US Bridges

Il 140 over Silver Creek

Good

Madison County, Illinois · 0.5MI E of Il 4 · Structure no. 060026000000000

Built
1992
33 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
161 ft
3 main spans
Daily traffic
2,750
2023 count
Owner
State
State Highway Agency

About this bridge

Il 140 over Silver Creek is a steel continuous stringer/multi-beam or girder carrying Il 140 over Silver Creek in Madison County, Illinois. It was built in 1992, so it is 33 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 2,750 vehicles a day, roughly 7% of them trucks, projected to reach 2,729 by 2046. The structure is 161 ft (49.1 m) long and 35 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

CarriesIl 140
CrossesSilver Creek
Location0.5MI E of Il 4
RouteState Highway 140
Coordinates38.88859, -89.79089
Functional classRural Minor Arterial

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.2 US tons
Inventory rating52.1 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length161 ft (49.1 m)
Longest span61 ft (18.6 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,750 (2023)
Projected traffic2,729 by 2046
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 km)
TollOn a free road
National Highway SystemNo

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 Silver Creek built?

It was built in 1992, making it 33 years old in 2025.

What condition is Il 140 over Silver 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 Silver Creek carry?

About 2,750 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Il 140 over Silver Creek?

The structure is 161 ft (49.1 m) long with a longest span of 61 ft (18.6 m) and a deck 35 ft wide.

Who owns Il 140 over Silver Creek?

It is owned by the State Highway Agency.