I *nearly* got stuck in a snowbank that was literally higher than the bottom of the windows of my car. I just kept plowing and plowing and plowing and got out....I was originally trying to break through the super deep stuff to get to the 24" deep powder that was untouched in a big center section of this lot.
Then we found some not-so-deep stuff, probably 14" deep, with 24" deep bank at the edge, depending on where you went in.