US Bridges

Cth M over Black Creek

Fair

Eau Claire County, Wisconsin · 1.4MI W of Cth H · Structure no. P18011000000000

Built
1963
62 years old, rebuilt 2000
Condition
Fair
inspected September 2024
Type
Channel Beam
Prestressed Concrete
Length
46 ft
1 main span
Daily traffic
265
2024 count
Owner
County
County Highway Agency

About this bridge

Cth M over Black Creek is a prestressed concrete channel beam carrying Cth M over Black Creek in Eau Claire County, Wisconsin. It was built in 1963 and reconstructed in 2000, so it is 62 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 265 vehicles a day, projected to reach 281 by 2043. The structure is 46 ft (14.1 m) long and 32 ft wide. If it were closed, the detour would be 5.6 mi (9 km).

Location

Open in Google Maps
CarriesCth M
CrossesBlack Creek
Location1.4MI W of Cth H
RouteCounty Highway 0M
CountyEau Claire County
StateWisconsin
Coordinates44.66861, -90.99083
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
Deck9 ExcellentNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionSeptember 2024
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 rating41.4 US tons
Inventory rating23.3 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length46 ft (14.1 m)
Longest span45 ft (13.8 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic265 (2024)
Projected traffic281 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5.6 mi (9 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 Black Creek built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 2000.

What condition is Cth M over Black 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 2024.

How much traffic does Cth M over Black Creek carry?

About 265 vehicles per day (2024 count).

How long is Cth M over Black Creek?

The structure is 46 ft (14.1 m) long with a longest span of 45 ft (13.8 m) and a deck 32 ft wide.

Who owns Cth M over Black Creek?

It is owned by the County Highway Agency.