US Bridges

I-74 over Rock Creek Tributary

Fair

Woodford County, Illinois · .3 MI E Congerville · Structure no. 102200300000000

Built
1965
60 years old
Condition
Fair
inspected March 2024
Type
Culvert
Concrete Continuous
Length
23 ft
2 main spans
Daily traffic
28,400
2023 count
Owner
State
State Highway Agency

About this bridge

I-74 over Rock Creek Tributary is a concrete continuous culvert carrying I-74 over Rock Creek Tributary in Woodford County, Illinois. It was built in 1965, so it is 60 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 28,400 vehicles a day, roughly 18% of them trucks, projected to reach 27,169 by 2046. The structure is 23 ft (6.9 m) long.

Location

Open in Google Maps
CarriesI-74
CrossesRock Creek Tributary
Location.3 MI E Congerville
RouteInterstate 74
CountyWoodford County
StateIllinois
Coordinates40.60936, -89.19248
Functional classRural Principal Arterial - Interstate

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 20
Structure length23 ft (6.9 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,400 (2023)
Projected traffic27,169 by 2046
Trucks18%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I-74 over Rock Creek Tributary built?

It was built in 1965, making it 60 years old in 2025.

What condition is I-74 over Rock Creek Tributary 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 2024.

How much traffic does I-74 over Rock Creek Tributary carry?

About 28,400 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is I-74 over Rock Creek Tributary?

The structure is 23 ft (6.9 m) long with a longest span of 10 ft (3 m).

Who owns I-74 over Rock Creek Tributary?

It is owned by the State Highway Agency.