US Bridges

I 39 & US 51 over Kilbuck Creek Trib

Fair

Ogle County, Illinois · 1.4MI S Winnebago CO · Structure no. 071201800000000

Built
1981
44 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
32,800
2023 count
Owner
State
State Highway Agency

About this bridge

I 39 & US 51 over Kilbuck Creek Trib is a concrete culvert carrying I 39 & US 51 over Kilbuck Creek Trib in Ogle County, Illinois. It was built in 1981, so it is 44 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 32,800 vehicles a day, roughly 31% of them trucks, projected to reach 31,512 by 2046. The structure is 26 ft (7.8 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 39 & US 51
CrossesKilbuck Creek Trib
Location1.4MI S Winnebago CO
RouteInterstate 39
CountyOgle County
StateIllinois
Coordinates42.13193, -89.02302
Functional classRural Principal Arterial - Interstate

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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 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 rating107.1 US tons
Inventory rating74 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length26 ft (7.8 m)
Longest span12 ft (3.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32,800 (2023)
Projected traffic31,512 by 2046
Trucks31%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I 39 & US 51 over Kilbuck Creek Trib built?

It was built in 1981, making it 44 years old in 2025.

What condition is I 39 & US 51 over Kilbuck Creek Trib 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 September 2024.

How much traffic does I 39 & US 51 over Kilbuck Creek Trib carry?

About 32,800 vehicles per day (2023 count), of which roughly 31% are trucks.

How long is I 39 & US 51 over Kilbuck Creek Trib?

The structure is 26 ft (7.8 m) long with a longest span of 12 ft (3.8 m).

Who owns I 39 & US 51 over Kilbuck Creek Trib?

It is owned by the State Highway Agency.