US Bridges

Cth K over Willow River

Fair

St. Croix County, Wisconsin · 1.3M E JCT Sth 65 · Structure no. B55005800000000

Built
1964
61 years old, rebuilt 2000
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
170 ft
3 main spans
Daily traffic
3,000
2021 count
Owner
County
County Highway Agency

About this bridge

Cth K over Willow River is a steel continuous stringer/multi-beam or girder carrying Cth K over Willow River in St. Croix County, Wisconsin. It was built in 1964 and reconstructed in 2000, 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 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 3,000 vehicles a day, projected to reach 2,436 by 2042. The structure is 170 ft (51.7 m) long and 47 ft wide. If it were closed, the detour would be 5.6 mi (9 km).

Location

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CarriesCth K
CrossesWillow River
Location1.3M E JCT Sth 65
RouteCounty Highway 0K
CountySt. Croix County
StateWisconsin
Coordinates45.12262, -92.51523
Functional classRural Minor 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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating41.8 US tons
Inventory rating32.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length170 ft (51.7 m)
Longest span63 ft (19.2 m)
Deck width47 ft (14.2 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,000 (2021)
Projected traffic2,436 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5.6 mi (9 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 K over Willow River built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 2000.

What condition is Cth K over Willow 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 October 2023.

How much traffic does Cth K over Willow River carry?

About 3,000 vehicles per day (2021 count).

How long is Cth K over Willow River?

The structure is 170 ft (51.7 m) long with a longest span of 63 ft (19.2 m) and a deck 47 ft wide.

Who owns Cth K over Willow River?

It is owned by the County Highway Agency.