US Bridges

Il 146 over Little Cache Creek

Good

Johnson County, Illinois · 0.1 MI E of US 45 · Structure no. 044006300000000

Built
2022
3 years old
Condition
Good
inspected September 2024
Type
Slab
Concrete Continuous
Length
115 ft
3 main spans
Daily traffic
6,950
2023 count
Owner
State
State Highway Agency

About this bridge

Il 146 over Little Cache Creek is a concrete continuous slab carrying Il 146 over Little Cache Creek in Johnson County, Illinois. It was built in 2022, so it is 3 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,950 vehicles a day, roughly 7% of them trucks, projected to reach 7,298 by 2046. The structure is 115 ft (35.1 m) long and 43 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesIl 146
CrossesLittle Cache Creek
Location0.1 MI E of US 45
RouteState Highway 146
CountyJohnson County
StateIllinois
Coordinates37.41539, -88.89113
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable 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 rating51.5 US tons
Inventory rating37.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length115 ft (35.1 m)
Longest span37 ft (11.3 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,950 (2023)
Projected traffic7,298 by 2046
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 146 over Little Cache Creek built?

It was built in 2022, making it 3 years old in 2025.

What condition is Il 146 over Little Cache Creek 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 September 2024.

How much traffic does Il 146 over Little Cache Creek carry?

About 6,950 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Il 146 over Little Cache Creek?

The structure is 115 ft (35.1 m) long with a longest span of 37 ft (11.3 m) and a deck 43 ft wide.

Who owns Il 146 over Little Cache Creek?

It is owned by the State Highway Agency.