US Bridges

Ill 18 FAP 653 over I-39/US 51

Fair

LaSalle County, Illinois · 0.48 MI W of Il 251 · Structure no. 050021500000000

Built
1988
37 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
230 ft
3 main spans
Daily traffic
2,650
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 18 FAP 653 over I-39/US 51 is a steel continuous stringer/multi-beam or girder carrying Ill 18 FAP 653 over I-39/US 51 in LaSalle County, Illinois. It was built in 1988, so it is 37 years old, younger 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 2,650 vehicles a day, roughly 16% of them trucks, projected to reach 3,232 by 2046. The structure is 230 ft (70 m) long and 69 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesIll 18 FAP 653
CrossesI-39/US 51
Location0.48 MI W of Il 251
RouteState Highway 18
CountyLaSalle County
StateIllinois
Coordinates41.11909, -89.07518
Functional classRural Principal Arterial - Other

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating92.5 US tons
Inventory rating55.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length230 ft (70 m)
Longest span165 ft (50.4 m)
Deck width69 ft (21.1 m)
Roadway width61 ft (18.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,650 (2023)
Projected traffic3,232 by 2046
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.9 mi (3 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 Ill 18 FAP 653 over I-39/US 51 built?

It was built in 1988, making it 37 years old in 2025.

What condition is Ill 18 FAP 653 over I-39/US 51 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 2024.

How much traffic does Ill 18 FAP 653 over I-39/US 51 carry?

About 2,650 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is Ill 18 FAP 653 over I-39/US 51?

The structure is 230 ft (70 m) long with a longest span of 165 ft (50.4 m) and a deck 69 ft wide.

Who owns Ill 18 FAP 653 over I-39/US 51?

It is owned by the State Highway Agency.