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Nh 28 Bypass over Lake Massabesic

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

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

Nh 28 Bypass over Lake Massabesic in Rockingham 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 2001, making it 24 years old at the 2025 inventory.
It carries about 7,177 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 200 of the 309 inventoried bridges in Rockingham County rated good (64.7%); 22 (7.1%) 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 47 ft
Location	2.0 Mi Jct Rt 121
NBI structure number	001300700010200
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-95 over Access Road	1950	86,429	Fair
I-95 over Maplewood Avenue	1970	76,465	Fair
I-95 over Preble Way CSX	1971	74,766	Fair
I-95 over Piscataqua River	1971	74,766	Fair
I-95 over Market Street	1970	70,573	Good
US 4 Nh 16 Sp Tpk over Shawayttuck	1983	68,236	Good