US Bridges

FAP-322(US-51/US-4 over Kaskaskia River

Fair

Fayette County, Illinois · Ecl Vandalia · Structure no. 026003400000000

Built
1962
63 years old, rebuilt 2002
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
428 ft
4 main spans
Daily traffic
6,650
2023 count
Owner
State
State Highway Agency

About this bridge

FAP-322(US-51/US-4 over Kaskaskia River is a steel continuous stringer/multi-beam or girder carrying FAP-322(US-51/US-4 over Kaskaskia River in Fayette County, Illinois. It was built in 1962 and reconstructed in 2002, so it is 63 years old, older 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 6,650 vehicles a day, roughly 13% of them trucks, projected to reach 6,834 by 2046. The structure is 428 ft (130.5 m) long and 67 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesFAP-322(US-51/US-4
CrossesKaskaskia River
LocationEcl Vandalia
RouteU.S. Route 40
CountyFayette County
StateIllinois
Coordinates38.96052, -89.08912
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.8 US tons
Inventory rating46.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4 (+2 approach)
Design loadHS 20
Structure length428 ft (130.5 m)
Longest span108 ft (32.9 m)
Deck width67 ft (20.3 m)
Roadway width59 ft (18 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,650 (2023)
Projected traffic6,834 by 2046
Trucks13%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$4 million
NavigationNo navigation control on waterway

Frequently asked questions

When was FAP-322(US-51/US-4 over Kaskaskia River built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 2002.

What condition is FAP-322(US-51/US-4 over Kaskaskia River 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 October 2024.

How much traffic does FAP-322(US-51/US-4 over Kaskaskia River carry?

About 6,650 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is FAP-322(US-51/US-4 over Kaskaskia River?

The structure is 428 ft (130.5 m) long with a longest span of 108 ft (32.9 m) and a deck 67 ft wide.

Who owns FAP-322(US-51/US-4 over Kaskaskia River?

It is owned by the State Highway Agency.