I had a fire ring manufactured for me like the ones in state parks and I want to follow the instructions in the diy fire pit video. My problem is management of the rain water that will accumulate in the fire pit. digging a hole in the center will almost put the top of the hole a ground water level. I understand the gravel and the other construction steps but how to manage the water from rain is a real issue. I know I can try to put some type of cover but that is a pain. I have thought about raising the pit and ring and place steel pipes to allow the water to drain around the edges of the fire pit. Can you advise me on this?