US Bridges

Viaduct RD over B-N * N-S RR South ST

Fair

Mobile County, Alabama · 0.2 MI E US 43 · Structure no. 018250

Built
2001
24 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
457 ft
6 main spans
Daily traffic
707
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Viaduct RD over B-N * N-S RR South ST is a steel continuous stringer/multi-beam or girder carrying Viaduct RD over B-N * N-S RR South ST in Mobile County, Alabama. It was built in 2001, so it is 24 years old, younger than the Alabama average of 51.1 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 707 vehicles a day, roughly 33% of them trucks, projected to reach 1,061 by 2044. The structure is 457 ft (139.3 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesViaduct RD
CrossesB-N * N-S RR South ST
Location0.2 MI E US 43
RouteCity Street 0
CountyMobile County
StateAlabama
Coordinates30.76389, -88.07328
Functional classUrban Local

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.1 US tons
Inventory rating42.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length457 ft (139.3 m)
Longest span88 ft (26.8 m)
Deck width36 ft (11 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic707 (2024)
Projected traffic1,061 by 2044
Trucks33%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and railroad
Detour if closed1.2 mi (2 km)
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$4 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Viaduct RD over B-N * N-S RR South ST built?

It was built in 2001, making it 24 years old in 2025.

What condition is Viaduct RD over B-N * N-S RR South ST 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 March 2024.

How much traffic does Viaduct RD over B-N * N-S RR South ST carry?

About 707 vehicles per day (2024 count), of which roughly 33% are trucks.

How long is Viaduct RD over B-N * N-S RR South ST?

The structure is 457 ft (139.3 m) long with a longest span of 88 ft (26.8 m) and a deck 36 ft wide.

Who owns Viaduct RD over B-N * N-S RR South ST?

It is owned by the City or Municipal Highway Agency.