US Bridges

Flakes Mill Road over South River

Good

DeKalb County, Georgia · 8.25 Miles SE of Decatur · Structure no. 000000008951670

Built
2009
16 years old
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
350 ft
3 main spans
Daily traffic
13,100
2024 count
Owner
County
County Highway Agency

About this bridge

Flakes Mill Road over South River is a prestressed concrete stringer/multi-beam or girder carrying Flakes Mill Road over South River in DeKalb County, Georgia. It was built in 2009, so it is 16 years old, younger than the Georgia average of 47.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 13,100 vehicles a day, roughly 1% of them trucks, projected to reach 19,890 by 2031. The structure is 350 ft (106.7 m) long and 62 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesFlakes Mill Road
CrossesSouth River
Location8.25 Miles SE of Decatur
RouteCounty Highway 5186
StateGeorgia
Coordinates33.66567, -84.22433
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating57 US tons
Inventory rating24.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length350 ft (106.7 m)
Longest span126 ft (38.4 m)
Deck width62 ft (19 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,100 (2024)
Projected traffic19,890 by 2031
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$2.1 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Flakes Mill Road over South River built?

It was built in 2009, making it 16 years old in 2025.

What condition is Flakes Mill Road over South River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2024.

How much traffic does Flakes Mill Road over South River carry?

About 13,100 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Flakes Mill Road over South River?

The structure is 350 ft (106.7 m) long with a longest span of 126 ft (38.4 m) and a deck 62 ft wide.

Who owns Flakes Mill Road over South River?

It is owned by the County Highway Agency.