The state of water is always changing. You have to work around waves, freeze/thaw cycles, flash flooding, tidal fluctuations and more. That is why you need a retaining wall that will hold up through all of these conditions, and you need to make sure the project gets built with the product you specify. Redi-Rock announces the American Society for Testing and Material standard specification C1776-17 for large wet-cast retaining wall blocks. Use this standard when specifying the large block product you want to use, and guarantee the project is built just the way you want.