Jadog, don't know if this will help; it was my southern engineering , has worked so far. built the berm out of 6"-8" rock , came up to
within 18" of surface, covered the berm with heaviest pond liner my contractor could provide. Came out on east edge of beach with
berm to main berm, went west the width of the beach, left west end open for good water circulation, prevent stagnation.
Around 3 sides of the beach, above water , dry sides of beach, we used the new PVC , "Push in" pilings, used a large Excavator
to push the PVC pilings into the ground creating a water tight low wall around the beach to prevent water erosion from upper grass Lawn. Hope my description makes sense, With the Pond liner over the berm rock. no stubbed toe complaints, so far.
The Pond liner, on pond side of berm, we piled some more 6-8" rock to hold liner in place. For what it's worth, hope it helps.
BG love it, always nests all over the sand , in about 8-12" of water.
