I saw a chart a while back that compared the flow of a conventional standpipe system to a siphon. If I recall, a 12" siphon would do as much or more than a 36" standpipe. I don't remember where I saw this chart. Can anyone help?

My watershed is about 320 acres, so I am thinking about two 12" siphons. Any suggestions on this?

Thanks.

Hey Moe, I'm trying to think but nuthin's happening!