US Bridges

Cth a over Willow River

Poor

St. Croix County, Wisconsin · 0.1M S JCT Cth I · Structure no. B55007200000000

Built
1980
45 years old
Condition
Poor
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
188 ft
2 main spans
Daily traffic
9,200
2022 count
Owner
County
County Highway Agency

About this bridge

Cth a over Willow River is a prestressed concrete continuous stringer/multi-beam or girder carrying Cth a over Willow River in St. Croix County, Wisconsin. It was built in 1980, so it is 45 years old, older than the Wisconsin average of 40.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 9,200 vehicles a day, projected to reach 8,703 by 2042. The structure is 188 ft (57.3 m) long and 41 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesCth a
CrossesWillow River
Location0.1M S JCT Cth I
RouteCounty Highway 0A
CountySt. Croix County
StateWisconsin
Coordinates45.02494, -92.65608
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
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 rating75.6 US tons
Inventory rating37.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length188 ft (57.3 m)
Longest span91 ft (27.8 m)
Deck width41 ft (12.5 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,200 (2022)
Projected traffic8,703 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed9.9 mi (16 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.2 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Cth a over Willow River built?

It was built in 1980, making it 45 years old in 2025.

What condition is Cth a over Willow River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2023.

How much traffic does Cth a over Willow River carry?

About 9,200 vehicles per day (2022 count).

How long is Cth a over Willow River?

The structure is 188 ft (57.3 m) long with a longest span of 91 ft (27.8 m) and a deck 41 ft wide.

Who owns Cth a over Willow River?

It is owned by the County Highway Agency.