US Bridges

I-55 SB over Turkey Creek

Fair

McLean County, Illinois · 2.6MI N. Lexington · Structure no. 057017300000000

Built
1975
50 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete Continuous
Length
97 ft
3 main spans
Daily traffic
11,700
2023 count
Owner
State
State Highway Agency

About this bridge

I-55 SB over Turkey Creek is a concrete continuous slab carrying I-55 SB over Turkey Creek in McLean County, Illinois. It was built in 1975, so it is 50 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 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 11,700 vehicles a day, roughly 33% of them trucks, projected to reach 11,700 by 2046. The structure is 97 ft (29.6 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-55 SB
CrossesTurkey Creek
Location2.6MI N. Lexington
RouteInterstate 55
CountyMcLean County
StateIllinois
Coordinates40.66381, -88.77181
Functional classRural 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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 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 alignment8: Equal to present desirable criteria
Operating rating51.8 US tons
Inventory rating31.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length97 ft (29.6 m)
Longest span36 ft (11 m)
Deck width42 ft (12.8 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,700 (2023)
Projected traffic11,700 by 2046
Trucks33%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate 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-55 SB over Turkey Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is I-55 SB over Turkey Creek 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 August 2023.

How much traffic does I-55 SB over Turkey Creek carry?

About 11,700 vehicles per day (2023 count), of which roughly 33% are trucks.

How long is I-55 SB over Turkey Creek?

The structure is 97 ft (29.6 m) long with a longest span of 36 ft (11 m) and a deck 42 ft wide.

Who owns I-55 SB over Turkey Creek?

It is owned by the State Highway Agency.