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Jefferson Notch Rd over Clay Brook

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

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

Jefferson Notch Rd over Clay Brook in Coos 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 superstructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1973, making it 52 years old at the 2025 inventory.
It carries about 96 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 86 of the 189 inventoried bridges in Coos County rated fair (45.5%); 10 (5.3%) 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


Structure	Steel stringer or multi-beam girder
Length	about 27 ft
Location	4.7 Mi Rt 302
NBI structure number	005551010019600
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US 2 Nh 16 over Moose River	1939	10,406	Good
Nh 16 over Moose Brook	1972	10,237	Fair
US 3 NH116 NH142 over Johns River	1938	9,718	Fair
US 2 US 3 over Israel River	1990	9,175	Good
US 3 over Upper Ammonoosuc River	1995	5,412	Good
US 2 over Recreational Trail	1960	5,195	Good