US Bridges

Stony Isl SB to E over I-90 Stony Is & RR

Fair

Cook County, Illinois · 0.14 M S 79th P7C · Structure no. 016647200000000

Built
1958
67 years old, rebuilt 1998
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
670 ft
4 main spans
Daily traffic
5,000
2000 count
Owner
City
City or Municipal Highway Agency

About this bridge

Stony Isl SB to E over I-90 Stony Is & RR is a steel stringer/multi-beam or girder carrying Stony Isl SB to E over I-90 Stony Is & RR in Cook County, Illinois. It was built in 1958 and reconstructed in 1998, 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 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 5,000 vehicles a day, projected to reach 5,050 by 2046. The structure is 670 ft (204.2 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesStony Isl SB to E
CrossesI-90 Stony Is & RR
Location0.14 M S 79th P7C
CountyCook County
StateIllinois
Coordinates41.74827, -87.58414
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
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 rating67.5 US tons
Inventory rating40.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length670 ft (204.2 m)
Longest span197 ft (60 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2000)
Projected traffic5,050 by 2046
Trucks0%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway and railroad
Detour if closed1.9 mi (3 km)
TollOn a toll 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.7 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Stony Isl SB to E over I-90 Stony Is & RR built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1998.

What condition is Stony Isl SB to E over I-90 Stony Is & RR 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 2023.

How much traffic does Stony Isl SB to E over I-90 Stony Is & RR carry?

About 5,000 vehicles per day (2000 count).

How long is Stony Isl SB to E over I-90 Stony Is & RR?

The structure is 670 ft (204.2 m) long with a longest span of 197 ft (60 m) and a deck 31 ft wide.

Who owns Stony Isl SB to E over I-90 Stony Is & RR?

It is owned by the City or Municipal Highway Agency.