Have instruction for retaining wall built from stackblock. Need adaption for use as seawall, correct way to keep stable from fluctuating water levels, to keep foundation intact and what to do on the lakebed side. Ditch dug, enough crusher run packed in ditch on top of heavy duty plastic fiber cloth. How much fiber should extend in front of wall and what to do with it? Any other suggestions regarding the foundation and front will be much appreciated.