US Bridges

Cth N over Yellowstone River

Fair

Lafayette County, Wisconsin · 4.2M N JCT Cth G · Structure no. P33007300000000

Built
1968
57 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
52 ft
1 main span
Daily traffic
264
2022 count
Owner
County
County Highway Agency

About this bridge

Cth N over Yellowstone River is a steel stringer/multi-beam or girder carrying Cth N over Yellowstone River in Lafayette County, Wisconsin. It was built in 1968, so it is 57 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 264 vehicles a day, projected to reach 290 by 2043. The structure is 52 ft (15.9 m) long and 27 ft wide. If it were closed, the detour would be 5.6 mi (9 km).

Location

Open in Google Maps
CarriesCth N
CrossesYellowstone River
Location4.2M N JCT Cth G
RouteCounty Highway 0N
CountyLafayette County
StateWisconsin
Coordinates42.75036, -89.91805
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating43.2 US tons
Inventory rating25 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length52 ft (15.9 m)
Longest span49 ft (14.9 m)
Deck width27 ft (8.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic264 (2022)
Projected traffic290 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5.6 mi (9 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Cth N over Yellowstone River built?

It was built in 1968, making it 57 years old in 2025.

What condition is Cth N over Yellowstone 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 August 2024.

How much traffic does Cth N over Yellowstone River carry?

About 264 vehicles per day (2022 count).

How long is Cth N over Yellowstone River?

The structure is 52 ft (15.9 m) long with a longest span of 49 ft (14.9 m) and a deck 27 ft wide.

Who owns Cth N over Yellowstone River?

It is owned by the County Highway Agency.