US Bridges

County Highway 37 over Trib.S.Henderson.Crk

Fair

Knox County, Illinois · SE-16-T12NR1E · Structure no. 048500400000000

Built
1960
65 years old
Condition
Fair
inspected February 2024
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
500
2022 count
Owner
County
County Highway Agency

About this bridge

County Highway 37 over Trib.S.Henderson.Crk is a concrete culvert carrying County Highway 37 over Trib.S.Henderson.Crk in Knox County, Illinois. It was built in 1960, so it is 65 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 500 vehicles a day, roughly 4% of them trucks, projected to reach 707 by 2046. The structure is 26 ft (7.9 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCounty Highway 37
CrossesTrib.S.Henderson.Crk
LocationSE-16-T12NR1E
RouteCounty Highway 0
CountyKnox County
StateIllinois
Coordinates41.0203, -90.39093
Functional classRural Minor 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
Channel and channel protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating105.7 US tons
Inventory rating63.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 15
Structure length26 ft (7.9 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 traffic500 (2022)
Projected traffic707 by 2046
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 County Highway 37 over Trib.S.Henderson.Crk built?

It was built in 1960, making it 65 years old in 2025.

What condition is County Highway 37 over Trib.S.Henderson.Crk 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 February 2024.

How much traffic does County Highway 37 over Trib.S.Henderson.Crk carry?

About 500 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is County Highway 37 over Trib.S.Henderson.Crk?

The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.7 m).

Who owns County Highway 37 over Trib.S.Henderson.Crk?

It is owned by the County Highway Agency.