Rte 420 over W Br St Regis Rvr

St. Lawrence County, New York · rated Fair in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

• Rte 420 over W Br St Regis Rvr in St. Lawrence County, New York, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
• Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
• It was built in 1949 and reconstructed in 2001, making it 76 years old at the 2025 inventory.
• It carries about 1,580 vehicles a day (traffic count year 2015).
• Its listed owner is the state highway agency.
• It is one of 102 of the 313 inventoried bridges in St. Lawrence County rated fair (32.6%); 18 (5.8%) are rated poor.
• Its traffic status in the 2025 inventory is posted for another load-capacity restriction (speed, number of vehicles on the bridge, etc.) (NBI item 41).
• Its class is unchanged from 2024 (fair), but component ratings moved: deck 5 to 6, superstructure 6 to 7.
• Its most recent inspection on record is dated September 2024, on a 24-month routine inspection cycle.
• A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

View this bridge on a map → (44.79096, -74.78561)

Component ratings

Bridge details

Source: FHWA National Bridge Inventory, 2025 data as reported by the New York department of transportation.

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Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.