US Bridges

Sth 81 over Dougherty Creek

Good

Lafayette County, Wisconsin · 0.7M E JCT Sth 78 to N · Structure no. B33001700000000

Built
1981
44 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
89 ft
1 main span
Daily traffic
3,700
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 81 over Dougherty Creek is a prestressed concrete stringer/multi-beam or girder carrying Sth 81 over Dougherty Creek in Lafayette County, Wisconsin. It was built in 1981, so it is 44 years old, older than the Wisconsin average of 40.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,700 vehicles a day, roughly 4% of them trucks, projected to reach 3,650 by 2042. The structure is 89 ft (27.2 m) long and 42 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesSth 81
CrossesDougherty Creek
Location0.7M E JCT Sth 78 to N
RouteState Highway 81
Coordinates42.69807, -89.8552
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 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 rating82.8 US tons
Inventory rating41.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length89 ft (27.2 m)
Longest span87 ft (26.5 m)
Deck width42 ft (12.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,700 (2022)
Projected traffic3,650 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 81 over Dougherty Creek built?

It was built in 1981, making it 44 years old in 2025.

What condition is Sth 81 over Dougherty Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2023.

How much traffic does Sth 81 over Dougherty Creek carry?

About 3,700 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Sth 81 over Dougherty Creek?

The structure is 89 ft (27.2 m) long with a longest span of 87 ft (26.5 m) and a deck 42 ft wide.

Who owns Sth 81 over Dougherty Creek?

It is owned by the State Highway Agency.