US Bridges

Il 3 NB to EB Cd " over I-55/64 EB Cd "d" & UPRR

Fair

St. Clair County, Illinois · Pier P1 to Pier H1 · Structure no. 082020300000000

Built
1972
53 years old, rebuilt 2004
Condition
Fair
inspected March 2023
Type
Girder and Floorbeam System
Steel Continuous
Length
1,475 ft
15 main spans
Daily traffic
2,800
2024 count
Owner
State
State Highway Agency

About this bridge

Il 3 NB to EB Cd " over I-55/64 EB Cd "d" & UPRR is a steel continuous girder and floorbeam system carrying Il 3 NB to EB Cd " over I-55/64 EB Cd "d" & UPRR in St. Clair County, Illinois. It was built in 1972 and reconstructed in 2004, so it is 53 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 2,800 vehicles a day, roughly 20% of them trucks, projected to reach 3,384 by 2046. The structure is 1,475 ft (449.6 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesIl 3 NB to EB Cd "
CrossesI-55/64 EB Cd "d" & UPRR
LocationPier P1 to Pier H1
CountySt. Clair County
StateIllinois
Coordinates38.6133, -90.17119
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
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 geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment6: Equal to present minimum criteria
Operating rating53.6 US tons
Inventory rating31.4 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans15
Design loadHS 20 + Mod
Structure length1,475 ft (449.6 m)
Longest span122 ft (37.2 m)
Deck width28 ft (8.5 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,800 (2024)
Projected traffic3,384 by 2046
Trucks20%
Lanes on structure1
Traffic directionOne-way traffic
CarriesThird level (interchange)
CrossesHighway and railroad
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 Il 3 NB to EB Cd " over I-55/64 EB Cd "d" & UPRR built?

It was built in 1972, making it 53 years old in 2025. It was reconstructed in 2004.

What condition is Il 3 NB to EB Cd " over I-55/64 EB Cd "d" & 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 March 2023.

How much traffic does Il 3 NB to EB Cd " over I-55/64 EB Cd "d" & UPRR carry?

About 2,800 vehicles per day (2024 count), of which roughly 20% are trucks.

How long is Il 3 NB to EB Cd " over I-55/64 EB Cd "d" & UPRR?

The structure is 1,475 ft (449.6 m) long with a longest span of 122 ft (37.2 m) and a deck 28 ft wide.

Who owns Il 3 NB to EB Cd " over I-55/64 EB Cd "d" & UPRR?

It is owned by the State Highway Agency.