District flood control systems are precautionary systems implemented in areas that are historically prone to flooding. The risk of flooding is not isolated to coastal populations, floods can result from heavy storms, excessive upstream river water flows, and winter ice and snow melts. Control systems are put in place to collect and manage excess waters to protect populated areas from damaging flood waters. Flood systems vary widely by the risk level and potential water influx. Flood control systems may include dams, diversion channels, and overflow reservoirs.