US Bridges

Ill 4 over FAI 70

Good

Madison County, Illinois · 1.75 M S of 143 & 4 · Structure no. 060010800000000

Built
1964
61 years old, rebuilt 2000
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
223 ft
4 main spans
Daily traffic
8,200
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 4 over FAI 70 is a steel continuous stringer/multi-beam or girder carrying Ill 4 over FAI 70 in Madison County, Illinois. It was built in 1964 and reconstructed in 2000, so it is 61 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 8,200 vehicles a day, roughly 14% of them trucks, projected to reach 7,758 by 2046. The structure is 223 ft (68.1 m) long and 38 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesIll 4
CrossesFAI 70
Location1.75 M S of 143 & 4
RouteState Highway 4
Coordinates38.76178, -89.80067
Functional classRural Principal Arterial - Other

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.3 US tons
Inventory rating53.6 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length223 ft (68.1 m)
Longest span67 ft (20.4 m)
Deck width38 ft (11.5 m)
Roadway width34 ft (10.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,200 (2023)
Projected traffic7,758 by 2046
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed6.2 mi (10 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Ill 4 over FAI 70 built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 2000.

What condition is Ill 4 over FAI 70 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 2023.

How much traffic does Ill 4 over FAI 70 carry?

About 8,200 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is Ill 4 over FAI 70?

The structure is 223 ft (68.1 m) long with a longest span of 67 ft (20.4 m) and a deck 38 ft wide.

Who owns Ill 4 over FAI 70?

It is owned by the State Highway Agency.