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I-89 Nh 10 NB over Miller Pond Road

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

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

I-89 Nh 10 NB over Miller Pond Road in Sullivan 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 culvert, rated 5 (fair condition) on the 0-9 scale.
It was built in 1959, making it 66 years old at the 2025 inventory.
It carries about 10,804 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 79 of the 158 inventoried bridges in Sullivan County rated fair (50.0%); 9 (5.7%) 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

Component	Rating (2025)	FHWA scale meaning
Culvert	5	Fair condition

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

Bridge	Built	Vehicles/day	Condition
Nh 11 NH103 over Sugar River	1981	13,248	Fair
Nh 11 NH103 over Sugar River	1985	12,792	Good
I-89 Nh 10 SB over I-89 Ramp	1959	10,987	Fair
I-89 Nh 10 SB over Skinner Brook	1972	10,987	Fair
I-89 Nh 10 SB over Miller Pond Road	1972	10,987	Good
I-89 SB over Nh 10	1972	10,987	Fair