US Bridges

Cth S over Duncan Creek

Poor

Chippewa County, Wisconsin · 0.5 M E Cth Q · Structure no. B09009600000000

Built
1978
47 years old
Condition
Poor
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
212 ft
3 main spans
Daily traffic
5,515
2023 count
Owner
County
County Highway Agency

About this bridge

Cth S over Duncan Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying Cth S over Duncan Creek in Chippewa County, Wisconsin. It was built in 1978, so it is 47 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.

It carries about 5,515 vehicles a day, projected to reach 5,830 by 2042. The structure is 212 ft (64.5 m) long and 36 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesCth S
CrossesDuncan Creek
Location0.5 M E Cth Q
RouteCounty Highway 0S
CountyChippewa County
StateWisconsin
Coordinates45.09556, -91.49003
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.
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 inspectionNovember 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 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 rating75.6 US tons
Inventory rating41.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length212 ft (64.5 m)
Longest span70 ft (21.3 m)
Deck width36 ft (11 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,515 (2023)
Projected traffic5,830 by 2042
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$1.3 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Cth S over Duncan Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is Cth S over Duncan Creek 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 November 2023.

How much traffic does Cth S over Duncan Creek carry?

About 5,515 vehicles per day (2023 count).

How long is Cth S over Duncan Creek?

The structure is 212 ft (64.5 m) long with a longest span of 70 ft (21.3 m) and a deck 36 ft wide.

Who owns Cth S over Duncan Creek?

It is owned by the County Highway Agency.