US Bridges

31st ST over Il 83

Fair

DuPage County, Illinois · 1 M S I-88 Ew Toll · Structure no. 022014000000000

Built
1974
51 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
216 ft
2 main spans
Daily traffic
20,100
2024 count
Owner
State
State Highway Agency

About this bridge

31st ST over Il 83 is a steel continuous stringer/multi-beam or girder carrying 31st ST over Il 83 in DuPage County, Illinois. It was built in 1974, so it is 51 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 20,100 vehicles a day, roughly 3% of them trucks, projected to reach 14,342 by 2046. The structure is 216 ft (65.7 m) long and 86 ft wide.

Location

Open in Google Maps
Carries31st ST
CrossesIl 83
Location1 M S I-88 Ew Toll
CountyDuPage County
StateIllinois
Coordinates41.8322, -87.95532
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 inspectionJanuary 2025
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 rating86.4 US tons
Inventory rating46.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length216 ft (65.7 m)
Longest span83 ft (25.3 m)
Deck width86 ft (26.2 m)
Roadway width79 ft (24.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,100 (2024)
Projected traffic14,342 by 2046
Trucks3%
Lanes on structure6
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 31st ST over Il 83 built?

It was built in 1974, making it 51 years old in 2025.

What condition is 31st ST over Il 83 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 January 2025.

How much traffic does 31st ST over Il 83 carry?

About 20,100 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is 31st ST over Il 83?

The structure is 216 ft (65.7 m) long with a longest span of 83 ft (25.3 m) and a deck 86 ft wide.

Who owns 31st ST over Il 83?

It is owned by the State Highway Agency.