Okay, the first thing to do is clear the surface of the top soil and any vegetation. That is best accomplished, I believe by long pushes, moving the material to the side for later use. Then you dig the core and pack the dam. Yes, constantly running the dozer tracks back and forth over the dam to compact the soil as you go....only adding a couple of inches and then compacting and adding soil and compacting...make sure the clay has some mositure in it to help packing.
Good clay is required at the site...without it, you will spend possibly a lot of money and still have a leaking pond. Hope this helps.
