US Bridges

I-55/64EB Mainlne" over UPRR Il 3 Ramp UPRR UPRR

Fair

St. Clair County, Illinois · Pier BC1 to Abut C31 · Structure no. 082025100000000

Built
1995
30 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
3,080 ft
28 main spans
Daily traffic
56,600
2024 count
Owner
State
State Highway Agency

About this bridge

I-55/64EB Mainlne" over UPRR Il 3 Ramp UPRR UPRR is a steel continuous stringer/multi-beam or girder carrying I-55/64EB Mainlne" over UPRR Il 3 Ramp UPRR UPRR in St. Clair County, Illinois. It was built in 1995, so it is 30 years old, younger 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 56,600 vehicles a day, roughly 13% of them trucks, projected to reach 59,439 by 2046. The structure is 3,080 ft (938.8 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-55/64EB Mainlne"
CrossesUPRR Il 3 Ramp UPRR UPRR
LocationPier BC1 to Abut C31
RouteInterstate 55
CountySt. Clair County
StateIllinois
Coordinates38.61639, -90.17676
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than 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 rating64.3 US tons
Inventory rating38.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans28
Design loadHS 20
Structure length3,080 ft (938.8 m)
Longest span138 ft (42.1 m)
Deck width34 ft (10.5 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic56,600 (2024)
Projected traffic59,439 by 2046
Trucks13%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway and railroad
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$159.8 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-55/64EB Mainlne" over UPRR Il 3 Ramp UPRR UPRR built?

It was built in 1995, making it 30 years old in 2025.

What condition is I-55/64EB Mainlne" over UPRR Il 3 Ramp UPRR UPRR 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 December 2024.

How much traffic does I-55/64EB Mainlne" over UPRR Il 3 Ramp UPRR UPRR carry?

About 56,600 vehicles per day (2024 count), of which roughly 13% are trucks.

How long is I-55/64EB Mainlne" over UPRR Il 3 Ramp UPRR UPRR?

The structure is 3,080 ft (938.8 m) long with a longest span of 138 ft (42.1 m) and a deck 34 ft wide.

Who owns I-55/64EB Mainlne" over UPRR Il 3 Ramp UPRR UPRR?

It is owned by the State Highway Agency.