SSJSayajin, the fish are the lesser of 2 evils here.
As for your blow-out, I've been through this and I'm going to be brutally honest here because I don't want you having to come back and fix this next year... The top needs scrapped off near level to the deepest part of washout-then- another core needs to be made and superior (read good clay) needs to be built back up and compacted in thinner layers at the proper moisture content. When that freeboard is reached, it should be nothing less than 12' wide on top, then sand, gravel and riprap need to be placed on face, grass and erosion mats need to be used a couple of feet above water line-over and down back side.
Your picture looks like there was a weaker vain of material in that berm, I see no indication of proper, layered compaction-also doesn't appear wide enough to me, for the height of berm.
Where are you in Ks?
