I just got my pond complete it's about 13 foot deep and was cut into a slow running stream. It is always full and I just got my 12 inch drainpipe in. Now the problem I'm having is, I am getting more water running over my emergency overflow than in the drain pipe that is still under construction. My question is, should I put a larger pipe for my emergency overflow because now it's just running over the shallow side of th my question is, should I put a larger pipe for my emergency overflow because e dam. i'm thinking if I put a larger pipe at that corner of the dam and covered it up that could be my emergency overflow .