US Bridges

Rockton RD over N Kinnikinnick Creek

Good

Boone County, Illinois · 6.5 MI NE Roscoe · Structure no. 004306300000000

Built
1973
52 years old
Condition
Good
inspected July 2023
Type
Culvert
Concrete
Length
32 ft
3 main spans
Daily traffic
250
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Rockton RD over N Kinnikinnick Creek is a concrete culvert carrying Rockton RD over N Kinnikinnick Creek in Boone County, Illinois. It was built in 1973, so it is 52 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 250 vehicles a day, roughly 21% of them trucks, projected to reach 208 by 2046. The structure is 32 ft (9.9 m) long. If it were closed, the detour would be 3.7 mi (6 km).

CarriesRockton RD
CrossesN Kinnikinnick Creek
Location6.5 MI NE Roscoe
RouteCounty Highway 0
Coordinates42.45763, -88.92134
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 15
Structure length32 ft (9.9 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2023)
Projected traffic208 by 2046
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Rockton RD over N Kinnikinnick Creek built?

It was built in 1973, making it 52 years old in 2025.

What condition is Rockton RD over N Kinnikinnick Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does Rockton RD over N Kinnikinnick Creek carry?

About 250 vehicles per day (2023 count), of which roughly 21% are trucks.

How long is Rockton RD over N Kinnikinnick Creek?

The structure is 32 ft (9.9 m) long with a longest span of 10 ft (3 m).

Who owns Rockton RD over N Kinnikinnick Creek?

It is owned by the Town or Township Highway Agency.