At least 75% of the structure in our ponds are put in after the pond is full. Not a problem. We do it from a boat or wade in and place the structure. Also can use an A frame ladder in deeper water. There are lots of methods. SMB beds are easy even in a full pond. Here are a couple links. The archive on SMB beds http://www.pondboss.com/forums/ubbthreads.php?ubb=showflat&Number=92626#Post92626