US Bridges

I 64 over Harper Creek

Fair

Jefferson County, Illinois · 3.3 MI E Woodlan Int · Structure no. 041200400000000

Built
1974
51 years old
Condition
Fair
inspected January 2024
Type
Culvert
Concrete Continuous
Length
37 ft
3 main spans
Daily traffic
28,300
2023 count
Owner
State
State Highway Agency

About this bridge

I 64 over Harper Creek is a concrete continuous culvert carrying I 64 over Harper Creek in Jefferson County, Illinois. It was built in 1974, so it is 51 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 28,300 vehicles a day, roughly 30% of them trucks, projected to reach 29,391 by 2046. The structure is 37 ft (11.3 m) long. If it were closed, the detour would be 18 mi (29 km).

Location

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CarriesI 64
CrossesHarper Creek
Location3.3 MI E Woodlan Int
RouteInterstate 64
CountyJefferson County
StateIllinois
Coordinates38.34573, -88.977
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 inspectionJanuary 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.9 US tons
Inventory rating50 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20 + Mod
Structure length37 ft (11.3 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 traffic28,300 (2023)
Projected traffic29,391 by 2046
Trucks30%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 km)
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 64 over Harper Creek built?

It was built in 1974, making it 51 years old in 2025.

What condition is I 64 over Harper Creek 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 January 2024.

How much traffic does I 64 over Harper Creek carry?

About 28,300 vehicles per day (2023 count), of which roughly 30% are trucks.

How long is I 64 over Harper Creek?

The structure is 37 ft (11.3 m) long with a longest span of 12 ft (3.7 m).

Who owns I 64 over Harper Creek?

It is owned by the State Highway Agency.