US Bridges

US 20 over Il 83

Fair

DuPage County, Illinois · 1.25 M N of Il 64 · Structure no. 022012000000000

Built
1969
56 years old, rebuilt 2002
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
342 ft
3 main spans
Daily traffic
28,500
2023 count
Owner
State
State Highway Agency

About this bridge

US 20 over Il 83 is a steel continuous stringer/multi-beam or girder carrying US 20 over Il 83 in DuPage County, Illinois. It was built in 1969 and reconstructed in 2002, so it is 56 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 28,500 vehicles a day, roughly 7% of them trucks, projected to reach 29,997 by 2046. The structure is 342 ft (104.3 m) long and 100 ft wide.

CarriesUS 20
CrossesIl 83
Location1.25 M N of Il 64
RouteU.S. Route 20
Coordinates41.92435, -87.96707
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81 US tons
Inventory rating48.6 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length342 ft (104.3 m)
Longest span128 ft (39 m)
Deck width100 ft (30.5 m)
Roadway width84 ft (25.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,500 (2023)
Projected traffic29,997 by 2046
Trucks7%
Lanes on structure4
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 US 20 over Il 83 built?

It was built in 1969, making it 56 years old in 2025. It was reconstructed in 2002.

What condition is US 20 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 July 2023.

How much traffic does US 20 over Il 83 carry?

About 28,500 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is US 20 over Il 83?

The structure is 342 ft (104.3 m) long with a longest span of 128 ft (39 m) and a deck 100 ft wide.

Who owns US 20 over Il 83?

It is owned by the State Highway Agency.