US Bridges

Sth 29 over Cady Creek

Fair

St. Croix County, Wisconsin · 1.2M E JCT Sth 128 to N · Structure no. B55007000000000

Built
1979
46 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete Continuous
Length
22 ft
3 main spans
Daily traffic
1,600
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 29 over Cady Creek is a concrete continuous culvert carrying Sth 29 over Cady Creek in St. Croix County, Wisconsin. It was built in 1979, so it is 46 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 1,600 vehicles a day, roughly 10% of them trucks, projected to reach 1,920 by 2043. The structure is 22 ft (6.8 m) long. If it were closed, the detour would be 35.4 mi (57 km).

Location

Open in Google Maps
CarriesSth 29
CrossesCady Creek
Location1.2M E JCT Sth 128 to N
RouteState Highway 29
CountySt. Croix County
StateWisconsin
Coordinates44.87234, -92.17389
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 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
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length22 ft (6.8 m)
Longest span6 ft (1.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,600 (2022)
Projected traffic1,920 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed35.4 mi (57 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Sth 29 over Cady Creek built?

It was built in 1979, making it 46 years old in 2025.

What condition is Sth 29 over Cady Creek 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 September 2024.

How much traffic does Sth 29 over Cady Creek carry?

About 1,600 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Sth 29 over Cady Creek?

The structure is 22 ft (6.8 m) long with a longest span of 6 ft (1.8 m).

Who owns Sth 29 over Cady Creek?

It is owned by the State Highway Agency.