SK Tower East End Selkirk Yard

What year did SK Tower close & where was the work sent to control the interlocking plant? I can document SK being open day and night 10/64 but by then SM was a CP. Where did all this work go; the TCS machine in Utica at the time only went as far east as CP-5 way up into 1970.

SK went to the St. Lawrence Dispatcher at Utica.

That Dispatcher controlled the east end of the HRCRR, Hudson Line from Rensselaer south to CP-75, and the Port of Albany Branch.

When did the diamond there disappear?

Historic Aerials has a 1952 view. Looks like it was gone then.

Pretty sure that the diamonds were removed after the discontinuance of Weehawken - Albany passenger service c. 1959.