US Bridges

FAS 1478 over I-74 at Leroy

Fair

McLean County, Illinois · 13.63 MI E of US 51 · Structure no. 057013200000000

Built
1970
55 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
225 ft
2 main spans
Daily traffic
6,150
2024 count
Owner
State
State Highway Agency

About this bridge

FAS 1478 over I-74 at Leroy is a steel continuous stringer/multi-beam or girder carrying FAS 1478 over I-74 at Leroy in McLean County, Illinois. It was built in 1970, so it is 55 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 6,150 vehicles a day, roughly 16% of them trucks, projected to reach 5,202 by 2046. The structure is 225 ft (68.7 m) long and 68 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesFAS 1478
CrossesI-74 at Leroy
Location13.63 MI E of US 51
RouteCounty Highway 0
CountyMcLean County
StateIllinois
Coordinates40.33854, -88.76517
Functional classRural Major Collector

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 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 rating68.6 US tons
Inventory rating41.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length225 ft (68.7 m)
Longest span91 ft (27.7 m)
Deck width68 ft (20.7 m)
Roadway width48 ft (14.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,150 (2024)
Projected traffic5,202 by 2046
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

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 FAS 1478 over I-74 at Leroy built?

It was built in 1970, making it 55 years old in 2025.

What condition is FAS 1478 over I-74 at Leroy 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 April 2024.

How much traffic does FAS 1478 over I-74 at Leroy carry?

About 6,150 vehicles per day (2024 count), of which roughly 16% are trucks.

How long is FAS 1478 over I-74 at Leroy?

The structure is 225 ft (68.7 m) long with a longest span of 91 ft (27.7 m) and a deck 68 ft wide.

Who owns FAS 1478 over I-74 at Leroy?

It is owned by the State Highway Agency.