US Bridges

Sth 58 over Little Baraboo River

Good

Sauk County, Wisconsin · 3.5M N JCT Cth G to E · Structure no. B56009500000000

Built
1990
35 years old
Condition
Good
inspected June 2023
Type
Slab
Concrete Continuous
Length
84 ft
2 main spans
Daily traffic
1,400
2021 count
Owner
State
State Highway Agency

About this bridge

Sth 58 over Little Baraboo River is a concrete continuous slab carrying Sth 58 over Little Baraboo River in Sauk County, Wisconsin. It was built in 1990, so it is 35 years old, younger than the Wisconsin average of 40.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,400 vehicles a day, roughly 9% of them trucks, projected to reach 1,680 by 2041. The structure is 84 ft (25.5 m) long and 39 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesSth 58
CrossesLittle Baraboo River
Location3.5M N JCT Cth G to E
RouteState Highway 58
Coordinates43.57195, -90.13272
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.5 US tons
Inventory rating39.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length84 ft (25.5 m)
Longest span41 ft (12.5 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,400 (2021)
Projected traffic1,680 by 2041
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 58 over Little Baraboo River built?

It was built in 1990, making it 35 years old in 2025.

What condition is Sth 58 over Little Baraboo River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.

How much traffic does Sth 58 over Little Baraboo River carry?

About 1,400 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is Sth 58 over Little Baraboo River?

The structure is 84 ft (25.5 m) long with a longest span of 41 ft (12.5 m) and a deck 39 ft wide.

Who owns Sth 58 over Little Baraboo River?

It is owned by the State Highway Agency.