US Bridges

Cth Db over Lake Du Bay

Fair

Marathon County, Wisconsin · 0.5M S JCT Cth C · Structure no. B37074100000000

Built
1942
83 years old, rebuilt 2005
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
112 ft
2 main spans
Daily traffic
1,803
2023 count
Owner
County
County Highway Agency

About this bridge

Cth Db over Lake Du Bay is a prestressed concrete stringer/multi-beam or girder carrying Cth Db over Lake Du Bay in Marathon County, Wisconsin. It was built in 1942 and reconstructed in 2005, so it is 83 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 1,803 vehicles a day, projected to reach 1,353 by 2042. The structure is 112 ft (34.2 m) long and 34 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesCth Db
CrossesLake Du Bay
Location0.5M S JCT Cth C
RouteCounty Highway 0DB
CountyMarathon County
StateWisconsin
Coordinates44.70646, -89.67435
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
Deck7 GoodSome minor problems.
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 inspectionJuly 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 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 rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length112 ft (34.2 m)
Longest span54 ft (16.6 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,803 (2023)
Projected traffic1,353 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Db over Lake Du Bay built?

It was built in 1942, making it 83 years old in 2025. It was reconstructed in 2005.

What condition is Cth Db over Lake Du Bay 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 July 2023.

How much traffic does Cth Db over Lake Du Bay carry?

About 1,803 vehicles per day (2023 count).

How long is Cth Db over Lake Du Bay?

The structure is 112 ft (34.2 m) long with a longest span of 54 ft (16.6 m) and a deck 34 ft wide.

Who owns Cth Db over Lake Du Bay?

It is owned by the County Highway Agency.