US Bridges

Cth M over Eighteen Mile Creek

Fair

Dunn County, Wisconsin · 0.05M S JCT Sth 40 · Structure no. P17090200000000

Built
1958
67 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
67 ft
1 main span
Daily traffic
690
2022 count
Owner
County
County Highway Agency

About this bridge

Cth M over Eighteen Mile Creek is a steel stringer/multi-beam or girder carrying Cth M over Eighteen Mile Creek in Dunn 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 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 690 vehicles a day, projected to reach 870 by 2043. The structure is 67 ft (20.5 m) long and 25 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesCth M
CrossesEighteen Mile Creek
Location0.05M S JCT Sth 40
RouteCounty Highway 0M
CountyDunn County
StateWisconsin
Coordinates45.0007, -91.71233
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.4 US tons
Inventory rating17.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length67 ft (20.5 m)
Longest span65 ft (19.9 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic690 (2022)
Projected traffic870 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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 Eighteen Mile Creek built?

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

What condition is Cth M over Eighteen 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 July 2024.

How much traffic does Cth M over Eighteen Mile Creek carry?

About 690 vehicles per day (2022 count).

How long is Cth M over Eighteen Mile Creek?

The structure is 67 ft (20.5 m) long with a longest span of 65 ft (19.9 m) and a deck 25 ft wide.

Who owns Cth M over Eighteen Mile Creek?

It is owned by the County Highway Agency.