US Bridges

Cth T over ST Croix River 12

Fair

Douglas County, Wisconsin · 5.5M E JCT Sth 35 · Structure no. B16004000000000

Built
1976
49 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
206 ft
2 main spans
Daily traffic
483
2022 count
Owner
County
County Highway Agency

About this bridge

Cth T over ST Croix River 12 is a prestressed concrete continuous stringer/multi-beam or girder carrying Cth T over ST Croix River 12 in Douglas County, Wisconsin. It was built in 1976, so it is 49 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.

It carries about 483 vehicles a day, projected to reach 531 by 2043. The structure is 206 ft (62.7 m) long and 32 ft wide. If it were closed, the detour would be 20.5 mi (33 km).

Location

Open in Google Maps
CarriesCth T
CrossesST Croix River 12
Location5.5M E JCT Sth 35
RouteCounty Highway 0T
CountyDouglas County
StateWisconsin
Coordinates46.19628, -92.06186
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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79.1 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length206 ft (62.7 m)
Longest span101 ft (30.8 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic483 (2022)
Projected traffic531 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed20.5 mi (33 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 T over ST Croix River 12 built?

It was built in 1976, making it 49 years old in 2025.

What condition is Cth T over ST Croix River 12 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 August 2024.

How much traffic does Cth T over ST Croix River 12 carry?

About 483 vehicles per day (2022 count).

How long is Cth T over ST Croix River 12?

The structure is 206 ft (62.7 m) long with a longest span of 101 ft (30.8 m) and a deck 32 ft wide.

Who owns Cth T over ST Croix River 12?

It is owned by the County Highway Agency.