Bridge conditions in Herkimer County, New York
248 inventoried bridges · 28 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Herkimer County has 28 bridges rated poor out of 248 inventoried, a 11.3% share that puts it well above the national rate of about 7%.
- 28 of the 248 bridges in Herkimer County, New York, are rated in poor condition (11.3%) in the 2025 National Bridge Inventory, as of .
- 119 bridges (48.0%) are rated good and 101 (40.7%) fair.
- The median Herkimer County bridge was built in 1981.
- The busiest poor-rated bridge is Rte I90 over Knapp Creek (built 1954), carrying about 20,495 vehicles a day.
Good 48.0% · Fair 40.7% · Poor 11.3% of 248 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.
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Rte I90 over NYS Route 28 RTE 28 | 1954 | 20,495 | Fair |
| Rte I90 over NY Route 5 RTE 5 West | 1994 | 20,495 | Good |
| Rte I90 over Bridenbaker Creek | 1954 | 20,495 | Fair |
| Rte I90 over Burch Creek | 1954 | 20,495 | Fair |
| Rte I90 over Knapp Creek | 1954 | 20,495 | Poor |
| Rte I90 over Woods Creek | 1954 | 20,495 | Fair |
| Rte I90 over Budlong Creek | 1954 | 20,495 | Fair |
| Rte I90 over Exit 30 Ramp | 1955 | 19,533 | Fair |
| Rte 5 over Hydraulic Canal | 1949 | 16,239 | Fair |
| Rte 5 over Ex - CSX Transprtation | 1949 | 14,044 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
Every bridge in Herkimer County → - all 248, busiest first, each with its own condition record.
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.