US Bridges

Gonnam RD TR-32 over Waupecon CR

Fair

Grundy County, Illinois · .14 MI N Prairie RD · Structure no. 032487100000000

Built
1980
45 years old
Condition
Fair
inspected October 2024
Type
Channel Beam
Concrete
Length
86 ft
3 main spans
Daily traffic
100
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Gonnam RD TR-32 over Waupecon CR is a concrete channel beam carrying Gonnam RD TR-32 over Waupecon CR in Grundy County, Illinois. It was built in 1980, so it is 45 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 100 vehicles a day, roughly 17% of them trucks, projected to reach 180 by 2046. The structure is 86 ft (26.2 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesGonnam RD TR-32
CrossesWaupecon CR
Location.14 MI N Prairie RD
RouteCounty Highway 0
CountyGrundy County
StateIllinois
Coordinates41.21197, -88.54002
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating64.6 US tons
Inventory rating38.6 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length86 ft (26.2 m)
Longest span28 ft (8.5 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2024)
Projected traffic180 by 2046
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Gonnam RD TR-32 over Waupecon CR built?

It was built in 1980, making it 45 years old in 2025.

What condition is Gonnam RD TR-32 over Waupecon 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 Gonnam RD TR-32 over Waupecon CR carry?

About 100 vehicles per day (2024 count), of which roughly 17% are trucks.

How long is Gonnam RD TR-32 over Waupecon CR?

The structure is 86 ft (26.2 m) long with a longest span of 28 ft (8.5 m) and a deck 26 ft wide.

Who owns Gonnam RD TR-32 over Waupecon CR?

It is owned by the Town or Township Highway Agency.