US Bridges

TR-321 Cannonball over E Fork Spoon River

Good

Bureau County, Illinois · 1 Mi. E. Neponset · Structure no. 006501700000000

Built
1993
32 years old
Condition
Good
inspected November 2023
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
75
2010 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR-321 Cannonball over E Fork Spoon River is a concrete continuous culvert carrying TR-321 Cannonball over E Fork Spoon River in Bureau County, Illinois. It was built in 1993, so it is 32 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 75 vehicles a day, roughly 4% of them trucks, projected to reach 76 by 2046. The structure is 21 ft (6.3 m) long. If it were closed, the detour would be 3.1 mi (5 km).

CarriesTR-321 Cannonball
CrossesE Fork Spoon River
Location1 Mi. E. Neponset
RouteCounty Highway 0
Coordinates41.30011, -89.76433
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.
Culvert8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.7 US tons
Inventory rating39.2 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.3 m)
Longest span10 ft (3.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2010)
Projected traffic76 by 2046
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 TR-321 Cannonball over E Fork Spoon River built?

It was built in 1993, making it 32 years old in 2025.

What condition is TR-321 Cannonball over E Fork Spoon River 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 November 2023.

How much traffic does TR-321 Cannonball over E Fork Spoon River carry?

About 75 vehicles per day (2010 count), of which roughly 4% are trucks.

How long is TR-321 Cannonball over E Fork Spoon River?

The structure is 21 ft (6.3 m) long with a longest span of 10 ft (3.2 m).

Who owns TR-321 Cannonball over E Fork Spoon River?

It is owned by the Town or Township Highway Agency.