Thanks a bunch guys, these are all great tips, its going to be costly to rip-rap the whole length of the dam, about 650' but may have to, as an excavating contractor myself, I have fixed a few pond dams that had extensive muskrat damage, had a client last summer that we repaired his emergency spillway, it had washed out and lowered his water level by about 5 ft and been left that way for many years, after we fixed it and brought the water level back to original we discovered, after the first rain that muskrats had poked the dam full of holes at the lower elevation, drained it right back down swiftly, we had to completely rework the top 6 ft of the dam, I know the connebear trick but was hoping to avoid the problem before it started, Thanks again guys for the input.
