US Bridges

I-459 South over Seaboard Coast Linerr

Fair

Jefferson County, Alabama · I459 * Seaboard Coastlnrr · Structure no. 012102

Built
1979
46 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
174 ft
3 main spans
Daily traffic
28,675
2023 count
Owner
State
State Highway Agency

About this bridge

I-459 South over Seaboard Coast Linerr is a steel continuous stringer/multi-beam or girder carrying I-459 South over Seaboard Coast Linerr in Jefferson County, Alabama. It was built in 1979, so it is 46 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 28,675 vehicles a day, roughly 12% of them trucks, projected to reach 36,257 by 2043. The structure is 174 ft (53 m) long and 59 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-459 South
CrossesSeaboard Coast Linerr
LocationI459 * Seaboard Coastlnrr
RouteInterstate 459
CountyJefferson County
StateAlabama
Coordinates33.57866, -86.64028
Functional classUrban Principal Arterial - Interstate

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 inspectionMay 2023
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 alignment8: Equal to present desirable criteria
Operating rating64.9 US tons
Inventory rating34.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length174 ft (53 m)
Longest span65 ft (19.8 m)
Deck width59 ft (17.9 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,675 (2023)
Projected traffic36,257 by 2043
Trucks12%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.8 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-459 South over Seaboard Coast Linerr built?

It was built in 1979, making it 46 years old in 2025.

What condition is I-459 South over Seaboard Coast Linerr 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 May 2023.

How much traffic does I-459 South over Seaboard Coast Linerr carry?

About 28,675 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is I-459 South over Seaboard Coast Linerr?

The structure is 174 ft (53 m) long with a longest span of 65 ft (19.8 m) and a deck 59 ft wide.

Who owns I-459 South over Seaboard Coast Linerr?

It is owned by the State Highway Agency.