US Bridges

Ch 23 over Trib Langan Creek

Good

Iroquois County, Illinois · 35MI W Clifton · Structure no. 038360600000000

Built
1976
49 years old
Condition
Good
inspected September 2023
Type
Slab
Concrete
Length
76 ft
3 main spans
Daily traffic
350
2022 count
Owner
County
County Highway Agency

About this bridge

Ch 23 over Trib Langan Creek is a concrete slab carrying Ch 23 over Trib Langan Creek in Iroquois County, Illinois. It was built in 1976, so it is 49 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 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 350 vehicles a day, roughly 34% of them trucks, projected to reach 328 by 2046. The structure is 76 ft (23.2 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCh 23
CrossesTrib Langan Creek
Location35MI W Clifton
RouteCounty Highway 0
Coordinates40.93073, -88.00079
Functional classRural Major Collector

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 protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.7 US tons
Inventory rating32.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length76 ft (23.2 m)
Longest span26 ft (7.9 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (2022)
Projected traffic328 by 2046
Trucks34%
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 Ch 23 over Trib Langan Creek built?

It was built in 1976, making it 49 years old in 2025.

What condition is Ch 23 over Trib Langan 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 2023.

How much traffic does Ch 23 over Trib Langan Creek carry?

About 350 vehicles per day (2022 count), of which roughly 34% are trucks.

How long is Ch 23 over Trib Langan Creek?

The structure is 76 ft (23.2 m) long with a longest span of 26 ft (7.9 m) and a deck 30 ft wide.

Who owns Ch 23 over Trib Langan Creek?

It is owned by the County Highway Agency.