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Atlantic Hwy over ST. George River

Knox County, Maine · rated Fair in the 2025 National Bridge Inventory

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

Atlantic Hwy over ST. George River in Knox County, Maine, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1991, making it 34 years old at the 2025 inventory.
It carries about 8,570 vehicles a day (traffic count year 2016).
Its listed owner is the state highway agency.
It is one of 30 of the 54 inventoried bridges in Knox County rated fair (55.6%); 9 (16.7%) 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


Structure	Continuous steel stringer or multi-beam girder
Length	about 255 ft
Location	4 Mi. E. of Rte. 90
NBI structure number	2786
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Main St over Mill Creek	1924	16,917	Fair
Main St over Megunticook River	1931	11,473	Poor
Belfast Rd over Spring Brook	2025	6,960	Good
Heald Hwy over St George River	1960	6,940	Poor
Camden Rd over St George River	1961	5,596	Fair
Rockland Rd over Medomak River	1931	4,890	Fair