US Bridges

59th ST over I- 90 94 Ryan & Cta

Fair

Cook County, Illinois · 5 M S I-55 · Structure no. 016115000000000

Built
1961
64 years old, rebuilt 2004
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
340 ft
5 main spans
Daily traffic
12,800
2022 count
Owner
State
State Highway Agency

About this bridge

59th ST over I- 90 94 Ryan & Cta is a steel continuous stringer/multi-beam or girder carrying 59th ST over I- 90 94 Ryan & Cta in Cook County, Illinois. It was built in 1961 and reconstructed in 2004, so it is 64 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 12,800 vehicles a day, roughly 10% of them trucks, projected to reach 9,090 by 2046. The structure is 340 ft (103.6 m) long and 85 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries59th ST
CrossesI- 90 94 Ryan & Cta
Location5 M S I-55
CountyCook County
StateIllinois
Coordinates41.78722, -87.63162
Functional classUrban Collector

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79.3 US tons
Inventory rating47.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length340 ft (103.6 m)
Longest span70 ft (21.3 m)
Deck width85 ft (25.9 m)
Roadway width70 ft (21.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,800 (2022)
Projected traffic9,090 by 2046
Trucks10%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway and railroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$2.7 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was 59th ST over I- 90 94 Ryan & Cta built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 2004.

What condition is 59th ST over I- 90 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 February 2024.

How much traffic does 59th ST over I- 90 94 Ryan & Cta carry?

About 12,800 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is 59th ST over I- 90 94 Ryan & Cta?

The structure is 340 ft (103.6 m) long with a longest span of 70 ft (21.3 m) and a deck 85 ft wide.

Who owns 59th ST over I- 90 94 Ryan & Cta?

It is owned by the State Highway Agency.