US Bridges

Hamby Road over Chicken Creek Trib

GoodPosted for load

Fulton County, Georgia · 6 MI N of Alpharetta · Structure no. 000000012150050

Built
1966
59 years old
Condition
Good
inspected November 2023
Type
Channel Beam
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
2,047
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Hamby Road over Chicken Creek Trib is a prestressed concrete channel beam carrying Hamby Road over Chicken Creek Trib in Fulton County, Georgia. It was built in 1966, so it is 59 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 2,047 vehicles a day, roughly 1% of them trucks, projected to reach 2,910 by 2031. The structure is 30 ft (9.1 m) long and 24 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesHamby Road
CrossesChicken Creek Trib
Location6 MI N of Alpharetta
RouteCounty Highway 12
StateGeorgia
Coordinates34.1596, -84.26717
Functional classUrban Local

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 protection7 GoodSome minor problems.
Last inspectionNovember 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.9 US tons
Inventory rating21.9 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 15
Structure length30 ft (9.1 m)
Longest span30 ft (9.1 m)
Deck width24 ft (7.4 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,047 (2024)
Projected traffic2,910 by 2031
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$176,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Hamby Road over Chicken Creek Trib built?

It was built in 1966, making it 59 years old in 2025.

What condition is Hamby Road over Chicken Creek Trib 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 November 2023.

How much traffic does Hamby Road over Chicken Creek Trib carry?

About 2,047 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Hamby Road over Chicken Creek Trib?

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

Who owns Hamby Road over Chicken Creek Trib?

It is owned by the City or Municipal Highway Agency.