US Bridges

Lrd Rockdale RD over Koshkonong Creek

Poor

Jefferson County, Wisconsin · 1.8M N JCT Sth 106 · Structure no. P28007800000000

Built
1930
95 years old
Condition
Poor
inspected August 2024
Type
Culvert
Steel
Length
36 ft
2 main spans
Daily traffic
88
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Lrd Rockdale RD over Koshkonong Creek is a steel culvert carrying Lrd Rockdale RD over Koshkonong Creek in Jefferson County, Wisconsin. It was built in 1930, so it is 95 years old, older than the Wisconsin average of 40.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 88 vehicles a day, projected to reach 96 by 2043. The structure is 36 ft (11 m) long. If it were closed, the detour would be 5.6 mi (9 km).

Location

Open in Google Maps
CarriesLrd Rockdale RD
CrossesKoshkonong Creek
Location1.8M N JCT Sth 106
RouteCity Street 0
CountyJefferson County
StateWisconsin
Coordinates42.91219, -89.00383
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.4 US tons
Inventory rating21.4 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckCorrugated steel
Main spans2
Design loadH 15
Structure length36 ft (11 m)
Longest span17 ft (5.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic88 (2022)
Projected traffic96 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5.6 mi (9 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$179,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Lrd Rockdale RD over Koshkonong Creek built?

It was built in 1930, making it 95 years old in 2025.

What condition is Lrd Rockdale RD over Koshkonong Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.

How much traffic does Lrd Rockdale RD over Koshkonong Creek carry?

About 88 vehicles per day (2022 count).

How long is Lrd Rockdale RD over Koshkonong Creek?

The structure is 36 ft (11 m) long with a longest span of 17 ft (5.2 m).

Who owns Lrd Rockdale RD over Koshkonong Creek?

It is owned by the Town or Township Highway Agency.