US Bridges

Illinois 146 over Dutchman Creek

Fair

Johnson County, Illinois · 2.3 Mi. W. Vienna · Structure no. 044005200000000

Built
1973
52 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
163 ft
3 main spans
Daily traffic
3,100
2023 count
Owner
State
State Highway Agency

About this bridge

Illinois 146 over Dutchman Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying Illinois 146 over Dutchman Creek in Johnson 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 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 3,100 vehicles a day, roughly 14% of them trucks, projected to reach 3,990 by 2046. The structure is 163 ft (49.7 m) long and 46 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesIllinois 146
CrossesDutchman Creek
Location2.3 Mi. W. Vienna
RouteState Highway 146
CountyJohnson County
StateIllinois
Coordinates37.42258, -88.94462
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.6 US tons
Inventory rating44.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length163 ft (49.7 m)
Longest span52 ft (16 m)
Deck width46 ft (14 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,100 (2023)
Projected traffic3,990 by 2046
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Illinois 146 over Dutchman Creek built?

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

What condition is Illinois 146 over Dutchman 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 July 2024.

How much traffic does Illinois 146 over Dutchman Creek carry?

About 3,100 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is Illinois 146 over Dutchman Creek?

The structure is 163 ft (49.7 m) long with a longest span of 52 ft (16 m) and a deck 46 ft wide.

Who owns Illinois 146 over Dutchman Creek?

It is owned by the State Highway Agency.