US Bridges

Third District Roa over South Prong Creek

GoodPosted for load

Dooly County, Georgia · 2.7 MI S of Unadilla · Structure no. 000000009300510

Built
1977
48 years old
Condition
Good
inspected June 2023
Type
Channel Beam
Prestressed Concrete
Length
80 ft
4 main spans
Daily traffic
170
2024 count
Owner
County
County Highway Agency

About this bridge

Third District Roa over South Prong Creek is a prestressed concrete channel beam carrying Third District Roa over South Prong Creek in Dooly County, Georgia. It was built in 1977, so it is 48 years old, older 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. Its operating status is: posted for load restriction.

It carries about 170 vehicles a day, roughly 1% of them trucks, projected to reach 240 by 2032. The structure is 80 ft (24.4 m) long and 25 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesThird District Roa
CrossesSouth Prong Creek
Location2.7 MI S of Unadilla
RouteCounty Highway 1585
StateGeorgia
Coordinates32.22656, -83.71424
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28 US tons
Inventory rating19 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans4
Design loadH 15
Structure length80 ft (24.4 m)
Longest span20 ft (6.1 m)
Deck width25 ft (7.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic170 (2024)
Projected traffic240 by 2032
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$469,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Third District Roa over South Prong Creek built?

It was built in 1977, making it 48 years old in 2025.

What condition is Third District Roa over South Prong Creek 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 June 2023.

How much traffic does Third District Roa over South Prong Creek carry?

About 170 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Third District Roa over South Prong Creek?

The structure is 80 ft (24.4 m) long with a longest span of 20 ft (6.1 m) and a deck 25 ft wide.

Who owns Third District Roa over South Prong Creek?

It is owned by the County Highway Agency.