US Bridges

I - 59 South over I 20 Ramp a * B

Fair

Jefferson County, Alabama · I 59 * I 20 Inter · Structure no. 011089

Built
1974
51 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
292 ft
4 main spans
Daily traffic
38,900
2024 count
Owner
State
State Highway Agency

About this bridge

I - 59 South over I 20 Ramp a * B is a steel continuous stringer/multi-beam or girder carrying I - 59 South over I 20 Ramp a * B in Jefferson County, Alabama. It was built in 1974, so it is 51 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 38,900 vehicles a day, roughly 8% of them trucks, projected to reach 48,127 by 2044. The structure is 292 ft (89 m) long and 65 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI - 59 South
CrossesI 20 Ramp a * B
LocationI 59 * I 20 Inter
RouteInterstate 59
StateAlabama
Coordinates33.5474, -86.7497
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.8 US tons
Inventory rating41.2 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length292 ft (89 m)
Longest span85 ft (25.9 m)
Deck width65 ft (19.7 m)
Roadway width63 ft (19.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic38,900 (2024)
Projected traffic48,127 by 2044
Trucks8%
Lanes on structure3
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
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$4.8 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I - 59 South over I 20 Ramp a * B built?

It was built in 1974, making it 51 years old in 2025.

What condition is I - 59 South over I 20 Ramp a * B 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 April 2024.

How much traffic does I - 59 South over I 20 Ramp a * B carry?

About 38,900 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is I - 59 South over I 20 Ramp a * B?

The structure is 292 ft (89 m) long with a longest span of 85 ft (25.9 m) and a deck 65 ft wide.

Who owns I - 59 South over I 20 Ramp a * B?

It is owned by the State Highway Agency.