Ernie Schmidt wrote:The reason one would construct a steep sided water retaining pond is to prevent loss of water due to evaporation. Especially run off ponds that don't have a consistent source of water such as a stream or spring. Large gentle sloped shallow bodies of water/ponds dry up very quickly during drought conditions. Steep sided ponds with the least water surface exposed to the air hold water longer. When I had my run off pond built years ago, the dozer operator understood that principle and I ended up with a long pond about 8 feet deep in the middle that had steep sides and sloped at either end. Much like the one in the pictures. It really ended up being the best of both worlds holding water and having a sloped shore line. It does lose several feet of water during the summer, but fills quickly and stays filled during the rainy weather.