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)

C3029

Good

Over: BLACK RIVER

0.02 MI TO JCT W VT131, Windsor, VT

Built 2007 Load: 46.3 t ADT: 30

C2003

Good

Over: BLACK RIVER

@ JCT W VT100, Windsor, VT

Built 1995 Load: 46.3 t ADT: 1,056

C2004

Good

Over: BLACK RIVER

0.01 MI TO JCT W VT100, Windsor, VT

Built 1919 Load: 46.3 t ADT: 150

VT 00107 ML

Good

Over: TWEED RIVER

0.1 MI E JCT. VT.100, Windsor, VT

Built 1992 Load: 46.3 t ADT: 2,400

VT 00044 ML

Good

Over: MILL BROOK

0.1 MI W JCT. U.S.5, Windsor, VT

Built 1969 Load: 46.3 t ADT: 3,400

VT 00012 ML

Good

Over: GULF STREAM

1.5 MI N JCT. U.S.4, Windsor, VT

Built 1956 Load: 46.3 t ADT: 1,600

C3019

Good

Over: GILEAD BROOK

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

Built 2014 Load: 47.2 t ADT: 40

C4080

Good

Over: LOCUST CREEK

0.01 MI TO JCT W VT12, Windsor, VT

Built 1999 Load: 48.1 t ADT: 35

C3004

Good

Over: BROOK

0.1 MI JCT TH 4 + TH 21, Windsor, VT

Built 1989 Load: 48.1 t ADT: 30

C3010

Good

Over: SO BR WILLIAMS RIVER

@ JCT W CL3 TH66, Windsor, VT

Built 1996 Load: 48.1 t ADT: 494

C3010

Good

Over: SO BR WILLIAMS RIVER

3.2 MI W OF INT VT35/TH3, Windsor, VT

Built 2022 Load: 48.1 t ADT: 190

C3032

Good

Over: BROOK

0.8 MI JCT VT106 & TH32, Windsor, VT

Built 2004 Load: 48.1 t ADT: 150

C3006

Good

Over: WILLOW BROOK

0.3 MI TO JCT W VT44, Windsor, VT

Built 1973 Load: 48.1 t ADT: 60

US 00005 ML

Good

Over: OTTAUQUECHEE RIVER

3.5 MI S JCT I91 EXIT 10, Windsor, VT

Built 1988 Load: 48.1 t ADT: 4,000

C3049

Good

Over: BROAD BROOK

0.1 MI E JCT TH 49 + TH4, Windsor, VT

Built 2011 Load: 49.0 t ADT: 10

C2006

Good

Over: WILLIAMS RIVER

0.3 MI TO JCT W VT103, Windsor, VT

Built 2014 Load: 49.0 t ADT: 90

VT 00011 ML

Good

Over: BROOK

2.1 MI W JCT. VT.106, Windsor, VT

Built 2007 Load: 49.0 t ADT: 5,100

VT 00012 ML

Good

Over: GULF STREAM

3.5 MI N JCT. U.S.4, Windsor, VT

Built 1999 Load: 49.0 t ADT: 1,700

C3068

Good

Over: LOCUST CREEK

@ JCT W CL3 TH70, Windsor, VT

Built 2015 Load: 49.9 t ADT: 20

C3035

Good

Over: WHITE RIVER

AT JCT TH 35 + VT 100, Windsor, VT

Built 2002 Load: 49.9 t ADT: 230

US 00005 ML

Good

Over: LULLS BROOK

0.3 MI S JCT. VT.12 N, Windsor, VT

Built 2006 Load: 49.9 t ADT: 4,800

TR 03 FAS 125

Good

Over: MID. BR WILLIAMS RIVER

0.2 MI S JCT. VT 11, Windsor, VT

Built 1940 Load: 49.9 t ADT: 680

TR 01 FAS 132

Good

Over: ANDOVER BRANCH

3.0 MI N JCT. VT.11, Windsor, VT

Built 1993 Load: 49.9 t ADT: 490

VT 00011 ML

Good

Over: WILLIAMS RIVER

0.4 MI E JCT. VT.103 S, Windsor, VT

Built 1939 Load: 49.9 t ADT: 3,900

VT 00012 ML

Good

Over: 3RD BR WHITE R. & NECRR

0.4 MI N JCT VT 107 E, Windsor, VT

Built 2006 Load: 49.9 t ADT: 4,000

C3005

Good

