Otto built my pond about 2 years ago, last September the pond caught full. This past winter the North Winds have really eaten away at my dam (erosion). Has anyone on the forum ever used bags of sakrete in place of rock Rip Rap? I am in an area that does not have immediate access to alot of rock for Rip Rap. What are your thoughts on how high above the water line should I place the Rip Rap and how far below the water line?