US Bridges

Ill 146 over Trib.Of Cache Creek

Fair

Union County, Illinois · 2 MI W.Johnson Co. · Structure no. 091201300000000

Built
1932
93 years old
Condition
Fair
inspected December 2023
Type
Culvert
Concrete Continuous
Length
23 ft
2 main spans
Daily traffic
2,500
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 146 over Trib.Of Cache Creek is a concrete continuous culvert carrying Ill 146 over Trib.Of Cache Creek in Union County, Illinois. It was built in 1932, so it is 93 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 2,500 vehicles a day, roughly 16% of them trucks, projected to reach 2,727 by 2046. The structure is 23 ft (7.1 m) long. If it were closed, the detour would be 16.2 mi (26 km).

CarriesIll 146
CrossesTrib.Of Cache Creek
Location2 MI W.Johnson Co.
RouteState Highway 146
Coordinates37.44396, -89.08104
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating102.8 US tons
Inventory rating61.4 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length23 ft (7.1 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 traffic2,500 (2023)
Projected traffic2,727 by 2046
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 Ill 146 over Trib.Of Cache Creek built?

It was built in 1932, making it 93 years old in 2025.

What condition is Ill 146 over Trib.Of Cache 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 2023.

How much traffic does Ill 146 over Trib.Of Cache Creek carry?

About 2,500 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is Ill 146 over Trib.Of Cache Creek?

The structure is 23 ft (7.1 m) long with a longest span of 11 ft (3.4 m).

Who owns Ill 146 over Trib.Of Cache Creek?

It is owned by the State Highway Agency.