Pond Boss Forums POND CONSTRUCTION Building a dam Building a 10 - 12 acre lake

I now have a bunch of pipe and such to drain down the lake so can make some changes next summer. One of the changes I'm considering is putting rip rap on my dam as I'm getting some wave action on my dam and a few other areas.

Any suggestions if I should put some type of matting underneath it or of best way to prevent rip rap from going too far down the dam (dam is at a 4:1 slope)?

Thanks!