On August 17, the Peachtree City Mayor and Council unanimously approved a $4.387 million construction contract with North Georgia Concrete for the Lake Peachtree Spillway Replacement. North Georgia Concrete built the Lake McIntosh dam and spillway, along with the recent Pye Lake dam replacement in Fayetteville. Fayette County and Peachtree City will jointly fund the project, which was included in the 2017 SPLOST list.
The new spillway will feature a “piano key weir,” which allows for the greatest outflow of water during heavy storm events, while preserving the adjacent Kelly Drive/McIntosh Trail bridge. The spillway has been designed to meet the State’s latest Category 1 dam specifications (updated in the past year), and the dam will also be upgraded to the Category 1 requirements.
The City will issue the Notice to Proceed for September, in line with the project timeline (available at www.peachtree-city.org/LAKE). The water level of Lake Peachtree will begin to be lowered on Monday, August 28, by a maximum of eight feet. The project is then scheduled to allow for incremental water level increases (by two feet in November after the cofferdam construction, and another possible two feet in February after the spillway foundation has been completed).
While all construction projects of this nature are influenced by the elements, time has been built into the schedule to anticipate bad weather, while minimizing the area of exposed lake bed during weed-growing season. The cofferdam and a corresponding lowering of Lake Kedron by two feet in November will protect the construction area from significant rain events.
During construction of the spillway, a path detour around the work zone will also be required. Traffic on the east side of Lake Peachtree will connect with McIntosh Trail via Fishers Luck. The McIntosh Trail / Kelly Drive bridge will be closed to golf cart traffic, requiring use of the path bridge over Flat Creek just south of the roadway. A new path has been cleared from that bridge back to Kelly Drive adjacent to the Community Gardens.
The entire spillway project remains on schedule for Lake Peachtree to begin refilling in May 2018, with completion in June 2018.