US Bridges

US 78 over SR 10 Wbl- SR 10R to 78W

Fair

DeKalb County, Georgia · 0.9 MI N of Stone Mtn · Structure no. 000000008901130

Built
1966
59 years old, rebuilt 1989
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
185 ft
4 main spans
Daily traffic
85,900
2024 count
Owner
State
State Highway Agency

About this bridge

US 78 over SR 10 Wbl- SR 10R to 78W is a steel stringer/multi-beam or girder carrying US 78 over SR 10 Wbl- SR 10R to 78W in DeKalb County, Georgia. It was built in 1966 and reconstructed in 1989, 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 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 85,900 vehicles a day, roughly 1% of them trucks, projected to reach 129,450 by 2031. The structure is 185 ft (56.4 m) long and 123 ft wide.

Location

Open in Google Maps
CarriesUS 78
CrossesSR 10 Wbl- SR 10R to 78W
Location0.9 MI N of Stone Mtn
RouteU.S. Route 78
CountyDeKalb County
StateGeorgia
Coordinates33.82092, -84.16897
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating25.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length185 ft (56.4 m)
Longest span51 ft (15.5 m)
Deck width123 ft (37.4 m)
Roadway width117 ft (35.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic85,900 (2024)
Projected traffic129,450 by 2031
Trucks1%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 78 over SR 10 Wbl- SR 10R to 78W built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 1989.

What condition is US 78 over SR 10 Wbl- SR 10R to 78W 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 June 2024.

How much traffic does US 78 over SR 10 Wbl- SR 10R to 78W carry?

About 85,900 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is US 78 over SR 10 Wbl- SR 10R to 78W?

The structure is 185 ft (56.4 m) long with a longest span of 51 ft (15.5 m) and a deck 123 ft wide.

Who owns US 78 over SR 10 Wbl- SR 10R to 78W?

It is owned by the State Highway Agency.