US Bridges

123rd ST over I- 57

Fair

Cook County, Illinois · 3.6 M SW Il 1 · Structure no. 016203300000000

Built
1966
59 years old, rebuilt 2001
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
237 ft
4 main spans
Daily traffic
3,100
2022 count
Owner
State
State Highway Agency

About this bridge

123rd ST over I- 57 is a steel continuous stringer/multi-beam or girder carrying 123rd ST over I- 57 in Cook County, Illinois. It was built in 1966 and reconstructed in 2001, so it is 59 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 3,100 vehicles a day, roughly 9% of them trucks, projected to reach 3,207 by 2046. The structure is 237 ft (72.1 m) long and 36 ft wide.

Location

Open in Google Maps
Carries123rd ST
CrossesI- 57
Location3.6 M SW Il 1
CountyCook County
StateIllinois
Coordinates41.6703, -87.66276
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86.1 US tons
Inventory rating51.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length237 ft (72.1 m)
Longest span71 ft (21.6 m)
Deck width36 ft (11 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,100 (2022)
Projected traffic3,207 by 2046
Trucks9%
Lanes on structure2
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was 123rd ST over I- 57 built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 2001.

What condition is 123rd 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 February 2024.

How much traffic does 123rd ST over I- 57 carry?

About 3,100 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is 123rd ST over I- 57?

The structure is 237 ft (72.1 m) long with a longest span of 71 ft (21.6 m) and a deck 36 ft wide.

Who owns 123rd ST over I- 57?

It is owned by the State Highway Agency.