County profile · official public datasets

Windsor County, VT

483 public highway bridges tracked in the FHWA National Bridge Inventory: 47.6% rated Good, 48.2% Fair, 4.1% Poor.

483
Public bridges: 47.6%
Good condition: 4.1%
Poor condition

The verdict

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

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

13th
of 14 on Poor share: 4.1%
Poor-condition share: 483
public highway bridges: 1965
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.

Windsor County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Windsor County ranks #13 of 14 Vermont counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 4.1%). Windsor County, Vermont contains 483 public highway bridges. Roughly 47.6% are rated “Good,” 48.2% “Fair,” and 4.1% “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

483

Public highway bridges in Windsor County

Good condition

47.6%

230 of 483 rated 7-9

Fair condition

48.2%

233 of 483 rated 5-6

Poor condition

4.1%

20 of 483 rated 4 or below

In-state Poor-share rank

#13 of 14

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

Condition distribution

Share of 483 NBI-tracked bridges by lowest applicable component rating.

Good

47.6% (230)

Fair

48.2% (233)

Poor

4.1% (20)

Windsor County's Poor-condition bridges carry 87,295 vehicle crossings a day

That is 4.6% of the county's reported daily bridge traffic on 4.1% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 4,365 crossings a day against 2,346 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 483 of 483 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

68.9% of Windsor County's bridges have passed the 50-year mark

333 of the 483 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 47.6% 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 23% of the county's Poor-condition bridge traffic

I-89 NB over CONNECTICUT RIVER NECRR, built 1966, carries 20,105 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 20-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 87,295 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

pre-1900

8
1900s

7
1910s

19
1920s

34
1930s

64
1940s

24
1950s

24
1960s

111
1970s

56
1980s

25
1990s

24
2000s

26
2010s

50
2020s

11

What this shows Construction peaked in the 1960s, when 111 of the county's bridges still in the inventory were built, which is 23% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year (1965) matches the Vermont average (1964).

How Windsor County compares with Vermont's closest counties by inventory size

The 5 Vermont counties nearest Windsor County in number of bridges, with their condition splits. Its 4.1% Poor share is the 5th-lowest of these 6. Its average build year of 1965 against a peer-group mean of 1963 is in line with the group.

Showing the 5 closest of 13 Vermont counties eligible for comparison.

Bridge inventory size and condition shares for Windsor County and the 5 Vermont counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Windsor County (this page)	483	47.6%	48.2%	4.1%	1965
Windham County	337	52.2%	42.7%	5%	1960
Rutland County	266	51.5%	45.9%	2.6%	1967
Washington County	248	49.6%	46.8%	3.6%	1961
Caledonia County	247	53%	45.3%	1.6%	1965
Bennington County	215	57.2%	41.9%	0.9%	1964

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

Similar inventory size

Nearest county inventories outside VT (483 bridges here).

Cattaraugus County, NY · 484 bridges
Tuscaloosa County, AL · 482 bridges
Lycoming County, PA · 482 bridges
Lauderdale County, MS · 481 bridges

Similar average build year

Nearest mean year-built outside VT (1965 here).

Bedford County, PA · avg 1965 · 417 bridges
Crawford County, PA · avg 1965 · 399 bridges
Harper County, KS · avg 1965 · 372 bridges
Columbia County, PA · avg 1965 · 271 bridges

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

All 483 Good 230 Fair 233 Poor 20

All bridges (483)

Sort:

Windsor County Bridge Snapshot

Condition distribution

Windsor County's Poor-condition bridges carry 87,295 vehicle crossings a day

68.9% of Windsor County's bridges have passed the 50-year mark

One structure carries 23% of the county's Poor-condition bridge traffic

How Windsor County compares with Vermont'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 (483)

C3093

C4046

C2006

C3015

C3046

C3065

C3037

C3093

C2002

C3118

C3060

C3035

C3UN1

RES ACCESS RD

C2001

C3077

C3007

C3012

C3078

C3029

C3040

C3009

C3055

C3011

C2002

C3018

C3010

C3019

C4082

C2002

US 00005 ML

C2004

C2005

C2006

TR 03 FAS 177

C2009

C3092

C3007

C3051

C3122

C2010

C2010

C2010

C3726

C3738

PARK STREET

C3066

C3063

VT 0010A ALT

C3038

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