US Bridges

FAS-717 (CH-23) over Kaskaskia River

Good

Fayette County, Illinois · 4 MI W Shobonier · Structure no. 026329300000000

Built
1978
47 years old
Condition
Good
inspected January 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
194 ft
3 main spans
Daily traffic
200
2023 count
Owner
County
County Highway Agency

About this bridge

FAS-717 (CH-23) over Kaskaskia River is a prestressed concrete box beam or girders - multiple carrying FAS-717 (CH-23) over Kaskaskia River in Fayette County, Illinois. It was built in 1978, so it is 47 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 200 vehicles a day, roughly 12% of them trucks, projected to reach 230 by 2046. The structure is 194 ft (59.1 m) long and 31 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

Open in Google Maps
CarriesFAS-717 (CH-23)
CrossesKaskaskia River
Location4 MI W Shobonier
RouteCounty Highway 0
CountyFayette County
StateIllinois
Coordinates38.86906, -89.15999
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length194 ft (59.1 m)
Longest span83 ft (25.3 m)
Deck width31 ft (9.3 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2023)
Projected traffic230 by 2046
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 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-717 (CH-23) over Kaskaskia River built?

It was built in 1978, making it 47 years old in 2025.

What condition is FAS-717 (CH-23) over Kaskaskia River 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 2023.

How much traffic does FAS-717 (CH-23) over Kaskaskia River carry?

About 200 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is FAS-717 (CH-23) over Kaskaskia River?

The structure is 194 ft (59.1 m) long with a longest span of 83 ft (25.3 m) and a deck 31 ft wide.

Who owns FAS-717 (CH-23) over Kaskaskia River?

It is owned by the County Highway Agency.