US Bridges

Il 3 over Piasa Creek

Good

Madison County, Illinois · 3.6 M S JCT 100-109 · Structure no. 060034300000000

Built
2011
14 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
242 ft
3 main spans
Daily traffic
3,500
2023 count
Owner
State
State Highway Agency

About this bridge

Il 3 over Piasa Creek is a steel continuous stringer/multi-beam or girder carrying Il 3 over Piasa Creek in Madison County, Illinois. It was built in 2011, so it is 14 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 3,500 vehicles a day, roughly 7% of them trucks, projected to reach 4,548 by 2046. The structure is 242 ft (73.8 m) long and 43 ft wide. If it were closed, the detour would be 36 mi (58 km).

Location

Open in Google Maps
CarriesIl 3
CrossesPiasa Creek
Location3.6 M S JCT 100-109
RouteState Highway 3
CountyMadison County
StateIllinois
Coordinates38.95796, -90.27219
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating64.3 US tons
Inventory rating49.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length242 ft (73.8 m)
Longest span102 ft (31.1 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,500 (2023)
Projected traffic4,548 by 2046
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed36 mi (58 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 3 over Piasa Creek built?

It was built in 2011, making it 14 years old in 2025.

What condition is Il 3 over Piasa 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 September 2023.

How much traffic does Il 3 over Piasa Creek carry?

About 3,500 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Il 3 over Piasa Creek?

The structure is 242 ft (73.8 m) long with a longest span of 102 ft (31.1 m) and a deck 43 ft wide.

Who owns Il 3 over Piasa Creek?

It is owned by the State Highway Agency.