US Bridges

Cth O over Four Mile Creek

Fair

Marathon County, Wisconsin · 2.1M S JCT Cth N · Structure no. P37024600000000

Built
1950
75 years old, rebuilt 2021
Condition
Fair
inspected September 2023
Type
Slab
Wood or Timber
Length
30 ft
1 main span
Daily traffic
672
2023 count
Owner
County
County Highway Agency

About this bridge

Cth O over Four Mile Creek is a wood or timber slab carrying Cth O over Four Mile Creek in Marathon County, Wisconsin. It was built in 1950 and reconstructed in 2021, so it is 75 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 5 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 672 vehicles a day, projected to reach 732 by 2042. The structure is 30 ft (9 m) long and 29 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCth O
CrossesFour Mile Creek
Location2.1M S JCT Cth N
RouteCounty Highway 0O
CountyMarathon County
StateWisconsin
Coordinates44.87178, -89.76784
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
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 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.7 US tons
Inventory rating53.9 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length30 ft (9 m)
Longest span26 ft (7.9 m)
Deck width29 ft (8.8 m)
Roadway width27 ft (8.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic672 (2023)
Projected traffic732 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 O over Four Mile Creek built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 2021.

What condition is Cth O over Four Mile Creek 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 September 2023.

How much traffic does Cth O over Four Mile Creek carry?

About 672 vehicles per day (2023 count).

How long is Cth O over Four Mile Creek?

The structure is 30 ft (9 m) long with a longest span of 26 ft (7.9 m) and a deck 29 ft wide.

Who owns Cth O over Four Mile Creek?

It is owned by the County Highway Agency.