Total bridges
143
Public highway bridges in Addison County
County profile · official public datasets
Addison County, VT
143 public highway bridges tracked in the FHWA National Bridge Inventory: 51.7% rated Good, 45.5% Fair, 2.8% Poor.
- 143
- Public bridges
- 51.7%
- Good condition
- 2.8%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Addison County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- 9th
- of 14 on Poor share
- 2.8%
- Poor-condition share
- 143
- 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.
Addison County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Addison County ranks #9 of 14 Vermont counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 2.8%). Addison County, Vermont contains 143 public highway bridges. Roughly 51.7% are rated “Good,” 45.5% “Fair,” and 2.8% “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
51.7%
74 of 143 rated 7-9
Fair condition
45.5%
65 of 143 rated 5-6
Poor condition
2.8%
4 of 143 rated 4 or below
In-state Poor-share rank
#9 of 14
Among Vermont counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 143 NBI-tracked bridges by lowest applicable component rating.
Good 51.7% (74)
Fair 45.5% (65)
Poor 2.8% (4)
Addison County's Poor-condition bridges carry 11,490 vehicle crossings a day
That is 6.3% of the county's reported daily bridge traffic on 2.8% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 2,873 crossings a day against 891 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 143 of 143 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
60.8% of Addison County's bridges have passed the 50-year mark
87 of the 143 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 51.7% 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 93.1% of the county's Poor-condition bridge traffic
VT 0022A ALT over OTTER CREEK, built 1934, carries 10,700 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 11,490 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Addison County's bridges were built
143 bridges with a recorded construction year, grouped by decade
- pre-1900 4
Built before 1900
4 bridges
- 1900s 1
1900–1909
1 bridges
- 1910s 8
1910–1919
8 bridges
- 1920s 5
1920–1929
5 bridges
- 1930s
1930–1939
22 bridges
- 1940s
1940–1949
9 bridges
- 1950s
1950–1959
16 bridges
- 1960s
1960–1969
15 bridges
- 1970s
1970–1979
13 bridges
- 1980s
1980–1989
11 bridges
- 1990s 7
1990–1999
7 bridges
- 2000s
2000–2009
11 bridges
- 2010s
2010–2019
16 bridges
- 2020s 5
2020–2029
5 bridges
What this shows Construction peaked in the 1930s, when 22 of the county's bridges still in the inventory were built, which is 15.4% of those with a recorded year. That cohort is now 85 to 94 years old in the 2024 inventory. Its average build year (1965) matches the Vermont average (1964).
How Addison County compares with Vermont's closest counties by inventory size
The 5 Vermont counties nearest Addison County in number of bridges, with their condition splits. Its 2.8% Poor share is the 5th-lowest of these 6. Its average build year of 1965 against a peer-group mean of 1965 is in line with the group.
Showing the 5 closest of 13 Vermont counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Orange County | 208 | 50.5% | 47.6% | 1.9% | 1959 |
| Chittenden County | 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 (this page) | 143 | 51.7% | 45.5% | 2.8% | 1965 |
| Lamoille County | 127 | 54.3% | 41.7% | 3.9% | 1964 |
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 Addison 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 Addison County, both outside Vermont so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside VT (143 bridges here).
- Franklin County, AR · 143 bridges
- San Francisco County, CA · 143 bridges
- Woodson County, KS · 143 bridges
- Adair County, KY · 143 bridges
Similar average build year
Nearest mean year-built outside VT (1965 here).
