From a copy of a hand written document titled: "Rail Available through Single Tracking Projects" dated 12/31/67 created by a "R.F.G." who, I was told, was the Valution Engineer of the B&M at the time, see below. Dates noted are "Date of Completion". Don't know exactly what that means in relation to when the rail was removed, track removed from service, etc. so take them for what they are worth.
Rollinsford, N.H. to No. Berwick, Me. (8.0 miles) 12-23-59
No. Berwick East to Kennebunk, Me. (10.7 miles) 3-16-60
Dover, N.H. (0.8 miles) 11-17-60
Grand Beach - Rigby, Me. (5.7 miles) 9-5-61
Kennebunk to Biddeford, Me. (7.5 miles) 6-19-64
Rockingham, N.H. to Dover, N.H. (11.3 miles) 5-24-66
Biddeford to Grand Beach, Me. (3.0 miles) 11-17-67
Removals after 12-31-67 are, obviously, not shown.