US Bridges

Il 140 over Cahokia Creek

Good

Madison County, Illinois · 2.5MI E of Il 159 · Structure no. 060024000000000

Built
2008
17 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
290 ft
3 main spans
Daily traffic
5,650
2023 count
Owner
State
State Highway Agency

About this bridge

Il 140 over Cahokia Creek is a steel continuous stringer/multi-beam or girder carrying Il 140 over Cahokia Creek in Madison County, Illinois. It was built in 2008, so it is 17 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 5,650 vehicles a day, roughly 15% of them trucks, projected to reach 5,457 by 2046. The structure is 290 ft (88.4 m) long and 43 ft wide. If it were closed, the detour would be 21.1 mi (34 km).

Location

Open in Google Maps
CarriesIl 140
CrossesCahokia Creek
Location2.5MI E of Il 159
RouteState Highway 140
CountyMadison County
StateIllinois
Coordinates38.89478, -89.9217
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable 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 rating82.5 US tons
Inventory rating49.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length290 ft (88.4 m)
Longest span130 ft (39.6 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,650 (2023)
Projected traffic5,457 by 2046
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.1 mi (34 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 140 over Cahokia Creek built?

It was built in 2008, making it 17 years old in 2025.

What condition is Il 140 over Cahokia 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 April 2024.

How much traffic does Il 140 over Cahokia Creek carry?

About 5,650 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is Il 140 over Cahokia Creek?

The structure is 290 ft (88.4 m) long with a longest span of 130 ft (39.6 m) and a deck 43 ft wide.

Who owns Il 140 over Cahokia Creek?

It is owned by the State Highway Agency.