US Bridges

Cth N over Plum Creek

Good

Vilas County, Wisconsin · 1.2M W JCT Sth 155 · Structure no. B63003000000000

Built
2022
3 years old
Condition
Good
inspected August 2024
Type
Slab
Concrete
Length
39 ft
1 main span
Daily traffic
1,626
2024 count
Owner
County
County Highway Agency

About this bridge

Cth N over Plum Creek is a concrete slab carrying Cth N over Plum Creek in Vilas County, Wisconsin. It was built in 2022, so it is 3 years old, younger than the Wisconsin average of 40.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,626 vehicles a day, roughly 10% of them trucks, projected to reach 1,794 by 2042. The structure is 39 ft (11.8 m) long and 35 ft wide. If it were closed, the detour would be 15.5 mi (25 km).

CarriesCth N
CrossesPlum Creek
Location1.2M W JCT Sth 155
RouteCounty Highway 0
Coordinates45.98967, -89.55411
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
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 rating53.9 US tons
Inventory rating41.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length39 ft (11.8 m)
Longest span36 ft (11 m)
Deck width35 ft (10.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,626 (2024)
Projected traffic1,794 by 2042
Trucks10%
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 N over Plum Creek built?

It was built in 2022, making it 3 years old in 2025.

What condition is Cth N over Plum Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2024.

How much traffic does Cth N over Plum Creek carry?

About 1,626 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Cth N over Plum Creek?

The structure is 39 ft (11.8 m) long with a longest span of 36 ft (11 m) and a deck 35 ft wide.

Who owns Cth N over Plum Creek?

It is owned by the County Highway Agency.