US Bridges

Sth 35 over Black River

Poor

Douglas County, Wisconsin · 11.1M N JCT Cth M · Structure no. B16007400000000

Built
1992
33 years old
Condition
Poor
inspected July 2024
Type
Slab
Concrete
Length
46 ft
1 main span
Daily traffic
1,400
2023 count
Owner
State
State Highway Agency

About this bridge

Sth 35 over Black River is a concrete slab carrying Sth 35 over Black River in Douglas County, Wisconsin. It was built in 1992, so it is 33 years old, younger than the Wisconsin average of 40.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,400 vehicles a day, roughly 10% of them trucks, projected to reach 1,440 by 2043. The structure is 46 ft (14 m) long and 38 ft wide. If it were closed, the detour would be 39.8 mi (64 km).

CarriesSth 35
CrossesBlack River
Location11.1M N JCT Cth M
RouteState Highway 35
Coordinates46.44713, -92.16493
Functional classRural Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.6 US tons
Inventory rating29.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length46 ft (14 m)
Longest span44 ft (13.4 m)
Deck width38 ft (11.6 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,400 (2023)
Projected traffic1,440 by 2043
Trucks10%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$344,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sth 35 over Black River built?

It was built in 1992, making it 33 years old in 2025.

What condition is Sth 35 over Black River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2024.

How much traffic does Sth 35 over Black River carry?

About 1,400 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Sth 35 over Black River?

The structure is 46 ft (14 m) long with a longest span of 44 ft (13.4 m) and a deck 38 ft wide.

Who owns Sth 35 over Black River?

It is owned by the State Highway Agency.