US Bridges

Minooka RD FAU400 over Trib to Aux Sable CR

Poor

Grundy County, Illinois · .32 MI E Brisbin RD · Structure no. 032390100000000

Built
1984
41 years old
Condition
Poor
inspected October 2024
Type
Channel Beam
Concrete
Length
39 ft
1 main span
Daily traffic
625
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Minooka RD FAU400 over Trib to Aux Sable CR is a concrete channel beam carrying Minooka RD FAU400 over Trib to Aux Sable CR in Grundy 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 625 vehicles a day, roughly 24% of them trucks, projected to reach 720 by 2046. The structure is 39 ft (11.9 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesMinooka RD FAU400
CrossesTrib to Aux Sable CR
Location.32 MI E Brisbin RD
CountyGrundy County
StateIllinois
Coordinates41.446, -88.35909
Functional classUrban Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.5 US tons
Inventory rating30.8 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length39 ft (11.9 m)
Longest span38 ft (11.6 m)
Deck width30 ft (9.1 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic625 (2024)
Projected traffic720 by 2046
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 Trib to Aux Sable CR built?

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

What condition is Minooka RD FAU400 over Trib to Aux Sable CR in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2024.

How much traffic does Minooka RD FAU400 over Trib to Aux Sable CR carry?

About 625 vehicles per day (2024 count), of which roughly 24% are trucks.

How long is Minooka RD FAU400 over Trib to Aux Sable CR?

The structure is 39 ft (11.9 m) long with a longest span of 38 ft (11.6 m) and a deck 30 ft wide.

Who owns Minooka RD FAU400 over Trib to Aux Sable CR?

It is owned by the Town or Township Highway Agency.