Home › New Hampshire › Carroll County › Mill Street over Conway Lake Outlet

Mill Street over Conway Lake Outlet

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

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

Mill Street over Conway Lake Outlet in Carroll 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 1940 and reconstructed in 1994, making it 85 years old at the 2025 inventory.
It carries about 1,629 vehicles a day (traffic count year 2023).
Its listed owner is a city or municipal highway agency.
It is one of 102 of the 193 inventoried bridges in Carroll County rated good (52.8%); 10 (5.2%) 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 43 ft
Location	0.8 Mi Fr US Rte 302
NBI structure number	005401660013100
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
Nh 16 NH113 over Pequawket Pond	1940	19,487	Fair
US302 Nh 16 over Artist Falls Brook	1900	13,702	Good
US302 over Saco River	1972	13,313	Fair
Nh 16 over Branch River	1966	12,893	Fair
Nh 16 over Saco River	1945	12,188	Fair
Nh 16 Nh 25 over Chocorua River	1955	11,700	Good