US Bridges

Ill 146 over Dutch Creek

Fair

Union County, Illinois · 4 MI W. Jonesboro · Structure no. 091005900000000

Built
1974
51 years old, rebuilt 2008
Condition
Fair
inspected December 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
139 ft
3 main spans
Daily traffic
4,050
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 146 over Dutch Creek is a prestressed concrete box beam or girders - multiple carrying Ill 146 over Dutch Creek in Union County, Illinois. It was built in 1974 and reconstructed in 2008, so it is 51 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 4,050 vehicles a day, roughly 13% of them trucks, projected to reach 4,747 by 2046. The structure is 139 ft (42.4 m) long and 45 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

CarriesIll 146
CrossesDutch Creek
Location4 MI W. Jonesboro
RouteState Highway 146
Coordinates37.45294, -89.33989
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96.8 US tons
Inventory rating57.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length139 ft (42.4 m)
Longest span47 ft (14.3 m)
Deck width45 ft (13.8 m)
Roadway width44 ft (13.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,050 (2023)
Projected traffic4,747 by 2046
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 km)
TollOn a free road
National Highway SystemYes

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 Ill 146 over Dutch Creek built?

It was built in 1974, making it 51 years old in 2025. It was reconstructed in 2008.

What condition is Ill 146 over Dutch Creek 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 December 2024.

How much traffic does Ill 146 over Dutch Creek carry?

About 4,050 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is Ill 146 over Dutch Creek?

The structure is 139 ft (42.4 m) long with a longest span of 47 ft (14.3 m) and a deck 45 ft wide.

Who owns Ill 146 over Dutch Creek?

It is owned by the State Highway Agency.