Is that even what you call it? I'm not sure. I have a retaining wall (large granite stones in mortar) on the shorefront of a lake that freezes every winter. It is falling apart. It is still standing in most areas but has cracks and some of the rocks have fallen out. The yard (in one area) is sinking where the wall has come away from the land. Any suggestions on how to repair this thing or do I need to take it down and start from scratch? I know I need to check w/ DEP...

Thank you for any help you can offer.