US Bridges

US 129 Sbl over NS Railroad

Fair

Bibb County, Georgia · 2.9 MI S of Macon Cty Lmt · Structure no. 000000002100580

Built
1941
84 years old
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
152 ft
3 main spans
Daily traffic
3,490
2024 count
Owner
State
State Highway Agency

About this bridge

US 129 Sbl over NS Railroad is a steel stringer/multi-beam or girder carrying US 129 Sbl over NS Railroad in Bibb County, Georgia. It was built in 1941, so it is 84 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 3,490 vehicles a day, roughly 7% of them trucks, projected to reach 34,290 by 2031. The structure is 152 ft (46.3 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 129 Sbl
CrossesNS Railroad
Location2.9 MI S of Macon Cty Lmt
RouteU.S. Route 129
CountyBibb County
StateGeorgia
Coordinates32.71976, -83.65121
Functional classUrban Minor Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.9 US tons
Inventory rating31 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length152 ft (46.3 m)
Longest span68 ft (20.7 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,490 (2024)
Projected traffic34,290 by 2031
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkSTRAHNET connector

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$891,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 129 Sbl over NS Railroad built?

It was built in 1941, making it 84 years old in 2025.

What condition is US 129 Sbl over NS Railroad 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 February 2025.

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

About 3,490 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is US 129 Sbl over NS Railroad?

The structure is 152 ft (46.3 m) long with a longest span of 68 ft (20.7 m) and a deck 28 ft wide.

Who owns US 129 Sbl over NS Railroad?

It is owned by the State Highway Agency.