US Bridges

I-90 over S Kinnikinnick Creek

Good

Winnebago County, Illinois · 1 MI E of Roscoe · Structure no. 101995300000000

Built
1958
67 years old
Condition
Good
inspected June 2023
Type
Culvert
Steel
Length
74 ft
5 main spans
Daily traffic
29,400
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

I-90 over S Kinnikinnick Creek is a steel culvert carrying I-90 over S Kinnikinnick Creek in Winnebago County, Illinois. It was built in 1958, so it is 67 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 29,400 vehicles a day, roughly 29% of them trucks, projected to reach 23,634 by 2046. The structure is 74 ft (22.7 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-90
CrossesS Kinnikinnick Creek
Location1 MI E of Roscoe
RouteInterstate 39
CountyWinnebago County
StateIllinois
Coordinates42.41447, -88.98567
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating98.2 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans5
Design loadHS 20
Structure length74 ft (22.7 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 traffic29,400 (2023)
Projected traffic23,634 by 2046
Trucks29%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a toll road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
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-90 over S Kinnikinnick Creek built?

It was built in 1958, making it 67 years old in 2025.

What condition is I-90 over S Kinnikinnick Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.

How much traffic does I-90 over S Kinnikinnick Creek carry?

About 29,400 vehicles per day (2023 count), of which roughly 29% are trucks.

How long is I-90 over S Kinnikinnick Creek?

The structure is 74 ft (22.7 m) long with a longest span of 11 ft (3.4 m).

Who owns I-90 over S Kinnikinnick Creek?

It is owned by the State Toll Authority.