US Bridges

I-90 Skyway EB over 87th ST

Fair

Cook County, Illinois · 0.1 M W S Chgo Ave P · Structure no. 016640800000000

Built
1958
67 years old, rebuilt 2006
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
128 ft
1 main span
Daily traffic
14,350
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

I-90 Skyway EB over 87th ST is a steel stringer/multi-beam or girder carrying I-90 Skyway EB over 87th ST in Cook County, Illinois. It was built in 1958 and reconstructed in 2006, 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 128 ft (39.1 m) long and 51 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesI-90 Skyway EB
Crosses87th ST
Location0.1 M W S Chgo Ave P
RouteInterstate 90
CountyCook County
StateIllinois
Coordinates41.73728, -87.56862
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.6 US tons
Inventory rating47.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length128 ft (39.1 m)
Longest span125 ft (38 m)
Deck width51 ft (15.4 m)
Roadway width47 ft (14.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,350 (2020)
Projected traffic14,494 by 2046
Trucks16%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.8 mi (11 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-90 Skyway EB over 87th ST built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 2006.

What condition is I-90 Skyway EB over 87th ST 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-90 Skyway EB over 87th ST carry?

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

How long is I-90 Skyway EB over 87th ST?

The structure is 128 ft (39.1 m) long with a longest span of 125 ft (38 m) and a deck 51 ft wide.

Who owns I-90 Skyway EB over 87th ST?

It is owned by the City or Municipal Highway Agency.