US Bridges

I-55/64/70 EB Cd " over UPRR

Fair

St. Clair County, Illinois · Pier H-1 to Abut H-5 · Structure no. 082025600000000

Built
1969
56 years old, rebuilt 1997
Condition
Fair
inspected February 2024
Type
Girder and Floorbeam System
Steel Continuous
Length
406 ft
4 main spans
Daily traffic
14,700
2024 count
Owner
State
State Highway Agency

About this bridge

I-55/64/70 EB Cd " over UPRR is a steel continuous girder and floorbeam system carrying I-55/64/70 EB Cd " over UPRR in St. Clair County, Illinois. It was built in 1969 and reconstructed in 1997, 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 14,700 vehicles a day, roughly 13% of them trucks, projected to reach 19,493 by 2046. The structure is 406 ft (123.7 m) long and 38 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-55/64/70 EB Cd "
CrossesUPRR
LocationPier H-1 to Abut H-5
CountySt. Clair County
StateIllinois
Coordinates38.61676, -90.16699
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating49.3 US tons
Inventory rating26.1 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length406 ft (123.7 m)
Longest span124 ft (37.8 m)
Deck width38 ft (11.7 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,700 (2024)
Projected traffic19,493 by 2046
Trucks13%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesRailroad
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$4.2 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-55/64/70 EB Cd " over UPRR built?

It was built in 1969, making it 56 years old in 2025. It was reconstructed in 1997.

What condition is I-55/64/70 EB Cd " over 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 February 2024.

How much traffic does I-55/64/70 EB Cd " over UPRR carry?

About 14,700 vehicles per day (2024 count), of which roughly 13% are trucks.

How long is I-55/64/70 EB Cd " over UPRR?

The structure is 406 ft (123.7 m) long with a longest span of 124 ft (37.8 m) and a deck 38 ft wide.

Who owns I-55/64/70 EB Cd " over UPRR?

It is owned by the State Highway Agency.