US Bridges

Union HILLRD/FAU91 over Trib Schoenberger CR

Fair

St. Clair County, Illinois · 2.25 MI N Ill 161 · Structure no. 082306800000000

Built
1981
44 years old
Condition
Fair
inspected March 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
40 ft
1 main span
Daily traffic
8,650
2023 count
Owner
County
County Highway Agency

About this bridge

Union HILLRD/FAU91 over Trib Schoenberger CR is a prestressed concrete box beam or girders - multiple carrying Union HILLRD/FAU91 over Trib Schoenberger CR in St. Clair County, Illinois. It was built in 1981, so it is 44 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 8,650 vehicles a day, roughly 3% of them trucks, projected to reach 8,636 by 2046. The structure is 40 ft (12.2 m) long and 46 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesUnion HILLRD/FAU91
CrossesTrib Schoenberger CR
Location2.25 MI N Ill 161
CountySt. Clair County
StateIllinois
Coordinates38.58006, -90.00373
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.8 US tons
Inventory rating31.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span38 ft (11.6 m)
Deck width46 ft (14 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,650 (2023)
Projected traffic8,636 by 2046
Trucks3%
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

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 Union HILLRD/FAU91 over Trib Schoenberger CR built?

It was built in 1981, making it 44 years old in 2025.

What condition is Union HILLRD/FAU91 over Trib Schoenberger CR 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 Union HILLRD/FAU91 over Trib Schoenberger CR carry?

About 8,650 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Union HILLRD/FAU91 over Trib Schoenberger CR?

The structure is 40 ft (12.2 m) long with a longest span of 38 ft (11.6 m) and a deck 46 ft wide.

Who owns Union HILLRD/FAU91 over Trib Schoenberger CR?

It is owned by the County Highway Agency.