US Bridges

Cth I over Flambeau River

Fair

Rusk County, Wisconsin · 3.1M N JCT Ush 8-9 · Structure no. B54002700000000

Built
1984
41 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
340 ft
2 main spans
Daily traffic
657
2024 count
Owner
County
County Highway Agency

About this bridge

Cth I over Flambeau River is a steel continuous stringer/multi-beam or girder carrying Cth I over Flambeau River in Rusk County, Wisconsin. It was built in 1984, so it is 41 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 657 vehicles a day, projected to reach 716 by 2043. The structure is 340 ft (103.6 m) long and 32 ft wide. If it were closed, the detour would be 20.5 mi (33 km).

Location

Open in Google Maps
CarriesCth I
CrossesFlambeau River
Location3.1M N JCT Ush 8-9
RouteCounty Highway 0I
CountyRusk County
StateWisconsin
Coordinates45.52808, -90.98733
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure9 ExcellentNo problems noted.
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 inspectionJune 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.8 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length340 ft (103.6 m)
Longest span167 ft (50.9 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic657 (2024)
Projected traffic716 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed20.5 mi (33 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 I over Flambeau River built?

It was built in 1984, making it 41 years old in 2025.

What condition is Cth I over Flambeau 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 June 2024.

How much traffic does Cth I over Flambeau River carry?

About 657 vehicles per day (2024 count).

How long is Cth I over Flambeau River?

The structure is 340 ft (103.6 m) long with a longest span of 167 ft (50.9 m) and a deck 32 ft wide.

Who owns Cth I over Flambeau River?

It is owned by the County Highway Agency.