US Bridges

Il 81 over Camp Creek Trib.

Good

Henry County, Illinois · .7 MI W of Cambridge · Structure no. 037201800000000

Built
1994
31 years old
Condition
Good
inspected March 2022
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
1,650
2023 count
Owner
State
State Highway Agency

About this bridge

Il 81 over Camp Creek Trib. is a concrete culvert carrying Il 81 over Camp Creek Trib. in Henry County, Illinois. It was built in 1994, so it is 31 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,650 vehicles a day, roughly 11% of them trucks, projected to reach 2,052 by 2046. The structure is 26 ft (8 m) long and 45 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

Open in Google Maps
CarriesIl 81
CrossesCamp Creek Trib.
Location.7 MI W of Cambridge
RouteState Highway 81
CountyHenry County
StateIllinois
Coordinates41.30202, -90.21621
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 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 geometry5: 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 rating71.4 US tons
Inventory rating42.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length26 ft (8 m)
Longest span13 ft (3.9 m)
Deck width45 ft (13.7 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,650 (2023)
Projected traffic2,052 by 2046
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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 Il 81 over Camp Creek Trib. built?

It was built in 1994, making it 31 years old in 2025.

What condition is Il 81 over Camp Creek Trib. in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2022.

How much traffic does Il 81 over Camp Creek Trib. carry?

About 1,650 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is Il 81 over Camp Creek Trib.?

The structure is 26 ft (8 m) long with a longest span of 13 ft (3.9 m) and a deck 45 ft wide.

Who owns Il 81 over Camp Creek Trib.?

It is owned by the State Highway Agency.