US Bridges

ST Clair Avenue over I-55/64; US 40 EB

Fair

St. Clair County, Illinois · N of Collinsville Av · Structure no. 082009900000000

Built
1961
64 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
178 ft
2 main spans
Daily traffic
4,300
2023 count
Owner
State
State Highway Agency

About this bridge

ST Clair Avenue over I-55/64; US 40 EB is a steel continuous stringer/multi-beam or girder carrying ST Clair Avenue over I-55/64; US 40 EB in St. Clair County, Illinois. It was built in 1961, so it is 64 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 4,300 vehicles a day, roughly 16% of them trucks, projected to reach 4,293 by 2046. The structure is 178 ft (54.3 m) long and 87 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesST Clair Avenue
CrossesI-55/64; US 40 EB
LocationN of Collinsville Av
RouteState Highway 3
CountySt. Clair County
StateIllinois
Coordinates38.63299, -90.14629
Functional classUrban Minor Arterial

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 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 alignment6: Equal to present minimum criteria
Operating rating54.2 US tons
Inventory rating32.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length178 ft (54.3 m)
Longest span88 ft (26.8 m)
Deck width87 ft (26.5 m)
Roadway width76 ft (23.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,300 (2023)
Projected traffic4,293 by 2046
Trucks16%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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 ST Clair Avenue over I-55/64; US 40 EB built?

It was built in 1961, making it 64 years old in 2025.

What condition is ST Clair Avenue over I-55/64; US 40 EB 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 ST Clair Avenue over I-55/64; US 40 EB carry?

About 4,300 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is ST Clair Avenue over I-55/64; US 40 EB?

The structure is 178 ft (54.3 m) long with a longest span of 88 ft (26.8 m) and a deck 87 ft wide.

Who owns ST Clair Avenue over I-55/64; US 40 EB?

It is owned by the State Highway Agency.