US Bridges

Lrd N Jargo RD over Koshkonong Creek

Fair

Dane County, Wisconsin · 1.1M S JCT Cth Bb · Structure no. B13027700000000

Built
1976
49 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
79 ft
1 main span
Daily traffic
117
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Lrd N Jargo RD over Koshkonong Creek is a prestressed concrete stringer/multi-beam or girder carrying Lrd N Jargo RD over Koshkonong Creek in Dane County, Wisconsin. It was built in 1976, so it is 49 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 117 vehicles a day, projected to reach 128 by 2043. The structure is 79 ft (24 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesLrd N Jargo RD
CrossesKoshkonong Creek
Location1.1M S JCT Cth Bb
RouteCity Street 0
CountyDane County
StateWisconsin
Coordinates43.06306, -89.13175
Functional classRural Local

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 inspectionOctober 2024
Inspection intervalevery 24 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.6 US tons
Inventory rating32.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length79 ft (24 m)
Longest span76 ft (23.3 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic117 (2022)
Projected traffic128 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 Lrd N Jargo RD over Koshkonong Creek built?

It was built in 1976, making it 49 years old in 2025.

What condition is Lrd N Jargo RD over Koshkonong Creek 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 2024.

How much traffic does Lrd N Jargo RD over Koshkonong Creek carry?

About 117 vehicles per day (2022 count).

How long is Lrd N Jargo RD over Koshkonong Creek?

The structure is 79 ft (24 m) long with a longest span of 76 ft (23.3 m) and a deck 32 ft wide.

Who owns Lrd N Jargo RD over Koshkonong Creek?

It is owned by the Town or Township Highway Agency.