US Bridges

US 6 over Shabbona Specl Ditch

Good

Henry County, Illinois · 2 Mi. E. Atkinson · Structure no. 037201600000000

Built
1993
32 years old
Condition
Good
inspected November 2022
Type
Culvert
Concrete
Length
32 ft
2 main spans
Daily traffic
1,500
2023 count
Owner
State
State Highway Agency

About this bridge

US 6 over Shabbona Specl Ditch is a concrete culvert carrying US 6 over Shabbona Specl Ditch in Henry 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 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 1,500 vehicles a day, roughly 13% of them trucks, projected to reach 1,782 by 2046. The structure is 32 ft (9.8 m) long and 38 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesUS 6
CrossesShabbona Specl Ditch
Location2 Mi. E. Atkinson
RouteU.S. Route 6
Coordinates41.4109, -89.96616
Functional classRural Major Collector

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 protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionNovember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79.3 US tons
Inventory rating47.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span16 ft (4.8 m)
Deck width38 ft (11.6 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2023)
Projected traffic1,782 by 2046
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 US 6 over Shabbona Specl Ditch built?

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

What condition is US 6 over Shabbona Specl Ditch 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 2022.

How much traffic does US 6 over Shabbona Specl Ditch carry?

About 1,500 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is US 6 over Shabbona Specl Ditch?

The structure is 32 ft (9.8 m) long with a longest span of 16 ft (4.8 m) and a deck 38 ft wide.

Who owns US 6 over Shabbona Specl Ditch?

It is owned by the State Highway Agency.