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.
Good-condition bridges (101)
C3039
GoodOver: LEWIS CREEK
0.01 MI TO JCT W C3 TH28, Chittenden, VT
Built 1849 Load: 6.4 t ADT: 250
C3014
GoodOver: LAPLATTE RIVER
0.52 MI TO JCT W CL2 TH1, Chittenden, VT
Built 1956 Load: 12.7 t ADT: 250
C2001
GoodOver: LAPLATTE RIVER
0.2 MI TO JCT W CL3 TH12, Chittenden, VT
Built 1957 Load: 13.6 t ADT: 1,230
C3023
GoodOver: LEWIS CREEK
0.17 MI S OF JCT TH27, Chittenden, VT
Built 1954 Load: 17.2 t ADT: 400
C3044
GoodOver: BROWNS RIVER
0.1 MI TO JCT W VT128, Chittenden, VT
Built 1967 Load: 21.8 t ADT: 50
I 00089 ML
GoodOver: I 89 OVER CAMP ROAD
1.1 MI S EXIT 17, Chittenden, VT
Built 1964 Load: 22.7 t ADT: 32,600
C3HUB
GoodOver: INDIAN BROOK
0.08 MI S JCT W VT15, Chittenden, VT
Built 1997 Load: 25.4 t ADT: 400
ETHAN ALLEN PRKWAY
GoodOver: E A PKY OVER VT 127
0.95 MI N JCT NORTH ST, Chittenden, VT
Built 1984 Load: 27.2 t ADT: 15,000
C2001
GoodOver: INDIAN BROOK
0.04 MI TO JCT US7, Chittenden, VT
Built 1992 Load: 32.7 t ADT: 2,000
C2008
GoodOver: HOLLOW BROOK
0.2 MI TO JCT W VT116, Chittenden, VT
Built 1949 Load: 32.7 t ADT: 500
C3013
GoodOver: THE CREEK
0.8 MI TO JCT W VT15, Chittenden, VT
Built 2018 Load: 32.7 t ADT: 740
C3005
GoodOver: BROOK
1 MI S OF JCT TH 51 & TH5, Chittenden, VT
Built 2019 Load: 32.7 t ADT: 915
C3DEN
GoodOver: INDIAN BROOK
0.05 MI S JCT TH410, Chittenden, VT
Built 2022 Load: 32.7 t ADT: 400
C3DEN
GoodOver: INDIAN BROOK
0.01 MI E JCT VT15, Chittenden, VT
Built 2021 Load: 32.7 t ADT: 400
I 00089 ML
GoodOver: I 89 OVER TH NO 12
1.8 MI S EXIT 18, Chittenden, VT
Built 1967 Load: 32.7 t ADT: 23,400
US 00002 ML
GoodOver: SNIPE ISLAND BROOK
4.2 MI E JCT VT 117, Chittenden, VT
Built 2017 Load: 32.7 t ADT: 2,300
CITY MARSHALL
GoodOver: MUDDY BROOK
MARSHALL AVE, Chittenden, VT
Built 2021 Load: 32.7 t ADT: 7,500
C3020
GoodOver: HUNTINGTON RIVER
0.01 MI TO JCT W CL2 TH1, Chittenden, VT
Built 1980 Load: 34.5 t ADT: 20
C3017
GoodOver: MUDDY BROOK
0.7 MI WEST OF TH 3, Chittenden, VT
Built 2000 Load: 34.5 t ADT: 1,410
US 00002 ML
GoodOver: LAMOILLE RIVER
2.1 MI W JCT. U.S.7 N, Chittenden, VT
Built 1980 Load: 34.5 t ADT: 9,400
TR 00TH6
GoodOver: TH NO 6 OVER I 89
3.1 MI N EXIT 17, Chittenden, VT
Built 1967 Load: 35.4 t ADT: 100
TR 00TH3
GoodOver: TH NO 3 OVER I 89
3.2 MI S EXIT 18, Chittenden, VT
Built 1967 Load: 35.4 t ADT: 100
C3022
GoodOver: BRUSH BROOK
0.03 MI TO JCT W C3 TH21, Chittenden, VT
Built 1992 Load: 36.3 t ADT: 187
C3013
GoodOver: BROWNS RIVER
0.5 MI TO JCT W VT15, Chittenden, VT
Built 1993 Load: 36.3 t ADT: 740
I 00089 ML
GoodOver: I 89 OVER EB I189
EXIT 13 I 89-I 189 INTERS, Chittenden, VT
Built 1962 Load: 36.3 t ADT: 41,000
