US Bridges

Ill 146 & I-57 over Stream

Fair

Union County, Illinois · FAI 57-ILL 146 · Structure no. 091200800000000

Built
1960
65 years old
Condition
Fair
inspected December 2023
Type
Culvert
Concrete Continuous
Length
30 ft
2 main spans
Daily traffic
5,950
2024 count
Owner
State
State Highway Agency

About this bridge

Ill 146 & I-57 over Stream is a concrete continuous culvert carrying Ill 146 & I-57 over Stream in Union County, Illinois. It was built in 1960, so it is 65 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 5,950 vehicles a day, roughly 55% of them trucks, projected to reach 5,858 by 2046. The structure is 30 ft (9 m) long. If it were closed, the detour would be 1.9 mi (3 km).

CarriesIll 146 & I-57
CrossesStream
LocationFAI 57-ILL 146
RouteInterstate 57
Coordinates37.44831, -89.14389
Functional classRural Principal Arterial - Interstate

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 protection7 GoodSome minor problems.
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80 US tons
Inventory rating47.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length30 ft (9 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,950 (2024)
Projected traffic5,858 by 2046
Trucks55%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 & I-57 over Stream built?

It was built in 1960, making it 65 years old in 2025.

What condition is Ill 146 & I-57 over Stream 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 & I-57 over Stream carry?

About 5,950 vehicles per day (2024 count), of which roughly 55% are trucks.

How long is Ill 146 & I-57 over Stream?

The structure is 30 ft (9 m) long with a longest span of 14 ft (4.3 m).

Who owns Ill 146 & I-57 over Stream?

It is owned by the State Highway Agency.