US Bridges

Ill 251 NB over N Kinnikinnick CR

Fair

Winnebago County, Illinois · 0.1 M S Hononegah RD · Structure no. 101003500000000

Built
1967
58 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
163 ft
3 main spans
Daily traffic
27,200
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 251 NB over N Kinnikinnick CR is a steel continuous stringer/multi-beam or girder carrying Ill 251 NB over N Kinnikinnick CR in Winnebago County, Illinois. It was built in 1967, so it is 58 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 27,200 vehicles a day, roughly 3% of them trucks, projected to reach 12,979 by 2046. The structure is 163 ft (49.7 m) long and 36 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

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CarriesIll 251 NB
CrossesN Kinnikinnick CR
Location0.1 M S Hononegah RD
RouteState Highway 251
CountyWinnebago County
StateIllinois
Coordinates42.42569, -89.01665
Functional classUrban Other Principal 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating39.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length163 ft (49.7 m)
Longest span58 ft (17.7 m)
Deck width36 ft (10.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27,200 (2023)
Projected traffic12,979 by 2046
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 km)
TollOn a free road
National Highway SystemYes

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 251 NB over N Kinnikinnick CR built?

It was built in 1967, making it 58 years old in 2025.

What condition is Ill 251 NB over N Kinnikinnick CR 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 April 2024.

How much traffic does Ill 251 NB over N Kinnikinnick CR carry?

About 27,200 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Ill 251 NB over N Kinnikinnick CR?

The structure is 163 ft (49.7 m) long with a longest span of 58 ft (17.7 m) and a deck 36 ft wide.

Who owns Ill 251 NB over N Kinnikinnick CR?

It is owned by the State Highway Agency.