Bridge conditions in St. Lawrence County, New York
313 inventoried bridges · 18 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
18 of the 313 bridges the federal inventory lists in St. Lawrence County are rated poor; the rest split 193 good and 102 fair.
- 18 of the 313 bridges in St. Lawrence County, New York, are rated in poor condition (5.8%) in the 2025 National Bridge Inventory, as of .
- 193 bridges (61.7%) are rated good and 102 (32.6%) fair.
- The median St. Lawrence County bridge was built in 1981.
- The busiest poor-rated bridge is Rte 812 over Can.queens HWY.2 St.law (built 1960), carrying about 3,033 vehicles a day.
Good 61.7% · Fair 32.6% · Poor 5.8% of 313 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 812 over Can.queens HWY.2 St.law | 1960 | 3,033 | Poor |
| County Road 43 over Dodge Creek | 1983 | 1,155 | Poor |
| Eddy Pyrites Road over Harrison Crk Ovfl | 1931 | 620 | Poor |
| Rte 58 over Fish Creek | 1933 | 522 | Poor |
| Rte 184 over Fish Creek | 1932 | 470 | Poor |
| Rte 184 over Fish Creek | 1932 | 425 | Poor |
| Ames Road over Trout Brook | 1950 | 314 | Poor |
| County Road 54 over Allen Brook | 1928 | 253 | Poor |
| Blanchard Hill Rd over Plumb Brook | 1903 | 161 | Poor |
| Dekalb Jct Road over Indian Creek | 1928 | 152 | Poor |
| County Road 48A over Raquette River | 1892 | 152 | Poor |
| Emeryville Road over Power Inlet Chanl | 1980 | 149 | Poor |
| Mcewen Road over Allen Brook | 1984 | 125 | Poor |
| Talcville Road over Oswegatchie River | 1964 | 117 | Poor |
| Keenan Road over Hunkins Marsh | 1902 | 68 | Poor |
| Limkiln Road over Boland Creek | 1996 | 41 | Poor |
| Vrooman Road over Big Creek | 1978 | 7 | Poor |
| Mccarthy Road over Plumb Brook | 1985 | 4 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Rte 11 over Grasse River | 1981 | 15,615 | Good |
| Rte 11 over Grasse River | 1981 | 15,615 | Good |
| Rte 11 over Raquette River | 1982 | 11,484 | Good |
| Rte 37 over Oswegatchie River Trail | 1958 | 9,859 | Fair |
| Rte 37 over Rte 970E | 1958 | 9,859 | Fair |
| Rte 420 over Raquette River | 1966 | 9,594 | Fair |
| Rte 971U over Raquette River | 1923 | 9,043 | Good |
| Rte 971U over Raquette River | 1922 | 9,043 | Good |
| Rte 11 over Trout Brook | 1981 | 8,974 | Good |
| Rte 11 over CSX Transprtation | 1982 | 8,974 | 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.