US Bridges

Cth Kw over Onion River

Fair

Sheboygan County, Wisconsin · 0.1M S JCT Cth G to E · Structure no. P59015900000000

Built
1959
66 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
87 ft
2 main spans
Daily traffic
205
2022 count
Owner
County
County Highway Agency

About this bridge

Cth Kw over Onion River is a concrete stringer/multi-beam or girder carrying Cth Kw over Onion River in Sheboygan County, Wisconsin. It was built in 1959, so it is 66 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 205 vehicles a day, projected to reach 225 by 2042. The structure is 87 ft (26.5 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCth Kw
CrossesOnion River
Location0.1M S JCT Cth G to E
RouteCounty Highway 0KW
CountySheboygan County
StateWisconsin
Coordinates43.58275, -87.8504
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
Deck7 GoodSome minor problems.
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 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 rating55.8 US tons
Inventory rating30.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length87 ft (26.5 m)
Longest span42 ft (12.8 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic205 (2022)
Projected traffic225 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 Kw over Onion River built?

It was built in 1959, making it 66 years old in 2025.

What condition is Cth Kw over Onion River 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 April 2023.

How much traffic does Cth Kw over Onion River carry?

About 205 vehicles per day (2022 count).

How long is Cth Kw over Onion River?

The structure is 87 ft (26.5 m) long with a longest span of 42 ft (12.8 m) and a deck 31 ft wide.

Who owns Cth Kw over Onion River?

It is owned by the County Highway Agency.