US Bridges

Ush 12E-STH B26S-S over Rock River

Fair

Jefferson County, Wisconsin · 0.1M E JCT Sth 106 · Structure no. B28000900000000

Built
1973
52 years old, rebuilt 2022
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
300 ft
3 main spans
Daily traffic
15,000
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Ush 12E-STH B26S-S over Rock River is a prestressed concrete continuous stringer/multi-beam or girder carrying Ush 12E-STH B26S-S over Rock River in Jefferson County, Wisconsin. It was built in 1973 and reconstructed in 2022, 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 15,000 vehicles a day, roughly 3% of them trucks, projected to reach 16,300 by 2042. The structure is 300 ft (91.4 m) long and 55 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesUsh 12E-STH B26S-S
CrossesRock River
Location0.1M E JCT Sth 106
RouteU.S. Route 12
CountyJefferson County
StateWisconsin
Coordinates42.92747, -88.84206
Functional classUrban Other Principal 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 protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating71.7 US tons
Inventory rating42.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length300 ft (91.4 m)
Longest span99 ft (30.2 m)
Deck width55 ft (16.8 m)
Roadway width46 ft (14 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,000 (2022)
Projected traffic16,300 by 2042
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.3 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Ush 12E-STH B26S-S over Rock River built?

It was built in 1973, making it 52 years old in 2025. It was reconstructed in 2022.

What condition is Ush 12E-STH B26S-S over Rock 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 September 2024.

How much traffic does Ush 12E-STH B26S-S over Rock River carry?

About 15,000 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Ush 12E-STH B26S-S over Rock River?

The structure is 300 ft (91.4 m) long with a longest span of 99 ft (30.2 m) and a deck 55 ft wide.

Who owns Ush 12E-STH B26S-S over Rock River?

It is owned by the City or Municipal Highway Agency.