Howdy ya'll. Im in the process of designing my dock and I've seen a few different ways to drive in the piers. The first was to drive in a 12 inch pvc pipe into the water, pump out the water, then auger or post hole the dirt away. Drop in a 6x6 and concrete to let it set. And build off of that. The second method was to use a strong water pump to jet the dirt and clay away from the bottom of the 6x6 to allow it to drop into the pond bottom several feet and be done with it.
The bottom is really tough clay so I was wondering which method ya'll have used before. I admit I much prefer option 2 versus 1 for the work and materials involved. Thanks