful the lake could be filled again by summertime.
Greuel explained that the recent decision from Georgia Environmental Protection Department (GEPD) to revert the dam to a Category II classification meant a solution will be fairly straightforward. ISE and Schnabel Engineering are working together on design options for the spillway. He said there are a series of steps that need to be taken, including a geotechnical evaluation of the dam, a “30-percent” design for the spillway, an emergency action plan, and permitting.
Greuel said that in engineering terms a 30-percent design doesn’t contain all design details but gives a rough idea of the dimensions of the project and, once that design is established, the city can get “good, hard cost estimates” for the spillway.
As for an emergency action plan, Greuel said this was a recommendation rather than a requirement and something that could be done fairly easily with modeling. He said the plan essentially addresses what the response should be in the event of “flood event” that caused a dam breach.
As for permitting, Greuel said the necessary permits should be relatively easily to obtain as they are “close to formalities.”
“I think we can get through this in a relatively expeditious manner,” Greuel said, “By spring we would be ready to move forward from those construction plans.”
He also said there is “nothing that precludes a temporary measure” for repairing the spillway and allowing some refilling of the lake while more extensive spillway designs are considered.
This process will run alongside the dredging that is planned for the next several months. The bids for the dredging have come in, Greuel said, but the county will be the one to select a bidder.