Granite Road over South River

Carroll County, New Hampshire · rated Poor in the 2025 National Bridge Inventory

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

• Granite Road over South River in Carroll County, New Hampshire, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
• Its lowest-rated component is the superstructure, rated 2 (critical condition) on the 0-9 scale.
• It was built in 1920 and reconstructed in 1950, making it 105 years old at the 2025 inventory.
• It carries about 96 vehicles a day (traffic count year 2023).
• Its listed owner is a city or municipal highway agency.
• It is one of 10 of the 193 inventoried bridges in Carroll County rated poor (5.2%); 10 (5.2%) are rated poor.
• 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 → (43.72016, -71.00241)

Component ratings

Bridge details

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

Busiest bridges in Carroll County

All bridges nearby: Carroll County, NH bridge conditions · every bridge in Carroll County · New Hampshire bridges.

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