US Bridges

Il 180 over Cadwell CR

Fair

Knox County, Illinois · 2 MI N Williamsfield · Structure no. 048008500000000

Built
2000
25 years old
Condition
Fair
inspected August 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
81 ft
1 main span
Daily traffic
400
2023 count
Owner
State
State Highway Agency

About this bridge

Il 180 over Cadwell CR is a prestressed concrete stringer/multi-beam or girder carrying Il 180 over Cadwell CR in Knox County, Illinois. It was built in 2000, so it is 25 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 400 vehicles a day, roughly 9% of them trucks, projected to reach 429 by 2046. The structure is 81 ft (24.7 m) long and 35 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesIl 180
CrossesCadwell CR
Location2 MI N Williamsfield
RouteState Highway 180
CountyKnox County
StateIllinois
Coordinates40.96046, -90.01405
Functional classRural Major Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2021
Inspection intervalevery 48 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 alignment8: Equal to present desirable criteria
Operating rating55.3 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length81 ft (24.7 m)
Longest span79 ft (24 m)
Deck width35 ft (10.6 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2023)
Projected traffic429 by 2046
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 180 over Cadwell CR built?

It was built in 2000, making it 25 years old in 2025.

What condition is Il 180 over Cadwell CR 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 August 2021.

How much traffic does Il 180 over Cadwell CR carry?

About 400 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is Il 180 over Cadwell CR?

The structure is 81 ft (24.7 m) long with a longest span of 79 ft (24 m) and a deck 35 ft wide.

Who owns Il 180 over Cadwell CR?

It is owned by the State Highway Agency.