County profile · official public datasets

Juneau County, WI

172 public highway bridges tracked in the FHWA National Bridge Inventory: 49.4% rated Good, 47.7% Fair, 2.9% Poor.

172
Public bridges
49.4%
Good condition
2.9%
Poor condition

The verdict

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

Juneau County posts a top-10% lowest Poor-condition share among rated counties in the state across mid-size county bridge inventory.

Top 8%
lowest Poor share in state
2.9%
Poor-condition share
172
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.

Juneau County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Juneau County ranks #6 of 72 Wisconsin counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 2.9%). Juneau County, Wisconsin contains 172 public highway bridges. Roughly 49.4% are rated “Good,” 47.7% “Fair,” and 2.9% “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

172

Public highway bridges in Juneau County

Good condition

49.4%

85 of 172 rated 7-9

Fair condition

47.7%

82 of 172 rated 5-6

Poor condition

2.9%

5 of 172 rated 4 or below

In-state Poor-share rank

#6 of 72

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

Condition distribution

Share of 172 NBI-tracked bridges by lowest applicable component rating.

Good
49.4% (85)
Fair
47.7% (82)
Poor
2.9% (5)

Juneau County's Poor-condition bridges carry 2,343 vehicle crossings a day

That is 0.4% of the county's reported daily bridge traffic on 2.9% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 469 crossings a day against 2,956 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 172 of 172 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

41.9% of Juneau County's bridges have passed the 50-year mark

72 of the 172 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 49.4% 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 44.2% of the county's Poor-condition bridge traffic

CTH O over TRIBUTARY BARABOO RIVER, built 1925, carries 1,035 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 5-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 2,343 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Juneau County's bridges were built

172 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1960s, when 45 of the county's bridges still in the inventory were built, which is 26.2% of those with a recorded year. That cohort is now 55 to 64 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 Juneau County compares with Wisconsin's closest counties by inventory size

The 5 Wisconsin counties nearest Juneau County in number of bridges, with their condition splits. Its 2.9% Poor share is the 2nd-lowest of these 6. Its average build year of 1981 against a peer-group mean of 1987 is 6 years older.

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

Bridge inventory size and condition shares for Juneau County and the 5 Wisconsin counties closest to it in inventory size
County Bridges Poor
Jefferson County 182 5.5%
Portage County 182 2.7%
Taylor County 176 11.4%
Juneau County (this page) 172 2.9%
Waupaca County 169 3%
Washington County 162 8.6%

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 Juneau 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 Juneau County, both outside Wisconsin so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside WI (172 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 172 Good 85 Fair 82 Poor 5

All bridges (172)

