Scott & Dobber,
I completed this installation on my 5-acre pond using two 8 inch pipe systems side-by-side. Since my pond filled last Sept, this system has handled all rainfall & watershed totally - the emergency spillway has never had water cross it yet
- and there have been several storms where water was pouring through these pipes big time!
Unfortunately I don't have any pictures I can post. I've yet to try the manual siphon function to see if it does drain the pond down on demand. I'm fairly sure that will work as well.
I did a lot of research before construction, & must admit, for the money, this is the best spillway system I found. By drawing out the bottom (dead) water instead of the top water, it is healthier for the pond & keeps your fertilization in the pond instead of going out over the spillway. I would recommend installing this system (as shown in the diagram) highly.
Best of luck!
