US Bridges

I - 20/59 West over Ramp C

Fair

Jefferson County, Alabama · I - 20/59 & Al - 79 · Structure no. 010866

Built
1973
52 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
161 ft
3 main spans
Daily traffic
14,040
2024 count
Owner
State
State Highway Agency

About this bridge

I - 20/59 West over Ramp C is a steel stringer/multi-beam or girder carrying I - 20/59 West over Ramp C in Jefferson County, Alabama. It was built in 1973, so it is 52 years old, older 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 14,040 vehicles a day, roughly 11% of them trucks, projected to reach 17,370 by 2044. The structure is 161 ft (49.1 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI - 20/59 West
CrossesRamp C
LocationI - 20/59 & Al - 79
RouteInterstate 20
StateAlabama
Coordinates33.54944, -86.77861
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 inspectionMarch 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 alignment7: Better than present minimum criteria
Operating rating83.6 US tons
Inventory rating50 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length161 ft (49.1 m)
Longest span77 ft (23.5 m)
Deck width41 ft (12.5 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,040 (2024)
Projected traffic17,370 by 2044
Trucks11%
Lanes on structure2
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 NetworkSTRAHNET connector

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$1.8 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I - 20/59 West over Ramp C built?

It was built in 1973, making it 52 years old in 2025.

What condition is I - 20/59 West over Ramp C 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 I - 20/59 West over Ramp C carry?

About 14,040 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is I - 20/59 West over Ramp C?

The structure is 161 ft (49.1 m) long with a longest span of 77 ft (23.5 m) and a deck 41 ft wide.

Who owns I - 20/59 West over Ramp C?

It is owned by the State Highway Agency.