US Bridges

Ush 12/18 over Drainage Ditch

Fair

Dane County, Wisconsin · 0.2M E JCT Ush 51 to S · Structure no. B13031900000000

Built
1987
38 years old
Condition
Fair
inspected October 2023
Type
Culvert
Concrete Continuous
Length
26 ft
2 main spans
Daily traffic
86,700
2022 count
Owner
State
State Highway Agency

About this bridge

Ush 12/18 over Drainage Ditch is a concrete continuous culvert carrying Ush 12/18 over Drainage Ditch in Dane County, Wisconsin. It was built in 1987, so it is 38 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 86,700 vehicles a day, roughly 1% of them trucks, projected to reach 104,040 by 2042. The structure is 26 ft (7.8 m) long. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesUsh 12/18
CrossesDrainage Ditch
Location0.2M E JCT Ush 51 to S
RouteU.S. Route 12
CountyDane County
StateWisconsin
Coordinates43.04689, -89.30197
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 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 rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length26 ft (7.8 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 traffic86,700 (2022)
Projected traffic104,040 by 2042
Trucks1%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemYes

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 Ush 12/18 over Drainage Ditch built?

It was built in 1987, making it 38 years old in 2025.

What condition is Ush 12/18 over Drainage Ditch 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 Ush 12/18 over Drainage Ditch carry?

About 86,700 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Ush 12/18 over Drainage Ditch?

The structure is 26 ft (7.8 m) long with a longest span of 10 ft (3 m).

Who owns Ush 12/18 over Drainage Ditch?

It is owned by the State Highway Agency.