- Bedford County, PA · avg 1965 · 417 bridges
- Crawford County, PA · avg 1965 · 399 bridges
- Harper County, KS · avg 1965 · 372 bridges
- Columbia County, PA · avg 1965 · 271 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (65)
C3044
FairOver: W. BR. DEAD CREEK
0.6 MI TO JCT W VT125, Addison, VT
Built 1919 Load: 7.3 t ADT: 50
C3006
FairOver: NEW HAVEN RIVER
@ JCT W CL2 TH1, Addison, VT
Built 1919 Load: 7.3 t ADT: 200
C3010
FairOver: MUDDY BRANCH
0.4 MI TO JCT C3 TH 8, Addison, VT
Built 1824 Load: 7.3 t ADT: 10
CITY SEYMORE
FairOver: OTTER CREEK
SEYMORE STREET, Addison, VT
Built 1853 Load: 7.3 t ADT: 1,400
TR 02 FAS 197
FairOver: LITTLE OTTER CREEK
0.2 MI TO JCT W CL3 TH 36, Addison, VT
Built 1951 Load: 8.2 t ADT: 2,100
C3009
FairOver: BR LITTLE OTTER CRK
0.2 MI TO JCT C3 TH 8, Addison, VT
Built 1919 Load: 9.1 t ADT: 200
C3022
FairOver: LEWIS CREEK
0.3 MI TO JCT W VT116, Addison, VT
Built 1990 Load: 12.7 t ADT: 20
C3034
FairOver: LITTLE OTTER CREEK
0.75 MI TO JCT W C3 TH14, Addison, VT
Built 1950 Load: 13.6 t ADT: 250
C3015
FairOver: NESHOBE RIVER
0.1 MI TO JCT W VT73, Addison, VT
Built 1960 Load: 13.6 t ADT: 30
C3002
FairOver: ROBBINS BR. WHITE R.
0.01 MI TO JCT W VT125, Addison, VT
Built 1937 Load: 13.6 t ADT: 100
C3033
FairOver: NEW HAVEN RIVER
AT JCT TH 33 & C2 TH 1, Addison, VT
Built 1941 Load: 13.6 t ADT: 200
C3002 FH10
FairOver: BR. OF NESHOBE R.
@ JCT W CL2 TH1, Addison, VT
Built 1939 Load: 15.4 t ADT: 100
VT 00017 ML
FairOver: BROOK
0.2 MI E JCT. U.S.7, Addison, VT
Built 1955 Load: 16.3 t ADT: 3,500
VT 00030 ML
FairOver: OTTER CREEK
0.2 MI S JCT. U.S.7, Addison, VT
Built 1893 Load: 16.3 t ADT: 8,200
TR 03 FAS 175
FairOver: SUCKER BROOK
3.7 MI E JCT. U.S.7, Addison, VT
Built 1945 Load: 17.2 t ADT: 1,700
C2005
FairOver: LITTLE OTTER CREEK
0.32 MI TO JCT W US7, Addison, VT
Built 1953 Load: 19.1 t ADT: 1,000
C3007
FairOver: OTTER CREEK
0.5 MI TO JCT C3 TH 25, Addison, VT
Built 1908 Load: 20.9 t ADT: 650
C2005
FairOver: NEW HAVEN RIVER
0.25 MI TO JCT W US7, Addison, VT
Built 1927 Load: 20.9 t ADT: 200
C2001
FairOver: NEW HAVEN RIVER
0.2 MI TO JCT C3 TH 5, Addison, VT
Built 1939 Load: 21.8 t ADT: 200
C2006
FairOver: MUDDY BRANCH
0.8 MI TO JCT C2 TH 6, Addison, VT
Built 1960 Load: 22.7 t ADT: 650
C3034
FairOver: LITTLE OTTER CREEK
0.2 MI TO JCT W CL2 TH1, Addison, VT
Built 1967 Load: 22.7 t ADT: 200
VT 00100 ML
FairOver: WHITE RIVER
3.4 MI N JCT. VT.125, Addison, VT
Built 1936 Load: 22.7 t ADT: 1,100
VT 00100 ML
FairOver: TUNNEL BROOK
0.8 MI S JCT VT 125, Addison, VT
Built 1976 Load: 22.7 t ADT: 1,900
TR 04 FAS 211
FairOver: HUNTINGTON RIVER
0.2 MI N JCT. VT.17, Addison, VT
Built 1962 Load: 22.7 t ADT: 420
TR 04 FAS 211
FairOver: HUNTINGTON RIVER
0.1 MI N JCT. VT.17, Addison, VT
Built 1962 Load: 22.7 t ADT: 420
VT 00100 ML
FairOver: ALDER MEADOW BROOK
6.9 MI N JCT. VT.125, Addison, VT
Built 1933 Load: 23.6 t ADT: 1,200
TR 03 FAS 186
FairOver: DEAD CREEK
3.6 MI W JCT. VT.22A, Addison, VT
Built 1948 Load: 23.6 t ADT: 1,800
VT 00100 ML
FairOver: ALDER MEADOW BROOK
5.3 MI N JCT. VT.125, Addison, VT
Built 1932 Load: 24.5 t ADT: 1,200
VT 0012A ALT
FairOver: E. GRANVILLE BROOK
8.9 MI N JCT. VT.12 S, Addison, VT
Built 1929 Load: 24.5 t ADT: 400
VT 00100 ML
FairOver: WHITE RIVER
2.3 MI N JCT. VT.125, Addison, VT
Built 1953 Load: 25.4 t ADT: 1,200
TR 01 FAS 188
FairOver: BEAVER MEADOW BROOK
3.1 MI E JCT. VT.116, Addison, VT
Built 1940 Load: 27.2 t ADT: 1,900
C2001
FairOver: BR. OF NESHOBE R.
