Here is our recent weekend new burrow building project. Our senior tortoise closely supervised us. 
http://youtu.be/kt3mN07wS5c
http://youtu.be/kt3mN07wS5c
Tom said:Pretty cool. I have a few questions.
Does he shred the inner foam insulation layer in there?
Does it stay dry inside during cold heavy winter rains?
Do you run a temperature probe in there to see how it does compared to the outside, both in summer and winter?
Welcome to the forum, thanks for sharing, and I LOVE the pic at the end of video entitled "Tuscon, AZ". Gorgeous. I spent some time in Tuscon a few yeas ago and LOVED it there.
byoh20 said:We prefer to keep the burrows wide and arms length deep in case we need to pull them out. Also we can always visually see them but learned to do so cautiously as last year a diamondback rattler moved into one of the burrows. SURPRISE !