Easy..
Find the lowest spot to go over, and run your machine at the snow perpendicular to the face of the snow... no need to get any speed up, this will not help.
You will spin, but you will make a ramp with the ejected snow, for next time.
You will not get stuck, as you can always back out with the help of gravity.
I have done this many times with a Snow Trac. It may take a bit as the snow is being moved behind the machine by the tracks. You will eventually see the nose of your cat start to fall as you spin. In a few more moments your nose will fall right down as the machine pitches over on top of the pile...
My machine has 15" of ground clearance. Hopefully you Imp has enough. You can always back out of it..
Regards, Kirk