US Bridges

18th ST over Southern Railroad

Good

Walker County, Alabama · 18th ST * Sou RR · Structure no. 010306

Built
1970
55 years old
Condition
Good
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
156 ft
3 main spans
Daily traffic
7,500
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

18th ST over Southern Railroad is a steel stringer/multi-beam or girder carrying 18th ST over Southern Railroad in Walker County, Alabama. It was built in 1970, so it is 55 years old, older than the Alabama average of 51.1 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 7,500 vehicles a day, roughly 1% of them trucks, projected to reach 10,000 by 2044. The structure is 156 ft (47.5 m) long and 68 ft wide.

Carries18th ST
CrossesSouthern Railroad
Location18th ST * Sou RR
RouteCity Street 0
StateAlabama
Coordinates33.76667, -87.26667
Functional classUrban Local

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 inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.2 US tons
Inventory rating35.5 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length156 ft (47.5 m)
Longest span52 ft (15.8 m)
Deck width68 ft (20.8 m)
Roadway width61 ft (18.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,500 (2024)
Projected traffic10,000 by 2044
Trucks1%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$3 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was 18th ST over Southern Railroad built?

It was built in 1970, making it 55 years old in 2025.

What condition is 18th ST over Southern 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 January 2024.

How much traffic does 18th ST over Southern Railroad carry?

About 7,500 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is 18th ST over Southern Railroad?

The structure is 156 ft (47.5 m) long with a longest span of 52 ft (15.8 m) and a deck 68 ft wide.

Who owns 18th ST over Southern Railroad?

It is owned by the City or Municipal Highway Agency.