When deciding where to run trenches for electric to pumps I chose the uphill side of the pond so I could put a french drain in so as to help prevent any possible liner lift problems. I dont think this is necessary due to the amount of the pond that is above grade, but the trench was going to be dug anyway so I will make it do double duty.

Namely the pit that 2 mech filters sit in. I will fill the below grade space with rock and since its below the pond grade wise I hope the runoff will seep into the ground from here. You can also see the temporary elec. hook up for the ebara pump that will be the drain for my settling chamber. Next summer A gazebo/trellis will hide the settling chamber.

My buddy brian  helped out with the mortared (to be) submerged rock edge. This I hope will prolong the life of my liner and make a rock solid edge to the pond. This only took 2 days! Oh my knees! 

This will let me totally hide the liner very close to the water. The board is foamed pvc board like I used under my valves, but thinner. This is 1/4" thick so as to bend around the shape of the pond easily.

Tucking the liner down the back of the bender board. Tight fit a lot of places so I reused a piece of my concrete forms to push it all the way down. The bender board is resting on the same concrete as the rock and the liner is tucked 8 1/2" down the back. This will be filled on the rock side with concrete and then covered with flagstone.