US Bridges

91st ST over I- 94 Ryan & Cta

Fair

Cook County, Illinois · 0.5 M N US 12 · Structure no. 016114100000000

Built
1958
67 years old, rebuilt 2004
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
214 ft
3 main spans
Daily traffic
2,750
2022 count
Owner
State
State Highway Agency

About this bridge

91st ST over I- 94 Ryan & Cta is a steel continuous stringer/multi-beam or girder carrying 91st ST over I- 94 Ryan & Cta in Cook County, Illinois. It was built in 1958 and reconstructed in 2004, 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 2,750 vehicles a day, roughly 4% of them trucks, projected to reach 2,424 by 2046. The structure is 214 ft (65.2 m) long and 71 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries91st ST
CrossesI- 94 Ryan & Cta
Location0.5 M N US 12
RouteCity Street 0
CountyCook County
StateIllinois
Coordinates41.72911, -87.62068
Functional classUrban Local

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than 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 rating98.2 US tons
Inventory rating45.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length214 ft (65.2 m)
Longest span84 ft (25.5 m)
Deck width71 ft (21.7 m)
Roadway width54 ft (16.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,750 (2022)
Projected traffic2,424 by 2046
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
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$3.2 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was 91st ST over I- 94 Ryan & Cta built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 2004.

What condition is 91st ST over I- 94 Ryan & Cta 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 September 2024.

How much traffic does 91st ST over I- 94 Ryan & Cta carry?

About 2,750 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is 91st ST over I- 94 Ryan & Cta?

The structure is 214 ft (65.2 m) long with a longest span of 84 ft (25.5 m) and a deck 71 ft wide.

Who owns 91st ST over I- 94 Ryan & Cta?

It is owned by the State Highway Agency.