US Bridges

TR 559A over W Fork Salt Creek

Good

McLean County, Illinois · S Edge of Leroy · Structure no. 057441100000000

Built
1968
57 years old
Condition
Good
inspected September 2023
Type
Slab
Concrete Continuous
Length
98 ft
3 main spans
Daily traffic
75
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 559A over W Fork Salt Creek is a concrete continuous slab carrying TR 559A over W Fork Salt Creek in McLean County, Illinois. It was built in 1968, so it is 57 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 75 vehicles a day, roughly 3% of them trucks, projected to reach 76 by 2046. The structure is 98 ft (29.9 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesTR 559A
CrossesW Fork Salt Creek
LocationS Edge of Leroy
RouteCounty Highway 0
Coordinates40.32117, -88.76449
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating47.8 US tons
Inventory rating28.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length98 ft (29.9 m)
Longest span37 ft (11.3 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2024)
Projected traffic76 by 2046
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was TR 559A over W Fork Salt Creek built?

It was built in 1968, making it 57 years old in 2025.

What condition is TR 559A over W Fork Salt Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does TR 559A over W Fork Salt Creek carry?

About 75 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is TR 559A over W Fork Salt Creek?

The structure is 98 ft (29.9 m) long with a longest span of 37 ft (11.3 m) and a deck 28 ft wide.

Who owns TR 559A over W Fork Salt Creek?

It is owned by the Town or Township Highway Agency.