US Bridges

Il 83 NB over Il 56

Fair

DuPage County, Illinois · Il 83 over Il 56 · Structure no. 022011800000000

Built
1972
53 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
209 ft
3 main spans
Daily traffic
55,800
2023 count
Owner
State
State Highway Agency

About this bridge

Il 83 NB over Il 56 is a prestressed concrete stringer/multi-beam or girder carrying Il 83 NB over Il 56 in DuPage County, Illinois. It was built in 1972, so it is 53 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 55,800 vehicles a day, roughly 7% of them trucks, projected to reach 14,039 by 2046. The structure is 209 ft (63.6 m) long and 60 ft wide.

Location

Open in Google Maps
CarriesIl 83 NB
CrossesIl 56
LocationIl 83 over Il 56
RouteState Highway 83
CountyDuPage County
StateIllinois
Coordinates41.85735, -87.95791
Functional classUrban Other Principal 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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
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 geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating73.5 US tons
Inventory rating45.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length209 ft (63.6 m)
Longest span100 ft (30.5 m)
Deck width60 ft (18.3 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic55,800 (2023)
Projected traffic14,039 by 2046
Trucks7%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

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 Il 83 NB over Il 56 built?

It was built in 1972, making it 53 years old in 2025.

What condition is Il 83 NB over Il 56 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 Il 83 NB over Il 56 carry?

About 55,800 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Il 83 NB over Il 56?

The structure is 209 ft (63.6 m) long with a longest span of 100 ft (30.5 m) and a deck 60 ft wide.

Who owns Il 83 NB over Il 56?

It is owned by the State Highway Agency.