US Bridges

Cth Cc over Black Brook Flowage

Poor

Polk County, Wisconsin · 1.6M N JCT Sth 46 · Structure no. B48002200000000

Built
1986
39 years old
Condition
Poor
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
92 ft
1 main span
Daily traffic
450
2024 count
Owner
County
County Highway Agency

About this bridge

Cth Cc over Black Brook Flowage is a prestressed concrete stringer/multi-beam or girder carrying Cth Cc over Black Brook Flowage in Polk County, Wisconsin. It was built in 1986, so it is 39 years old, younger 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.

It carries about 450 vehicles a day, projected to reach 775 by 2043. The structure is 92 ft (28 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCth Cc
CrossesBlack Brook Flowage
Location1.6M N JCT Sth 46
RouteCounty Highway 0CC
CountyPolk County
StateWisconsin
Coordinates45.266, -92.38861
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating75.6 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length92 ft (28 m)
Longest span90 ft (27.4 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic450 (2024)
Projected traffic775 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$461,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Cth Cc over Black Brook Flowage built?

It was built in 1986, making it 39 years old in 2025.

What condition is Cth Cc over Black Brook Flowage 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 April 2024.

How much traffic does Cth Cc over Black Brook Flowage carry?

About 450 vehicles per day (2024 count).

How long is Cth Cc over Black Brook Flowage?

The structure is 92 ft (28 m) long with a longest span of 90 ft (27.4 m) and a deck 30 ft wide.

Who owns Cth Cc over Black Brook Flowage?

It is owned by the County Highway Agency.