US Bridges

I-55 over Clear Creek

Fair

Logan County, Illinois · 1.5M N Atlanta Int · Structure no. 054201900000000

Built
1976
49 years old
Condition
Fair
inspected August 2024
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
21,600
2023 count
Owner
State
State Highway Agency

About this bridge

I-55 over Clear Creek is a concrete continuous culvert carrying I-55 over Clear Creek in Logan County, Illinois. It was built in 1976, so it is 49 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 5 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 21,600 vehicles a day, roughly 37% of them trucks, projected to reach 21,525 by 2046. The structure is 25 ft (7.7 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-55
CrossesClear Creek
Location1.5M N Atlanta Int
RouteInterstate 55
Coordinates40.28001, -89.20865
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
Channel and channel protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating87.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length25 ft (7.7 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,600 (2023)
Projected traffic21,525 by 2046
Trucks37%
Lanes on structure4
Traffic directionTwo-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 over Clear Creek built?

It was built in 1976, making it 49 years old in 2025.

What condition is I-55 over Clear 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 2024.

How much traffic does I-55 over Clear Creek carry?

About 21,600 vehicles per day (2023 count), of which roughly 37% are trucks.

How long is I-55 over Clear Creek?

The structure is 25 ft (7.7 m) long with a longest span of 11 ft (3.4 m).

Who owns I-55 over Clear Creek?

It is owned by the State Highway Agency.