US Bridges

TR 157A over I-39/US 51 Substa RD

Fair

McLean County, Illinois · 2.5 MI N of I-55 · Structure no. 057021200000000

Built
1989
36 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
229 ft
3 main spans
Daily traffic
375
2024 count
Owner
State
State Highway Agency

About this bridge

TR 157A over I-39/US 51 Substa RD is a steel continuous stringer/multi-beam or girder carrying TR 157A over I-39/US 51 Substa RD in McLean County, Illinois. It was built in 1989, so it is 36 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 6 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 375 vehicles a day, roughly 20% of them trucks, projected to reach 253 by 2046. The structure is 229 ft (69.8 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesTR 157A
CrossesI-39/US 51 Substa RD
Location2.5 MI N of I-55
RouteCounty Highway 0
CountyMcLean County
StateIllinois
Coordinates40.57633, -89.00263
Functional classRural Minor 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.5 US tons
Inventory rating44.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length229 ft (69.8 m)
Longest span165 ft (50.3 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic375 (2024)
Projected traffic253 by 2046
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was TR 157A over I-39/US 51 Substa RD built?

It was built in 1989, making it 36 years old in 2025.

What condition is TR 157A over I-39/US 51 Substa RD 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 May 2023.

How much traffic does TR 157A over I-39/US 51 Substa RD carry?

About 375 vehicles per day (2024 count), of which roughly 20% are trucks.

How long is TR 157A over I-39/US 51 Substa RD?

The structure is 229 ft (69.8 m) long with a longest span of 165 ft (50.3 m) and a deck 31 ft wide.

Who owns TR 157A over I-39/US 51 Substa RD?

It is owned by the State Highway Agency.