Over: N. BR OTTAUQUECHEE R

0.5 MI JCT TH 6 + TH 5, Windsor, VT

Built 1974 Load: 50.8 t ADT: 20

C3005

Good

Over: N BR OTTAUQUECHEE R

1.0 MI JCT TH 6 + TH 5, Windsor, VT

Built 2002 Load: 50.8 t ADT: 30

C2001

Good

Over: WHITE RIVER

AT JCT C2 TH 1 & VT 14, Windsor, VT

Built 2002 Load: 50.8 t ADT: 3,640

BRIDGE STREET

Good

Over: BLACK RIVER

BRIDGE STREET, Windsor, VT

Built 1989 Load: 50.8 t ADT: 2,490

VT 00103 ML

Good

Over: RELIEF CANAL

0.1 MI S JCT. VT.131, Windsor, VT

Built 1960 Load: 50.8 t ADT: 5,200

VT 00014 ML

Good

Over: FIRST BRANCH WHITE R.

0.1 MI N JCT. VT.110, Windsor, VT

Built 2005 Load: 50.8 t ADT: 3,100

VT 00012 ML

Good

Over: LOCUST CREEK

4.0 MI S JCT. VT.107 W, Windsor, VT

Built 2014 Load: 50.8 t ADT: 920

C3031

Good

Over: LILLIESVILLE BROOK

0.8 MI JCT TH 31 + TH 43, Windsor, VT

Built 1996 Load: 51.7 t ADT: 100

TR 01 FAS 166

Good

Over: MILL BROOK

1.6 MI W VT.14, Windsor, VT

Built 1983 Load: 51.7 t ADT: 390

C2005

Good

Over: WILLIAMS RIVER

0.25 MI TO JCT W VT103, Windsor, VT

Built 1940 Load: 52.6 t ADT: 530

C3036

Good

Over: STONY BROOK

0.7 MI TO JCT W CL3 TH51, Windsor, VT

Built 1977 Load: 52.6 t ADT: 25

TR 0TH33

Good

Over: TH NO 33 OVER I 91

0.5 MI N EXIT 12, Windsor, VT

Built 1967 Load: 52.6 t ADT: 150

C3021

Good

Over: WHITE RIVER

AT JCT TH 52 + TH 21, Windsor, VT

Built 2012 Load: 53.5 t ADT: 60

VT 00103 ML

Good

Over: WILLIAMS RIVER

1.7 MI N JCT. VT.10, Windsor, VT

Built 1962 Load: 53.5 t ADT: 5,700

VT 00103 ML

Good

Over: BLACK RIVER

0.3 MI S JCT. VT.100 S, Windsor, VT

Built 2017 Load: 53.5 t ADT: 10,000

C3008

Good

Over: MILL BROOK

0.15 MI TO JCT W VT106, Windsor, VT

Built 2008 Load: 54.4 t ADT: 230

C4058

Good

Over: BINGO BROOK

0.05 MI JCT TH 58 + TH28, Windsor, VT

Built 2009 Load: 54.4 t ADT: 10

VT 00100 ML

Good

Over: BRANCH BROOK

0.1 MI N JCT. VT.103 N, Windsor, VT

Built 1966 Load: 54.4 t ADT: 2,800

C3005

Good

Over: N. BR. OTTAUQUECHEE R.

0.1 MI JCT TH 11 + TH 5, Windsor, VT

Built 1997 Load: 55.3 t ADT: 30

C3038

Good

Over: POTASH BROOK

0.55 MI TO JCT W CL2 TH7, Windsor, VT

Built 1974 Load: 55.3 t ADT: 50

VT 00011 ML

Good

Over: MID. BR WILLIAMS RIVER

5.2 MI E JCT VT 121, Windsor, VT

Built 2009 Load: 55.3 t ADT: 3,100

US 00005 ML

Good

Over: I 91 UNDER US 5

2.1 MI N JCT. VT.12 N, Windsor, VT

Built 1965 Load: 55.3 t ADT: 2,200

C2002

Good

Over: LILLIESVILLE BROOK

AT JCT TH 13 & TH 2, Windsor, VT

Built 2008 Load: 57.2 t ADT: 300

C3006

Good

Over: MILL BROOK

0.3 MI TO JCT W CL3 TH16, Windsor, VT

Built 1983 Load: 57.2 t ADT: 320

C3047

Good

Over: LOCUST CREEK

0.85 MI TO JCT W CL3 TH5, Windsor, VT

Built 1977 Load: 58.1 t ADT: 50

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.