US Bridges

Ill 40 over Skunk Creek

Fair

Whiteside County, Illinois · 3.5 MI E Coleta · Structure no. 098200200000000

Built
1957
68 years old
Condition
Fair
inspected December 2023
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
2,400
2021 count
Owner
State
State Highway Agency

About this bridge

Ill 40 over Skunk Creek is a concrete culvert carrying Ill 40 over Skunk Creek in Whiteside County, Illinois. It was built in 1957, so it is 68 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 5 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 2,400 vehicles a day, roughly 9% of them trucks, projected to reach 2,424 by 2046. The structure is 26 ft (7.9 m) long and 72 ft wide. If it were closed, the detour would be 31.7 mi (51 km).

Location

Open in Google Maps
CarriesIll 40
CrossesSkunk Creek
Location3.5 MI E Coleta
RouteState Highway 40
CountyWhiteside County
StateIllinois
Coordinates41.90212, -89.73835
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span12 ft (3.8 m)
Deck width72 ft (21.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,400 (2021)
Projected traffic2,424 by 2046
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.7 mi (51 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 Skunk Creek built?

It was built in 1957, making it 68 years old in 2025.

What condition is Ill 40 over Skunk 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 Ill 40 over Skunk Creek carry?

About 2,400 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is Ill 40 over Skunk Creek?

The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.8 m) and a deck 72 ft wide.

Who owns Ill 40 over Skunk Creek?

It is owned by the State Highway Agency.