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Nh 11B over Gunstock River

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

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

Nh 11B over Gunstock River in Belknap County, New Hampshire, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 1970, making it 55 years old at the 2025 inventory.
It carries about 3,736 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 65 of the 112 inventoried bridges in Belknap County rated good (58.0%); 5 (4.5%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

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