US Bridges

Cth Cw (mapleton R over Ashippun River

Fair

Waukesha County, Wisconsin · 0.1M W JCT Sth 67 · Structure no. B67007500000000

Built
1963
62 years old, rebuilt 1995
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
42 ft
1 main span
Daily traffic
1,700
2022 count
Owner
County
County Highway Agency

About this bridge

Cth Cw (mapleton R over Ashippun River is a prestressed concrete stringer/multi-beam or girder carrying Cth Cw (mapleton R over Ashippun River in Waukesha County, Wisconsin. It was built in 1963 and reconstructed in 1995, so it is 62 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 1,700 vehicles a day, projected to reach 2,040 by 2042. The structure is 42 ft (12.7 m) long and 41 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCth Cw (mapleton R
CrossesAshippun River
Location0.1M W JCT Sth 67
RouteCounty Highway 0CW
CountyWaukesha County
StateWisconsin
Coordinates43.17966, -88.5099
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 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
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.8 US tons
Inventory rating53.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length42 ft (12.7 m)
Longest span40 ft (12.2 m)
Deck width41 ft (12.5 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,700 (2022)
Projected traffic2,040 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 Cw (mapleton R over Ashippun River built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1995.

What condition is Cth Cw (mapleton R over Ashippun 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 December 2024.

How much traffic does Cth Cw (mapleton R over Ashippun River carry?

About 1,700 vehicles per day (2022 count).

How long is Cth Cw (mapleton R over Ashippun River?

The structure is 42 ft (12.7 m) long with a longest span of 40 ft (12.2 m) and a deck 41 ft wide.

Who owns Cth Cw (mapleton R over Ashippun River?

It is owned by the County Highway Agency.