US Bridges

Ill 146 over Mccorkle Creek

Good

Johnson County, Illinois · 0.3 MI E. of I-24 · Structure no. 044200300000000

Built
1971
54 years old
Condition
Good
inspected January 2025
Type
Culvert
Concrete Continuous
Length
47 ft
3 main spans
Daily traffic
2,700
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 146 over Mccorkle Creek is a concrete continuous culvert carrying Ill 146 over Mccorkle Creek in Johnson County, Illinois. It was built in 1971, so it is 54 years old, older 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 2,700 vehicles a day, roughly 4% of them trucks, projected to reach 2,835 by 2046. The structure is 47 ft (14.2 m) long. If it were closed, the detour would be 16.2 mi (26 km).

CarriesIll 146
CrossesMccorkle Creek
Location0.3 MI E. of I-24
RouteState Highway 146
Coordinates37.41413, -88.86334
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 inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating45 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length47 ft (14.2 m)
Longest span19 ft (5.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,700 (2023)
Projected traffic2,835 by 2046
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 Ill 146 over Mccorkle Creek built?

It was built in 1971, making it 54 years old in 2025.

What condition is Ill 146 over Mccorkle 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 January 2025.

How much traffic does Ill 146 over Mccorkle Creek carry?

About 2,700 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Ill 146 over Mccorkle Creek?

The structure is 47 ft (14.2 m) long with a longest span of 19 ft (5.8 m).

Who owns Ill 146 over Mccorkle Creek?

It is owned by the State Highway Agency.