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.

When Windsor County's bridges were built

483 bridges with a recorded construction year, grouped by decade

bridges

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).

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

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 Poor
Windsor County (this page) 483 4.1%
Windham County 337 5%
Rutland County 266 2.6%
Washington County 248 3.6%
Caledonia County 247 1.6%
Bennington County 215 0.9%

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).

Similar average build year

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

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

Good-condition bridges (230)

C3043

Good

Over: BLOODY BROOK

0.2 MI TO JCT W CL3 TH12, Windsor, VT

Built 1989 Load: 32.7 t ADT: 125

C3008

Good

Over: MARSH BROOK

0.06 MI JCT TH9+TH8+TH7, Windsor, VT

Built 2012 Load: 32.7 t ADT: 25

C3018

Good

Over: BLOODY BROOK

0.3 MI TO JCT W TH 16, Windsor, VT

Built 2019 Load: 32.7 t ADT: 35

C3016

Good

Over: BLOODY BROOK

0.5 MI TO JCT W CL3 TH36, Windsor, VT

Built 1991 Load: 32.7 t ADT: 590

C3058

Good

Over: BLOODY BROOK

0.18 MI TO JCT W CL2 TH2, Windsor, VT

Built 1928 Load: 32.7 t ADT: 350

C3054

Good

Over: PINNEY HOLLOW BROOK

0.01 MI TO JCT W VT100A, Windsor, VT

Built 1974 Load: 32.7 t ADT: 20

C2001

Good

Over: DARBY BROOK

0.03 MI E OF JCT CL3 TH52, Windsor, VT

Built 2017 Load: 32.7 t ADT: 350

C3052

Good

Over: DARBY BROOK

0.02 MI N OF JCT CL2 TH1, Windsor, VT

Built 2014 Load: 32.7 t ADT: 40

C3051

Good

Over: STONY BROOK

0.03 MI TO JCT W C3 TH36, Windsor, VT

Built 2016 Load: 32.7 t ADT: 10

C3075

Good

Over: HAPPY VALLEY BROOK

0.2 MI JCT TH 75 + VT 4, Windsor, VT

Built 1996 Load: 32.7 t ADT: 75

VT 00100 ML

Good

Over: JEWELL BROOK

1.9 MI S JCT. VT.103, Windsor, VT

Built 2009 Load: 32.7 t ADT: 2,300

VT 00011 ML

Good

Over: SEAVER BROOK

2.0 MI W JCT US 5 S, Windsor, VT

Built 1966 Load: 32.7 t ADT: 10,000

US 00004 ML

Good

Over: KEDRON BROOK

0.2 MI E JCT. VT.106, Windsor, VT

Built 1935 Load: 32.7 t ADT: 9,900

US 4

Good

Over: CONNECTICUT RIVER

0.1 MI FROM VERMONT SL, Windsor, VT

Built 2015 Load: 32.7 t ADT: 10,626

I 00089 ML

Good

Over: I 89 OVER TH NO 46

0.4 MI S EXIT 1A, Windsor, VT

Built 1967 Load: 32.7 t ADT: 26,000

I 00089 ML

Good

Over: I 89 OVER TH NO 10

0.6 MI N EXIT 1A, Windsor, VT

Built 1967 Load: 32.7 t ADT: 18,800

I 00089 ML

Good

Over: I 89 OVER TH NO 4

1.6 MI N EXIT 2, Windsor, VT

Built 1968 Load: 32.7 t ADT: 15,800

I 00089 ML

Good

Over: I 89 OVER TH NO 13

4.3 MI N EXIT 1A, Windsor, VT

Built 1968 Load: 32.7 t ADT: 18,800

I 00089 ML

Good

Over: I 89 OVER TH NO 13

4.3 MI N EXIT 1A, Windsor, VT

Built 1968 Load: 32.7 t ADT: 18,800

VT 0100A ALT

Good

Over: PINNEY HOLLOW BROOK

2.0 MI N JCT VT 100, Windsor, VT

Built 1983 Load: 32.7 t ADT: 770

VT 00073 ML

Good

Over: BRANDON BROOK

6.7 MI W JCT. VT.100, Windsor, VT

Built 2014 Load: 32.7 t ADT: 700

VT 00073 ML

Good

Over: BRANDON BROOK

3.9 MI W JCT. VT.100, Windsor, VT

Built 2014 Load: 32.7 t ADT: 960

VT 00073 ML

Good

Over: CORPORATION BROOK

2.5 MI W JCT. VT.100, Windsor, VT

Built 2014 Load: 32.7 t ADT: 960

C3007

Good

Over: GILEAD BROOK

0.2 MI S JCT TH 22 + TH 7, Windsor, VT

Built 1989 Load: 33.6 t ADT: 84

C3010

Good

Over: N. BR. OTTAUQUECHEE R.

