US Bridges

Cth Kk over Johnstown Creek

Fair

Rock County, Wisconsin · 2.3M N JCT Cth M · Structure no. P53092100000000

Built
1977
48 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete
Length
33 ft
1 main span
Daily traffic
180
2024 count
Owner
County
County Highway Agency

About this bridge

Cth Kk over Johnstown Creek is a concrete slab carrying Cth Kk over Johnstown Creek in Rock County, Wisconsin. It was built in 1977, so it is 48 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 180 vehicles a day, projected to reach 193 by 2043. The structure is 33 ft (10.1 m) long and 34 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesCth Kk
CrossesJohnstown Creek
Location2.3M N JCT Cth M
RouteCounty Highway 0KK
CountyRock County
StateWisconsin
Coordinates42.74164, -88.85711
Functional classRural Local

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84.5 US tons
Inventory rating50 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span31 ft (9.5 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic180 (2024)
Projected traffic193 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Cth Kk over Johnstown Creek built?

It was built in 1977, making it 48 years old in 2025.

What condition is Cth Kk over Johnstown 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 Cth Kk over Johnstown Creek carry?

About 180 vehicles per day (2024 count).

How long is Cth Kk over Johnstown Creek?

The structure is 33 ft (10.1 m) long with a longest span of 31 ft (9.5 m) and a deck 34 ft wide.

Who owns Cth Kk over Johnstown Creek?

It is owned by the County Highway Agency.