So I got the siphon back going Friday before dark and by saturday morning it had dropped the pond level enough to stop the leak. Less than a foot from full if I had to guess. I made a call to a guy I grew up shooting trap with on a youth team that works for a local excavating company. He pretty much just does pond work for them now as they keep him busy either building or repairing ponds 90% of the time. Any how company owner came out Saturday morning while making his rounds to take a look at it and the problem is bigger than I had hoped. Turns out it is not a muskrat hole that got it. The ticking time bomb of the trees on my dam has finally went off. So pond is going down 4-5' and the dam is getting a makeover in the near future.

My pond renovation thread here