Remember when Gnomey decided he wanted a door? If not, take a quick look here. When I agreed to add the door I had no idea how deep that "bark" went. When I was done digging my way through that bark (tinfoil) I realized it went so deep I could add a bonus room!
Give me a hand Gnomey and hold the other end of the ruler please.... wow, 5.5 inches across! That's plenty space for a mud room. What do you think Gnomey? We can put in a stove. Put up hooks for your wet clothes to dry on.. maybe some storage space for your fishing