US Bridges

US 129 Sbl/ Ramp over NS Railroad

Good

Bibb County, Georgia · 9 MI South of Macon · Structure no. 000000002150770

Built
2019
6 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
415 ft
3 main spans
Daily traffic
5,462
2024 count
Owner
State
State Highway Agency

About this bridge

US 129 Sbl/ Ramp over NS Railroad is a steel stringer/multi-beam or girder carrying US 129 Sbl/ Ramp over NS Railroad in Bibb County, Georgia. It was built in 2019, so it is 6 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 5,462 vehicles a day, roughly 4% of them trucks, projected to reach 7,125 by 2030. The structure is 415 ft (126.5 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 129 Sbl/ Ramp
CrossesNS Railroad
Location9 MI South of Macon
RouteU.S. Route 129
CountyBibb County
StateGeorgia
Coordinates32.68423, -83.63358
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89 US tons
Inventory rating52.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length415 ft (126.5 m)
Longest span185 ft (56.4 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,462 (2024)
Projected traffic7,125 by 2030
Trucks4%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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$55.3 million (2019 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 129 Sbl/ Ramp over NS Railroad built?

It was built in 2019, making it 6 years old in 2025.

What condition is US 129 Sbl/ Ramp over NS Railroad 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 November 2023.

How much traffic does US 129 Sbl/ Ramp over NS Railroad carry?

About 5,462 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is US 129 Sbl/ Ramp over NS Railroad?

The structure is 415 ft (126.5 m) long with a longest span of 185 ft (56.4 m) and a deck 30 ft wide.

Who owns US 129 Sbl/ Ramp over NS Railroad?

It is owned by the State Highway Agency.