US Bridges

Cth F over Wapogasset Branch

Poor

Polk County, Wisconsin · 3.5M E JCT Sth 65 · Structure no. P48092100000000

Built
1920
105 years old, rebuilt 1930
Condition
Poor
inspected September 2024
Type
Slab
Concrete
Length
27 ft
1 main span
Daily traffic
720
2022 count
Owner
County
County Highway Agency

About this bridge

Cth F over Wapogasset Branch is a concrete slab carrying Cth F over Wapogasset Branch in Polk County, Wisconsin. It was built in 1920 and reconstructed in 1930, so it is 105 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 3 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 720 vehicles a day, roughly 5% of them trucks, projected to reach 760 by 2042. The structure is 27 ft (8.2 m) long and 25 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCth F
CrossesWapogasset Branch
Location3.5M E JCT Sth 65
RouteCounty Highway 0F
Coordinates45.32128, -92.43742
Functional classRural Major Collector

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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating50.4 US tons
Inventory rating30.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length27 ft (8.2 m)
Longest span22 ft (6.7 m)
Deck width25 ft (7.6 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic720 (2022)
Projected traffic760 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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$181,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Cth F over Wapogasset Branch built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1930.

What condition is Cth F over Wapogasset Branch 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 F over Wapogasset Branch carry?

About 720 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Cth F over Wapogasset Branch?

The structure is 27 ft (8.2 m) long with a longest span of 22 ft (6.7 m) and a deck 25 ft wide.

Who owns Cth F over Wapogasset Branch?

It is owned by the County Highway Agency.