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Crystal Lake Road over Suncook River

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

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

Crystal Lake Road over Suncook River in Belknap County, New Hampshire, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
It was built in 1929, making it 96 years old at the 2025 inventory.
It carries about 1,261 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 42 of the 112 inventoried bridges in Belknap County rated fair (37.5%); 5 (4.5%) are rated poor.
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.

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