US Bridges

I-55/64 WB Cd over 4th ST in E ST Louis

Fair

St. Clair County, Illinois · WB Cd over 4th ST · Structure no. 082020600000000

Built
1965
60 years old, rebuilt 1990
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
221 ft
3 main spans
Daily traffic
9,100
2024 count
Owner
State
State Highway Agency

About this bridge

I-55/64 WB Cd over 4th ST in E ST Louis is a steel continuous stringer/multi-beam or girder carrying I-55/64 WB Cd over 4th ST in E ST Louis in St. Clair County, Illinois. It was built in 1965 and reconstructed in 1990, 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 9,100 vehicles a day, roughly 18% of them trucks, projected to reach 18,281 by 2046. The structure is 221 ft (67.4 m) long and 60 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesI-55/64 WB Cd
Crosses4th ST in E ST Louis
LocationWB Cd over 4th ST
CountySt. Clair County
StateIllinois
Coordinates38.62214, -90.16587
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
Deck7 GoodSome minor problems.
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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.6 US tons
Inventory rating53.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length221 ft (67.4 m)
Longest span90 ft (27.3 m)
Deck width60 ft (18.4 m)
Roadway width57 ft (17.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,100 (2024)
Projected traffic18,281 by 2046
Trucks18%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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 WB Cd over 4th ST in E ST Louis built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1990.

What condition is I-55/64 WB Cd over 4th ST in E ST Louis 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 WB Cd over 4th ST in E ST Louis carry?

About 9,100 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is I-55/64 WB Cd over 4th ST in E ST Louis?

The structure is 221 ft (67.4 m) long with a longest span of 90 ft (27.3 m) and a deck 60 ft wide.

Who owns I-55/64 WB Cd over 4th ST in E ST Louis?

It is owned by the State Highway Agency.