Home › New Hampshire › Belknap County › Brook Road over Salmon Brook

Brook Road over Salmon Brook

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

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

Brook Road over Salmon Brook in Belknap 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 substructure, rated 4 (poor condition) on the 0-9 scale.
It was built in 1900 and reconstructed in 2012, making it 125 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 5 of the 112 inventoried bridges in Belknap County rated poor (4.5%); 5 (4.5%) 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.

Component ratings

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

Bridge	Built	Vehicles/day	Condition
US 3 Nh 11 NH132 over I-93	2000	23,105	Good
US 3 Nh 11 NH132 over Gulf Brook	1936	23,105	Fair
I-93 SB over NH104 NH132	1963	19,812	Fair
NH106 Main St over Winnipesaukee River	1970	18,507	Fair
US 3 over Maple St Nhrr	1947	17,943	Good
US 3 Nh 11 over Winnisquam Lake	1973	16,322	Good