US Bridges

Il 161 Southbound over Schoenberger Creek

Good

St. Clair County, Illinois · Imi So. ST Clair Ave · Structure no. 082010300000000

Built
2007
18 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
127 ft
1 main span
Daily traffic
14,800
2023 count
Owner
State
State Highway Agency

About this bridge

Il 161 Southbound over Schoenberger Creek is a steel stringer/multi-beam or girder carrying Il 161 Southbound over Schoenberger Creek in St. Clair County, Illinois. It was built in 2007, so it is 18 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 14,800 vehicles a day, roughly 4% of them trucks, projected to reach 6,464 by 2046. The structure is 127 ft (38.7 m) long and 43 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesIl 161 Southbound
CrossesSchoenberger Creek
LocationImi So. ST Clair Ave
RouteState Highway 161
CountySt. Clair County
StateIllinois
Coordinates38.58323, -90.04017
Functional classUrban Other Principal 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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86.1 US tons
Inventory rating51.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length127 ft (38.7 m)
Longest span124 ft (37.9 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,800 (2023)
Projected traffic6,464 by 2046
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 161 Southbound over Schoenberger Creek built?

It was built in 2007, making it 18 years old in 2025.

What condition is Il 161 Southbound over Schoenberger 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 2023.

How much traffic does Il 161 Southbound over Schoenberger Creek carry?

About 14,800 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Il 161 Southbound over Schoenberger Creek?

The structure is 127 ft (38.7 m) long with a longest span of 124 ft (37.9 m) and a deck 43 ft wide.

Who owns Il 161 Southbound over Schoenberger Creek?

It is owned by the State Highway Agency.