Bridge conditions in Windham County, Vermont
338 inventoried bridges · 23 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Windham County tracks close to typical: 23 of its 338 inventoried bridges (6.8%) are rated poor, against a national rate of about 7%.
- 23 of the 338 bridges in Windham County, Vermont, are rated in poor condition (6.8%) in the 2025 National Bridge Inventory, as of .
- 149 bridges (44.1%) are rated good and 166 (49.1%) fair.
- The median Windham County bridge was built in 1958.
- The busiest poor-rated bridge is I 00091 Ml over I 91 over US 5 (built 1959), carrying about 18,300 vehicles a day.
Good 44.1% · Fair 49.1% · Poor 6.8% of 338 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 00091 Ml over I 91 over US 5 | 1959 | 18,300 | Poor |
| I 00091 Ml over I 91 over Vt 103 | 1963 | 15,000 | Poor |
| NH119 over Connecticut River | 1920 | 7,103 | Poor |
| Bridge Street over Connecticut River | 1930 | 6,100 | Poor |
| Vt 00009 Ml over N. Br. Deerfield River | 1934 | 4,400 | Poor |
| Vt 00960 Spur over I 91 Under Putney SH | 1961 | 3,500 | Poor |
| Vt 00112 Ml over E. Br North R | 1940 | 1,200 | Poor |
| US 00005 Ml over US 5 over Green Mt RR | 1929 | 970 | Poor |
| US 00005 Ml over Williams River | 1929 | 970 | Poor |
| C3448 over Power Dam Canal | 1909 | 600 | Poor |
| Tr 0th36 over Th No 36 over I 91 | 1960 | 600 | Poor |
| C3008 over Blue Brook | 1939 | 400 | Poor |
| C3026 over Rock River | 1939 | 180 | Poor |
| C3011 over Smith Brook | 1950 | 150 | Poor |
| C3014 over Green Mountain Rwy. | 1913 | 100 | Poor |
| C3004 over Fair Brook | 1939 | 50 | Poor |
| C3075 over Hinesburg Brook | 1930 | 35 | Poor |
| C3067 over North River | 1919 | 30 | Poor |
| C3009 over Bull Creek | 1900 | 20 | Poor |
| C3021 over East Putney Brook | 1930 | 20 | Poor |
| C3063 over North River | 1919 | 20 | Poor |
| Road over Deerfield River | 1979 | 10 | Poor |
| C3064 over North River | 1919 | 10 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 00091 Ml over I 91 over Th No 5 | 2017 | 24,200 | Good |
| I 00091 Ml over I 91 over Vt 30 Westr | 2017 | 24,200 | Good |
| I 00091 Ml over I 91 NB over Maple St | 1960 | 19,400 | Good |
| I 00091 Ml over I 91 SB over Maple St | 1960 | 19,400 | Good |
| I 00091 Ml over I 91 over Williams St | 2012 | 19,400 | Good |
| I 00091 Ml over I 91 over Williams St | 2012 | 19,400 | Good |
| I 00091 Ml over I 91 over Th No 29 | 1958 | 18,300 | Good |
| I 00091 Ml over I 91 over Th No 29 | 1958 | 18,300 | Good |
| I 00091 Ml over I 91 over Th 27 Broad | 1959 | 18,300 | Good |
| I 00091 Ml over I 91 over Th 27 Broad | 1959 | 18,300 | Good |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Vermont: Vermont bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.