US Bridges

Il 40 over Winnebago Ditch

Fair

Whiteside County, Illinois · 1 MI N Deer Grove · Structure no. 098010900000000

Built
2006
19 years old
Condition
Fair
inspected November 2022
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
168 ft
3 main spans
Daily traffic
2,550
2021 count
Owner
State
State Highway Agency

About this bridge

Il 40 over Winnebago Ditch is a steel continuous stringer/multi-beam or girder carrying Il 40 over Winnebago Ditch in Whiteside County, Illinois. It was built in 2006, so it is 19 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 2,550 vehicles a day, roughly 26% of them trucks, projected to reach 2,576 by 2046. The structure is 168 ft (51.2 m) long and 39 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesIl 40
CrossesWinnebago Ditch
Location1 MI N Deer Grove
RouteState Highway 40
CountyWhiteside County
StateIllinois
Coordinates41.6267, -89.68961
Functional classRural 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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionNovember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating60 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+1 approach)
Design loadHS 20 + Mod
Structure length168 ft (51.2 m)
Longest span57 ft (17.4 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,550 (2021)
Projected traffic2,576 by 2046
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 km)
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Il 40 over Winnebago Ditch built?

It was built in 2006, making it 19 years old in 2025.

What condition is Il 40 over Winnebago Ditch 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 November 2022.

How much traffic does Il 40 over Winnebago Ditch carry?

About 2,550 vehicles per day (2021 count), of which roughly 26% are trucks.

How long is Il 40 over Winnebago Ditch?

The structure is 168 ft (51.2 m) long with a longest span of 57 ft (17.4 m) and a deck 39 ft wide.

Who owns Il 40 over Winnebago Ditch?

It is owned by the State Highway Agency.