County profile · official public datasets

Ozaukee County, WI

105 public highway bridges tracked in the FHWA National Bridge Inventory: 35.2% rated Good, 61.9% Fair, 2.9% Poor.

105
Public bridges: 35.2%
Good condition: 2.9%
Poor condition

The verdict

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

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

Top 7%
lowest Poor share in state: 2.9%
Poor-condition share: 105
public highway bridges: 1982
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.

Ozaukee County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Ozaukee County ranks #5 of 72 Wisconsin counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 2.9%). Ozaukee County, Wisconsin contains 105 public highway bridges. Roughly 35.2% are rated “Good,” 61.9% “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

105

Public highway bridges in Ozaukee County

Good condition

35.2%

37 of 105 rated 7-9

Fair condition

61.9%

65 of 105 rated 5-6

Poor condition

2.9%

3 of 105 rated 4 or below

In-state Poor-share rank

#5 of 72

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

Condition distribution

Share of 105 NBI-tracked bridges by lowest applicable component rating.

Good

35.2% (37)

Fair

61.9% (65)

Poor

2.9% (3)

Ozaukee County's Poor-condition bridges carry 1,693 vehicle crossings a day

That is 0.2% 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 564 crossings a day against 7,966 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 105 of 105 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

52.4% of Ozaukee County's bridges have passed the 50-year mark

55 of the 105 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 35.2% 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 82.7% of the county's Poor-condition bridge traffic

LRD CEDAR CREEK RD over CEDAR CREEK, built 1970, carries 1,400 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 3-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 1,693 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1910s

1
1920s

1
1930s

1
1940s

2
1950s

5
1960s

9
1970s

38
1980s

17
1990s

11
2000s

7
2010s

3
2020s

10

What this shows Construction peaked in the 1970s, when 38 of the county's bridges still in the inventory were built, which is 36.2% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year (1982) matches the Wisconsin average (1984).

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

The 5 Wisconsin counties nearest Ozaukee County in number of bridges, with their condition splits. Its 2.9% Poor share is the 1st-lowest of these 6. Its average build year of 1982 against a peer-group mean of 1989 is 7 years older.

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

Bridge inventory size and condition shares for Ozaukee County and the 5 Wisconsin counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Kenosha County	109	67%	29.4%	3.7%	1997
Ozaukee County (this page)	105	35.2%	61.9%	2.9%	1982
Price County	104	53.8%	35.6%	10.6%	1982
Bayfield County	103	56.3%	38.8%	4.9%	1990
Sawyer County	97	44.3%	43.3%	12.4%	1987
Kewaunee County	93	47.3%	47.3%	5.4%	1988

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

Similar inventory size

Nearest county inventories outside WI (105 bridges here).

Bradley County, AR · 105 bridges
Fulton County, AR · 105 bridges
Izard County, AR · 105 bridges
Calaveras County, CA · 105 bridges

Similar average build year

Nearest mean year-built outside WI (1982 here).

Oklahoma County, OK · avg 1982 · 1,216 bridges
Jackson County, MO · avg 1982 · 930 bridges
Champaign County, IL · avg 1982 · 727 bridges
Broward County, FL · avg 1982 · 686 bridges

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

All 105 Good 37 Fair 65 Poor 3

All bridges (105)

Sort:

Ozaukee County Bridge Snapshot

Condition distribution

Ozaukee County's Poor-condition bridges carry 1,693 vehicle crossings a day

52.4% of Ozaukee County's bridges have passed the 50-year mark

One structure carries 82.7% of the county's Poor-condition bridge traffic

How Ozaukee 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

All bridges (105)

LRD CEDAR SAUK RD

CTH B

CTH Y

IH 43 NB-STH 32 NB

IH 43 SB/STH 32 SB

CTH H

CTH V NB

STH 32 SB

LRD ARROWHEAD RD (

CTH D

CTH H

IH 43 SB

IH 43 SB-STH 32 SB

IH 43-STH 32-STH 5

CTH P

CTH I

LRD SAUK RD

CTH P

STH 57-STH 167-MEQ

LRD CEDAR BEACH RD

LRD SILVER BEACH R

IH 43 NB-STH 32 NB

LRD PIERRE LANE

LRD CEDAR BEACH RD

IH 43 SB-STH 57 SB

IH 43 NB-STH 32 NB

IH 43 SB-STH 32 SB

LRD KAEHLERS MILL

LRD GREEN BAY RD

STH 32-GRAND AVE

CTH B

IH 43 SB-STH 32 SB

IH 43-STH 32

LRD GREEN BAY RD

CTH C PIONEER RD

CTH T

LRD E BRIDGE ST

LRD HIGHLAND DR

LRD COLUMBIA ROAD

CTH NN

IH 43 NB-STH 57 NB

LRD MINK RANCH RD

STH 32 SB

STH 60

LRD FREISTADT ROAD

CTH LL

LRD ULAO PKWY

LRD SANDY BEACH RD

LRD MAIN STREET

CTH W RIVERSIDE DR

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