Originally Posted By: Brettski
much depends...
Are you going to use a simple primary spillway pipe thru the top of the dam, or a more sophisticated siphon system? Once that is determined, you have some homework to do to calculate the correct sizing for either system.


It would be a simple through the dam pipe. I guess I would need another pipe to go under the driveway for the emergency spillway too. I'll be back with more info once I get the pond size and all the specs. Thanks