STH 82

Fair

Over: TRIB CLEAVER CREEK

1.8M E JCT STH 80 TO N, Juneau, WI

Built 1986 Load: 32.4 t ADT: 2,300

CTH N

Fair

Over: LEMONWEIR RIVER SLOUGH

0.1M E JCT USH 12, Juneau, WI

Built 1988 Load: 32.4 t ADT: 343

CTH A

Fair

Over: LITTLE LEMONWEIR RIVER

0.9M W JCT CTH H, Juneau, WI

Built 1987 Load: 34.0 t ADT: 618

STH 80-E BRIDGE ST

Fair

Over: LEMONWEIR RIVER

0.2M N JCT USH 12 TO W, Juneau, WI

Built 1995 Load: 34.0 t ADT: 3,300

USH 12-STH 16

Fair

Over: LITTLE LEMONWEIR RIVER

2.5M E JCT CTH C, Juneau, WI

Built 1931 Load: 34.0 t ADT: 2,500

USH 12-STH 16

Fair

Over: UNION PACIFIC RR

0.1M E JCT CTH H, Juneau, WI

Built 1983 Load: 35.6 t ADT: 2,200

LRD 6TH AVE SOUTH

Fair

Over: LEMONWEIR RIVER

0.3M S JCT CTH M, Juneau, WI

Built 1986 Load: 35.6 t ADT: 130

LRD HAHN ST

Fair

Over: BARABOO RIVER

0.6M S JCT STH 33, Juneau, WI

Built 1988 Load: 35.6 t ADT: 179

CTH N

Fair

Over: ONE MILE CREEK

0.3M E JCT USH 12, Juneau, WI

Built 1988 Load: 35.6 t ADT: 310

CTH H

Fair

Over: TREAT SLOUGH

4.2M N JCT STH 21, Juneau, WI

Built 1998 Load: 35.6 t ADT: 119

LRD 6TH AVE SOUTH

Fair

Over: BR LEMONWEIR RIVER

1.1M S JCT CTH M, Juneau, WI

Built 1960 Load: 35.6 t ADT: 130

USH 12-STH 16

Fair

Over: CP RR

0.9M E JCT STH 82 TO E, Juneau, WI

Built 1950 Load: 37.3 t ADT: 3,200

IH 90 EB-IH 94 EB

Fair

Over: USH 12-STH 16

6.6M E JCT CTH HH (C), Juneau, WI

Built 1964 Load: 37.3 t ADT: 18,750

IH 90 WB-IH 94 WB

Fair

Over: USH 12-STH 16

2.0M W JCT STH 13 (MP86), Juneau, WI

Built 1964 Load: 37.3 t ADT: 18,750

IH 90 EB-IH 94 EB

Fair

Over: LRD HOG ISLAND RD/CN RR

6.3M E JCT CTH C TO W, Juneau, WI

Built 1964 Load: 37.3 t ADT: 17,900

IH 90 WB-IH 94 WB

Fair

Over: LRD HOG ISLAND RD/UP RR

0.4M W JCT STH 80 TO N, Juneau, WI

Built 1964 Load: 37.3 t ADT: 17,900

CTH W

Fair

Over: SEYMOUR CREEK

0.9M N JCT STH 80, Juneau, WI

Built 1994 Load: 37.3 t ADT: 225

CTH W

Fair

Over: BARABOO RIVER

0.2M N JCT STH 80, Juneau, WI

Built 1996 Load: 37.3 t ADT: 242

USH 12-STH 16

Fair

Over: ONE MILE CREEK

0.5M E JCT CTH K, Juneau, WI

Built 1973 Load: 38.9 t ADT: 3,200

CTH G

Fair

Over: CASTLE ROCK FLOWAGE

2.4M S JCT CTH Q, Juneau, WI

Built 1982 Load: 38.9 t ADT: 904

CTH I

Fair

Over: CROSSMAN CREEK

3.5M N JCT STH 33, Juneau, WI

Built 1982 Load: 38.9 t ADT: 231

LRD 2ND AVE SOUTH

Fair

Over: LEMONWEIR RIVER

2.3M S JCT STH 21, Juneau, WI

Built 1975 Load: 39.2 t ADT: 52

CTH H

Fair

Over: LEMONWEIR RIVER

2.5M S JCT STH 21, Juneau, WI

Built 1992 Load: 40.5 t ADT: 336

CTH FF

Fair

Over: BARABOO RIVER

0.3M W JCT STH 33, Juneau, WI

Built 2002 Load: 40.5 t ADT: 426

LRD 7TH ST W

Fair

Over: NEAL LATERAL

1.9M E JCT STH 173, Juneau, WI

Built 1989 Load: 42.1 t ADT: 35

USH12-STH16

Fair

