US Bridges

Cth C over Johnson Creek

Fair

Marathon County, Wisconsin · 1.1M W JCT Cth X · Structure no. B37013700000000

Built
1969
56 years old, rebuilt 2021
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
61 ft
1 main span
Daily traffic
493
2023 count
Owner
County
County Highway Agency

About this bridge

Cth C over Johnson Creek is a prestressed concrete stringer/multi-beam or girder carrying Cth C over Johnson Creek in Marathon County, Wisconsin. It was built in 1969 and reconstructed in 2021, so it is 56 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 6 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 493 vehicles a day, projected to reach 490 by 2039. The structure is 61 ft (18.5 m) long and 37 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCth C
CrossesJohnson Creek
Location1.1M W JCT Cth X
RouteCounty Highway 0C
CountyMarathon County
StateWisconsin
Coordinates44.71413, -89.62986
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 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 alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating25 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length61 ft (18.5 m)
Longest span59 ft (18 m)
Deck width37 ft (11.3 m)
Roadway width34 ft (10.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic493 (2023)
Projected traffic490 by 2039
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 C over Johnson Creek built?

It was built in 1969, making it 56 years old in 2025. It was reconstructed in 2021.

What condition is Cth C over Johnson 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 August 2023.

How much traffic does Cth C over Johnson Creek carry?

About 493 vehicles per day (2023 count).

How long is Cth C over Johnson Creek?

The structure is 61 ft (18.5 m) long with a longest span of 59 ft (18 m) and a deck 37 ft wide.

Who owns Cth C over Johnson Creek?

It is owned by the County Highway Agency.