US Bridges

Conley Road over I-285 (sr 407)

Good

Clayton County, Georgia · 1.5 MI E of I-75 · Structure no. 000000006300690

Built
1964
61 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
235 ft
4 main spans
Daily traffic
7,540
2024 count
Owner
State
State Highway Agency

About this bridge

Conley Road over I-285 (sr 407) is a steel continuous stringer/multi-beam or girder carrying Conley Road over I-285 (sr 407) in Clayton County, Georgia. It was built in 1964, so it is 61 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 7,540 vehicles a day, roughly 1% of them trucks, projected to reach 8,085 by 2032. The structure is 235 ft (71.6 m) long and 34 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesConley Road
CrossesI-285 (sr 407)
Location1.5 MI E of I-75
RouteCity Street 9010
CountyClayton County
StateGeorgia
Coordinates33.64055, -84.37632
Functional classUrban Collector

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 inspectionJune 2023
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 alignment7: Better than present minimum criteria
Operating rating48.9 US tons
Inventory rating29 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length235 ft (71.6 m)
Longest span78 ft (23.8 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,540 (2024)
Projected traffic8,085 by 2032
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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$462,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Conley Road over I-285 (sr 407) built?

It was built in 1964, making it 61 years old in 2025.

What condition is Conley Road 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 June 2023.

How much traffic does Conley Road over I-285 (sr 407) carry?

About 7,540 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Conley Road over I-285 (sr 407)?

The structure is 235 ft (71.6 m) long with a longest span of 78 ft (23.8 m) and a deck 34 ft wide.

Who owns Conley Road over I-285 (sr 407)?

It is owned by the State Highway Agency.