US Bridges

FAU 9206-WATER ST over Prairie Dupont Canal

Fair

St. Clair County, Illinois · 1.5M S Ill 157 · Structure no. 082027300000000

Built
1984
41 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
351 ft
3 main spans
Daily traffic
1,350
2023 count
Owner
State
State Highway Agency

About this bridge

FAU 9206-WATER ST over Prairie Dupont Canal is a steel continuous stringer/multi-beam or girder carrying FAU 9206-WATER ST over Prairie Dupont Canal in St. Clair County, Illinois. It was built in 1984, so it is 41 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 1,350 vehicles a day, roughly 6% of them trucks, projected to reach 1,717 by 2046. The structure is 351 ft (107 m) long and 31 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesFAU 9206-WATER ST
CrossesPrairie Dupont Canal
Location1.5M S Ill 157
CountySt. Clair County
StateIllinois
Coordinates38.55216, -90.2013
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60.7 US tons
Inventory rating36.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length351 ft (107 m)
Longest span137 ft (41.8 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,350 (2023)
Projected traffic1,717 by 2046
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 FAU 9206-WATER ST over Prairie Dupont Canal built?

It was built in 1984, making it 41 years old in 2025.

What condition is FAU 9206-WATER ST over Prairie Dupont Canal 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 August 2024.

How much traffic does FAU 9206-WATER ST over Prairie Dupont Canal carry?

About 1,350 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is FAU 9206-WATER ST over Prairie Dupont Canal?

The structure is 351 ft (107 m) long with a longest span of 137 ft (41.8 m) and a deck 31 ft wide.

Who owns FAU 9206-WATER ST over Prairie Dupont Canal?

It is owned by the State Highway Agency.