US Bridges

Flat Bridge Road over South River

FairPosted for load

Rockdale County, Georgia · 5 MI SW of Conyers · Structure no. 000000024700160

Built
1959
66 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
152 ft
3 main spans
Daily traffic
11,256
2024 count
Owner
County
County Highway Agency

About this bridge

Flat Bridge Road over South River is a steel stringer/multi-beam or girder carrying Flat Bridge Road over South River in Rockdale County, Georgia. It was built in 1959, so it is 66 years old, older than the Georgia average of 47.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 11,256 vehicles a day, roughly 1% of them trucks, projected to reach 6,945 by 2032. The structure is 152 ft (46.3 m) long and 25 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesFlat Bridge Road
CrossesSouth River
Location5 MI SW of Conyers
RouteCity Street 9339
CountyRockdale County
StateGeorgia
Coordinates33.63016, -84.12848
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating33 US tons
Inventory rating19 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length152 ft (46.3 m)
Longest span51 ft (15.5 m)
Deck width25 ft (7.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,256 (2024)
Projected traffic6,945 by 2032
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$891,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Flat Bridge Road over South River built?

It was built in 1959, making it 66 years old in 2025.

What condition is Flat Bridge Road over South River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2023.

How much traffic does Flat Bridge Road over South River carry?

About 11,256 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Flat Bridge Road over South River?

The structure is 152 ft (46.3 m) long with a longest span of 51 ft (15.5 m) and a deck 25 ft wide.

Who owns Flat Bridge Road over South River?

It is owned by the County Highway Agency.