US Bridges

Minooka RD/FAU400 over Aux Sable Creek

Fair

Grundy County, Illinois · 2.0 MI W of Minooka · Structure no. 032301500000000

Built
1993
32 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
173 ft
3 main spans
Daily traffic
3,350
2024 count
Owner
County
County Highway Agency

About this bridge

Minooka RD/FAU400 over Aux Sable Creek is a steel continuous stringer/multi-beam or girder carrying Minooka RD/FAU400 over Aux Sable Creek in Grundy County, Illinois. It was built in 1993, so it is 32 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 3,350 vehicles a day, roughly 8% of them trucks, projected to reach 3,480 by 2046. The structure is 173 ft (52.6 m) long and 33 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesMinooka RD/FAU400
CrossesAux Sable Creek
Location2.0 MI W of Minooka
CountyGrundy County
StateIllinois
Coordinates41.45406, -88.30976
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.1 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 length173 ft (52.6 m)
Longest span66 ft (20.1 m)
Deck width33 ft (10 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,350 (2024)
Projected traffic3,480 by 2046
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 Minooka RD/FAU400 over Aux Sable Creek built?

It was built in 1993, making it 32 years old in 2025.

What condition is Minooka RD/FAU400 over Aux Sable 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 October 2024.

How much traffic does Minooka RD/FAU400 over Aux Sable Creek carry?

About 3,350 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is Minooka RD/FAU400 over Aux Sable Creek?

The structure is 173 ft (52.6 m) long with a longest span of 66 ft (20.1 m) and a deck 33 ft wide.

Who owns Minooka RD/FAU400 over Aux Sable Creek?

It is owned by the County Highway Agency.