Notes from my Oberengadin 2009 holiday:

• Samedan is a good deal less exciting than it used to be: passenger trains don’t do much shunting any more, and in normal service only the first island platform is used (tracks 2 and 3). 
• Track 1 is only used as a through line for shunting.
• Track 2 is used by Chur-St Moritz services (re1) in both directions, and track 3 by Scuol-Pontresina services (R7) in both directions. 
• Track 4 is used for the through Bernina Express and for various morning and evening trains that start/end at Samedan. 
• There is shunting of wagons going on in the yard practically all day, with at least four pairs of goods trains a day over the Albula line.