US Bridges

Il 31 over Sterns RD

Good

Kane County, Illinois · 3.1 M S of US 20 · Structure no. 045203100000000

Built
2007
18 years old
Condition
Good
inspected February 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
169 ft
2 main spans
Daily traffic
6,250
2023 count
Owner
State
State Highway Agency

About this bridge

Il 31 over Sterns RD is a prestressed concrete continuous stringer/multi-beam or girder carrying Il 31 over Sterns RD in Kane County, Illinois. It was built in 2007, so it is 18 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,250 vehicles a day, roughly 4% of them trucks, projected to reach 7,442 by 2046. The structure is 169 ft (51.4 m) long and 46 ft wide.

CarriesIl 31
CrossesSterns RD
Location3.1 M S of US 20
RouteState Highway 31
Coordinates41.97813, -88.29749
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85 US tons
Inventory rating49.3 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length169 ft (51.4 m)
Longest span88 ft (26.8 m)
Deck width46 ft (14.1 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,250 (2023)
Projected traffic7,442 by 2046
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

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 Il 31 over Sterns RD built?

It was built in 2007, making it 18 years old in 2025.

What condition is Il 31 over Sterns RD in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2022.

How much traffic does Il 31 over Sterns RD carry?

About 6,250 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Il 31 over Sterns RD?

The structure is 169 ft (51.4 m) long with a longest span of 88 ft (26.8 m) and a deck 46 ft wide.

Who owns Il 31 over Sterns RD?

It is owned by the State Highway Agency.