US Bridges

FAI 57 SB over Ill 146

Good

Union County, Illinois · Over Ill 146 · Structure no. 091001200000000

Built
1958
67 years old, rebuilt 2017
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
137 ft
3 main spans
Daily traffic
5,750
2024 count
Owner
State
State Highway Agency

About this bridge

FAI 57 SB over Ill 146 is a steel continuous stringer/multi-beam or girder carrying FAI 57 SB over Ill 146 in Union County, Illinois. It was built in 1958 and reconstructed in 2017, so it is 67 years old, older 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 5,750 vehicles a day, roughly 50% of them trucks, projected to reach 7,525 by 2046. The structure is 137 ft (41.8 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesFAI 57 SB
CrossesIll 146
LocationOver Ill 146
RouteInterstate 57
Coordinates37.44861, -89.14371
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.5 US tons
Inventory rating51 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length137 ft (41.8 m)
Longest span52 ft (15.8 m)
Deck width44 ft (13.5 m)
Roadway width41 ft (12.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,750 (2024)
Projected traffic7,525 by 2046
Trucks50%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$594,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was FAI 57 SB over Ill 146 built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 2017.

What condition is FAI 57 SB over Ill 146 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 October 2024.

How much traffic does FAI 57 SB over Ill 146 carry?

About 5,750 vehicles per day (2024 count), of which roughly 50% are trucks.

How long is FAI 57 SB over Ill 146?

The structure is 137 ft (41.8 m) long with a longest span of 52 ft (15.8 m) and a deck 44 ft wide.

Who owns FAI 57 SB over Ill 146?

It is owned by the State Highway Agency.