Total bridges
184
Public highway bridges in Chittenden County
County profile · official public datasets
Chittenden County, VT
184 public highway bridges tracked in the FHWA National Bridge Inventory: 54.9% rated Good, 42.9% Fair, 2.2% Poor.
- 184
- Public bridges
- 54.9%
- Good condition
- 2.2%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Chittenden County posts a better-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- Top 43%
- lowest Poor share in state
- 2.2%
- Poor-condition share
- 184
- public highway bridges
- 1967
- 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.
Chittenden County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Chittenden County ranks #6 of 14 Vermont counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 2.2%). Chittenden County, Vermont contains 184 public highway bridges. Roughly 54.9% are rated “Good,” 42.9% “Fair,” and 2.2% “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.
Good condition
54.9%
101 of 184 rated 7-9
Fair condition
42.9%
79 of 184 rated 5-6
Poor condition
2.2%
4 of 184 rated 4 or below
In-state Poor-share rank
#6 of 14
Among Vermont counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 184 NBI-tracked bridges by lowest applicable component rating.
Good 54.9% (101)
Fair 42.9% (79)
Poor 2.2% (4)
Chittenden County's Poor-condition bridges carry 26,410 vehicle crossings a day
That is 1.1% of the county's reported daily bridge traffic on 2.2% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 6,603 crossings a day against 11,004 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 184 of 184 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
64.7% of Chittenden County's bridges have passed the 50-year mark
119 of the 184 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 54.9% 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 67.4% of the county's Poor-condition bridge traffic
US 00002 ML over I 89 UNDER US 2, built 1964, carries 17,800 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 4-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 26,410 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Chittenden County's bridges were built
184 bridges with a recorded construction year, grouped by decade
- pre-1900 3
Built before 1900
3 bridges
- 1910s 7
1910–1919
7 bridges
- 1920s 9
1920–1929
9 bridges
- 1930s 17
1930–1939
17 bridges
- 1940s 10
1940–1949
10 bridges
- 1950s 6
1950–1959
6 bridges
- 1960s
1960–1969
66 bridges
- 1970s 6
1970–1979
6 bridges
- 1980s 10
1980–1989
10 bridges
- 1990s 23
1990–1999
23 bridges
- 2000s 14
2000–2009
14 bridges
- 2010s 8
2010–2019
8 bridges
- 2020s 5
2020–2029
5 bridges
What this shows Construction peaked in the 1960s, when 66 of the county's bridges still in the inventory were built, which is 35.9% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year (1967) matches the Vermont average (1964).
How Chittenden County compares with Vermont's closest counties by inventory size
The 5 Vermont counties nearest Chittenden County in number of bridges, with their condition splits. Its 2.2% Poor share is the 4th-lowest of these 6. Its average build year of 1967 against a peer-group mean of 1964 is in line with the group.
Showing the 5 closest of 13 Vermont counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Bennington County | 215 | 57.2% | 41.9% | 0.9% | 1964 |
| Orange County | 208 | 50.5% | 47.6% | 1.9% | 1959 |
| Chittenden County (this page) | 184 | 54.9% | 42.9% | 2.2% | 1967 |
| Orleans County | 181 | 52.5% | 44.8% | 2.8% | 1971 |
| Franklin County | 149 | 56.4% | 43.6% | 0% | 1963 |
| Addison County | 143 | 51.7% | 45.5% | 2.8% | 1965 |
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 Chittenden 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 Chittenden County, both outside Vermont so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside VT (184 bridges here).
- Independence County, AR · 184 bridges
- Mills County, IA · 184 bridges
- Henderson County, KY · 184 bridges
- Adams County, OH · 184 bridges
Similar average build year
Nearest mean year-built outside VT (1967 here).
