US Bridges

Ill 161 over Sugar Creek

Good

Clinton County, Illinois · 4 M E New Baden · Structure no. 014007800000000

Built
2010
15 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
353 ft
5 main spans
Daily traffic
4,500
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 161 over Sugar Creek is a steel continuous stringer/multi-beam or girder carrying Ill 161 over Sugar Creek in Clinton County, Illinois. It was built in 2010, so it is 15 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 4,500 vehicles a day, roughly 6% of them trucks, projected to reach 5,610 by 2046. The structure is 353 ft (107.6 m) long and 39 ft wide. If it were closed, the detour would be 47.2 mi (76 km).

Location

Open in Google Maps
CarriesIll 161
CrossesSugar Creek
Location4 M E New Baden
RouteState Highway 161
CountyClinton County
StateIllinois
Coordinates38.54138, -89.62661
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 48 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 rating95.3 US tons
Inventory rating57.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 25 or greater
Structure length353 ft (107.6 m)
Longest span76 ft (23.3 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,500 (2023)
Projected traffic5,610 by 2046
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed47.2 mi (76 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 Ill 161 over Sugar Creek built?

It was built in 2010, making it 15 years old in 2025.

What condition is Ill 161 over Sugar 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 Ill 161 over Sugar Creek carry?

About 4,500 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Ill 161 over Sugar Creek?

The structure is 353 ft (107.6 m) long with a longest span of 76 ft (23.3 m) and a deck 39 ft wide.

Who owns Ill 161 over Sugar Creek?

It is owned by the State Highway Agency.