US Bridges

Sth 13 over Bois Brule River

Fair

Douglas County, Wisconsin · 1.2M N JCT Cth H · Structure no. B16002300000000

Built
1970
55 years old
Condition
Fair
inspected July 2024
Type
Frame
Concrete
Length
49 ft
1 main span
Daily traffic
670
2023 count
Owner
State
State Highway Agency

About this bridge

Sth 13 over Bois Brule River is a concrete frame carrying Sth 13 over Bois Brule River in Douglas County, Wisconsin. It was built in 1970, so it is 55 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 670 vehicles a day, roughly 18% of them trucks, projected to reach 720 by 2043. The structure is 49 ft (15 m) long and 38 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

Location

Open in Google Maps
CarriesSth 13
CrossesBois Brule River
Location1.2M N JCT Cth H
RouteState Highway 13
CountyDouglas County
StateWisconsin
Coordinates46.68013, -91.59536
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionJuly 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 alignment6: Equal to present minimum criteria
Operating rating61.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length49 ft (15 m)
Longest span47 ft (14.4 m)
Deck width38 ft (11.6 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic670 (2023)
Projected traffic720 by 2043
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 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 13 over Bois Brule River built?

It was built in 1970, making it 55 years old in 2025.

What condition is Sth 13 over Bois Brule 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 13 over Bois Brule River carry?

About 670 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is Sth 13 over Bois Brule River?

The structure is 49 ft (15 m) long with a longest span of 47 ft (14.4 m) and a deck 38 ft wide.

Who owns Sth 13 over Bois Brule River?

It is owned by the State Highway Agency.