C3029
GoodOver: LEWIS CREEK
0.04 MI TO JCT W C3 TH28, Chittenden, VT
Built 1995 Load: 37.2 t ADT: 50
C3017
GoodOver: BROWNS RIVER
0.2 MI TO JCT W VT15, Chittenden, VT
Built 1928 Load: 37.2 t ADT: 200
C2007
GoodOver: LAMOILLE RIVER
@ JCT W CL2 TH6, Chittenden, VT
Built 1997 Load: 37.2 t ADT: 915
I 00089 ML
GoodOver: LAMOILLE RIVER
3.7 MI N EXIT 17, Chittenden, VT
Built 2016 Load: 37.2 t ADT: 23,400
I 00089 ML
GoodOver: I 89 OVER VT 15
I 89 EXIT 15, Chittenden, VT
Built 1962 Load: 37.2 t ADT: 56,400
C3022
GoodOver: BRUSH BROOK
1.2 MI TO JCT W CL3 TH21, Chittenden, VT
Built 2016 Load: 38.1 t ADT: 270
I 00089 ML
GoodOver: I 89 OVER DORSET ST
DORSET STREET, Chittenden, VT
Built 1963 Load: 38.1 t ADT: 41,000
TR 01 FAS 211
GoodOver: HUNTINGTON RIVER
3.9 MI N JCT. VT.17, Chittenden, VT
Built 2017 Load: 38.1 t ADT: 780
VT 00128 ML
GoodOver: BROWNS RIVER
1.0 MI N JCT. VT.15, Chittenden, VT
Built 1940 Load: 38.1 t ADT: 4,200
C3036
GoodOver: LEWIS CREEK
0.01 MI TO JCT W CL2 TH1, Chittenden, VT
Built 1849 Load: 39.9 t ADT: 750
C2006
GoodOver: LEE RIVER
0.25 MI TO JCT W CL2 TH2, Chittenden, VT
Built 1968 Load: 39.9 t ADT: 850
I 00089 ML
GoodOver: I 89 OVER LAFOUNTAIN
0.1 MI N EXIT 15, Chittenden, VT
Built 1962 Load: 39.9 t ADT: 39,500
C3028
GoodOver: MILL BROOK
0.3 MI TO JCT W CL2 TH3, Chittenden, VT
Built 1982 Load: 40.8 t ADT: 100
C3059
GoodOver: THE CREEK
0.17 MI TO JCT W C3 TH13, Chittenden, VT
Built 2005 Load: 40.8 t ADT: 50
C2003
GoodOver: HUNTINGTON RIVER
0.01 MI TO JCT W C3 TH30, Chittenden, VT
Built 1937 Load: 40.8 t ADT: 1,345
C3033
GoodOver: ROARING BROOK
0.15 MI TO JCT W CL3 TH3, Chittenden, VT
Built 1937 Load: 40.8 t ADT: 50
VT 00289 ML
GoodOver: ALDER BROOK
0.9 MI E VT 15, Chittenden, VT
Built 1993 Load: 40.8 t ADT: 2,800
VT 00289 ML
GoodOver: ALDER BROOK
2.0 MI E JCT VT 15, Chittenden, VT
Built 1993 Load: 40.8 t ADT: 5,400
I 00089 ML
GoodOver: I 89 OVER TH NO 1
2.6 MI S EXIT 17, Chittenden, VT
Built 1964 Load: 40.8 t ADT: 32,600
TR 04 FAS 199
GoodOver: LEWIS CREEK
3.1 MI S JCT. VT.116, Chittenden, VT
Built 1940 Load: 40.8 t ADT: 4,700
MILL POND RD TH27
GoodOver: INDIAN BROOK
0.24 MI TO JCT W VT2A, Chittenden, VT
Built 2015 Load: 40.8 t ADT: 2,300
C3022
GoodOver: BRUSH BROOK
0.1 MI E OF JCT TH23, Chittenden, VT
Built 2001 Load: 41.7 t ADT: 20
I 00089 ML
GoodOver: I 89 OVER NECRR
0.2 MI S EXIT 15, Chittenden, VT
Built 1962 Load: 41.7 t ADT: 56,400
I 00089 ML
GoodOver: I 89 OVER NECRR
0.2 MI S EXIT 15, Chittenden, VT
Built 1962 Load: 41.7 t ADT: 56,400
TR 04 FAS 199
GoodOver: LAPLATTE RIVER
0.1 MI S JCT. VT.116, Chittenden, VT
Built 2011 Load: 41.7 t ADT: 4,700
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.