US Bridges

Ill 64 over Kilbuck Creek

Fair

Ogle County, Illinois · .3 MI E of I-39 · Structure no. 071001700000000

Built
1936
89 years old, rebuilt 1992
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
158 ft
3 main spans
Daily traffic
4,300
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 64 over Kilbuck Creek is a steel continuous stringer/multi-beam or girder carrying Ill 64 over Kilbuck Creek in Ogle County, Illinois. It was built in 1936 and reconstructed in 1992, so it is 89 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 4,300 vehicles a day, roughly 16% of them trucks, projected to reach 4,368 by 2046. The structure is 158 ft (48.1 m) long and 43 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

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CarriesIll 64
CrossesKilbuck Creek
Location.3 MI E of I-39
RouteState Highway 64
CountyOgle County
StateIllinois
Coordinates42.00721, -89.01479
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating92.8 US tons
Inventory rating55.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length158 ft (48.1 m)
Longest span64 ft (19.4 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,300 (2023)
Projected traffic4,368 by 2046
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 64 over Kilbuck Creek built?

It was built in 1936, making it 89 years old in 2025. It was reconstructed in 1992.

What condition is Ill 64 over Kilbuck 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 August 2023.

How much traffic does Ill 64 over Kilbuck Creek carry?

About 4,300 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is Ill 64 over Kilbuck Creek?

The structure is 158 ft (48.1 m) long with a longest span of 64 ft (19.4 m) and a deck 43 ft wide.

Who owns Ill 64 over Kilbuck Creek?

It is owned by the State Highway Agency.