US Bridges

Cth Bb over N Br E Twin River

Poor

Kewaunee County, Wisconsin · 0.8M W JCT Cth B · Structure no. B31010700000000

Built
1978
47 years old
Condition
Poor
inspected June 2024
Type
Slab
Concrete Continuous
Length
62 ft
2 main spans
Daily traffic
1,200
2021 count
Owner
County
County Highway Agency

About this bridge

Cth Bb over N Br E Twin River is a concrete continuous slab carrying Cth Bb over N Br E Twin River in Kewaunee County, Wisconsin. It was built in 1978, so it is 47 years old, older than the Wisconsin average of 40.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,200 vehicles a day, projected to reach 542 by 2043. The structure is 62 ft (18.8 m) long and 36 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesCth Bb
CrossesN Br E Twin River
Location0.8M W JCT Cth B
RouteCounty Highway 0BB
CountyKewaunee County
StateWisconsin
Coordinates44.32742, -87.63672
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be 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 rating68.5 US tons
Inventory rating41.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length62 ft (18.8 m)
Longest span30 ft (9.1 m)
Deck width36 ft (11 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,200 (2021)
Projected traffic542 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$372,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Cth Bb over N Br E Twin River built?

It was built in 1978, making it 47 years old in 2025.

What condition is Cth Bb over N Br E Twin River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.

How much traffic does Cth Bb over N Br E Twin River carry?

About 1,200 vehicles per day (2021 count).

How long is Cth Bb over N Br E Twin River?

The structure is 62 ft (18.8 m) long with a longest span of 30 ft (9.1 m) and a deck 36 ft wide.

Who owns Cth Bb over N Br E Twin River?

It is owned by the County Highway Agency.