US Bridges

Cth Cm over Fox River

PoorPosted for load

Columbia County, Wisconsin · 0.1M E JCT Cth T · Structure no. P11004900000000

Built
1958
67 years old
Condition
Poor
inspected September 2024
Type
Slab
Wood or Timber
Length
80 ft
4 main spans
Daily traffic
500
2022 count
Owner
County
County Highway Agency

About this bridge

Cth Cm over Fox River is a wood or timber slab carrying Cth Cm over Fox River in Columbia County, Wisconsin. It was built in 1958, so it is 67 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 4 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. Its operating status is: posted for load restriction.

It carries about 500 vehicles a day, projected to reach 550 by 2043. The structure is 80 ft (24.4 m) long and 28 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesCth Cm
CrossesFox River
Location0.1M E JCT Cth T
RouteCounty Highway 0CM
Coordinates43.63622, -89.42491
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating62.8 US tons
Inventory rating42.9 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans4
Design loadHS 20
Structure length80 ft (24.4 m)
Longest span20 ft (6.1 m)
Deck width28 ft (8.5 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2022)
Projected traffic550 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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$410,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Cth Cm over Fox River built?

It was built in 1958, making it 67 years old in 2025.

What condition is Cth Cm over Fox River 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 Cm over Fox River carry?

About 500 vehicles per day (2022 count).

How long is Cth Cm over Fox River?

The structure is 80 ft (24.4 m) long with a longest span of 20 ft (6.1 m) and a deck 28 ft wide.

Who owns Cth Cm over Fox River?

It is owned by the County Highway Agency.