US Bridges

Ch 1 / Fox River D over Big Rock Creek

Fair

Kendall County, Illinois · 1.5 MI S RTE 34 · Structure no. 047315000000000

Built
2008
17 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
205 ft
2 main spans
Daily traffic
4,100
2024 count
Owner
County
County Highway Agency

About this bridge

Ch 1 / Fox River D over Big Rock Creek is a steel stringer/multi-beam or girder carrying Ch 1 / Fox River D over Big Rock Creek in Kendall County, Illinois. It was built in 2008, so it is 17 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 4,100 vehicles a day, roughly 6% of them trucks, projected to reach 5,919 by 2046. The structure is 205 ft (62.4 m) long and 43 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCh 1 / Fox River D
CrossesBig Rock Creek
Location1.5 MI S RTE 34
CountyKendall County
StateIllinois
Coordinates41.64113, -88.53742
Functional classUrban Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.5 US tons
Inventory rating39.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length205 ft (62.4 m)
Longest span99 ft (30.1 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,100 (2024)
Projected traffic5,919 by 2046
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Ch 1 / Fox River D over Big Rock Creek built?

It was built in 2008, making it 17 years old in 2025.

What condition is Ch 1 / Fox River D over Big Rock Creek 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 December 2023.

How much traffic does Ch 1 / Fox River D over Big Rock Creek carry?

About 4,100 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Ch 1 / Fox River D over Big Rock Creek?

The structure is 205 ft (62.4 m) long with a longest span of 99 ft (30.1 m) and a deck 43 ft wide.

Who owns Ch 1 / Fox River D over Big Rock Creek?

It is owned by the County Highway Agency.