US Bridges

Il 161 over Kaskaskia River

Fair

Clinton County, Illinois · 4.5M East Bartelso · Structure no. 014007100000000

Built
1994
31 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
720 ft
5 main spans
Daily traffic
2,250
2023 count
Owner
State
State Highway Agency

About this bridge

Il 161 over Kaskaskia River is a steel continuous stringer/multi-beam or girder carrying Il 161 over Kaskaskia River in Clinton County, Illinois. It was built in 1994, so it is 31 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 2,250 vehicles a day, roughly 11% of them trucks, projected to reach 2,585 by 2046. The structure is 720 ft (219.6 m) long and 35 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesIl 161
CrossesKaskaskia River
Location4.5M East Bartelso
RouteState Highway 161
CountyClinton County
StateIllinois
Coordinates38.53649, -89.38395
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 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 rating84.3 US tons
Inventory rating50.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length720 ft (219.6 m)
Longest span168 ft (51.2 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,250 (2023)
Projected traffic2,585 by 2046
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 161 over Kaskaskia River built?

It was built in 1994, making it 31 years old in 2025.

What condition is Il 161 over Kaskaskia River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2023.

How much traffic does Il 161 over Kaskaskia River carry?

About 2,250 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is Il 161 over Kaskaskia River?

The structure is 720 ft (219.6 m) long with a longest span of 168 ft (51.2 m) and a deck 35 ft wide.

Who owns Il 161 over Kaskaskia River?

It is owned by the State Highway Agency.