US Bridges

Old Alabama Road over Johns Creek

Fair

Fulton County, Georgia · 6.2 MI SE of Alpharetta · Structure no. 000000012102920

Built
1956
69 years old
Condition
Fair
inspected August 2023
Type
Channel Beam
Prestressed Concrete
Length
120 ft
4 main spans
Daily traffic
15,300
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Old Alabama Road over Johns Creek is a prestressed concrete channel beam carrying Old Alabama Road over Johns Creek in Fulton County, Georgia. It was built in 1956, so it is 69 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.

It carries about 15,300 vehicles a day, roughly 1% of them trucks, projected to reach 19,995 by 2031. The structure is 120 ft (36.6 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesOld Alabama Road
CrossesJohns Creek
Location6.2 MI SE of Alpharetta
RouteCounty Highway 9479
CountyFulton County
StateGeorgia
Coordinates34.01116, -84.21964
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.9 US tons
Inventory rating22.9 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans4
Design loadH 15
Structure length120 ft (36.6 m)
Longest span30 ft (9.1 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,300 (2024)
Projected traffic19,995 by 2031
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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$703,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Old Alabama Road over Johns Creek built?

It was built in 1956, making it 69 years old in 2025.

What condition is Old Alabama Road over Johns Creek 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 August 2023.

How much traffic does Old Alabama Road over Johns Creek carry?

About 15,300 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Old Alabama Road over Johns Creek?

The structure is 120 ft (36.6 m) long with a longest span of 30 ft (9.1 m) and a deck 24 ft wide.

Who owns Old Alabama Road over Johns Creek?

It is owned by the City or Municipal Highway Agency.