US Bridges

US 78-US 278 over Sweetwater Creek

Good

Cobb County, Georgia · In East Austell · Structure no. 000000006700310

Built
1944
81 years old, rebuilt 1994
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
202 ft
2 main spans
Daily traffic
26,400
2024 count
Owner
State
State Highway Agency

About this bridge

US 78-US 278 over Sweetwater Creek is a steel continuous stringer/multi-beam or girder carrying US 78-US 278 over Sweetwater Creek in Cobb County, Georgia. It was built in 1944 and reconstructed in 1994, so it is 81 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.

It carries about 26,400 vehicles a day, roughly 1% of them trucks, projected to reach 28,380 by 2032. The structure is 202 ft (61.6 m) long and 80 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesUS 78-US 278
CrossesSweetwater Creek
LocationIn East Austell
RouteU.S. Route 78
StateGeorgia
Coordinates33.81546, -84.62224
Functional classUrban Other Principal 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.9 US tons
Inventory rating24.9 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+3 approach)
Design loadH 15
Structure length202 ft (61.6 m)
Longest span60 ft (18.3 m)
Deck width80 ft (24.5 m)
Roadway width64 ft (19.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,400 (2024)
Projected traffic28,380 by 2032
Trucks1%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$2.2 million
NavigationNo navigation control on waterway

Frequently asked questions

When was US 78-US 278 over Sweetwater Creek built?

It was built in 1944, making it 81 years old in 2025. It was reconstructed in 1994.

What condition is US 78-US 278 over Sweetwater 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 October 2023.

How much traffic does US 78-US 278 over Sweetwater Creek carry?

About 26,400 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is US 78-US 278 over Sweetwater Creek?

The structure is 202 ft (61.6 m) long with a longest span of 60 ft (18.3 m) and a deck 80 ft wide.

Who owns US 78-US 278 over Sweetwater Creek?

It is owned by the State Highway Agency.