One of the issues I addressed to the structural engineer was the close proximity of the tower footing to the side of the pool. Luckily, our soil was of a composition that did not pose a problem. If you are placing your tower near a pool, you should consult with a qualified civil engineer because it is possible for the side of a pool to collapse into the excavation before the concrete is poured. Additionally, the engineer will be able to assess if your soil composition is such that shoring of the hole will be necessary to prevent its collapse. This is a very important safety issue. Your life could depend on it!