Rte 11B over Trout Brook
St. Lawrence County, New York · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Rte 11B over Trout Brook in St. Lawrence County, New York, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1996, making it 29 years old at the 2025 inventory.
- It carries about 2,424 vehicles a day (traffic count year 2018).
- 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 open, no restriction (NBI item 41).
- It was rated good in the 2024 inventory and is now fair (deck 7 to 6).
- Its most recent inspection on record is dated August 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 → (44.68516, -74.80416)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 6 | Satisfactory condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Prestressed concrete multiple box beam |
| Length | about 62 ft |
| Location | 4.8 Mi W Jct SH 11B & SH |
| NBI structure number | 000000001009160 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the New York department of transportation.
Busiest bridges in St. Lawrence 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 |
All bridges nearby: St. Lawrence County, NY bridge conditions · every bridge in St. Lawrence County · New York bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.