US Bridges

Cth J over Trappe River

FairPosted for load

Marathon County, Wisconsin · 0.7M S JCT Cth G · Structure no. B37010200000000

Built
1964
61 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete Continuous
Length
94 ft
2 main spans
Daily traffic
621
2024 count
Owner
County
County Highway Agency

About this bridge

Cth J over Trappe River is a concrete continuous slab carrying Cth J over Trappe River in Marathon County, Wisconsin. It was built in 1964, so it is 61 years old, older 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for other load-capacity restriction.

It carries about 621 vehicles a day, projected to reach 541 by 2043. The structure is 94 ft (28.7 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCth J
CrossesTrappe River
Location0.7M S JCT Cth G
RouteCounty Highway 0J
CountyMarathon County
StateWisconsin
Coordinates45.08684, -89.49225
Functional classRural Major 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
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusPosted for other load-capacity restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being 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 rating37.8 US tons
Inventory rating23.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length94 ft (28.7 m)
Longest span47 ft (14.3 m)
Deck width30 ft (9 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic621 (2024)
Projected traffic541 by 2043
Trucks0%
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

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 Trappe River built?

It was built in 1964, making it 61 years old in 2025.

What condition is Cth J over Trappe 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 September 2024.

How much traffic does Cth J over Trappe River carry?

About 621 vehicles per day (2024 count).

How long is Cth J over Trappe River?

The structure is 94 ft (28.7 m) long with a longest span of 47 ft (14.3 m) and a deck 30 ft wide.

Who owns Cth J over Trappe River?

It is owned by the County Highway Agency.