US Bridges

I-90 over Stream

Good

Boone County, Illinois · 0.7 MI W Mchenry CO · Structure no. 004995000000000

Built
1958
67 years old
Condition
Good
inspected July 2023
Type
Culvert
Concrete
Length
28 ft
2 main spans
Daily traffic
28,000
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

I-90 over Stream is a concrete culvert carrying I-90 over Stream in Boone 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 28,000 vehicles a day, roughly 24% of them trucks, projected to reach 23,296 by 2046. The structure is 28 ft (8.4 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-90
CrossesStream
Location0.7 MI W Mchenry CO
RouteInterstate 90
CountyBoone County
StateIllinois
Coordinates42.21038, -88.71856
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating74.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length28 ft (8.4 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,000 (2023)
Projected traffic23,296 by 2046
Trucks24%
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 Stream built?

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

What condition is I-90 over Stream 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 July 2023.

How much traffic does I-90 over Stream carry?

About 28,000 vehicles per day (2023 count), of which roughly 24% are trucks.

How long is I-90 over Stream?

The structure is 28 ft (8.4 m) long with a longest span of 12 ft (3.7 m).

Who owns I-90 over Stream?

It is owned by the State Toll Authority.