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.

1910s

1
1920s

4
1930s

6
1950s

7
1960s

45
1970s

18
1980s

26
1990s

24
2000s

24
2010s

9
2020s

8

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).

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	Good	Fair	Poor	Avg. built
Jefferson County	182	57.1%	37.4%	5.5%	1987
Portage County	182	53.3%	44%	2.7%	1991
Taylor County	176	58.5%	30.1%	11.4%	1988
Juneau County (this page)	172	49.4%	47.7%	2.9%	1981
Waupaca County	169	76.3%	20.7%	3%	1984
Washington County	162	46.9%	44.4%	8.6%	1984

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).

Colbert County, AL · 172 bridges
Marshall County, AL · 172 bridges
Moultrie County, IL · 172 bridges
Newton County, IN · 172 bridges

Similar average build year

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

Franklin County, OH · avg 1981 · 922 bridges
Greenville County, SC · avg 1981 · 635 bridges
Montgomery County, OH · avg 1981 · 632 bridges
McLean County, IL · avg 1981 · 624 bridges

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

Fair-condition bridges (82)

Sort:

Juneau County Bridge Snapshot

Condition distribution

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

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

One structure carries 44.2% of the county's Poor-condition bridge traffic

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

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

Fair-condition bridges (82)

LRD FRANKIE RD

DANIELSON ROAD

CTH H

LRD 63RD ST

LRD KOVAL RD

LRD KOVAL RD

LRD WELCH PRAIRIE

LRD WELCH PRAIRIE

CTH M

CTH M

CTH N

LRD KEICHINGER RD

LRD MCEWEN RD

LRD 23RD ST

LRD PETROWITZ RD

LRD COUNTY LINE RD

CTH HH

LRD 24TH AVE

LRD 19TH AVE

LRD 19TH AVE

LRD SMITH RD

LRD DISPOSAL PLANT

LRD 55TH ST/CEMETE

CTH N

LRD 9TH ST EAST

IH 90 WB-IH 94 WB

CTH F

1st St. West

IH 90 EB-IH 94 EB

IH 90 WB-IH 94 WB

IH 90-IH 94

STH 80

STH 82

STH 82

CTH HH

STH 71/STATE BIKE

LRD 6TH AVE

STH 58

LRD FRIENDSHIP RD

IH 90 EB-IH 94 EB

IH 90 WB-IH 94 WB

IH 90 EB-IH 94 EB

LRD WASHINGTON ST

CTH F

CAMP ROAD

STH 21-3RD ST

IH 90 EB-IH 94 EB

STH 33-STH 80-STH

LRD 8TH ST EAST

STH 82

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