County profile · official public datasets

Windham County, VT

337 public highway bridges tracked in the FHWA National Bridge Inventory: 52.2% rated Good, 42.7% Fair, 5% Poor.

337
Public bridges: 52.2%
Good condition: 5%
Poor condition

The verdict

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

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

14th
of 14 on Poor share: 5%
Poor-condition share: 337
public highway bridges: 1960
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.

Windham County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Windham County ranks #14 of 14 Vermont counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 5%). Windham County, Vermont contains 337 public highway bridges. Roughly 52.2% are rated “Good,” 42.7% “Fair,” and 5% “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

337

Public highway bridges in Windham County

Good condition

52.2%

176 of 337 rated 7-9

Fair condition

42.7%

144 of 337 rated 5-6

Poor condition

17 of 337 rated 4 or below

In-state Poor-share rank

#14 of 14

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

Condition distribution

Share of 337 NBI-tracked bridges by lowest applicable component rating.

Good

52.2% (176)

Fair

42.7% (144)

Poor

5% (17)

Windham County's Poor-condition bridges carry 37,593 vehicle crossings a day

That is 3.7% of the county's reported daily bridge traffic on 5% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 2,211 crossings a day against 3,006 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 337 of 337 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

66.8% of Windham County's bridges have passed the 50-year mark

225 of the 337 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 52.2% 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 35.1% of the county's Poor-condition bridge traffic

I 00091 ML over I 91 OVER TH 1 SAXTON, built 1963, carries 13,200 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 17-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 37,593 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

pre-1900

6
1900s

3
1910s

15
1920s

17
1930s

88
1940s

18
1950s

30
1960s

42
1970s

23
1980s

22
1990s

23
2000s

11
2010s

37
2020s

2

What this shows Construction peaked in the 1930s, when 88 of the county's bridges still in the inventory were built, which is 26.1% of those with a recorded year. That cohort is now 85 to 94 years old in the 2024 inventory. Its average build year (1960) matches the Vermont average (1964).

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

The 5 Vermont counties nearest Windham County in number of bridges, with their condition splits. Its 5% Poor share is the 6th-lowest of these 6. Its average build year of 1960 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 Windham County and the 5 Vermont counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Windham County (this page)	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
Orange County	208	50.5%	47.6%	1.9%	1959

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

Similar inventory size

Nearest county inventories outside VT (337 bridges here).

Placer County, CA · 337 bridges
Tama County, IA · 337 bridges
Cowley County, KS · 337 bridges
Ouachita County, LA · 337 bridges

Similar average build year

Nearest mean year-built outside VT (1960 here).

Plymouth County, MA · avg 1960 · 287 bridges
Cheshire County, NH · avg 1960 · 192 bridges
Washington County, NY · avg 1960 · 189 bridges
Cherokee County, AL · avg 1960 · 167 bridges

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

All 337 Good 176 Fair 144 Poor 17

All bridges (337)

Sort:

Windham County Bridge Snapshot

Condition distribution

Windham County's Poor-condition bridges carry 37,593 vehicle crossings a day

66.8% of Windham County's bridges have passed the 50-year mark

One structure carries 35.1% of the county's Poor-condition bridge traffic

How Windham 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 (337)

C2002

C2006

C3026

C2004

VT 00112 ML

C2001

VT 00011 ML

TR 01 FAS 106

TR 02 FAS 106

C2001

C2001

VT 00100 ML

VT 00100 ML

C2001

C2001

VT 00009 ML

VT 00100 ML

VT 00100 ML

C3035

VT 00009 ML

C2001

C2001

VT 00030 ML

TR 02 FAS 129

TR 00TH1

C2001

C2001

C3039

VT 00100 ML

C2001

VT 00100 ML

VT 00030 ML

ACCESS RD

C2001

C2001

C2003

C2001

C2001

C2003

VT 00112 ML

TR 02 FAS 106

TR 02 FAS 123

TR 01 FAS 126

C2001

C3005

TR 01 FAS 106

C2002

C2001

C2003

VT 00100 ML

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