0.25 MI TO JCT W CL3 TH2, Addison, VT
Built 1939 Load: 29.0 t ADT: 170
C2003
FairOver: BEAVER RIVER
@ JCT W CL3 TH8, Addison, VT
Built 1937 Load: 29.0 t ADT: 250
VT 00125 ML
FairOver: MIDDLEBURY RIVER
4.6 MI E JCT US 7, Addison, VT
Built 1928 Load: 29.0 t ADT: 1,500
US 00007 ML
FairOver: LEWIS CREEK
4.9 MI N JCT. VT.22A, Addison, VT
Built 1957 Load: 29.9 t ADT: 11,900
C2001
FairOver: POTASH BROOK
0.3 MI TO JCT W CL3 TH27, Addison, VT
Built 1938 Load: 30.8 t ADT: 400
VT 00100 ML
FairOver: ALDER MEADOW BROOK
6.7 MI N JCT. VT.125, Addison, VT
Built 1933 Load: 30.8 t ADT: 1,200
VT 00125 ML
FairOver: E. BR. DEAD CREEK
1.1 MI W JCT. VT.22A N, Addison, VT
Built 1936 Load: 30.8 t ADT: 1,700
C2001
FairOver: N. BR. MIDDLEBURY R.
0.6 MI TO JCT C3 TH 3, Addison, VT
Built 1934 Load: 31.8 t ADT: 180
TR 03 FAS 156
FairOver: NORTH FORK CREEK
2.0 MI W JCT VT 22A, Addison, VT
Built 1946 Load: 31.8 t ADT: 310
C3006
FairOver: BEAVER BROOK
0.6 MI TO JCT C3 TH 16, Addison, VT
Built 1986 Load: 32.7 t ADT: 200
VT 00125 ML
FairOver: MIDDLEBURY RIVER
4.2 MI E JCT. U.S.7, Addison, VT
Built 1978 Load: 32.7 t ADT: 2,600
C2001
FairOver: BROOK
0.1 MI TO JCT C3 TH 5, Addison, VT
Built 1950 Load: 33.6 t ADT: 200
C2002
FairOver: OTTER CREEK
0.08 MI TO JCT W CL3 TH9, Addison, VT
Built 1970 Load: 33.6 t ADT: 500
C3024
FairOver: E.BR.DEAD CREEK
0.65 MI TO JCT W VT22A, Addison, VT
Built 1949 Load: 34.5 t ADT: 100
C3025
FairOver: S. BR. MIDDLEBURY RIV.
0.01 MI TO JCT VT125, Addison, VT
Built 1970 Load: 36.3 t ADT: 20
VT 00100 ML
FairOver: ALDER MEADOW BROOK
5.7 MI N JCT. VT.125, Addison, VT
Built 1933 Load: 36.3 t ADT: 1,200
C3048
FairOver: LEMON FAIR RIVER
0.9 MI TO JCT W CL2 TH1, Addison, VT
Built 1991 Load: 40.8 t ADT: 218
VT 00100 ML
FairOver: HANCOCK BRANCH
0.1 MI S JCT. VT.125, Addison, VT
Built 1979 Load: 40.8 t ADT: 2,000
C2003
FairOver: LEWIS CREEK
0.3 MI TO JCT W VT116, Addison, VT
Built 1967 Load: 41.7 t ADT: 250
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.