US Bridges

Cth Tt over Kinnickinnic River

Good

St. Croix County, Wisconsin · 2.3M E JCT Sth 65 · Structure no. P55092100000000

Built
1939
86 years old, rebuilt 1978
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
55 ft
1 main span
Daily traffic
1,688
2022 count
Owner
County
County Highway Agency

About this bridge

Cth Tt over Kinnickinnic River is a steel stringer/multi-beam or girder carrying Cth Tt over Kinnickinnic River in St. Croix County, Wisconsin. It was built in 1939 and reconstructed in 1978, so it is 86 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 1,688 vehicles a day, projected to reach 1,856 by 2042. The structure is 55 ft (16.7 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesCth Tt
CrossesKinnickinnic River
Location2.3M E JCT Sth 65
RouteCounty Highway 0TT
CountySt. Croix County
StateWisconsin
Coordinates44.97812, -92.51141
Functional classRural Minor 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 inspectionOctober 2023
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 rating36.4 US tons
Inventory rating21.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length55 ft (16.7 m)
Longest span53 ft (16.2 m)
Deck width36 ft (11.1 m)
Roadway width36 ft (10.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,688 (2022)
Projected traffic1,856 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Tt over Kinnickinnic River built?

It was built in 1939, making it 86 years old in 2025. It was reconstructed in 1978.

What condition is Cth Tt over Kinnickinnic 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 October 2023.

How much traffic does Cth Tt over Kinnickinnic River carry?

About 1,688 vehicles per day (2022 count).

How long is Cth Tt over Kinnickinnic River?

The structure is 55 ft (16.7 m) long with a longest span of 53 ft (16.2 m) and a deck 36 ft wide.

Who owns Cth Tt over Kinnickinnic River?

It is owned by the County Highway Agency.