US Bridges

TR-3B Minooka RD over Trib to Aux Sable CR

Fair

Grundy County, Illinois · .38 MI W Brisbin RD · Structure no. 032377000000000

Built
1976
49 years old
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
34 ft
1 main span
Daily traffic
600
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR-3B Minooka RD over Trib to Aux Sable CR is a prestressed concrete box beam or girders - multiple carrying TR-3B Minooka RD over Trib to Aux Sable CR in Grundy County, Illinois. It was built in 1976, so it is 49 years old, older 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 600 vehicles a day, roughly 24% of them trucks, projected to reach 660 by 2046. The structure is 34 ft (10.4 m) long and 26 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesTR-3B Minooka RD
CrossesTrib to Aux Sable CR
Location.38 MI W Brisbin RD
RouteCounty Highway 0
CountyGrundy County
StateIllinois
Coordinates41.44589, -88.37248
Functional classRural Local

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 protection7 GoodSome minor problems.
Last inspectionOctober 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum 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 length34 ft (10.4 m)
Longest span33 ft (10.1 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (2024)
Projected traffic660 by 2046
Trucks24%
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

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 TR-3B Minooka RD over Trib to Aux Sable CR built?

It was built in 1976, making it 49 years old in 2025.

What condition is TR-3B Minooka RD over Trib to Aux Sable 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 October 2024.

How much traffic does TR-3B Minooka RD over Trib to Aux Sable CR carry?

About 600 vehicles per day (2024 count), of which roughly 24% are trucks.

How long is TR-3B Minooka RD over Trib to Aux Sable CR?

The structure is 34 ft (10.4 m) long with a longest span of 33 ft (10.1 m) and a deck 26 ft wide.

Who owns TR-3B Minooka RD over Trib to Aux Sable CR?

It is owned by the Town or Township Highway Agency.