US Bridges

Cth X over Baraboo River

Poor

Sauk County, Wisconsin · 0.2M E JCT Sth 33 · Structure no. B56002000000000

Built
1956
69 years old
Condition
Poor
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
151 ft
3 main spans
Daily traffic
790
2024 count
Owner
County
County Highway Agency

About this bridge

Cth X over Baraboo River is a steel continuous stringer/multi-beam or girder carrying Cth X over Baraboo River in Sauk County, Wisconsin. It was built in 1956, so it is 69 years old, older 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 790 vehicles a day, projected to reach 948 by 2041. The structure is 151 ft (46 m) long and 27 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

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CarriesCth X
CrossesBaraboo River
Location0.2M E JCT Sth 33
RouteCounty Highway 0X
CountySauk County
StateWisconsin
Coordinates43.48151, -89.63637
Functional classRural Local

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.8 US tons
Inventory rating21.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length151 ft (46 m)
Longest span56 ft (17.1 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic790 (2024)
Projected traffic948 by 2041
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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$806,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Cth X over Baraboo River built?

It was built in 1956, making it 69 years old in 2025.

What condition is Cth X over Baraboo 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 September 2024.

How much traffic does Cth X over Baraboo River carry?

About 790 vehicles per day (2024 count).

How long is Cth X over Baraboo River?

The structure is 151 ft (46 m) long with a longest span of 56 ft (17.1 m) and a deck 27 ft wide.

Who owns Cth X over Baraboo River?

It is owned by the County Highway Agency.