US Bridges

123rd ST over Il 7 (sw Hwy)

Good

Cook County, Illinois · 0.9 M SW Il 83 · Structure no. 016263600000000

Built
1996
29 years old
Condition
Good
inspected January 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
93 ft
1 main span
Daily traffic
6,650
2022 count
Owner
State
State Highway Agency

About this bridge

123rd ST over Il 7 (sw Hwy) is a steel stringer/multi-beam or girder carrying 123rd ST over Il 7 (sw Hwy) in Cook County, Illinois. It was built in 1996, so it is 29 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,650 vehicles a day, roughly 4% of them trucks, projected to reach 6,919 by 2046. The structure is 93 ft (28.4 m) long and 58 ft wide.

Location

Open in Google Maps
Carries123rd ST
CrossesIl 7 (sw Hwy)
Location0.9 M SW Il 83
CountyCook County
StateIllinois
Coordinates41.66738, -87.82896
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.3 US tons
Inventory rating53.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length93 ft (28.4 m)
Longest span91 ft (27.8 m)
Deck width58 ft (17.8 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,650 (2022)
Projected traffic6,919 by 2046
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
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 123rd ST over Il 7 (sw Hwy) built?

It was built in 1996, making it 29 years old in 2025.

What condition is 123rd ST over Il 7 (sw Hwy) in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2023.

How much traffic does 123rd ST over Il 7 (sw Hwy) carry?

About 6,650 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is 123rd ST over Il 7 (sw Hwy)?

The structure is 93 ft (28.4 m) long with a longest span of 91 ft (27.8 m) and a deck 58 ft wide.

Who owns 123rd ST over Il 7 (sw Hwy)?

It is owned by the State Highway Agency.