US Bridges

Sth IRR (sth 27-ST over Couderay River

Fair

Sawyer County, Wisconsin · 4.9M N JCT Cth C · Structure no. B57004300000000

Built
1992
33 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
55 ft
1 main span
Daily traffic
1,300
2021 count
Owner
State
State Highway Agency

About this bridge

Sth IRR (sth 27-ST over Couderay River is a prestressed concrete stringer/multi-beam or girder carrying Sth IRR (sth 27-ST over Couderay River in Sawyer County, Wisconsin. It was built in 1992, so it is 33 years old, younger 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 6 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 1,300 vehicles a day, roughly 11% of them trucks, projected to reach 1,800 by 2042. The structure is 55 ft (16.7 m) long and 38 ft wide. If it were closed, the detour would be 28.6 mi (46 km).

Location

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CarriesSth IRR (sth 27-ST
CrossesCouderay River
Location4.9M N JCT Cth C
RouteState Highway 27
CountySawyer County
StateWisconsin
Coordinates45.84056, -91.40723
Functional classRural Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.8 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length55 ft (16.7 m)
Longest span53 ft (16.2 m)
Deck width38 ft (11.6 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,300 (2021)
Projected traffic1,800 by 2042
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed28.6 mi (46 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Sth IRR (sth 27-ST over Couderay River built?

It was built in 1992, making it 33 years old in 2025.

What condition is Sth IRR (sth 27-ST over Couderay River 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 Sth IRR (sth 27-ST over Couderay River carry?

About 1,300 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is Sth IRR (sth 27-ST over Couderay River?

The structure is 55 ft (16.7 m) long with a longest span of 53 ft (16.2 m) and a deck 38 ft wide.

Who owns Sth IRR (sth 27-ST over Couderay River?

It is owned by the State Highway Agency.