US Bridges

I-55/64 EB Cd Q-Li over Ground

Fair

St. Clair County, Illinois · Pier D26 to Pier P14 · Structure no. 082025500000000

Built
1969
56 years old, rebuilt 1990
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
249 ft
3 main spans
Daily traffic
16,100
2024 count
Owner
State
State Highway Agency

About this bridge

I-55/64 EB Cd Q-Li over Ground is a steel continuous stringer/multi-beam or girder carrying I-55/64 EB Cd Q-Li over Ground in St. Clair County, Illinois. It was built in 1969 and reconstructed in 1990, so it is 56 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 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 16,100 vehicles a day, roughly 11% of them trucks, projected to reach 18,281 by 2046. The structure is 249 ft (75.9 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-55/64 EB Cd Q-Li
CrossesGround
LocationPier D26 to Pier P14
CountySt. Clair County
StateIllinois
Coordinates38.61619, -90.16772
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.7 US tons
Inventory rating48.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length249 ft (75.9 m)
Longest span98 ft (29.9 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,100 (2024)
Projected traffic18,281 by 2046
Trucks11%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
Detour if closed1.2 mi (2 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 EB Cd Q-Li over Ground built?

It was built in 1969, making it 56 years old in 2025. It was reconstructed in 1990.

What condition is I-55/64 EB Cd Q-Li over Ground 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 2024.

How much traffic does I-55/64 EB Cd Q-Li over Ground carry?

About 16,100 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is I-55/64 EB Cd Q-Li over Ground?

The structure is 249 ft (75.9 m) long with a longest span of 98 ft (29.9 m) and a deck 35 ft wide.

Who owns I-55/64 EB Cd Q-Li over Ground?

It is owned by the State Highway Agency.