US Bridges

US 34 over Trib to Cedar CR

Fair

Warren County, Illinois · 4 MI E of Monmouth · Structure no. 094200200000000

Built
1979
46 years old
Condition
Fair
inspected December 2023
Type
Culvert
Concrete Continuous
Length
27 ft
2 main spans
Daily traffic
8,050
2023 count
Owner
State
State Highway Agency

About this bridge

US 34 over Trib to Cedar CR is a concrete continuous culvert carrying US 34 over Trib to Cedar CR in Warren County, Illinois. It was built in 1979, so it is 46 years old, older 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 5 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 8,050 vehicles a day, roughly 20% of them trucks, projected to reach 11,009 by 2046. The structure is 27 ft (8.2 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 34
CrossesTrib to Cedar CR
Location4 MI E of Monmouth
RouteU.S. Route 34
CountyWarren County
StateIllinois
Coordinates40.92526, -90.56416
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating107.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length27 ft (8.2 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,050 (2023)
Projected traffic11,009 by 2046
Trucks20%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 US 34 over Trib to Cedar CR built?

It was built in 1979, making it 46 years old in 2025.

What condition is US 34 over Trib to Cedar 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 December 2023.

How much traffic does US 34 over Trib to Cedar CR carry?

About 8,050 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is US 34 over Trib to Cedar CR?

The structure is 27 ft (8.2 m) long with a longest span of 12 ft (3.7 m).

Who owns US 34 over Trib to Cedar CR?

It is owned by the State Highway Agency.