Dams

The Dams dataset is a representation of the National Inventory of Dams (NID), maintained and published by the U.S. Army Corps of Engineers, in cooperation with the Association of State Dam Safety Officials, the states, territories, and federal agencies. It is also part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics (BTS) National Transportation Atlas Database (NTAD). The Dams dataset (NID) includes all known dams of the United States and its territories, that meet the federal definition of a dam. Dams where downstream flooding would likely result in loss of human life (high hazard potential). Dams where downstream flooding would likely result in disruption of access to critical facilities, damage to public and private facilities, and require difficult mitigation efforts (significant hazard potential). Dams that meet minimum height and reservoir size requirements, even though they do not pose the same level of life or economic risk as those above - these low hazard potential dams equal or exceed 25 feet in height and exceed 15 acre-feet in storage, or equal or exceed 50 acre-feet storage and exceed 6 feet in height. The database contains more than 70 data fields for each dam. This includes the dam's location, size, purpose, type, last inspection, and regulatory facts. The information is updated periodically by the state and federal agencies, reflected by the "Data Last Updated Date". For more information on dams, visit the NID web site at https://nid.sec.usace.army.mil/#. A data dictionary, or other source of attribute information, is accessible at https://doi.org/10.21949/1529016本大坝数据集即国家大坝清单（National Inventory of Dams, NID），由美国陆军工程兵团（U.S. Army Corps of Engineers）联合州大坝安全官员协会、各州、领地及联邦机构维护并发布，同时隶属于美国运输部（U.S. Department of Transportation, USDOT）下属运输统计局（Bureau of Transportation Statistics, BTS）的国家交通地图集数据库（National Transportation Atlas Database, NTAD）。该数据集收录美国及所辖领地内所有符合联邦大坝定义的已知大坝，具体收录条件包括三类：一是下游洪水可能造成人员伤亡的大坝（高风险潜力）；二是下游洪水可能导致关键设施通行中断、公私设施受损且需开展复杂减灾工作的大坝（显著风险潜力）；三是满足最低高度与库容要求的大坝——尽管其生命与经济风险等级不及前述两类，这类低风险潜力大坝需满足：高度不低于25英尺且库容超过15英亩-英尺，或库容不低于50英亩-英尺且高度超过6英尺。该数据库为每座大坝收录70余项数据字段，涵盖大坝的位置、规模、用途、类型、末次巡检情况及监管相关信息。此类信息由各州与联邦机构定期更新，更新情况可通过"Data Last Updated Date"字段体现。如需了解更多大坝相关信息，请访问国家大坝清单官网：https://nid.sec.usace.army.mil/#。数据字典或其他属性信息来源可通过https://doi.org/10.21949/1529016 获取。