US Bridges

Northlake Parkway over I-285 (sr 407)

Fair

DeKalb County, Georgia · 2.9 MI N of Clarkston · Structure no. 000000008901800

Built
1968
57 years old, rebuilt 1984
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
212 ft
4 main spans
Daily traffic
9,350
2024 count
Owner
State
State Highway Agency

About this bridge

Northlake Parkway over I-285 (sr 407) is a steel stringer/multi-beam or girder carrying Northlake Parkway over I-285 (sr 407) in DeKalb County, Georgia. It was built in 1968 and reconstructed in 1984, so it is 57 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 9,350 vehicles a day, roughly 1% of them trucks, projected to reach 16,065 by 2031. The structure is 212 ft (64.6 m) long and 79 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNorthlake Parkway
CrossesI-285 (sr 407)
Location2.9 MI N of Clarkston
RouteCity Street 9223
CountyDeKalb County
StateGeorgia
Coordinates33.85119, -84.24662
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 inspectionJuly 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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.9 US tons
Inventory rating23.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length212 ft (64.6 m)
Longest span76 ft (23.2 m)
Deck width79 ft (24 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,350 (2024)
Projected traffic16,065 by 2031
Trucks1%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 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$1.9 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Northlake Parkway over I-285 (sr 407) built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 1984.

What condition is Northlake Parkway 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 July 2024.

How much traffic does Northlake Parkway over I-285 (sr 407) carry?

About 9,350 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Northlake Parkway over I-285 (sr 407)?

The structure is 212 ft (64.6 m) long with a longest span of 76 ft (23.2 m) and a deck 79 ft wide.

Who owns Northlake Parkway over I-285 (sr 407)?

It is owned by the State Highway Agency.