US Bridges

Chicago ST over Fox River

Poor

Kane County, Illinois · 0.06 MI E. of IL-31 · Structure no. 045005800000000

Built
1939
86 years old
Condition
Poor
inspected April 2024
Type
Tee Beam
Concrete Continuous
Length
277 ft
4 main spans
Daily traffic
12,400
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Chicago ST over Fox River is a concrete continuous tee beam carrying Chicago ST over Fox River in Kane County, Illinois. It was built in 1939, so it is 86 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 12,400 vehicles a day, roughly 1% of them trucks, projected to reach 15,982 by 2046. The structure is 277 ft (84.4 m) long and 75 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesChicago ST
CrossesFox River
Location0.06 MI E. of IL-31
CountyKane County
StateIllinois
Coordinates42.03684, -88.28638
Functional classUrban Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating41.8 US tons
Inventory rating27.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length277 ft (84.4 m)
Longest span79 ft (24.1 m)
Deck width75 ft (22.9 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,400 (2023)
Projected traffic15,982 by 2046
Trucks1%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Chicago ST over Fox River built?

It was built in 1939, making it 86 years old in 2025.

What condition is Chicago ST over Fox River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2024.

How much traffic does Chicago ST over Fox River carry?

About 12,400 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Chicago ST over Fox River?

The structure is 277 ft (84.4 m) long with a longest span of 79 ft (24.1 m) and a deck 75 ft wide.

Who owns Chicago ST over Fox River?

It is owned by the City or Municipal Highway Agency.