US Bridges

Columbia Drive over I-285 (sr 407)

Fair

DeKalb County, Georgia · 8.5 MI SE of Decatur · Structure no. 000000008901540

Built
1967
58 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
300 ft
4 main spans
Daily traffic
10,100
2024 count
Owner
State
State Highway Agency

About this bridge

Columbia Drive over I-285 (sr 407) is a steel continuous stringer/multi-beam or girder carrying Columbia Drive over I-285 (sr 407) in DeKalb County, Georgia. It was built in 1967, so it is 58 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 10,100 vehicles a day, roughly 4% of them trucks, projected to reach 16,005 by 2031. The structure is 300 ft (91.4 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesColumbia Drive
CrossesI-285 (sr 407)
Location8.5 MI SE of Decatur
RouteCounty Highway 9121
CountyDeKalb County
StateGeorgia
Coordinates33.70174, -84.25217
Functional classUrban Collector

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMarch 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 geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44 US tons
Inventory rating25.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length300 ft (91.4 m)
Longest span83 ft (25.3 m)
Deck width34 ft (10.5 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,100 (2024)
Projected traffic16,005 by 2031
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$1.8 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Columbia Drive over I-285 (sr 407) built?

It was built in 1967, making it 58 years old in 2025.

What condition is Columbia Drive over I-285 (sr 407) 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 March 2024.

How much traffic does Columbia Drive over I-285 (sr 407) carry?

About 10,100 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is Columbia Drive over I-285 (sr 407)?

The structure is 300 ft (91.4 m) long with a longest span of 83 ft (25.3 m) and a deck 34 ft wide.

Who owns Columbia Drive over I-285 (sr 407)?

It is owned by the State Highway Agency.