US Bridges

Troy Ofal RD/FAU91 over Engle Creek

Fair

St. Clair County, Illinois · Lincoln St. Ofallon · Structure no. 082307900000000

Built
1988
37 years old
Condition
Fair
inspected March 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
61 ft
1 main span
Daily traffic
6,500
2023 count
Owner
County
County Highway Agency

About this bridge

Troy Ofal RD/FAU91 over Engle Creek is a prestressed concrete box beam or girders - multiple carrying Troy Ofal RD/FAU91 over Engle Creek in St. Clair County, Illinois. It was built in 1988, so it is 37 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 6,500 vehicles a day, roughly 5% of them trucks, projected to reach 6,969 by 2046. The structure is 61 ft (18.6 m) long and 36 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

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CarriesTroy Ofal RD/FAU91
CrossesEngle Creek
LocationLincoln St. Ofallon
CountySt. Clair County
StateIllinois
Coordinates38.60726, -89.91092
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
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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
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

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length61 ft (18.6 m)
Longest span59 ft (18 m)
Deck width36 ft (11 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,500 (2023)
Projected traffic6,969 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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$348,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Troy Ofal RD/FAU91 over Engle Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is Troy Ofal RD/FAU91 over Engle Creek 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 March 2024.

How much traffic does Troy Ofal RD/FAU91 over Engle Creek carry?

About 6,500 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Troy Ofal RD/FAU91 over Engle Creek?

The structure is 61 ft (18.6 m) long with a longest span of 59 ft (18 m) and a deck 36 ft wide.

Who owns Troy Ofal RD/FAU91 over Engle Creek?

It is owned by the County Highway Agency.