US Bridges

Cth W over Thornapple River

Fair

Sawyer County, Wisconsin · 2.3M W JCT Cth M to N · Structure no. B57006500000000

Built
2003
22 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete Continuous
Length
63 ft
2 main spans
Daily traffic
678
2024 count
Owner
County
County Highway Agency

About this bridge

Cth W over Thornapple River is a concrete continuous slab carrying Cth W over Thornapple River in Sawyer County, Wisconsin. It was built in 2003, so it is 22 years old, younger 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 678 vehicles a day, roughly 5% of them trucks, projected to reach 726 by 2043. The structure is 63 ft (19.1 m) long and 32 ft wide. If it were closed, the detour would be 23.6 mi (38 km).

Location

Open in Google Maps
CarriesCth W
CrossesThornapple River
Location2.3M W JCT Cth M to N
RouteCounty Highway 0W
CountySawyer County
StateWisconsin
Coordinates45.78376, -90.88951
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be 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 Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length63 ft (19.1 m)
Longest span30 ft (9.1 m)
Deck width32 ft (9.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic678 (2024)
Projected traffic726 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed23.6 mi (38 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 W over Thornapple River built?

It was built in 2003, making it 22 years old in 2025.

What condition is Cth W over Thornapple 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 August 2024.

How much traffic does Cth W over Thornapple River carry?

About 678 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Cth W over Thornapple River?

The structure is 63 ft (19.1 m) long with a longest span of 30 ft (9.1 m) and a deck 32 ft wide.

Who owns Cth W over Thornapple River?

It is owned by the County Highway Agency.