US Bridges

Sth 35 over Black River

Fair

Douglas County, Wisconsin · 0.1M N JCT Cth B to W · Structure no. B16008500000000

Built
1997
28 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
89 ft
1 main span
Daily traffic
3,300
2023 count
Owner
State
State Highway Agency

About this bridge

Sth 35 over Black River is a prestressed concrete stringer/multi-beam or girder carrying Sth 35 over Black River in Douglas County, Wisconsin. It was built in 1997, so it is 28 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 3,300 vehicles a day, roughly 7% of them trucks, projected to reach 3,000 by 2043. The structure is 89 ft (27.1 m) long and 38 ft wide. If it were closed, the detour would be 39.8 mi (64 km).

CarriesSth 35
CrossesBlack River
Location0.1M N JCT Cth B to W
RouteState Highway 35
Coordinates46.53563, -92.12102
Functional classRural Minor Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
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 rating84.5 US tons
Inventory rating44.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length89 ft (27.1 m)
Longest span85 ft (25.9 m)
Deck width38 ft (11.6 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,300 (2023)
Projected traffic3,000 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.8 mi (64 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Sth 35 over Black River built?

It was built in 1997, making it 28 years old in 2025.

What condition is Sth 35 over Black 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 July 2024.

How much traffic does Sth 35 over Black River carry?

About 3,300 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Sth 35 over Black River?

The structure is 89 ft (27.1 m) long with a longest span of 85 ft (25.9 m) and a deck 38 ft wide.

Who owns Sth 35 over Black River?

It is owned by the State Highway Agency.