US Bridges

I-55/64; US 40 WB over 4th ST in E ST Lou

Fair

St. Clair County, Illinois · WB over 4th ST · Structure no. 082000800000000

Built
1965
60 years old, rebuilt 1994
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
227 ft
3 main spans
Daily traffic
30,700
2024 count
Owner
State
State Highway Agency

About this bridge

I-55/64; US 40 WB over 4th ST in E ST Lou is a steel continuous stringer/multi-beam or girder carrying I-55/64; US 40 WB over 4th ST in E ST Lou in St. Clair County, Illinois. It was built in 1965 and reconstructed in 1994, so it is 60 years old, older than the Illinois average of 45.3 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 30,700 vehicles a day, roughly 14% of them trucks, projected to reach 29,341 by 2046. The structure is 227 ft (69.1 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-55/64; US 40 WB
Crosses4th ST in E ST Lou
LocationWB over 4th ST
RouteInterstate 55
CountySt. Clair County
StateIllinois
Coordinates38.62195, -90.16519
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.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.7 US tons
Inventory rating45.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length227 ft (69.1 m)
Longest span90 ft (27.3 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,700 (2024)
Projected traffic29,341 by 2046
Trucks14%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-55/64; US 40 WB over 4th ST in E ST Lou built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1994.

What condition is I-55/64; US 40 WB over 4th ST in E ST Lou 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-55/64; US 40 WB over 4th ST in E ST Lou carry?

About 30,700 vehicles per day (2024 count), of which roughly 14% are trucks.

How long is I-55/64; US 40 WB over 4th ST in E ST Lou?

The structure is 227 ft (69.1 m) long with a longest span of 90 ft (27.3 m) and a deck 43 ft wide.

Who owns I-55/64; US 40 WB over 4th ST in E ST Lou?

It is owned by the State Highway Agency.