US Bridges

Cth M over Unnamed Waterway

Good

Juneau County, Wisconsin · 4.2 M S JCT Sth 21 · Structure no. B29014900000000

Built
2015
10 years old
Condition
Good
inspected June 2024
Type
Slab
Wood or Timber
Length
22 ft
1 main span
Daily traffic
150
2022 count
Owner
County
County Highway Agency

About this bridge

Cth M over Unnamed Waterway is a wood or timber slab carrying Cth M over Unnamed Waterway in Juneau County, Wisconsin. It was built in 2015, so it is 10 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 150 vehicles a day, projected to reach 165 by 2043. The structure is 22 ft (6.8 m) long and 30 ft wide. If it were closed, the detour would be 5.6 mi (9 km).

CarriesCth M
CrossesUnnamed Waterway
Location4.2 M S JCT Sth 21
RouteCounty Highway 0M
Coordinates43.97, -90.21167
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.2 US tons
Inventory rating42.9 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckNot applicable
Main spans1
Design loadHS 20
Structure length22 ft (6.8 m)
Longest span22 ft (6.8 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2022)
Projected traffic165 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 M over Unnamed Waterway built?

It was built in 2015, making it 10 years old in 2025.

What condition is Cth M over Unnamed Waterway 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 2024.

How much traffic does Cth M over Unnamed Waterway carry?

About 150 vehicles per day (2022 count).

How long is Cth M over Unnamed Waterway?

The structure is 22 ft (6.8 m) long with a longest span of 22 ft (6.8 m) and a deck 30 ft wide.

Who owns Cth M over Unnamed Waterway?

It is owned by the County Highway Agency.