US Bridges

Cth L over Amnicon River

Good

Douglas County, Wisconsin · 2.8M S JCT Cth B · Structure no. B16006500000000

Built
1988
37 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
67 ft
1 main span
Daily traffic
301
2022 count
Owner
County
County Highway Agency

About this bridge

Cth L over Amnicon River is a prestressed concrete stringer/multi-beam or girder carrying Cth L over Amnicon River in Douglas County, Wisconsin. It was built in 1988, so it is 37 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 301 vehicles a day, projected to reach 331 by 2043. The structure is 67 ft (20.4 m) long and 30 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesCth L
CrossesAmnicon River
Location2.8M S JCT Cth B
RouteCounty Highway 0L
Coordinates46.46131, -91.96708
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.6 US tons
Inventory rating42.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length67 ft (20.4 m)
Longest span65 ft (19.8 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic301 (2022)
Projected traffic331 by 2043
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 L over Amnicon River built?

It was built in 1988, making it 37 years old in 2025.

What condition is Cth L over Amnicon River 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 September 2024.

How much traffic does Cth L over Amnicon River carry?

About 301 vehicles per day (2022 count).

How long is Cth L over Amnicon River?

The structure is 67 ft (20.4 m) long with a longest span of 65 ft (19.8 m) and a deck 30 ft wide.

Who owns Cth L over Amnicon River?

It is owned by the County Highway Agency.