Lock Six Road over Champlain Canal
Washington County, New York · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Lock Six Road over Champlain Canal in Washington County, New York, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1907, making it 118 years old at the 2025 inventory.
- It carries about 110 vehicles a day (traffic count year 2017).
- Its listed owner is the state highway agency.
- It is one of 98 of the 189 inventoried bridges in Washington County rated fair (51.9%); 21 (11.1%) 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 condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated September 2024, on a 24-month routine inspection cycle.
- It has fracture-critical members (NBI item 92A): steel tension members without a redundant load path, which get their own scheduled inspections.
- 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 → (43.16087, -73.57989)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Steel through truss |
| Length | about 83 ft |
| Location | In Fort Miller |
| NBI structure number | 000000004418140 |
| Condition class | Fair |
| Traffic status (item 41) | Posted for another load-capacity restriction (speed, number of vehicles on the bridge, etc.) |
| Last inspection (item 90) | September 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
| Fracture critical (item 92A) | Yes |
Source: FHWA National Bridge Inventory, 2025 data as reported by the New York department of transportation.
Busiest bridges in Washington County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Rte 4 over D&h RR | 2003 | 13,716 | Good |
| Rte 197 over E Br Hudson River | 1916 | 12,957 | Fair |
| Rte 4 over Halfway Creek | 1994 | 11,474 | Fair |
| Rte 4 over Glens Falls Feeder Canal | 2017 | 10,279 | Good |
| Rte 29 over Hartshorn Brook | 1971 | 9,557 | Good |
| Rte 4 over Wood Creek | 2001 | 9,291 | Fair |
All bridges nearby: Washington County, NY bridge conditions · every bridge in Washington County · New York bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.