C3006 over Mill Brook
Windsor County, Vermont · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- C3006 over Mill Brook in Windsor County, Vermont, 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 1974, making it 51 years old at the 2025 inventory.
- It carries about 300 vehicles a day (traffic count year 2019).
- Its listed owner is a town or township highway agency.
- It is one of 241 of the 483 inventoried bridges in Windsor County rated fair (49.9%); 26 (5.4%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated September 2023, 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 → (43.46197, -72.41958)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 77 ft |
| Location | 0.55 Mi to Jct W VT44 |
| NBI structure number | 101423002514231 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | September 2023 |
| 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 Vermont department of transportation.
Busiest bridges in Windsor County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 00089 Ml over I 89 over Th No 78 | 1965 | 42,000 | Good |
| I 00091 Ml over I 91 over US 5 | 2015 | 31,000 | Good |
| I 00091 Ml over I 91 over US 5 | 2015 | 31,000 | Good |
| I 00089 Ml over I 89 over Th No 46 | 1967 | 26,000 | Good |
| I 00089 Ml over I 89 over US 5 | 1966 | 26,000 | Fair |
| I 00089 Ml over I 89 over US 5 | 1966 | 26,000 | Fair |
All bridges nearby: Windsor County, VT bridge conditions · every bridge in Windsor County · Vermont bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.