US Bridges

FAS-1818 (CH-23) over Flood Relief Struct

Fair

White County, Illinois · 1 MI S Carmi · Structure no. 097317800000000

Built
1987
38 years old
Condition
Fair
inspected January 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
253 ft
5 main spans
Daily traffic
650
2024 count
Owner
County
County Highway Agency

About this bridge

FAS-1818 (CH-23) over Flood Relief Struct is a prestressed concrete box beam or girders - multiple carrying FAS-1818 (CH-23) over Flood Relief Struct in White County, Illinois. It was built in 1987, so it is 38 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 5 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 650 vehicles a day, roughly 10% of them trucks, projected to reach 455 by 2046. The structure is 253 ft (77.1 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesFAS-1818 (CH-23)
CrossesFlood Relief Struct
Location1 MI S Carmi
RouteCounty Highway 0
Coordinates38.06528, -88.15706
Functional classRural Major 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans5
Design loadHS 20
Structure length253 ft (77.1 m)
Longest span49 ft (14.9 m)
Deck width28 ft (8.6 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic650 (2024)
Projected traffic455 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 FAS-1818 (CH-23) over Flood Relief Struct built?

It was built in 1987, making it 38 years old in 2025.

What condition is FAS-1818 (CH-23) over Flood Relief Struct 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 January 2025.

How much traffic does FAS-1818 (CH-23) over Flood Relief Struct carry?

About 650 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is FAS-1818 (CH-23) over Flood Relief Struct?

The structure is 253 ft (77.1 m) long with a longest span of 49 ft (14.9 m) and a deck 28 ft wide.

Who owns FAS-1818 (CH-23) over Flood Relief Struct?

It is owned by the County Highway Agency.