US Bridges

Sth 49 over Little Wolf River

Fair

Marathon County, Wisconsin · 4.8M N JCT Sth 66 to W · Structure no. B37042900000000

Built
1947
78 years old, rebuilt 1978
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
40 ft
1 main span
Daily traffic
1,700
2021 count
Owner
State
State Highway Agency

About this bridge

Sth 49 over Little Wolf River is a steel stringer/multi-beam or girder carrying Sth 49 over Little Wolf River in Marathon County, Wisconsin. It was built in 1947 and reconstructed in 1978, so it is 78 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 1,700 vehicles a day, roughly 9% of them trucks, projected to reach 2,040 by 2041. The structure is 40 ft (12.2 m) long and 31 ft wide. If it were closed, the detour would be 46.6 mi (75 km).

Location

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CarriesSth 49
CrossesLittle Wolf River
Location4.8M N JCT Sth 66 to W
RouteState Highway 49
CountyMarathon County
StateWisconsin
Coordinates44.69372, -89.26435
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 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 rating57.7 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length40 ft (12.2 m)
Longest span40 ft (12.2 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,700 (2021)
Projected traffic2,040 by 2041
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed46.6 mi (75 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 49 over Little Wolf River built?

It was built in 1947, making it 78 years old in 2025. It was reconstructed in 1978.

What condition is Sth 49 over Little Wolf 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 June 2023.

How much traffic does Sth 49 over Little Wolf River carry?

About 1,700 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is Sth 49 over Little Wolf River?

The structure is 40 ft (12.2 m) long with a longest span of 40 ft (12.2 m) and a deck 31 ft wide.

Who owns Sth 49 over Little Wolf River?

It is owned by the State Highway Agency.