US Bridges

Michigan Ave over I- 55 Stevenson

Fair

Cook County, Illinois · 1 M E I-90 94 · Structure no. 016018400000000

Built
1965
60 years old, rebuilt 1994
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
215 ft
2 main spans
Daily traffic
7,200
2023 count
Owner
State
State Highway Agency

About this bridge

Michigan Ave over I- 55 Stevenson is a steel continuous stringer/multi-beam or girder carrying Michigan Ave over I- 55 Stevenson in Cook County, Illinois. It was built in 1965 and reconstructed in 1994, so it is 60 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 7,200 vehicles a day, roughly 7% of them trucks, projected to reach 9,393 by 2046. The structure is 215 ft (65.6 m) long and 80 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesMichigan Ave
CrossesI- 55 Stevenson
Location1 M E I-90 94
CountyCook County
StateIllinois
Coordinates41.84785, -87.62369
Functional classUrban Minor Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating65.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length215 ft (65.6 m)
Longest span83 ft (25.3 m)
Deck width80 ft (24.4 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,200 (2023)
Projected traffic9,393 by 2046
Trucks7%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$4.2 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Michigan Ave over I- 55 Stevenson built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1994.

What condition is Michigan Ave over I- 55 Stevenson 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 October 2024.

How much traffic does Michigan Ave over I- 55 Stevenson carry?

About 7,200 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Michigan Ave over I- 55 Stevenson?

The structure is 215 ft (65.6 m) long with a longest span of 83 ft (25.3 m) and a deck 80 ft wide.

Who owns Michigan Ave over I- 55 Stevenson?

It is owned by the State Highway Agency.