US Bridges

Cth B over Yahara River

Good

Dane County, Wisconsin · 0.2M W JCT Cth N · Structure no. B13003400000000

Built
1952
73 years old, rebuilt 2012
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
158 ft
2 main spans
Daily traffic
5,400
2021 count
Owner
County
County Highway Agency

About this bridge

Cth B over Yahara River is a prestressed concrete continuous stringer/multi-beam or girder carrying Cth B over Yahara River in Dane County, Wisconsin. It was built in 1952 and reconstructed in 2012, so it is 73 years old, older than the Wisconsin average of 40.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 5,400 vehicles a day, projected to reach 6,480 by 2041. The structure is 158 ft (48.2 m) long and 36 ft wide. If it were closed, the detour would be 7.5 mi (12 km).

CarriesCth B
CrossesYahara River
Location0.2M W JCT Cth N
RouteCounty Highway 0B
Coordinates42.94044, -89.20406
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.2 US tons
Inventory rating40.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length158 ft (48.2 m)
Longest span75 ft (22.9 m)
Deck width36 ft (11.1 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,400 (2021)
Projected traffic6,480 by 2041
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed7.5 mi (12 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 B over Yahara River built?

It was built in 1952, making it 73 years old in 2025. It was reconstructed in 2012.

What condition is Cth B over Yahara River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

How much traffic does Cth B over Yahara River carry?

About 5,400 vehicles per day (2021 count).

How long is Cth B over Yahara River?

The structure is 158 ft (48.2 m) long with a longest span of 75 ft (22.9 m) and a deck 36 ft wide.

Who owns Cth B over Yahara River?

It is owned by the County Highway Agency.