Beavers are very impressive engineers, fact that they can build a structure out of mud and sticks that can hold back that much pressure is amazing.Its nice to see someone who actually takes care of beavers, and is not doing this on a whim. From the description, "I do not choose which dam to remove", "Dams are removed only in places where beavers cause damage" and "I personally like all animals, so beavers are fine too."It never ceases to amaze me how structurally sound these dams are. Beavers are amazing.