The house we just bought had a goldfish pond in the back yard, which has been removed, leaving a hole roughly 1.5 meters squared, by 1 meter deep. I wish to fill in the hole, and plant a flower/vegetable garden over the current spot.
What is the ideal way to fill in this hole, to avoid sinkage, allow proper drainage, etc? I see this question, which is related, but somewhat narrower (focusing simply on whether filling with bricks is appropriate).
What's the proper way to fill in a large hole? What types of materials should I use at which depths, and how, if at all, should these layers be treated (should I tamp each layer as I add it? Add dirt and water to fill in the gaps, etc)?
I have already at my disposal some medium-sized rocks/bricks, as well as a large quantity of dirty landscaping gravel, which I can use as filling. I expect I'll need to buy some topsoil for the top layer. Should I also buy sand, or any other materials, for part of this project?