US Bridges

Ill 40 over Coon Creek Ditch

Fair

Whiteside County, Illinois · 1.2 MI N JCT Ill 172 · Structure no. 098200700000000

Built
1972
53 years old
Condition
Fair
inspected January 2024
Type
Culvert
Concrete
Length
36 ft
3 main spans
Daily traffic
3,400
2021 count
Owner
State
State Highway Agency

About this bridge

Ill 40 over Coon Creek Ditch is a concrete culvert carrying Ill 40 over Coon Creek Ditch in Whiteside County, Illinois. It was built in 1972, so it is 53 years old, older 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 3,400 vehicles a day, roughly 18% of them trucks, projected to reach 3,434 by 2046. The structure is 36 ft (11 m) long. If it were closed, the detour would be 6.2 mi (10 km).

CarriesIll 40
CrossesCoon Creek Ditch
Location1.2 MI N JCT Ill 172
RouteState Highway 40
Coordinates41.70629, -89.68986
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.8 US tons
Inventory rating40 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length36 ft (11 m)
Longest span13 ft (4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,400 (2021)
Projected traffic3,434 by 2046
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Ill 40 over Coon Creek Ditch built?

It was built in 1972, making it 53 years old in 2025.

What condition is Ill 40 over Coon Creek 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 January 2024.

How much traffic does Ill 40 over Coon Creek Ditch carry?

About 3,400 vehicles per day (2021 count), of which roughly 18% are trucks.

How long is Ill 40 over Coon Creek Ditch?

The structure is 36 ft (11 m) long with a longest span of 13 ft (4 m).

Who owns Ill 40 over Coon Creek Ditch?

It is owned by the State Highway Agency.