US Bridges

I-475 Nbl over I-75 Sbl & Hart

Good

Bibb County, Georgia · 2 Mi. S of Macon City Lim · Structure no. 000000002150630

Built
2009
16 years old
Condition
Good
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
465 ft
4 main spans
Daily traffic
26,000
2024 count
Owner
State
State Highway Agency

About this bridge

I-475 Nbl over I-75 Sbl & Hart is a steel continuous stringer/multi-beam or girder carrying I-475 Nbl over I-75 Sbl & Hart in Bibb County, Georgia. It was built in 2009, so it is 16 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 26,000 vehicles a day, roughly 11% of them trucks, projected to reach 152,000 by 2030. The structure is 465 ft (141.7 m) long and 63 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-475 Nbl
CrossesI-75 Sbl & Hart
Location2 Mi. S of Macon City Lim
RouteInterstate 475
StateGeorgia
Coordinates32.75779, -83.70928
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.9 US tons
Inventory rating29 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length465 ft (141.7 m)
Longest span132 ft (40.2 m)
Deck width63 ft (19.3 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,000 (2024)
Projected traffic152,000 by 2030
Trucks11%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
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$3.5 million
NavigationNo navigation control on waterway

Frequently asked questions

When was I-475 Nbl over I-75 Sbl & Hart built?

It was built in 2009, making it 16 years old in 2025.

What condition is I-475 Nbl over I-75 Sbl & Hart 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 January 2024.

How much traffic does I-475 Nbl over I-75 Sbl & Hart carry?

About 26,000 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is I-475 Nbl over I-75 Sbl & Hart?

The structure is 465 ft (141.7 m) long with a longest span of 132 ft (40.2 m) and a deck 63 ft wide.

Who owns I-475 Nbl over I-75 Sbl & Hart?

It is owned by the State Highway Agency.