US Bridges

I-55 SB over Kickapoo Creek

Fair

Logan County, Illinois · .5 N IL10 NW Lincoln · Structure no. 054004800000000

Built
1973
52 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
573 ft
5 main spans
Daily traffic
15,150
2023 count
Owner
State
State Highway Agency

About this bridge

I-55 SB over Kickapoo Creek is a steel continuous stringer/multi-beam or girder carrying I-55 SB over Kickapoo Creek in Logan County, Illinois. It was built in 1973, so it is 52 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 15,150 vehicles a day, roughly 30% of them trucks, projected to reach 11,970 by 2046. The structure is 573 ft (174.5 m) long and 58 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-55 SB
CrossesKickapoo Creek
Location.5 N IL10 NW Lincoln
RouteInterstate 55
CountyLogan County
StateIllinois
Coordinates40.16771, -89.41761
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating94.7 US tons
Inventory rating56.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length573 ft (174.5 m)
Longest span124 ft (37.9 m)
Deck width58 ft (17.7 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,150 (2023)
Projected traffic11,970 by 2046
Trucks30%
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 Kickapoo Creek built?

It was built in 1973, making it 52 years old in 2025.

What condition is I-55 SB over Kickapoo 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 Kickapoo Creek carry?

About 15,150 vehicles per day (2023 count), of which roughly 30% are trucks.

How long is I-55 SB over Kickapoo Creek?

The structure is 573 ft (174.5 m) long with a longest span of 124 ft (37.9 m) and a deck 58 ft wide.

Who owns I-55 SB over Kickapoo Creek?

It is owned by the State Highway Agency.