Couldn't do all of it with the Back Hoe

After digging the majority of the pond excavation with the back hoe, the real work begins.  Here I am digging a trench in the bottom of the pond to lay the bottom drain piping in.  Notice the piping angling down into the hole from the deck area.  They head from the pond to the pump room that is off picture to the left.  After digging that little bit of earth to place the pipe, I was really happy that we had rented the back hoe to dig the large part...Do you think the pond will be deep enough?:)