Bridge conditions in Suffolk County, New York
369 inventoried bridges · 7 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 369 bridges in Suffolk County: 98 rated good, 264 fair, and 7 poor.
- 7 of the 369 bridges in Suffolk County, New York, are rated in poor condition (1.9%) in the 2025 National Bridge Inventory, as of .
- 98 bridges (26.6%) are rated good and 264 (71.5%) fair.
- The median Suffolk County bridge was built in 1968.
- The busiest poor-rated bridge is Rte 27 over North Rd (built 1959), carrying about 39,182 vehicles a day.
Good 26.6% · Fair 71.5% · Poor 1.9% of 369 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 27 over North Rd | 1959 | 39,182 | Poor |
| Nicolls Road NB over Portion Road Portion Ro | 1970 | 36,843 | Poor |
| Lincoln Ave over 27 27 07051193 Rte 27 | 1996 | 10,648 | Poor |
| Floyd Pkwy Ext over Narrow Bay | 1959 | 4,381 | Poor |
| Cranberry Hole Rd over Long Island-mk Br | 1895 | 1,327 | Poor |
| River Avenue over Long Island-mk Br | 1907 | 337 | Poor |
| Park Road over Connetquot Brook | 1900 | – | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Rte 908M over Carlls River Pedestrian | 1933 | 139,208 | Fair |
| Rte 908M over Belmont Pk Entr | 1962 | 139,208 | Good |
| Rte 908M over Straight Path | 1941 | 138,738 | Fair |
| Rte I495 over Wicks Road | 1964 | 117,074 | Good |
| Rte I495 over Crooked Hill Rd | 1964 | 103,263 | Fair |
| Rte 908K over Pine Aire Drive | 1951 | 97,012 | Fair |
| Rte 27 over Howells Road | 1970 | 95,936 | Fair |
| Rte 27 over Howells Road | 1971 | 95,936 | Fair |
| Rte 27 over Manor Lane | 1972 | 95,936 | Fair |
| Rte 27 over Saxon Ave | 1985 | 94,008 | Good |
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.