Home › New Hampshire › Grafton County › North Groton Road over Cockermouth River

North Groton Road over Cockermouth River

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

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

North Groton Road over Cockermouth River in Grafton 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 substructure, rated 7 (good condition) on the 0-9 scale.
It was built in 1930 and reconstructed in 1997, making it 95 years old at the 2025 inventory.
It carries about 173 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 262 of the 547 inventoried bridges in Grafton County rated good (47.9%); 43 (7.9%) 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


Structure	Prestressed concrete multiple box beam
Length	about 68 ft
Location	0.5 Mi From Hebron Tl
NBI structure number	010501640006600
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
I-89 NB over Plaza Connector Road	2012	28,690	Fair
I-89 Nh 10 over Brook Atv Trail	1959	25,062	Fair
I-89 Nh 10 NB over Truck Road Mascoma River	1966	23,084	Fair
I-89 NB over US 4 Nh 10	1966	22,727	Good
I-89 NB over Connecticut River Necrr	1966	22,288	Poor
I-89 Nh 10 SB over US 4	1966	21,937	Good