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)

USH 12

Good

Over: E BR NIPPERSINK CREEK

0.3M E JCT CTH U, Walworth, WI

Built 1965 Load: 21.1 t ADT: 11,800

IH 43 SB

Good

Over: LRD CENTRALIA RD

0.9 MI S JCT USH 12, Walworth, WI

Built 1975 Load: 22.7 t ADT: 11,850

IH 43 NB

Good

Over: LRD CENTRALIA RD

0.7 MI N JCT STH 67, Walworth, WI

Built 1975 Load: 22.7 t ADT: 11,850

LRD FOSTER RD

Good

Over: SUGAR CREEK

0.9M S JCT CTH ES, Walworth, WI

Built 1970 Load: 24.3 t ADT: 470

LRD NORTH RD

Good

Over: LITTLE TURTLE CREEK

0.4M N JCT CTH X, Walworth, WI

Built 1963 Load: 24.3 t ADT: 117

USH 12

Good

Over: WHITE RIVER

0.5 MI E JCT STH 120, Walworth, WI

Built 1967 Load: 25.9 t ADT: 22,200

USH 12 EB

Good

Over: BR COMO CREEK

4.0 MI E JCT IH 43 MILE P, Walworth, WI

Built 1967 Load: 25.9 t ADT: 10,850

STH 67-LINCOLN ST

Good

Over: BR JACKSON CREEK

0.2M N JCT IH 43 TO N, Walworth, WI

Built 1976 Load: 25.9 t ADT: 8,300

IH 43

Good

Over: BR JACKSON CREEK

0.52 MI N JCT STH 67, Walworth, WI

Built 1976 Load: 25.9 t ADT: 23,700

IH 43 NB

Good

Over: CMSTPP RR

0.2 MI N JCT CTH X, Walworth, WI

Built 1975 Load: 27.5 t ADT: 10,850

LRD CLOVER RD

Good

Over: USH 12

2.6 MI N JCT CTH H, Walworth, WI

Built 1965 Load: 29.2 t ADT: 1,800

LRD BOWERS ROAD

Good

Over: SUGAR CREEK

0.9M S JCT CTH D, Walworth, WI

Built 1983 Load: 29.2 t ADT: 2,900

STH 120

Good

Over: BR SUGAR CREEK

2.8 MI N JCT STH 11, Walworth, WI

Built 1995 Load: 30.8 t ADT: 4,500

USH 12

Good

Over: JACKSON CREEK

2.6 MI E JCT IH 43, Walworth, WI

Built 1968 Load: 32.4 t ADT: 18,800

STH 36

Good

Over: ORE CREEK

0.7M N JCT STH 120, Walworth, WI

Built 1986 Load: 32.4 t ADT: 2,800

CTH B

Good

Over: N BR NIPPERSINK CREEK

2.8M W JCT CTH H TO E, Walworth, WI

Built 1989 Load: 32.4 t ADT: 1,500

USH 12

Good

Over: SPRING BROOK

0.12 MI E JCT STH 89, Walworth, WI

Built 2002 Load: 32.4 t ADT: 7,500

LRD SHERIDAN SPRIN

Good

Over: WHITE R

0.1 MI S OF BUCKBY ROAD, Walworth, WI

Built 2005 Load: 32.4 t ADT: 1,400

STH 36

Good

Over: BR WHITE R

3.8 MI E JCT STH 120, Walworth, WI

Built 2009 Load: 32.4 t ADT: 4,700

LRD NORTH STREET

Good

Over: MILL RACE OF WW CREEK

.5M W JEFFERSON ST, Walworth, WI

Built 2012 Load: 32.4 t ADT: 1,400

LRD HOSPITAL RD

Good

Over: BR ORE CREEK

0.8M W JCT STH 36, Walworth, WI

Built 2020 Load: 32.4 t ADT: 930

LRD DAM RD

Good

Over: TURTLE CREEK

2.2M N JCT STH 11, Walworth, WI

Built 2017 Load: 32.4 t ADT: 500

LRD NORTH STREET

Good

Over: MILL RACE OF WW CREEK

.6M W JEFFERSON ST, Walworth, WI

Built 2012 Load: 33.0 t ADT: 1,400

CTH ES

Good

Over: SUGAR CREEK

0.3M W JCT USH 12, Walworth, WI

Built 2001 Load: 34.0 t ADT: 2,600

LRD WISCONSIN ST (

Good

Over: IH 43

0.9 MI N JCT CTH X, Walworth, WI

Built 1976 Load: 34.0 t ADT: 375

STH 20

Good

Over: SPRING CREEK

