Saw the following in Mark Tomlonson’s list of important dates in New York Central history.
“September 11, 1952 The last New York Central steam-powered commuter train leaves White Plains for Dover (NY), marking the end of steam on all NYC Divisions feeding New York City. (Some sources say September 13.)”
Actually, Dover Plains, not Dover.
We already covered the last steam in New York State:
https://penneyandkc.wordpress.com/last-steam-on-ny-central-lines-east/. But that was a milk train (empties) from Harmon to Utica.