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Flat Rock Bridge R over Salmon Falls River

York County, Maine · rated Good in the 2025 National Bridge Inventory

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

Flat Rock Bridge R over Salmon Falls River in York County, Maine, 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 1984, making it 41 years old at the 2025 inventory.
It carries about 1,050 vehicles a day (traffic count year 2016).
Its listed owner is the state highway agency.
It is one of 77 of the 236 inventoried bridges in York County rated good (32.6%); 22 (9.3%) 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	Steel stringer or multi-beam girder
Length	about 87 ft
Location	0.4 Mi SW River Rd
NBI structure number	1221
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
I 95 over Eliot Rd	1972	41,190	Fair
I-95 over Dennett Road	1971	40,420	Fair
I 95 over Piscataqua River Rte 103	1971	40,420	Fair
I-95(SB) over Saco River	1948	35,170	Fair
I-95 (NB) over Saco River	1947	34,410	Fair
I-95 SB & NB over Spruce Creek	1947	31,420	Fair