All charts, queries and maps reflect the most current 2016 National Inventory of Dams (NID) database. State and federal dam regulators provided their data from August 2015 to January 2016 for inclusion in the 2016 database. Please be aware that inspection and EAP dates reflect 2015 data, so any inspections or updates since then will not be reflected in the current NID. Please contact the respective state or federal regulatory authority for the most up-to-date information.

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