US Bridges

Sth 23-STH 81-MAIN over Pecatonica River

Fair

Lafayette County, Wisconsin · 0.8M E JCT Sth 81 to W · Structure no. B33000700000000

Built
1968
57 years old, rebuilt 2021
Condition
Fair
inspected October 2023
Type
Slab
Concrete Continuous
Length
148 ft
3 main spans
Daily traffic
10,400
2021 count
Owner
State
State Highway Agency

About this bridge

Sth 23-STH 81-MAIN over Pecatonica River is a concrete continuous slab carrying Sth 23-STH 81-MAIN over Pecatonica River in Lafayette County, Wisconsin. It was built in 1968 and reconstructed in 2021, so it is 57 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 10,400 vehicles a day, roughly 11% of them trucks, projected to reach 11,400 by 2041. The structure is 148 ft (45 m) long and 60 ft wide. If it were closed, the detour would be 42.9 mi (69 km).

Location

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CarriesSth 23-STH 81-MAIN
CrossesPecatonica River
Location0.8M E JCT Sth 81 to W
RouteState Highway 23
CountyLafayette County
StateWisconsin
Coordinates42.67707, -90.118
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.9 US tons
Inventory rating41.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length148 ft (45 m)
Longest span59 ft (18 m)
Deck width60 ft (18.3 m)
Roadway width45 ft (13.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,400 (2021)
Projected traffic11,400 by 2041
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed42.9 mi (69 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 23-STH 81-MAIN over Pecatonica River built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 2021.

What condition is Sth 23-STH 81-MAIN over Pecatonica 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 October 2023.

How much traffic does Sth 23-STH 81-MAIN over Pecatonica River carry?

About 10,400 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is Sth 23-STH 81-MAIN over Pecatonica River?

The structure is 148 ft (45 m) long with a longest span of 59 ft (18 m) and a deck 60 ft wide.

Who owns Sth 23-STH 81-MAIN over Pecatonica River?

It is owned by the State Highway Agency.