US Bridges

115th ST over I- 57

Fair

Cook County, Illinois · 2.6 M SW Il 1 · Structure no. 016203700000000

Built
1965
60 years old, rebuilt 2010
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
187 ft
2 main spans
Daily traffic
9,700
2023 count
Owner
State
State Highway Agency

About this bridge

115th ST over I- 57 is a steel continuous stringer/multi-beam or girder carrying 115th ST over I- 57 in Cook County, Illinois. It was built in 1965 and reconstructed in 2010, so it is 60 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 9,700 vehicles a day, roughly 3% of them trucks, projected to reach 9,898 by 2046. The structure is 187 ft (57 m) long and 83 ft wide.

Location

Open in Google Maps
Carries115th ST
CrossesI- 57
Location2.6 M SW Il 1
CountyCook County
StateIllinois
Coordinates41.68482, -87.66198
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating92.8 US tons
Inventory rating55.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length187 ft (57 m)
Longest span91 ft (27.8 m)
Deck width83 ft (25.3 m)
Roadway width66 ft (20 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,700 (2023)
Projected traffic9,898 by 2046
Trucks3%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 115th ST over I- 57 built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 2010.

What condition is 115th ST over I- 57 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 October 2023.

How much traffic does 115th ST over I- 57 carry?

About 9,700 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is 115th ST over I- 57?

The structure is 187 ft (57 m) long with a longest span of 91 ft (27.8 m) and a deck 83 ft wide.

Who owns 115th ST over I- 57?

It is owned by the State Highway Agency.