US Bridges

Sth 71-S Railroad over Baraboo River

Fair

Monroe County, Wisconsin · 0.3M E JCT Cth P to S · Structure no. B41011300000000

Built
1975
50 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete
Length
74 ft
2 main spans
Daily traffic
2,900
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 71-S Railroad over Baraboo River is a concrete slab carrying Sth 71-S Railroad over Baraboo River in Monroe County, Wisconsin. It was built in 1975, so it is 50 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 2,900 vehicles a day, roughly 8% of them trucks, projected to reach 3,180 by 2043. The structure is 74 ft (22.7 m) long and 52 ft wide. If it were closed, the detour would be 23.6 mi (38 km).

Location

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CarriesSth 71-S Railroad
CrossesBaraboo River
Location0.3M E JCT Cth P to S
RouteState Highway 71
CountyMonroe County
StateWisconsin
Coordinates43.79118, -90.36586
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 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 geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.8 US tons
Inventory rating41.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length74 ft (22.7 m)
Longest span37 ft (11.3 m)
Deck width52 ft (15.8 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,900 (2022)
Projected traffic3,180 by 2043
Trucks8%
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

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 71-S Railroad over Baraboo River built?

It was built in 1975, making it 50 years old in 2025.

What condition is Sth 71-S Railroad over Baraboo 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 September 2024.

How much traffic does Sth 71-S Railroad over Baraboo River carry?

About 2,900 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is Sth 71-S Railroad over Baraboo River?

The structure is 74 ft (22.7 m) long with a longest span of 37 ft (11.3 m) and a deck 52 ft wide.

Who owns Sth 71-S Railroad over Baraboo River?

It is owned by the State Highway Agency.