US Bridges

Cth B over Montello River

Fair

Marquette County, Wisconsin · 0.6M N JCT Cth E · Structure no. P39090700000000

Built
1981
44 years old
Condition
Fair
inspected August 2024
Type
Culvert
Steel
Length
24 ft
2 main spans
Daily traffic
200
2024 count
Owner
County
County Highway Agency

About this bridge

Cth B over Montello River is a steel culvert carrying Cth B over Montello River in Marquette County, Wisconsin. It was built in 1981, so it is 44 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 6 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 200 vehicles a day, projected to reach 216 by 2041. The structure is 24 ft (7.2 m) long. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesCth B
CrossesMontello River
Location0.6M N JCT Cth E
RouteCounty Highway 0B
CountyMarquette County
StateWisconsin
Coordinates43.90977, -89.42742
Functional classRural Major 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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.4 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckSteel plate
Main spans2
Design loadH 15
Structure length24 ft (7.2 m)
Longest span10 ft (3.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2024)
Projected traffic216 by 2041
Trucks0%
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

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 B over Montello River built?

It was built in 1981, making it 44 years old in 2025.

What condition is Cth B over Montello 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 B over Montello River carry?

About 200 vehicles per day (2024 count).

How long is Cth B over Montello River?

The structure is 24 ft (7.2 m) long with a longest span of 10 ft (3.2 m).

Who owns Cth B over Montello River?

It is owned by the County Highway Agency.