dig the into the inside of the berm, use that dirt to build up the outside, and then use a shovel or a rake to smoothe out the berm. Then buy or make yourself a packer, and packit and wait a while then pack again. To make a packer get a small tree about a small fist around the length of a long handle shovel, and cut a small piece of ply wood and nail it onto the bottom of the tree. I'll try to get a picture of mine but it works great for me.