US Bridges

Cham. Dunwoody Rd. over I-285 (sr 407)

Good

DeKalb County, Georgia · 2 MI NW of Chamblee · Structure no. 000000008901940

Built
1961
64 years old, rebuilt 1980
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
273 ft
4 main spans
Daily traffic
17,400
2024 count
Owner
State
State Highway Agency

About this bridge

Cham. Dunwoody Rd. over I-285 (sr 407) is a steel continuous stringer/multi-beam or girder carrying Cham. Dunwoody Rd. over I-285 (sr 407) in DeKalb County, Georgia. It was built in 1961 and reconstructed in 1980, so it is 64 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 17,400 vehicles a day, roughly 1% of them trucks, projected to reach 18,270 by 2031. The structure is 273 ft (83.2 m) long and 75 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesCham. Dunwoody Rd.
CrossesI-285 (sr 407)
Location2 MI NW of Chamblee
RouteCity Street 9260
StateGeorgia
Coordinates33.92027, -84.3148
Functional classUrban Minor 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.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating29 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length273 ft (83.2 m)
Longest span75 ft (22.9 m)
Deck width75 ft (23 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,400 (2024)
Projected traffic18,270 by 2031
Trucks1%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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$2.9 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Cham. Dunwoody Rd. over I-285 (sr 407) built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1980.

What condition is Cham. Dunwoody Rd. over I-285 (sr 407) 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 August 2024.

How much traffic does Cham. Dunwoody Rd. over I-285 (sr 407) carry?

About 17,400 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Cham. Dunwoody Rd. over I-285 (sr 407)?

The structure is 273 ft (83.2 m) long with a longest span of 75 ft (22.9 m) and a deck 75 ft wide.

Who owns Cham. Dunwoody Rd. over I-285 (sr 407)?

It is owned by the State Highway Agency.