We are looking to build a small pond (9'x18'x6'), but we want the edge to be raised up about 8". I am thinking about using CMUs (Concrete Masonry Units) which are 8x8x16. The entire pond will be lined with an EPDM pond liner.
My question is that since some of the water will be pushing up next to the blocks, how do I figure out to engineer this so that the blocks don't push out?
- Concrete footing?
- Rebar in some of the blocks?
- Rebar in all of the blocks?
- Fill the openings of each block with concrete?
So, I have a pretty good idea of how to over engineer this, but I don't want to waste time and money though either.
If you don't have any concrete answers, but if you know where I can find this information, that would be great too.