US Bridges

Sth 23 over Ames Branch

Fair

Lafayette County, Wisconsin · 3.8M N JCT Sth 11 · Structure no. B33011300000000

Built
2008
17 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
132 ft
1 main span
Daily traffic
2,000
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 23 over Ames Branch is a prestressed concrete stringer/multi-beam or girder carrying Sth 23 over Ames Branch in Lafayette County, Wisconsin. It was built in 2008, so it is 17 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 2,000 vehicles a day, projected to reach 2,400 by 2043. The structure is 132 ft (40.2 m) long and 38 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesSth 23
CrossesAmes Branch
Location3.8M N JCT Sth 11
RouteState Highway 23
CountyLafayette County
StateWisconsin
Coordinates42.63667, -90.13222
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length132 ft (40.2 m)
Longest span128 ft (39 m)
Deck width38 ft (11.7 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2022)
Projected traffic2,400 by 2043
Trucks0%
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 23 over Ames Branch built?

It was built in 2008, making it 17 years old in 2025.

What condition is Sth 23 over Ames Branch 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 November 2024.

How much traffic does Sth 23 over Ames Branch carry?

About 2,000 vehicles per day (2022 count).

How long is Sth 23 over Ames Branch?

The structure is 132 ft (40.2 m) long with a longest span of 128 ft (39 m) and a deck 38 ft wide.

Who owns Sth 23 over Ames Branch?

It is owned by the State Highway Agency.