US Bridges

I-39 NB over I-55 & CD#2284/2287

Fair

McLean County, Illinois · 0.29 MI W of Old 51 · Structure no. 057021500000000

Built
1989
36 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
275 ft
2 main spans
Daily traffic
6,750
2023 count
Owner
State
State Highway Agency

About this bridge

I-39 NB over I-55 & CD#2284/2287 is a steel continuous stringer/multi-beam or girder carrying I-39 NB over I-55 & CD#2284/2287 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 6,750 vehicles a day, roughly 46% of them trucks, projected to reach 6,969 by 2046. The structure is 275 ft (83.7 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-39 NB
CrossesI-55 & CD#2284/2287
Location0.29 MI W of Old 51
RouteInterstate 39
CountyMcLean County
StateIllinois
Coordinates40.53893, -89.00312
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79.3 US tons
Inventory rating47.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length275 ft (83.7 m)
Longest span115 ft (35.2 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,750 (2023)
Projected traffic6,969 by 2046
Trucks46%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-39 NB over I-55 & CD#2284/2287 built?

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

What condition is I-39 NB over I-55 & CD#2284/2287 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 I-39 NB over I-55 & CD#2284/2287 carry?

About 6,750 vehicles per day (2023 count), of which roughly 46% are trucks.

How long is I-39 NB over I-55 & CD#2284/2287?

The structure is 275 ft (83.7 m) long with a longest span of 115 ft (35.2 m) and a deck 43 ft wide.

Who owns I-39 NB over I-55 & CD#2284/2287?

It is owned by the State Highway Agency.