US Bridges

31st ST over RR - BNSF & Brc

Fair

Cook County, Illinois · 0.3 M E Il 50 · Structure no. 016087100000000

Built
1957
68 years old, rebuilt 2009
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
495 ft
7 main spans
Daily traffic
9,350
2023 count
Owner
State
State Highway Agency

About this bridge

31st ST over RR - BNSF & Brc is a steel continuous stringer/multi-beam or girder carrying 31st ST over RR - BNSF & Brc in Cook County, Illinois. It was built in 1957 and reconstructed in 2009, so it is 68 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 9,350 vehicles a day, roughly 5% of them trucks, projected to reach 9,545 by 2046. The structure is 495 ft (150.9 m) long and 48 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries31st ST
CrossesRR - BNSF & Brc
Location0.3 M E Il 50
CountyCook County
StateIllinois
Coordinates41.83671, -87.73917
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionDecember 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 alignment6: Equal to present minimum criteria
Operating rating75.7 US tons
Inventory rating45.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20 + Mod
Structure length495 ft (150.9 m)
Longest span86 ft (26.2 m)
Deck width48 ft (14.5 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,350 (2023)
Projected traffic9,545 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.9 mi (3 km)
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$7.1 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was 31st ST over RR - BNSF & Brc built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 2009.

What condition is 31st ST over RR - BNSF & Brc 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 December 2023.

How much traffic does 31st ST over RR - BNSF & Brc carry?

About 9,350 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is 31st ST over RR - BNSF & Brc?

The structure is 495 ft (150.9 m) long with a longest span of 86 ft (26.2 m) and a deck 48 ft wide.

Who owns 31st ST over RR - BNSF & Brc?

It is owned by the State Highway Agency.