2.4 MI E JCT STH 20/IH 43, Walworth, WI

Built 2002 Load: 34.0 t ADT: 2,700

LRD TOMBEAU RD

Good

Over: TOMBEAU LAKE

1.6M E JCT CTH U, Walworth, WI

Built 2004 Load: 34.0 t ADT: 316

CTH NN WB

Good

Over: USH 12

0.4 MI E JCT IH 43, Walworth, WI

Built 2016 Load: 34.0 t ADT: 2,950

CTH U

Good

Over: E BR NIPPERSINK CREEK

0.6M N JCT CTH B, Walworth, WI

Built 2021 Load: 34.0 t ADT: 2,270

CTH DD

Good

Over: SUGAR CREEK

2.5M N JCT STH 11, Walworth, WI

Built 2019 Load: 35.3 t ADT: 1,600

LRD BORG RD NB & S

Good

Over: SWAN CREEK

1.0M S JCT STH 50, Walworth, WI

Built 2016 Load: 35.3 t ADT: 2,130

LRD MILL ST

Good

Over: WHITE RIVER

0.5M S JCT STH 36, Walworth, WI

Built 2020 Load: 35.3 t ADT: 2,300

LRD POTTER RD

Good

Over: SUGAR CREEK

1.3M W JCT CTH DD, Walworth, WI

Built 1999 Load: 35.6 t ADT: 293

STH 11

Good

Over: TURTLE CREEK

1.7M E JCT STH 89, Walworth, WI

Built 1992 Load: 35.6 t ADT: 2,600

STH 120

Good

Over: ORE CREEK

2.0 MI N JCT USH 12, Walworth, WI

Built 1995 Load: 35.6 t ADT: 7,900

LRD WESTSIDE ROAD

Good

Over: BR. NIPPERSINK BROOK

2.0 MILES N. JCT CTH B, Walworth, WI

Built 2004 Load: 35.6 t ADT: 474

STH 11

Good

Over: SWAN CREEK

4.8M E JCT STH 89, Walworth, WI

Built 1988 Load: 35.6 t ADT: 7,300

CTH P

Good

Over: TURTLE CREEK

1.8M N JCT CTH M, Walworth, WI

Built 2023 Load: 35.6 t ADT: 1,300

LRD SPRING VALLEY

Good

Over: SAND CREEK

1.65M S JCT STH 36, Walworth, WI

Built 2012 Load: 36.3 t ADT: 979

USH 14

Good

Over: TURTLE CREEK

1.8 MI E JCT STH 89, Walworth, WI

Built 2019 Load: 36.3 t ADT: 7,400

CTH C

Good

Over: TURTLE CREEK

1.5M S JCT STH 11, Walworth, WI

Built 2023 Load: 36.6 t ADT: 1,000

STH 120

Good

Over: COMO CREEK

1.0 MI N JCT USH 12, Walworth, WI

Built 2018 Load: 36.9 t ADT: 7,900

LRD INDIAN MOUND R

Good

Over: USH 12

0.4 MILES EAST OF WALWORT, Walworth, WI

Built 2004 Load: 37.3 t ADT: 10

USH12

Good

Over: STH 59

0.25 MILES WEST OF STH 59, Walworth, WI

Built 2005 Load: 37.3 t ADT: 6,200

STH 67

Good

Over: PISCASAW CREEK

3.0 MI W JCT STH 14, Walworth, WI

Built 1994 Load: 37.3 t ADT: 1,500

LRD LAUDERDALE DRI

Good

Over: GREEN LAKE

0.5MI W JCT STH 67, Walworth, WI

Built 2022 Load: 37.3 t ADT: 140

LRD SPRING VALLEY

Good

Over: WHITE RIVER

0.7M E JCT STH 36, Walworth, WI

Built 1989 Load: 38.9 t ADT: 345

LRD CLOVER VALLEY

Good

Over: USH 12

1.0 MILE EAST OF STH 59/8, Walworth, WI

Built 2002 Load: 38.9 t ADT: 1,100

LRD SHERIDAN SPRIN

Good

Over: WHITE RIVER

2.2 M S OF JCT STH 36, Walworth, WI

Built 2015 Load: 39.2 t ADT: 1,400

LRD MOHAWK RD

Good

Over: NIPPERSINK CREEK

1.7M S JCT CTH B, Walworth, WI

Built 2011 Load: 39.5 t ADT: 92

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

Related

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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.