US Bridges

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

Good

St. Clair County, Illinois · Pier BC1-> Abut B31 · Structure no. 082025200000000

Built
1995
30 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
2,992 ft
28 main spans
Daily traffic
30,700
2024 count
Owner
State
State Highway Agency

About this bridge

I-55/64WB Mainlne" over UPRR Il 3 Ramp UPRR UPRR is a steel continuous stringer/multi-beam or girder carrying I-55/64WB 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 30,700 vehicles a day, roughly 14% of them trucks, projected to reach 29,341 by 2046. The structure is 2,992 ft (912 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-55/64WB Mainlne"
CrossesUPRR Il 3 Ramp UPRR UPRR
LocationPier BC1-> Abut B31
RouteInterstate 55
CountySt. Clair County
StateIllinois
Coordinates38.61634, -90.17656
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
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 rating66.5 US tons
Inventory rating39.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans28
Design loadHS 20
Structure length2,992 ft (912 m)
Longest span138 ft (42.1 m)
Deck width33 ft (10.2 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,700 (2024)
Projected traffic29,341 by 2046
Trucks14%
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$149.9 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-55/64WB 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-55/64WB Mainlne" over UPRR Il 3 Ramp UPRR UPRR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.

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

About 30,700 vehicles per day (2024 count), of which roughly 14% are trucks.

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

The structure is 2,992 ft (912 m) long with a longest span of 138 ft (42.1 m) and a deck 33 ft wide.

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

It is owned by the State Highway Agency.