Greenfield Parkway over Riddle Brook
Hillsborough County, New Hampshire · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Greenfield Parkway over Riddle Brook in Hillsborough County, New Hampshire, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- It was built in 2000, making it 25 years old at the 2025 inventory.
- It carries about 571 vehicles a day (traffic count year 2023).
- Its listed owner is a city or municipal highway agency.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (42.90695, -71.50278)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 0 | Failed condition, out of service |
Bridge details
| Structure | Steel culvert |
| Length | about 25 ft |
| Location | .1 West of Liberty Hill R |
| NBI structure number | 001901570006800 |
Source: FHWA National Bridge Inventory, 2025 data as reported by the New Hampshire department of transportation.
All bridges nearby: Hillsborough County, NH bridge conditions · New Hampshire bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.