US Bridges

Ch 23 over Trib to Mill Ck

Fair

Jersey County, Illinois · 2.5 MI E of Elsah · Structure no. 042400200000000

Built
1983
42 years old
Condition
Fair
inspected February 2023
Type
Channel Beam
Concrete
Length
86 ft
3 main spans
Daily traffic
575
2022 count
Owner
County
County Highway Agency

About this bridge

Ch 23 over Trib to Mill Ck is a concrete channel beam carrying Ch 23 over Trib to Mill Ck in Jersey County, Illinois. It was built in 1983, so it is 42 years old, younger 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 6 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 575 vehicles a day, roughly 7% of them trucks, projected to reach 455 by 2046. The structure is 86 ft (26.2 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesCh 23
CrossesTrib to Mill Ck
Location2.5 MI E of Elsah
RouteCounty Highway 0
Coordinates38.95669, -90.30475
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length86 ft (26.2 m)
Longest span28 ft (8.5 m)
Deck width30 ft (9.2 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic575 (2022)
Projected traffic455 by 2046
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 to Mill Ck built?

It was built in 1983, making it 42 years old in 2025.

What condition is Ch 23 over Trib to Mill Ck 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 2023.

How much traffic does Ch 23 over Trib to Mill Ck carry?

About 575 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Ch 23 over Trib to Mill Ck?

The structure is 86 ft (26.2 m) long with a longest span of 28 ft (8.5 m) and a deck 30 ft wide.

Who owns Ch 23 over Trib to Mill Ck?

It is owned by the County Highway Agency.