US Bridges

Ill. 164 over Cedar Creek Trib.

Fair

Warren County, Illinois · .1MI W of Knox CO LN · Structure no. 094003400000000

Built
1991
34 years old
Condition
Fair
inspected March 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
59 ft
1 main span
Daily traffic
3,150
2023 count
Owner
State
State Highway Agency

About this bridge

Ill. 164 over Cedar Creek Trib. is a steel stringer/multi-beam or girder carrying Ill. 164 over Cedar Creek Trib. in Warren County, Illinois. It was built in 1991, so it is 34 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 3,150 vehicles a day, roughly 6% of them trucks, projected to reach 2,626 by 2046. The structure is 59 ft (18 m) long and 35 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesIll. 164
CrossesCedar Creek Trib.
Location.1MI W of Knox CO LN
RouteState Highway 164
CountyWarren County
StateIllinois
Coordinates40.94748, -90.44279
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2022
Inspection intervalevery 48 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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.9 US tons
Inventory rating43.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length59 ft (18 m)
Longest span56 ft (17.2 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,150 (2023)
Projected traffic2,626 by 2046
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 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. 164 over Cedar Creek Trib. built?

It was built in 1991, making it 34 years old in 2025.

What condition is Ill. 164 over Cedar Creek Trib. 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 March 2022.

How much traffic does Ill. 164 over Cedar Creek Trib. carry?

About 3,150 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Ill. 164 over Cedar Creek Trib.?

The structure is 59 ft (18 m) long with a longest span of 56 ft (17.2 m) and a deck 35 ft wide.

Who owns Ill. 164 over Cedar Creek Trib.?

It is owned by the State Highway Agency.