US Bridges

Cth J over Thornapple River

Fair

Rusk County, Wisconsin · 2.3M N JCT Cth I--32 · Structure no. B54006900000000

Built
1994
31 years old
Condition
Fair
inspected July 2024
Type
Slab
Concrete Continuous
Length
90 ft
2 main spans
Daily traffic
227
2024 count
Owner
County
County Highway Agency

About this bridge

Cth J over Thornapple River is a concrete continuous slab carrying Cth J over Thornapple River in Rusk County, Wisconsin. It was built in 1994, so it is 31 years old, younger than the Wisconsin average of 40.3 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 227 vehicles a day, roughly 5% of them trucks, projected to reach 238 by 2043. The structure is 90 ft (27.4 m) long and 30 ft wide. If it were closed, the detour would be 15.5 mi (25 km).

CarriesCth J
CrossesThornapple River
Location2.3M N JCT Cth I--32
RouteCounty Highway 0J
Coordinates45.58117, -91.0355
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 48 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 adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.5 US tons
Inventory rating41.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length90 ft (27.4 m)
Longest span44 ft (13.4 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic227 (2024)
Projected traffic238 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed15.5 mi (25 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 Cth J over Thornapple River built?

It was built in 1994, making it 31 years old in 2025.

What condition is Cth J over Thornapple River 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 July 2024.

How much traffic does Cth J over Thornapple River carry?

About 227 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Cth J over Thornapple River?

The structure is 90 ft (27.4 m) long with a longest span of 44 ft (13.4 m) and a deck 30 ft wide.

Who owns Cth J over Thornapple River?

It is owned by the County Highway Agency.