US Bridges

I - 20 West over City ST * 1st Ave So

Fair

Jefferson County, Alabama · I 20 * 1st Ave So · Structure no. 011060

Built
1974
51 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
238 ft
3 main spans
Daily traffic
30,680
2024 count
Owner
State
State Highway Agency

About this bridge

I - 20 West over City ST * 1st Ave So is a steel stringer/multi-beam or girder carrying I - 20 West over City ST * 1st Ave So 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 5 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 30,680 vehicles a day, roughly 14% of them trucks, projected to reach 37,066 by 2044. The structure is 238 ft (72.5 m) long and 41 ft wide.

Location

Open in Google Maps
CarriesI - 20 West
CrossesCity ST * 1st Ave So
LocationI 20 * 1st Ave So
RouteInterstate 20
CountyJefferson County
StateAlabama
Coordinates33.5458, -86.7426
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.3 US tons
Inventory rating54.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length238 ft (72.5 m)
Longest span110 ft (33.6 m)
Deck width41 ft (12.4 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,680 (2024)
Projected traffic37,066 by 2044
Trucks14%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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$2.5 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I - 20 West over City ST * 1st Ave So built?

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

What condition is I - 20 West over City ST * 1st Ave So 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 June 2024.

How much traffic does I - 20 West over City ST * 1st Ave So carry?

About 30,680 vehicles per day (2024 count), of which roughly 14% are trucks.

How long is I - 20 West over City ST * 1st Ave So?

The structure is 238 ft (72.5 m) long with a longest span of 110 ft (33.6 m) and a deck 41 ft wide.

Who owns I - 20 West over City ST * 1st Ave So?

It is owned by the State Highway Agency.