Snow Day Engineering - Building a Snow Cave

For my project I was with my friend Greg plowing and began brainstorming ideas for what to make.  As he was moving a compacted mound of snow I thought of how structurally that could save me some time.  After the storm cleared I found a lage snow bank and began Digging.  I made a cave about 4' deep with a height in front of about 2' and a tapered height in the back of about 1 foot.  The cave was about 4' wide in front and 3' in the back.