Here's my .02. First, GREAT looking dam and super esthetics. With springs in your pond that continually feed water, be aware that too much water can put pressure on these springs and have a reverse effect - they may force a "back flow" and take water from your pond. I've seen this once and heard about it many times. Just a word of caution. The experts on this site can give you a more creditable evaluation on springs in the pond. Looks great and looks like you have a lot of "good help". JJ