I bet it could support a great deal of weight. Right by my coffee shop one year the side of a creek collapsed, they built a huge retaining wall with exactly this kind of gravel. They would dump it in 10x8x8 wire crates and stack the crates on top of each other. The article said it was gneiss gravel, that stuff takes awhile to erode. It&#x27;s not like concrete at all, much much stronger.