US Bridges

Il 4 over Lake Fork Creek

Good

Madison County, Illinois · 2.8 MI S JCT 4 & 40 · Structure no. 060033900000000

Built
2006
19 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
106 ft
1 main span
Daily traffic
7,000
2023 count
Owner
State
State Highway Agency

About this bridge

Il 4 over Lake Fork Creek is a steel stringer/multi-beam or girder carrying Il 4 over Lake Fork Creek in Madison County, Illinois. It was built in 2006, so it is 19 years old, younger 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 7,000 vehicles a day, roughly 14% of them trucks, projected to reach 6,367 by 2046. The structure is 106 ft (32.3 m) long and 43 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

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CarriesIl 4
CrossesLake Fork Creek
Location2.8 MI S JCT 4 & 40
RouteState Highway 4
CountyMadison County
StateIllinois
Coordinates38.67924, -89.8094
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.2 US tons
Inventory rating64.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length106 ft (32.3 m)
Longest span106 ft (32.3 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,000 (2023)
Projected traffic6,367 by 2046
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Il 4 over Lake Fork Creek built?

It was built in 2006, making it 19 years old in 2025.

What condition is Il 4 over Lake Fork Creek 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 Il 4 over Lake Fork Creek carry?

About 7,000 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is Il 4 over Lake Fork Creek?

The structure is 106 ft (32.3 m) long with a longest span of 106 ft (32.3 m) and a deck 43 ft wide.

Who owns Il 4 over Lake Fork Creek?

It is owned by the State Highway Agency.