US Bridges

Mill St. over Fox River

Fair

Kane County, Illinois · Just W. of Ill 25 · Structure no. 045200700000000

Built
1984
41 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
285 ft
4 main spans
Daily traffic
6,500
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mill St. over Fox River is a prestressed concrete stringer/multi-beam or girder carrying Mill St. over Fox River in Kane County, Illinois. It was built in 1984, so it is 41 years old, younger 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 6,500 vehicles a day, roughly 5% of them trucks, projected to reach 7,259 by 2046. The structure is 285 ft (86.9 m) long and 38 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMill St.
CrossesFox River
LocationJust W. of Ill 25
CountyKane County
StateIllinois
Coordinates41.72962, -88.33952
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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.5 US tons
Inventory rating41.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length285 ft (86.9 m)
Longest span71 ft (21.6 m)
Deck width38 ft (11.5 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,500 (2023)
Projected traffic7,259 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

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

Frequently asked questions

When was Mill St. over Fox River built?

It was built in 1984, making it 41 years old in 2025.

What condition is Mill St. 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 June 2024.

How much traffic does Mill St. over Fox River carry?

About 6,500 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Mill St. over Fox River?

The structure is 285 ft (86.9 m) long with a longest span of 71 ft (21.6 m) and a deck 38 ft wide.

Who owns Mill St. over Fox River?

It is owned by the City or Municipal Highway Agency.