Over: WEBSTER CREEK

CITY OF NEW LISBON, Juneau, WI

Built 1920 Load: 42.1 t ADT: 4,500

USH 12-STH 16

Fair

Over: BREWER CREEK

5.2M E JCT STH 80 TO S, Juneau, WI

Built 1932 Load: 42.1 t ADT: 4,500

USH 12-STH 16

Fair

Over: SEVEN MILE CREEK

2.2M E JCT CTH O (C), Juneau, WI

Built 1988 Load: 43.7 t ADT: 2,300

STH 58

Fair

Over: BR LITTLE ONE MILE CREEK

0.2M N JCT CTH I, Juneau, WI

Built 1937 Load: 43.7 t ADT: 1,700

LRD 20TH ST WEST

Fair

Over: RYNEARS FLOWAGE

1.2M N JCT STH 21, Juneau, WI

Built 1991 Load: 45.4 t ADT: 112

CTH HH

Fair

Over: HOLTZLANDER CR

TOWN OF KILDARE, Juneau, WI

Built 2002 Load: 47.0 t ADT: 1,554

STH 82

Fair

Over: CLEAVER CREEK

0.4M E JCT STH 80 TO N, Juneau, WI

Built 1967 Load: 53.5 t ADT: 3,500

LRD 6TH AVE

Good

Over: IH 90-IH 94

0.7MI N JCT USH12/STH16, Juneau, WI

Built 1964 Load: 9.7 t ADT: 470

LRD 23RD ST

Good

Over: BR LITTLE YELLOW RIVER

4.6M W JCT STH 80, Juneau, WI

Built 1971 Load: 9.7 t ADT: 47

LRD MEYER RD

Good

Over: IH 90-IH 94

2.5M W JCT CTH Q, Juneau, WI

Built 1964 Load: 19.4 t ADT: 120

STH 80-E BRIDGE ST

Good

Over: IH 90-IH 94

1.0M N JCT USH 12 TO W, Juneau, WI

Built 1964 Load: 21.1 t ADT: 3,300

LRD TOWN LINE RD

Good

Over: ONE MILE CREEK

0.4M E JCT STH 58, Juneau, WI

Built 1971 Load: 22.7 t ADT: 95

LRD SPRAGUE MATHER

Good

Over: BEAVER CREEK

0.7M E JCT CTH H, Juneau, WI

Built 1973 Load: 27.5 t ADT: 80

STH 80

Good

Over: LITTLE YELLOW RIVER

2.2M N JCT CTH A, Juneau, WI

Built 1980 Load: 29.2 t ADT: 1,700

LRD MONROE ST (DEA

Good

Over: LEMONWEIR RIVER

0.2M W JCT HY 58, Juneau, WI

Built 1969 Load: 29.2 t ADT: 950

LRD 23RD ST

Good

Over: LITTLE YELLOW RIVER

4.3M W JCT STH 80, Juneau, WI

Built 1971 Load: 29.2 t ADT: 86

CTH H

Good

Over: BR SHERMAN CREEK

0.9M W JCT STH 80, Juneau, WI

Built 2004 Load: 30.8 t ADT: 274

LRD 1ST AVE SOUTH

Good

Over: BEAR CREEK

2.1M W JCT CTH H, Juneau, WI

Built 1965 Load: 30.8 t ADT: 47

IH 90 WB-IH 94 WB

Good

Over: SEVEN MILE CREEK

6.8M W JCT CTH HH TO N, Juneau, WI

Built 1964 Load: 32.4 t ADT: 17,350

STH 82

Good

Over: CLEAVER CREEK

1.0M E JCT STH 80 TO N, Juneau, WI

Built 1986 Load: 32.4 t ADT: 3,500

STH 82

Good

Over: TRIB CLEAVER CREEK

1.6M E JCT STH 80 TO N, Juneau, WI

Built 1986 Load: 32.4 t ADT: 3,500

CTH A

Good

Over: FOUNTAIN CREEK

0.5M E JCT CTH H, Juneau, WI

Built 1987 Load: 32.4 t ADT: 890

STH 58-STH 82-UNIO

Good

Over: LEMONWEIR RIVER

0.1M N JCT USH 12 TO E, Juneau, WI

Built 1987 Load: 32.4 t ADT: 1,600

STH 58

Good

Over: LITTLE YELLOW RIVER

0.8M N JCT CTH A, Juneau, WI

Built 1990 Load: 32.4 t ADT: 3,800

LRD 7TH AVE

Good

Over: DANIELSON LATERAL

6.1M W JCT STH 80, Juneau, WI

Built 1991 Load: 32.4 t ADT: 23

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.