US Bridges

Cth a over Willow River

Good

St. Croix County, Wisconsin · 1.2M N JCT Cth E · Structure no. B55005100000000

Built
1959
66 years old, rebuilt 1999
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
147 ft
3 main spans
Daily traffic
4,958
2022 count
Owner
County
County Highway Agency

About this bridge

Cth a over Willow River is a steel continuous stringer/multi-beam or girder carrying Cth a over Willow River in St. Croix County, Wisconsin. It was built in 1959 and reconstructed in 1999, so it is 66 years old, older 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 4,958 vehicles a day, projected to reach 5,453 by 2042. The structure is 147 ft (44.8 m) long and 29 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCth a
CrossesWillow River
Location1.2M N JCT Cth E
RouteCounty Highway 0A
CountySt. Croix County
StateWisconsin
Coordinates45.04543, -92.62282
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length147 ft (44.8 m)
Longest span55 ft (16.8 m)
Deck width29 ft (8.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,958 (2022)
Projected traffic5,453 by 2042
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 a over Willow River built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1999.

What condition is Cth a over Willow River 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 November 2023.

How much traffic does Cth a over Willow River carry?

About 4,958 vehicles per day (2022 count).

How long is Cth a over Willow River?

The structure is 147 ft (44.8 m) long with a longest span of 55 ft (16.8 m) and a deck 29 ft wide.

Who owns Cth a over Willow River?

It is owned by the County Highway Agency.