Bridge conditions in Hamilton County, New York
87 inventoried bridges · 13 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Hamilton County has 13 bridges rated poor out of 87 inventoried, a 14.9% share that puts it well above the national rate of about 7%.
- 13 of the 87 bridges in Hamilton County, New York, are rated in poor condition (14.9%) in the 2025 National Bridge Inventory, as of .
- 30 bridges (34.5%) are rated good and 44 (50.6%) fair.
- The median Hamilton County bridge was built in 1969.
- The busiest poor-rated bridge is Rte 30 over Big Brook (built 1938), carrying about 1,095 vehicles a day.
Good 34.5% · Fair 50.6% · Poor 14.9% of 87 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 |
|---|---|---|---|
| Rte 30 over Big Brook | 1938 | 1,095 | Poor |
| Rte 10 over W Br Sacandaga River | 1930 | 302 | Poor |
| Big Brook Road over Big Brook | 1945 | 230 | Poor |
| Cedar River Road over Browns Brook | 1966 | 117 | Poor |
| Otter Brook Road over Otter Brook | 1968 | 103 | Poor |
| Old Piseco Road over Mill Stream | 1931 | 85 | Poor |
| Old Piseco Road over Cold Stream | 1931 | 85 | Poor |
| Old Piseco Road over Fall Stream | 1931 | 85 | Poor |
| North Point Rd over South Pond Outlet | 1930 | 70 | Poor |
| Red River Road over Red River | 1965 | 59 | Poor |
| Jessup River Road over Jessup River | 1990 | 19 | Poor |
| Kempshall Mountain over Fishing Brook | 2016 | 10 | Poor |
| Nysdec Road over Round Lake Outlet | 1995 | – | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Rte 28 over Fourth Lake Estur | 1992 | 2,780 | Fair |
| Rte 8 over Sacandaga River | 1968 | 2,490 | Good |
| Rte 28 over Lake Abanakee | 1994 | 2,309 | Fair |
| Rte 28 over Aldous Brook | 1962 | 2,309 | Fair |
| Rte 28 over Rock River | 1961 | 2,116 | Fair |
| Rte 28 over Cedar River | 1992 | 2,116 | Good |
| Rte 8 over Rogers Brook | 1950 | 1,980 | Fair |
| Rte 8 over Sacandaga Lk Outl | 1993 | 1,980 | Fair |
| Rte 30 over West Stoney Creek | 2006 | 1,706 | Good |
| Rte 30 over Sacandaga River | 2001 | 1,706 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of New York: New York 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.