0.05 MI JCT TH 10 + TH 5, Windsor, VT

Built 1974 Load: 33.6 t ADT: 10

C3009

Good

Over: WILLIAMS RIVER

@ JCT OF CL3 TH14 & TH29, Windsor, VT

Built 1987 Load: 33.6 t ADT: 120

C3066

Good

Over: BLACK RIVER

0.04 MI TO JCT W VT11, Windsor, VT

Built 1929 Load: 33.6 t ADT: 300

VT 00100 ML

Good

Over: WEST RIVER

1.1 MI S JCT. VT.155, Windsor, VT

Built 2016 Load: 33.6 t ADT: 2,200

VT 00103 ML

Good

Over: JEWELL BROOK

0.1 MI N JCT. VT.100 S, Windsor, VT

Built 1931 Load: 33.6 t ADT: 9,500

I 00091 ML

Good

Over: I 91 OVER VT 44 MILLB

3.7 MI N EXIT 8, Windsor, VT

Built 2014 Load: 33.6 t ADT: 16,200

I 00091 ML

Good

Over: I 91 OVER VT 44 MILLB

3.7 MI N EXIT 8, Windsor, VT

Built 2013 Load: 33.6 t ADT: 16,200

VT 0100A ALT

Good

Over: OTTAUQUECHEE RIVER

0.1 MI S JCT. U.S.4, Windsor, VT

Built 2011 Load: 33.6 t ADT: 770

TR 08 FAS 168

Good

Over: OTTAUQUECHEE RIVER

0.1 MI N JCT. U.S.4 W, Windsor, VT

Built 2012 Load: 33.6 t ADT: 2,200

C3012

Good

Over: CHASE BROOK

0.2 MI TO JCT W CL3 TH9, Windsor, VT

Built 1977 Load: 34.5 t ADT: 20

C2004

Good

Over: BROAD BROOK

0.2 MI JCT TH 4 + TH 35, Windsor, VT

Built 1929 Load: 34.5 t ADT: 125

VT 00107 ML

Good

Over: WHITE RIVER

0.2 MI W JCT. VT.12 N, Windsor, VT

Built 2013 Load: 34.5 t ADT: 3,600

VT 00103 ML

Good

Over: S. BR. WILLIAMS RIVER

0.2 MI S JCT. VT.11 E, Windsor, VT

Built 2011 Load: 34.5 t ADT: 7,500

VT 00106 ML

Good

Over: KEDRON BROOK

4.3 MI S JCT. U.S.4, Windsor, VT

Built 2016 Load: 34.5 t ADT: 2,800

TR 0TH36

Good

Over: TH NO 36 OVER I 89

2.8 MI N EXIT 1A, Windsor, VT

Built 1967 Load: 34.5 t ADT: 100

C3029

Good

Over: LOCUST CREEK

0.3 MI TO JCT W VT12, Windsor, VT

Built 1974 Load: 35.4 t ADT: 50

C4005

Good

Over: BROOK

0.1 MI JCT TH 5 + TH 20, Windsor, VT

Built 2019 Load: 35.4 t ADT: 10

C3081

Good

Over: CONN. RIVER LINE R.R.

0.04 MI TO JCT W C3 TH30, Windsor, VT

Built 2011 Load: 35.4 t ADT: 350

C3036

Good

Over: STONY BROOK

0.85 MI TO JCT W C3 TH51, Windsor, VT

Built 1992 Load: 35.4 t ADT: 25

C3007

Good

Over: GREENDALE BROOK

2.71 MI TO JCT W VT100, Windsor, VT

Built 1940 Load: 35.4 t ADT: 10

TR 04 FAS 120

Good

Over: WEST RIVER

0.2 MI W JCT. VT.100, Windsor, VT

Built 1976 Load: 35.4 t ADT: 240

C2004

Good

Over: BROAD BROOK

0.5 MI JCT TH 4 + TH 34, Windsor, VT

Built 2014 Load: 36.3 t ADT: 125

VT 00014 ML

Good

Over: 2ND BRANCH WHITE R.

1.5 MI N JCT. VT.107, Windsor, VT

Built 2014 Load: 36.3 t ADT: 1,200

VT 00014 ML

Good

Over: 2ND BRANCH WHITE R.

2.0 MI N JCT. VT.107, Windsor, VT

Built 2015 Load: 36.3 t ADT: 1,200

C3007

Good

Over: GILEAD BROOK

0.1 MI JCT TH 7 + TH 19, Windsor, VT

Built 2014 Load: 37.2 t ADT: 50

C3079

Good

Over: LOCUST CREEK

0.3 MI JCT TH 79 + VT 12, Windsor, VT

Built 1927 Load: 37.2 t ADT: 100

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.