US Bridges

Cth Bb (golden Lak over Oconomowoc River

Good

Waukesha County, Wisconsin · 0.8M N JCT Cth B · Structure no. B67000600000000

Built
2000
25 years old
Condition
Good
inspected September 2024
Type
Slab
Concrete
Length
45 ft
1 main span
Daily traffic
2,700
2022 count
Owner
County
County Highway Agency

About this bridge

Cth Bb (golden Lak over Oconomowoc River is a concrete slab carrying Cth Bb (golden Lak over Oconomowoc River in Waukesha County, Wisconsin. It was built in 2000, so it is 25 years old, younger 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 2,700 vehicles a day, projected to reach 3,240 by 2042. The structure is 45 ft (13.8 m) long and 46 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCth Bb (golden Lak
CrossesOconomowoc River
Location0.8M N JCT Cth B
RouteCounty Highway 0BB
CountyWaukesha County
StateWisconsin
Coordinates43.09518, -88.52074
Functional classUrban Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.5 US tons
Inventory rating41.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length45 ft (13.8 m)
Longest span43 ft (13 m)
Deck width46 ft (14.1 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,700 (2022)
Projected traffic3,240 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 Bb (golden Lak over Oconomowoc River built?

It was built in 2000, making it 25 years old in 2025.

What condition is Cth Bb (golden Lak over Oconomowoc 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 Bb (golden Lak over Oconomowoc River carry?

About 2,700 vehicles per day (2022 count).

How long is Cth Bb (golden Lak over Oconomowoc River?

The structure is 45 ft (13.8 m) long with a longest span of 43 ft (13 m) and a deck 46 ft wide.

Who owns Cth Bb (golden Lak over Oconomowoc River?

It is owned by the County Highway Agency.