What is the most amount of snow on the ground at one time that you've ever seen?

For me, it's four feet of snow. We've had four feet of snow on the ground more than once during my lifetime here in Maine. And when we do have four feet of the white stuff, the snow banks are even higher. Hence, when you drive down the side roads around here when their's four feet of snow on the ground, you feel like you're driving through a tunnel!