US Bridges

I-90 Skyway over Colfax Ave

Fair

Cook County, Illinois · At 90th P8C · Structure no. 016601800000000

Built
1958
67 years old, rebuilt 2007
Condition
Fair
inspected August 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
86 ft
1 main span
Daily traffic
14,350
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

I-90 Skyway over Colfax Ave is a steel stringer/multi-beam or girder carrying I-90 Skyway over Colfax Ave in Cook County, Illinois. It was built in 1958 and reconstructed in 2007, 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 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 14,350 vehicles a day, roughly 16% of them trucks, projected to reach 14,494 by 2046. The structure is 86 ft (26.2 m) long and 106 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesI-90 Skyway
CrossesColfax Ave
LocationAt 90th P8C
RouteInterstate 90
CountyCook County
StateIllinois
Coordinates41.73203, -87.56111
Functional classUrban 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.
Last inspectionAugust 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length86 ft (26.2 m)
Longest span82 ft (25 m)
Deck width106 ft (32.3 m)
Roadway width100 ft (30.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,350 (2020)
Projected traffic14,494 by 2046
Trucks16%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a toll road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$178,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-90 Skyway over Colfax Ave built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 2007.

What condition is I-90 Skyway over Colfax Ave 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 2022.

How much traffic does I-90 Skyway over Colfax Ave carry?

About 14,350 vehicles per day (2020 count), of which roughly 16% are trucks.

How long is I-90 Skyway over Colfax Ave?

The structure is 86 ft (26.2 m) long with a longest span of 82 ft (25 m) and a deck 106 ft wide.

Who owns I-90 Skyway over Colfax Ave?

It is owned by the City or Municipal Highway Agency.