County profile · official public datasets

Walworth County, WI

206 public highway bridges tracked in the FHWA National Bridge Inventory: 34.5% rated Good, 61.7% Fair, 3.9% Poor.

206
Public bridges
34.5%
Good condition
3.9%
Poor condition

The verdict

According to the Federal Highway Administration's 2024 National Bridge Inventory.

Walworth County posts a better-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.

Top 26%
lowest Poor share in state
3.9%
Poor-condition share
206
public highway bridges
1981
avg year built

Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.

Walworth County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Walworth County ranks #19 of 72 Wisconsin counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 3.9%). Walworth County, Wisconsin contains 206 public highway bridges. Roughly 34.5% are rated “Good,” 61.7% “Fair,” and 3.9% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

Total bridges

206

Public highway bridges in Walworth County

Good condition

34.5%

71 of 206 rated 7-9

Fair condition

61.7%

127 of 206 rated 5-6

Poor condition

3.9%

8 of 206 rated 4 or below

In-state Poor-share rank

#19 of 72

Among Wisconsin counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 206 NBI-tracked bridges by lowest applicable component rating.

Good
34.5% (71)
Fair
61.7% (127)
Poor
3.9% (8)

Walworth County's Poor-condition bridges carry 13,008 vehicle crossings a day

That is 1.2% of the county's reported daily bridge traffic on 3.9% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 1,626 crossings a day against 4,345 for a Good-condition one. A Poor rating is a condition category, not a closure or a live safety judgement; it means the lowest applicable component rating is 4 or below.

Computed over the 206 of 206 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

41.7% of Walworth County's bridges have passed the 50-year mark

86 of the 206 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 34.5% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.

Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.

One structure carries 76.1% of the county's Poor-condition bridge traffic

USH 12/STH 67 over SUGAR CREEK, built 1966, carries 9,900 vehicles a day, the most of any Poor-rated structure here. The county's Poor-condition exposure is concentrated rather than evenly spread, so the 8-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 13,008 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Walworth County's bridges were built

206 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1970s, when 70 of the county's bridges still in the inventory were built, which is 34% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year (1981) matches the Wisconsin average (1984).

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

How Walworth County compares with Wisconsin's closest counties by inventory size

The 5 Wisconsin counties nearest Walworth County in number of bridges, with their condition splits. Its 3.9% Poor share is the 1st-lowest of these 6. Its average build year of 1981 against a peer-group mean of 1982 is in line with the group.

Showing the 5 closest of 71 Wisconsin counties eligible for comparison.

Bridge inventory size and condition shares for Walworth County and the 5 Wisconsin counties closest to it in inventory size
County Bridges Poor
Jackson County 218 7.8%
Lafayette County 217 8.3%
Dodge County 212 4.2%
Crawford County 211 5.2%
Iowa County 209 5.7%
Walworth County (this page) 206 3.9%

Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to Walworth County's. Source: FHWA National Bridge Inventory, 2024 release.

Nationwide counties with similar inventory size or average build year

Two NBI-derived peer sets for Walworth County, both outside Wisconsin so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside WI (206 bridges here).

Similar average build year

Nearest mean year-built outside WI (1981 here).

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 206 Good 71 Fair 127 Poor 8

Good-condition bridges (71)

LRD MOHAWK RD

Good

Over: NIPPERSINK CREEK

2.2M S JCT CTH B, Walworth, WI

Built 2010 Load: 39.5 t ADT: 92

CTH NN EB

Good

Over: USH 12

0.2 MI E JCT CTH HH, Walworth, WI

Built 2016 Load: 39.9 t ADT: 2,950

CTH B

Good

Over: LADD CREEK

0.8M W JCT CTH C, Walworth, WI

Built 2020 Load: 40.2 t ADT: 320

LRD NORTH ROAD

Good

Over: DARIEN CREEK

.2M N OFIH43, Walworth, WI

Built 2011 Load: 40.5 t ADT: 88

LRD SOUTH LAKE SHO

Good

Over: TRIB LAKE GENEVA

0.5M E JCT STH 67, Walworth, WI

Built 2016 Load: 40.5 t ADT: 5,200

CTH DD

Good

Over: HONEY CREEK

2.8M S JCT CTH D, Walworth, WI

Built 2017 Load: 40.8 t ADT: 1,600

LRD HODUNK RD

Good

Over: SUGAR CREEK

1.3 MI S JCT CTH D, Walworth, WI

Built 1971 Load: 42.1 t ADT: 58

CTH M RICHMOND R

Good

Over: TURTLE CREEK

0.4M N JCT STH 11, Walworth, WI

Built 2001 Load: 42.1 t ADT: 2,100

LRD SPRING VALLEY

Good

Over: STH 11/STH 36

2.5 MI W JCT STH 83, Walworth, WI

Built 2008 Load: 42.1 t ADT: 2,030

USH 12 WB

Good

Over: STH 50

8.8 MI W JCT CTH H, Walworth, WI

Built 2015 Load: 42.4 t ADT: 10,850

USH 12 EB

Good

Over: STH 50

1.3 MI S JCT STH 120, Walworth, WI

Built 2014 Load: 42.4 t ADT: 10,850

CTH X

Good

Over: LITTLE TURTLE CREEK

1.8M W JCT CTH C, Walworth, WI

Built 2012 Load: 42.8 t ADT: 1,400

CTH G

Good

Over: HONEY CREEK

0.4 MI N JCT STH 43, Walworth, WI

Built 2018 Load: 42.8 t ADT: 2,400

USH 12 EB

Good

Over: LRD PELL LAKE DR

4.9M E JCT STH 50 TO E, Walworth, WI

Built 1965 Load: 43.7 t ADT: 5,900

USH 12 WB

Good

Over: LRD PELL LAKE DR

3.9M W JCT CTH H, Walworth, WI

Built 1965 Load: 43.7 t ADT: 5,750

CTH H

Good

Over: JACKSON CREEK

2.1S JCT CTH NN, Walworth, WI

Built 2006 Load: 45.4 t ADT: 4,200

LRD WRIGLEY DR

Good

Over: WHITE RIVER

2.6M N JCT CTH BB, Walworth, WI

Built 2012 Load: 46.7 t ADT: 6,600

STH 20

Good

Over: HONEY CREEK

1.5 MI E JCT IH 43, Walworth, WI

Built 2010 Load: 47.3 t ADT: 5,300

CTH O

Good

Over: SWAN CREEK

1.3M S JCT STH 11, Walworth, WI

Built 2006 Load: 48.6 t ADT: 3,500

LRD EDWARDS BOULEV

Good

Over: WHITE RIVER

WALWORTH COUNTY CITY OF, Walworth, WI

Built 2010 Load: 54.4 t ADT: 6,300

STH 11 WB

Good

Over: WHITE RIVER

3.1 MI W JCT STH 83, Walworth, WI

Built 2010 Load: 56.7 t ADT: 3,750

Read our methodology - how this data is sourced, computed, and verified.

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.