US Bridges

39th ST (pershing) over I- 90 94 Dan Ryan

Fair

Cook County, Illinois · 1.7 M S I-55 · Structure no. 016039800000000

Built
1962
63 years old, rebuilt 2001
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
297 ft
5 main spans
Daily traffic
15,800
2022 count
Owner
State
State Highway Agency

About this bridge

39th ST (pershing) over I- 90 94 Dan Ryan is a steel continuous stringer/multi-beam or girder carrying 39th ST (pershing) over I- 90 94 Dan Ryan in Cook County, Illinois. It was built in 1962 and reconstructed in 2001, so it is 63 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 15,800 vehicles a day, roughly 15% of them trucks, projected to reach 14,645 by 2046. The structure is 297 ft (90.5 m) long and 98 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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Carries39th ST (pershing)
CrossesI- 90 94 Dan Ryan
Location1.7 M S I-55
CountyCook County
StateIllinois
Coordinates41.82365, -87.63101
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating60.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length297 ft (90.5 m)
Longest span72 ft (21.9 m)
Deck width98 ft (30 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,800 (2022)
Projected traffic14,645 by 2046
Trucks15%
Lanes on structure6
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$6.7 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was 39th ST (pershing) over I- 90 94 Dan Ryan built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 2001.

What condition is 39th ST (pershing) over I- 90 94 Dan Ryan 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 January 2025.

How much traffic does 39th ST (pershing) over I- 90 94 Dan Ryan carry?

About 15,800 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is 39th ST (pershing) over I- 90 94 Dan Ryan?

The structure is 297 ft (90.5 m) long with a longest span of 72 ft (21.9 m) and a deck 98 ft wide.

Who owns 39th ST (pershing) over I- 90 94 Dan Ryan?

It is owned by the State Highway Agency.