US Bridges

Cth U over Amnicon River

Fair

Douglas County, Wisconsin · 0.6M E JCT Cth Uu · Structure no. P16006400000000

Built
1973
52 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
76 ft
1 main span
Daily traffic
151
2022 count
Owner
County
County Highway Agency

About this bridge

Cth U over Amnicon River is a steel stringer/multi-beam or girder carrying Cth U over Amnicon River in Douglas County, Wisconsin. It was built in 1973, so it is 52 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 151 vehicles a day, projected to reach 166 by 2043. The structure is 76 ft (23.3 m) long and 32 ft wide. If it were closed, the detour would be 12.4 mi (20 km).

Location

Open in Google Maps
CarriesCth U
CrossesAmnicon River
Location0.6M E JCT Cth Uu
RouteCounty Highway 0U
CountyDouglas County
StateWisconsin
Coordinates46.63075, -91.90914
Functional classRural Local

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.5 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length76 ft (23.3 m)
Longest span73 ft (22.3 m)
Deck width32 ft (9.7 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic151 (2022)
Projected traffic166 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed12.4 mi (20 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 U over Amnicon River built?

It was built in 1973, making it 52 years old in 2025.

What condition is Cth U over Amnicon 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 September 2024.

How much traffic does Cth U over Amnicon River carry?

About 151 vehicles per day (2022 count).

How long is Cth U over Amnicon River?

The structure is 76 ft (23.3 m) long with a longest span of 73 ft (22.3 m) and a deck 32 ft wide.

Who owns Cth U over Amnicon River?

It is owned by the County Highway Agency.