US Bridges

I-64 EB over Trra

Fair

St. Clair County, Illinois · 0.3MI W of 25th St. · Structure no. 082015800000000

Built
1968
57 years old, rebuilt 1995
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
176 ft
3 main spans
Daily traffic
37,900
2023 count
Owner
State
State Highway Agency

About this bridge

I-64 EB over Trra is a steel continuous stringer/multi-beam or girder carrying I-64 EB over Trra in St. Clair County, Illinois. It was built in 1968 and reconstructed in 1995, so it is 57 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 37,900 vehicles a day, roughly 13% of them trucks, projected to reach 41,713 by 2046. The structure is 176 ft (53.6 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-64 EB
CrossesTrra
Location0.3MI W of 25th St.
RouteInterstate 64
CountySt. Clair County
StateIllinois
Coordinates38.62312, -90.129
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.5 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length176 ft (53.6 m)
Longest span62 ft (18.9 m)
Deck width48 ft (14.6 m)
Roadway width45 ft (13.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37,900 (2023)
Projected traffic41,713 by 2046
Trucks13%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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-64 EB over Trra built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 1995.

What condition is I-64 EB over Trra 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 February 2023.

How much traffic does I-64 EB over Trra carry?

About 37,900 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is I-64 EB over Trra?

The structure is 176 ft (53.6 m) long with a longest span of 62 ft (18.9 m) and a deck 48 ft wide.

Who owns I-64 EB over Trra?

It is owned by the State Highway Agency.