US Bridges

Il 56 over Fox River

Fair

Kane County, Illinois · 0.1 MI E of Il 31 · Structure no. 045005400000000

Built
1931
94 years old, rebuilt 1972
Condition
Fair
inspected July 2023
Type
Other
Concrete
Length
366 ft
5 main spans
Daily traffic
11,900
2023 count
Owner
State
State Highway Agency

About this bridge

Il 56 over Fox River is a concrete other carrying Il 56 over Fox River in Kane County, Illinois. It was built in 1931 and reconstructed in 1972, so it is 94 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 11,900 vehicles a day, roughly 6% of them trucks, projected to reach 14,884 by 2046. The structure is 366 ft (111.7 m) long and 48 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesIl 56
CrossesFox River
Location0.1 MI E of Il 31
RouteState Highway 56
CountyKane County
StateIllinois
Coordinates41.80644, -88.32444
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating47.5 US tons
Inventory rating23.9 US tons

Structure

Structure typeOther
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length366 ft (111.7 m)
Longest span74 ft (22.6 m)
Deck width48 ft (14.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,900 (2023)
Projected traffic14,884 by 2046
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Il 56 over Fox River built?

It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1972.

What condition is Il 56 over Fox River 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 Il 56 over Fox River carry?

About 11,900 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Il 56 over Fox River?

The structure is 366 ft (111.7 m) long with a longest span of 74 ft (22.6 m) and a deck 48 ft wide.

Who owns Il 56 over Fox River?

It is owned by the State Highway Agency.