- Los Angeles County, CA · avg 1967 · 3,547 bridges
- Allegheny County, PA · avg 1967 · 1,294 bridges
- Sonoma County, CA · avg 1967 · 609 bridges
- Merced County, CA · avg 1967 · 528 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (184)
C3057
FairOver: BROOK
0.12 MI TO JCT CL2 TH1, Chittenden, VT
Built 1990 Load: 7.3 t ADT: 10
TR 01 FAS 211
FairOver: TEXAS HILL BROOK
6.0 MI S JCT. U.S.2, Chittenden, VT
Built 1939 Load: 12.7 t ADT: 2,100
TR 05 FAS 212
FairOver: HOLLOW BROOK
0.5 MI E VT.116, Chittenden, VT
Built 1940 Load: 15.4 t ADT: 1,600
C3014
FairOver: MILL BROOK
0.1 MI TO JCT W CL2 TH3, Chittenden, VT
Built 1919 Load: 16.3 t ADT: 10
C2003
FairOver: MILL BROOK
0.4 MI TO JCT W CL3 TH28, Chittenden, VT
Built 1949 Load: 16.3 t ADT: 750
C30WE
FairOver: NEW ENGLAND CENTRAL RR
0.05 MI TO JCT W ALLEN ST, Chittenden, VT
Built 1916 Load: 16.3 t ADT: 750
TR 03 FAS 208
FairOver: LAPLATTE RIVER
0.2 MI W JCT. VT.116, Chittenden, VT
Built 1948 Load: 16.3 t ADT: 1,800
BAY ROAD
FairOver: LAPLATTE RIVER
1.0 MI TO JCT W US7, Chittenden, VT
Built 1948 Load: 17.2 t ADT: 3,000
C3009
FairOver: HOLMES CREEK
0.2 MI TO JCT W CL3 TH43, Chittenden, VT
Built 1898 Load: 19.1 t ADT: 550
TR 01 FAS 211
FairOver: HUNTINGTON RIVER
2.6 MI N JCT. VT.17, Chittenden, VT
Built 1929 Load: 19.1 t ADT: 420
C2001
FairOver: PRESTON BROOK
0.01 MI TO JCT W C3 TH12, Chittenden, VT
Built 1939 Load: 20.0 t ADT: 500
VT 00015 ML
FairOver: THE CREEK
7.3 MI E JCT. VT.128, Chittenden, VT
Built 1938 Load: 20.0 t ADT: 5,800
I 00089 ML
FairOver: I 89 OVER TH NO 4
5.8 MI S EXIT 11, Chittenden, VT
Built 1964 Load: 22.7 t ADT: 28,200
TR 02 FAS 209
FairOver: LEE RIVER
2.1 MI S JCT. VT.15, Chittenden, VT
Built 1941 Load: 22.7 t ADT: 1,300
C3015
FairOver: JOINER BROOK
0.08 MI TO JCT W US2, Chittenden, VT
Built 1919 Load: 23.6 t ADT: 20
VT 00015 ML
FairOver: BROWNS RIVER
3.3 MI E JCT. VT.128, Chittenden, VT
Built 1929 Load: 23.6 t ADT: 10,100
US 00007 ML
FairOver: WINOOSKI RIVER
0.2 MI S JCT. VT.15, Chittenden, VT
Built 1928 Load: 24.5 t ADT: 31,300
VT 00015 ML
FairOver: ROARING BROOK
7.1 MI E JCT. VT.128, Chittenden, VT
Built 1938 Load: 25.4 t ADT: 8,100
TR 01 FAS 233
FairOver: BROWNS RIVER
3.0 MI E JCT. VT.15, Chittenden, VT
Built 1957 Load: 25.4 t ADT: 3,200
TR 00TH9
FairOver: TH NO 9 OVER I 89
2.0 MI N EXIT 16, Chittenden, VT
Built 1964 Load: 25.4 t ADT: 8,200
TR 01 FAS 211
FairOver: HUNTINGTON RIVER
7.0 MI N JCT. VT.17, Chittenden, VT
Built 1939 Load: 26.3 t ADT: 1,700
TR 01 FAS 209
FairOver: WINOOSKI RIVER
0.3 MI S JCT. U.S.2, Chittenden, VT
Built 1928 Load: 27.2 t ADT: 5,500
VT 0002A ALT
FairOver: ALLEN BROOK
0.8 MI NO. JCT. U.S.2, Chittenden, VT
Built 1936 Load: 27.2 t ADT: 12,800
C2003
FairOver: MILL BROOK
JCT OF CL2 TH3 & CL3 TH27, Chittenden, VT
Built 1939 Load: 28.1 t ADT: 850
C2003
FairOver: MILL BROOK
JCT OF CL2 TH3 & CL3 TH26, Chittenden, VT
