US Bridges

US 278 / SR 6 over Sweetwater Creek

Good

Cobb County, Georgia · 1.5 Miles West of Austell · Structure no. 000000006701910

Built
1983
42 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
219 ft
3 main spans
Daily traffic
37,600
2024 count
Owner
State
State Highway Agency

About this bridge

US 278 / SR 6 over Sweetwater Creek is a prestressed concrete stringer/multi-beam or girder carrying US 278 / SR 6 over Sweetwater Creek in Cobb County, Georgia. It was built in 1983, so it is 42 years old, younger 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 37,600 vehicles a day, roughly 1% of them trucks, projected to reach 50,340 by 2032. The structure is 219 ft (66.8 m) long and 89 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesUS 278 / SR 6
CrossesSweetwater Creek
Location1.5 Miles West of Austell
RouteU.S. Route 278
StateGeorgia
Coordinates33.81735, -84.65578
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating20 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length219 ft (66.8 m)
Longest span73 ft (22.3 m)
Deck width89 ft (27.2 m)
Roadway width86 ft (26.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37,600 (2024)
Projected traffic50,340 by 2032
Trucks1%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
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$2.3 million
NavigationNo navigation control on waterway

Frequently asked questions

When was US 278 / SR 6 over Sweetwater Creek built?

It was built in 1983, making it 42 years old in 2025.

What condition is US 278 / SR 6 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 May 2023.

How much traffic does US 278 / SR 6 over Sweetwater Creek carry?

About 37,600 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is US 278 / SR 6 over Sweetwater Creek?

The structure is 219 ft (66.8 m) long with a longest span of 73 ft (22.3 m) and a deck 89 ft wide.

Who owns US 278 / SR 6 over Sweetwater Creek?

It is owned by the State Highway Agency.