Byron, nice tie. I'm assuming it's a size 14 +/-? I would trim the bottom hackle so this fly rides right in the surface film as that is how the naturals look when dropping those eggs in the evening. I also use a more greenish (chartreuse) color for the egg sack, but the one you show looks pretty good. Let us know how it works. That is a killer opportunity for some great fish, especially tight up against the dam in that slack-water eddy. Good luck.

Kelly.