US Bridges

FAI 64 WB over 18th ST

Fair

St. Clair County, Illinois · 0.22 E of 18th ST · Structure no. 082015300000000

Built
1974
51 years old
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
140 ft
3 main spans
Daily traffic
37,250
2023 count
Owner
State
State Highway Agency

About this bridge

FAI 64 WB over 18th ST is a steel continuous stringer/multi-beam or girder carrying FAI 64 WB over 18th ST in St. Clair County, Illinois. It was built in 1974, so it is 51 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 37,250 vehicles a day, roughly 13% of them trucks, projected to reach 41,865 by 2046. The structure is 140 ft (42.8 m) long and 56 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesFAI 64 WB
Crosses18th ST
Location0.22 E of 18th ST
RouteInterstate 64
Coordinates38.62517, -90.13529
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81 US tons
Inventory rating43.5 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length140 ft (42.8 m)
Longest span60 ft (18.4 m)
Deck width56 ft (17.2 m)
Roadway width53 ft (16.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37,250 (2023)
Projected traffic41,865 by 2046
Trucks13%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was FAI 64 WB over 18th ST built?

It was built in 1974, making it 51 years old in 2025.

What condition is FAI 64 WB over 18th ST 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 2025.

How much traffic does FAI 64 WB over 18th ST carry?

About 37,250 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is FAI 64 WB over 18th ST?

The structure is 140 ft (42.8 m) long with a longest span of 60 ft (18.4 m) and a deck 56 ft wide.

Who owns FAI 64 WB over 18th ST?

It is owned by the State Highway Agency.