US Bridges

Cth K over Nsp Canal

Poor

Jackson County, Wisconsin · 0.4M S JCT Cth E · Structure no. B27006900000000

Built
1973
52 years old
Condition
Poor
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
146 ft
2 main spans
Daily traffic
1,100
2022 count
Owner
County
County Highway Agency

About this bridge

Cth K over Nsp Canal is a prestressed concrete continuous stringer/multi-beam or girder carrying Cth K over Nsp Canal in Jackson County, Wisconsin. It was built in 1973, so it is 52 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 1,100 vehicles a day, projected to reach 886 by 2042. The structure is 146 ft (44.4 m) long and 38 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesCth K
CrossesNsp Canal
Location0.4M S JCT Cth E
RouteCounty Highway 0K
CountyJackson County
StateWisconsin
Coordinates44.40914, -90.73244
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.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating71.7 US tons
Inventory rating28.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length146 ft (44.4 m)
Longest span73 ft (22.2 m)
Deck width38 ft (11.5 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,100 (2022)
Projected traffic886 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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$780,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Cth K over Nsp Canal built?

It was built in 1973, making it 52 years old in 2025.

What condition is Cth K over Nsp Canal 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 September 2023.

How much traffic does Cth K over Nsp Canal carry?

About 1,100 vehicles per day (2022 count).

How long is Cth K over Nsp Canal?

The structure is 146 ft (44.4 m) long with a longest span of 73 ft (22.2 m) and a deck 38 ft wide.

Who owns Cth K over Nsp Canal?

It is owned by the County Highway Agency.