US Bridges

FAU 9218 over Prairie Dupont Ck

Fair

St. Clair County, Illinois · .10 MI S Ill 157 · Structure no. 082308600000000

Built
1992
33 years old
Condition
Fair
inspected April 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
241 ft
3 main spans
Daily traffic
2,300
2023 count
Owner
County
County Highway Agency

About this bridge

FAU 9218 over Prairie Dupont Ck is a prestressed concrete box beam or girders - multiple carrying FAU 9218 over Prairie Dupont Ck in St. Clair County, Illinois. It was built in 1992, so it is 33 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 2,300 vehicles a day, roughly 29% of them trucks, projected to reach 2,576 by 2046. The structure is 241 ft (73.4 m) long and 30 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesFAU 9218
CrossesPrairie Dupont Ck
Location.10 MI S Ill 157
CountySt. Clair County
StateIllinois
Coordinates38.5485, -90.16031
Functional classUrban Minor 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.6 US tons
Inventory rating35.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length241 ft (73.4 m)
Longest span80 ft (24.4 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,300 (2023)
Projected traffic2,576 by 2046
Trucks29%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.1 million
NavigationNo navigation control on waterway

Frequently asked questions

When was FAU 9218 over Prairie Dupont Ck built?

It was built in 1992, making it 33 years old in 2025.

What condition is FAU 9218 over Prairie Dupont 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 April 2024.

How much traffic does FAU 9218 over Prairie Dupont Ck carry?

About 2,300 vehicles per day (2023 count), of which roughly 29% are trucks.

How long is FAU 9218 over Prairie Dupont Ck?

The structure is 241 ft (73.4 m) long with a longest span of 80 ft (24.4 m) and a deck 30 ft wide.

Who owns FAU 9218 over Prairie Dupont Ck?

It is owned by the County Highway Agency.