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Colby Siding Rd over Caribou Stream

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

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

Colby Siding Rd over Caribou Stream in Aroostook 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 6 (satisfactory condition) on the 0-9 scale.
It was built in 1980, making it 45 years old at the 2025 inventory.
It carries about 480 vehicles a day (traffic count year 2016).
Its listed owner is the state highway agency.
It is one of 162 of the 231 inventoried bridges in Aroostook County rated fair (70.1%); 27 (11.7%) 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

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

Bridge	Built	Vehicles/day	Condition
North St over Meduxnekeag River	1944	13,721	Poor
Main St over Aroostook River	1982	11,336	Fair
State St over Presque Isle Stream	1979	8,853	Fair
E Main St over Fish River	1953	8,100	Fair
Connector Rd over Presque Isle Stream	1978	7,860	Fair
Main St over Caribou Stream	1922	7,670	Fair