US Bridges

Il 40 FAP 646 over Spoon Creek Trib 1

Good

Bureau County, Illinois · 2.3 MI N of Stark CO · Structure no. 006200700000000

Built
1985
40 years old
Condition
Good
inspected December 2021
Type
Culvert
Concrete
Length
24 ft
2 main spans
Daily traffic
1,100
2023 count
Owner
State
State Highway Agency

About this bridge

Il 40 FAP 646 over Spoon Creek Trib 1 is a concrete culvert carrying Il 40 FAP 646 over Spoon Creek Trib 1 in Bureau County, Illinois. It was built in 1985, so it is 40 years old, younger 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 1,100 vehicles a day, roughly 23% of them trucks, projected to reach 1,263 by 2046. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 37.9 mi (61 km).

CarriesIl 40 FAP 646
CrossesSpoon Creek Trib 1
Location2.3 MI N of Stark CO
RouteState Highway 40
Coordinates41.26793, -89.68345
Functional classRural Minor Arterial

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 inspectionDecember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.9 US tons
Inventory rating43.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,100 (2023)
Projected traffic1,263 by 2046
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed37.9 mi (61 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 Il 40 FAP 646 over Spoon Creek Trib 1 built?

It was built in 1985, making it 40 years old in 2025.

What condition is Il 40 FAP 646 over Spoon Creek Trib 1 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 December 2021.

How much traffic does Il 40 FAP 646 over Spoon Creek Trib 1 carry?

About 1,100 vehicles per day (2023 count), of which roughly 23% are trucks.

How long is Il 40 FAP 646 over Spoon Creek Trib 1?

The structure is 24 ft (7.3 m) long with a longest span of 11 ft (3.4 m).

Who owns Il 40 FAP 646 over Spoon Creek Trib 1?

It is owned by the State Highway Agency.