US Bridges

79th ST over RR - CSXT

Fair

Cook County, Illinois · 0.6 M W Il 43 · Structure no. 016051900000000

Built
1956
69 years old, rebuilt 2011
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
257 ft
5 main spans
Daily traffic
21,300
2023 count
Owner
State
State Highway Agency

About this bridge

79th ST over RR - CSXT is a steel continuous stringer/multi-beam or girder carrying 79th ST over RR - CSXT in Cook County, Illinois. It was built in 1956 and reconstructed in 2011, so it is 69 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 21,300 vehicles a day, roughly 16% of them trucks, projected to reach 22,523 by 2046. The structure is 257 ft (78.2 m) long and 70 ft wide.

Location

Open in Google Maps
Carries79th ST
CrossesRR - CSXT
Location0.6 M W Il 43
CountyCook County
StateIllinois
Coordinates41.74787, -87.81002
Functional classUrban Minor 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating95.7 US tons
Inventory rating57.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length257 ft (78.2 m)
Longest span62 ft (18.9 m)
Deck width70 ft (21.2 m)
Roadway width55 ft (16.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,300 (2023)
Projected traffic22,523 by 2046
Trucks16%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
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 79th ST over RR - CSXT built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 2011.

What condition is 79th ST over RR - CSXT 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 April 2023.

How much traffic does 79th ST over RR - CSXT carry?

About 21,300 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is 79th ST over RR - CSXT?

The structure is 257 ft (78.2 m) long with a longest span of 62 ft (18.9 m) and a deck 70 ft wide.

Who owns 79th ST over RR - CSXT?

It is owned by the State Highway Agency.