US Bridges

I-55/64 WB Cd R-Li over UPRR

Poor

St. Clair County, Illinois · Pier G1 to Pier A21 · Structure no. 082025300000000

Built
1969
56 years old, rebuilt 1990
Condition
Poor
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
675 ft
6 main spans
Daily traffic
10,000
2024 count
Owner
State
State Highway Agency

About this bridge

I-55/64 WB Cd R-Li over UPRR is a steel continuous stringer/multi-beam or girder carrying I-55/64 WB Cd R-Li over UPRR 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 10,000 vehicles a day, roughly 16% of them trucks, projected to reach 16,867 by 2046. The structure is 675 ft (205.8 m) long and 39 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesI-55/64 WB Cd R-Li
CrossesUPRR
LocationPier G1 to Pier A21
CountySt. Clair County
StateIllinois
Coordinates38.62041, -90.1663
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.9 US tons
Inventory rating52.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length675 ft (205.8 m)
Longest span136 ft (41.5 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (10.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,000 (2024)
Projected traffic16,867 by 2046
Trucks16%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed3.1 mi (5 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 WB Cd R-Li over UPRR built?

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

What condition is I-55/64 WB Cd R-Li over UPRR in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2024.

How much traffic does I-55/64 WB Cd R-Li over UPRR carry?

About 10,000 vehicles per day (2024 count), of which roughly 16% are trucks.

How long is I-55/64 WB Cd R-Li over UPRR?

The structure is 675 ft (205.8 m) long with a longest span of 136 ft (41.5 m) and a deck 39 ft wide.

Who owns I-55/64 WB Cd R-Li over UPRR?

It is owned by the State Highway Agency.