拉皮丹水电站, 大坝险情, 漫顶, 极端暴雨

On the morning of June 24, 2024, the Rapidan dam, located in south-central Minnesota, faced the risk of collapse due to days of abnormal rainfall. This led to the emergency evacuation of residents living in low-lying areas of the Minnesota river valley. In the end, apart from severe erosion of the left abutment, the main structure of the dam remained intact. This article introduces the overview of the Lapidan dam project, the course of events, and the impact of the incident, and investigates the causes of the emergency by review of publicly available information. The main factors contributing to the emergency situation are believed to include the poor quality of equipment and facilities, extreme rainstorms and floods, and the inadequate flood control capacity of reservoirs. Further, the hazards of each risk factor are analyzed to prevent similar incidents.