A couple of ideas on structure placed in deep water.
If you only have mostly deep water, you can make tall structure that comes within whatever distance you want of the surface. The deep part is not wasted as the fish will use it in the colder months when the pond is not stratified or all the time if aeriation is used.
Another option is add some floatation to the structure then anchor it at the proper depth using concrete blocks and appropriate rope length. Let it float up to the level you want it at.
Last edited by snrub; 01/05/17 11:10 AM.