US Bridges

US 20 over Il 25 (liberty St)

Fair

Kane County, Illinois · US 20 & Liberty ST · Structure no. 045000700000000

Built
1959
66 years old, rebuilt 2025
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
148 ft
3 main spans
Daily traffic
47,200
2023 count
Owner
State
State Highway Agency

About this bridge

US 20 over Il 25 (liberty St) is a steel continuous stringer/multi-beam or girder carrying US 20 over Il 25 (liberty St) in Kane County, Illinois. It was built in 1959 and reconstructed in 2025, so it is 66 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 47,200 vehicles a day, roughly 10% of them trucks, projected to reach 46,482 by 2046. The structure is 148 ft (45 m) long and 74 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 20
CrossesIl 25 (liberty St)
LocationUS 20 & Liberty ST
RouteU.S. Route 20
CountyKane County
StateIllinois
Coordinates42.02021, -88.26733
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.1 US tons
Inventory rating40.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length148 ft (45 m)
Longest span69 ft (21 m)
Deck width74 ft (22.7 m)
Roadway width69 ft (20.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic47,200 (2023)
Projected traffic46,482 by 2046
Trucks10%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
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 US 20 over Il 25 (liberty St) built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2025.

What condition is US 20 over Il 25 (liberty St) 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 US 20 over Il 25 (liberty St) carry?

About 47,200 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is US 20 over Il 25 (liberty St)?

The structure is 148 ft (45 m) long with a longest span of 69 ft (21 m) and a deck 74 ft wide.

Who owns US 20 over Il 25 (liberty St)?

It is owned by the State Highway Agency.