US Bridges

Sth 77 over Little Frog Creek

Fair

Washburn County, Wisconsin · 2.1M E JCT Ush 53 · Structure no. B65001500000000

Built
1973
52 years old
Condition
Fair
inspected September 2023
Type
Culvert
Steel
Length
23 ft
2 main spans
Daily traffic
1,900
2021 count
Owner
State
State Highway Agency

About this bridge

Sth 77 over Little Frog Creek is a steel culvert carrying Sth 77 over Little Frog Creek in Washburn County, Wisconsin. It was built in 1973, so it is 52 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 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 1,900 vehicles a day, roughly 9% of them trucks, projected to reach 2,280 by 2041. The structure is 23 ft (7 m) long. If it were closed, the detour would be 17.4 mi (28 km).

CarriesSth 77
CrossesLittle Frog Creek
Location2.1M E JCT Ush 53
RouteState Highway 77
Coordinates46.09971, -91.78272
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.4 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckOther
Main spans2
Design loadH 20
Structure length23 ft (7 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,900 (2021)
Projected traffic2,280 by 2041
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed17.4 mi (28 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 77 over Little Frog Creek built?

It was built in 1973, making it 52 years old in 2025.

What condition is Sth 77 over Little Frog 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 2023.

How much traffic does Sth 77 over Little Frog Creek carry?

About 1,900 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is Sth 77 over Little Frog Creek?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m).

Who owns Sth 77 over Little Frog Creek?

It is owned by the State Highway Agency.