US Bridges

N Boone School RD over S. Kinnikinnick Crk.

Fair

Boone County, Illinois · 3.0 MI N Caledonia · Structure no. 004500400000000

Built
1965
60 years old
Condition
Fair
inspected July 2023
Type
Culvert
Steel
Length
33 ft
3 main spans
Daily traffic
100
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

N Boone School RD over S. Kinnikinnick Crk. is a steel culvert carrying N Boone School RD over S. Kinnikinnick Crk. in Boone County, Illinois. It was built in 1965, so it is 60 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 100 vehicles a day, roughly 24% of them trucks, projected to reach 130 by 2046. The structure is 33 ft (10.1 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesN Boone School RD
CrossesS. Kinnikinnick Crk.
Location3.0 MI N Caledonia
RouteCounty Highway 0
CountyBoone County
StateIllinois
Coordinates42.41416, -88.91027
Functional classRural Local

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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span11 ft (3.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2023)
Projected traffic130 by 2046
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 N Boone School RD over S. Kinnikinnick Crk. built?

It was built in 1965, making it 60 years old in 2025.

What condition is N Boone School RD over S. Kinnikinnick Crk. 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 July 2023.

How much traffic does N Boone School RD over S. Kinnikinnick Crk. carry?

About 100 vehicles per day (2023 count), of which roughly 24% are trucks.

How long is N Boone School RD over S. Kinnikinnick Crk.?

The structure is 33 ft (10.1 m) long with a longest span of 11 ft (3.3 m).

Who owns N Boone School RD over S. Kinnikinnick Crk.?

It is owned by the Town or Township Highway Agency.