Built 1939 Load: 28.1 t ADT: 880
US 00007 ML
FairOver: US 7 OVER N.E.C. RR
0.1 MI N JCT. VT.15, Chittenden, VT
Built 1952 Load: 28.1 t ADT: 13,600
C3020
FairOver: LEE RIVER
0.01 MI TO JCT W CL2 TH2, Chittenden, VT
Built 1914 Load: 29.0 t ADT: 10
VT 00116 ML
FairOver: HOLLOW BRK
9.8 MI N JCT. VT.17 E, Chittenden, VT
Built 1936 Load: 29.0 t ADT: 3,700
TR 01 FAS 233
FairOver: SEYMOUR RIVER
5.6 MI S JCT. VT.108, Chittenden, VT
Built 1927 Load: 29.0 t ADT: 1,000
C3009
FairOver: BROWNS RIVER
0.2 MI TO JCT W VT15, Chittenden, VT
Built 1964 Load: 29.9 t ADT: 500
US 00007 ML
FairOver: MALLETTS CREEK
1.0 MI N JCT. VT.2A, Chittenden, VT
Built 1924 Load: 30.8 t ADT: 12,100
CITY INDUS
FairOver: ALLEN BROOK
INDUSTRIAL AVE, Chittenden, VT
Built 1932 Load: 30.8 t ADT: 11,900
VT 00015 ML
FairOver: BEAVER BROOK
4.3 MI W JCT. VT.104 N, Chittenden, VT
Built 1931 Load: 32.7 t ADT: 5,800
TR 04 FAS 209
FairOver: MILL BROOK
3.3 MI N JCT. U.S.2, Chittenden, VT
Built 1927 Load: 32.7 t ADT: 1,300
C2007
FairOver: VERMONT RAILWAY
0.18 MI TO JCT W CL2 TH8, Chittenden, VT
Built 1966 Load: 34.5 t ADT: 1,900
C3023
FairOver: NEW ENGLAND CENTRAL RR
0.04 MI TO JCT W VT2A, Chittenden, VT
Built 1910 Load: 36.3 t ADT: 1,500
I 00089 ML
FairOver: I 89 OVER EB I189
EXIT 13 I 89-I 189 INTERS, Chittenden, VT
Built 1962 Load: 36.3 t ADT: 41,000
I 00089 ML
FairOver: I 89 OVER WIN. RIV.+TH16
0.3 MI N EXIT 11, Chittenden, VT
Built 1962 Load: 37.2 t ADT: 36,300
I 00089 ML
FairOver: I 89 OVER WIN. RIV.+TH16
0.3 MI N EXIT 11, Chittenden, VT
Built 1962 Load: 37.2 t ADT: 36,300
I 00089 ML
FairOver: I 89 OVER VT 2A
I 89 EXIT 12, Chittenden, VT
Built 1962 Load: 37.2 t ADT: 36,300
I 00089 ML
FairOver: I 89 OVER VT 2A
I 89 EXIT 12, Chittenden, VT
Built 1962 Load: 37.2 t ADT: 36,300
I 00089 ML
FairOver: I 89 OVER VT 15
I 89 EXIT 15, Chittenden, VT
Built 1962 Load: 37.2 t ADT: 56,400
I 00089 ML
FairOver: I 89 OVER TH NO 4
1.3 MI S EXIT 11, Chittenden, VT
Built 1964 Load: 38.1 t ADT: 28,200
I 00089 ML
FairOver: I 89 OVER US 7
I 89 EXIT 16, Chittenden, VT
Built 1963 Load: 38.1 t ADT: 39,500
I 00089 ML
FairOver: I 89 OVER US 7
I 89 EXIT 16, Chittenden, VT
Built 1963 Load: 38.1 t ADT: 39,500
I 00189 SPUR
FairOver: I 189 OVER SPEAR ST
0.3 MI W I89 EXIT 13, Chittenden, VT
Built 1962 Load: 38.1 t ADT: 36,800
I 00189 SPUR
FairOver: I 189 OVER SPEAR ST
0.3 MI W I89 EXIT 13, Chittenden, VT
Built 1962 Load: 38.1 t ADT: 36,800
TR 00TH1
FairOver: TH NO 1 OVER I 89
2.3 MI N EXIT 12, Chittenden, VT
Built 1962 Load: 38.1 t ADT: 500
C3033
FairOver: DONAHUE BROOK
0.27 MI TO JCT W CL2 TH4, Chittenden, VT
Built 1934 Load: 39.0 t ADT: 350
I 00089 ML
FairOver: I 89 OVER TH NO 4
1.3 MI S EXIT 11, Chittenden, VT
Built 1964 Load: 39.9 t ADT: 28,200
Read our methodology - how this data is sourced, computed, and verified.
Related
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.