US Bridges

Michigan Ave over Various City Sts

Fair

Cook County, Illinois · 100E 365N to 530N · Structure no. 016612000000000

Built
1920
105 years old, rebuilt 1991
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
1,111 ft
32 main spans
Daily traffic
24,300
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Michigan Ave over Various City Sts is a steel stringer/multi-beam or girder carrying Michigan Ave over Various City Sts in Cook County, Illinois. It was built in 1920 and reconstructed in 1991, so it is 105 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 24,300 vehicles a day, roughly 4% of them trucks, projected to reach 28,583 by 2046. The structure is 1,111 ft (338.6 m) long and 141 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesMichigan Ave
CrossesVarious City Sts
Location100E 365N to 530N
CountyCook County
StateIllinois
Coordinates41.8916, -87.62425
Functional classUrban Other Principal 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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 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 geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.5 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans32
Design loadHS 20
Structure length1,111 ft (338.6 m)
Longest span41 ft (12.5 m)
Deck width141 ft (43 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,300 (2023)
Projected traffic28,583 by 2046
Trucks4%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 Michigan Ave over Various City Sts built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1991.

What condition is Michigan Ave over Various City Sts 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 June 2024.

How much traffic does Michigan Ave over Various City Sts carry?

About 24,300 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Michigan Ave over Various City Sts?

The structure is 1,111 ft (338.6 m) long with a longest span of 41 ft (12.5 m) and a deck 141 ft wide.

Who owns Michigan Ave over Various City Sts?

It is owned by the City or Municipal Highway Agency.