Single-lane closures are set for 11 a.m. to 2 p.m. Thursday as work continues on the Boling Bridge replacement on Dawsonville Highway/Ga. 53 at the Hall-Forsyth county line.
Flagging operators will direct traffic on both sides of the bridge between Dogwood Path and Little Hall Park.
Most other lane closures associated with the project have been at night.
This specific closure will allow for the building of temporary dams to pump water from the lake to make room to build supports for the bridge, Georgia Department of Transportation district spokeswoman Katie Strickland said.
DOT asks drivers to slow to 35 mph in the work zone.
Scott Bridge Co., of Opelika, Ala., is handling the $20 million project, which calls for construction of the new bridge next to the current bridge, then demolition of the current bridge. The project is scheduled for a March 31, 2019, completion.