US Bridges

I-675 over Conley Creek

Good

Clayton County, Georgia · @ Dekalb CO Line · Structure no. 000000006301330

Built
1984
41 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete
Length
68 ft
6 main spans
Daily traffic
82,400
2024 count
Owner
State
State Highway Agency

About this bridge

I-675 over Conley Creek is a concrete culvert carrying I-675 over Conley Creek in Clayton County, Georgia. It was built in 1984, so it is 41 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 82,400 vehicles a day, roughly 1% of them trucks, projected to reach 107,805 by 2032. The structure is 68 ft (20.7 m) long. If it were closed, the detour would be 3.1 mi (5 km).

CarriesI-675
CrossesConley Creek
Location@ Dekalb CO Line
RouteInterstate 675
StateGeorgia
Coordinates33.64711, -84.31779
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61 US tons
Inventory rating35.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans6
Design loadHS 20 + Mod
Structure length68 ft (20.7 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic82,400 (2024)
Projected traffic107,805 by 2032
Trucks1%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-675 over Conley Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is I-675 over Conley 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 April 2023.

How much traffic does I-675 over Conley Creek carry?

About 82,400 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is I-675 over Conley Creek?

The structure is 68 ft (20.7 m) long with a longest span of 10 ft (3 m).

Who owns I-675 over Conley Creek?

It is owned by the State Highway Agency.