Nashua, Acton & Boston Railroad

Reporting mark: NA&B
NA&B - Joint Grass Brook Bridge (Middlesex County, Massachusetts)
Abandoned stone arch bridge over Joint Grass Brook on Nashua, Acton & Boston Railroad
Derelict/abandoned

NA&B - Salmon Brook Bridge (Middlesex County, Massachusetts)
Built 1872; RR abandoned 1925
Abandoned stone arch bridge over Salmon Brook on Nashua, Acton & Boston Railroad
Derelict/abandoned

NA&B - Stony Brook Bridge (Middlesex County, Massachusetts)
Built 1872; RR abandoned 1925; seems to be open as a trail
Stone arch bridge over Stony Brook on Hiking trail (former Nashua, Acton & Boston Railroad)
Open to pedestrians only