For the more information about water resources in the National Park Service, please visit http://www.nature.nps.gov/water/.


Executive Order 11988 Floodplain Management

The objective of Executive Order Floodplain Management is "...to avoid to the extent possible the long- and short-term adverse impacts associated with the occupancy and modification of floodplains and to avoid direct and indirect support of floodplain development wherever there is a practicable alternative." For non-repetitive actions, the E.O. states that all proposed facilities must be located outside the limits of the 100-year floodplain. If there were no practicable alternative to construction within the floodplain, adverse impacts would be minimized during the design of the project. National Park Service guidance pertaining to this E.O. can be found in Director's Order #77-2, Floodplain Management. It is National Park Service policy to recognize and manage for the preservation of floodplain values, minimize potentially hazardous conditions associated with flooding, and adhere to all federally mandated laws and regulations related to the management of activities in flood-prone areas. Particularly, it is the policy of the National Park Service to:

  • restore and preserve natural floodplain values;
  • avoid to the extent possible, the long- and short-term environmental impacts associated with the occupancy and modification of floodplains, and avoid direct and indirect support of floodplain development wherever there is a practicable alternative;
  • minimize risk to life and property by design or modification of actions in floodplains, utilizing non-structural methods when possible, where it is not otherwise practical to place structures and human activities outside of the floodplain; and,
  • require structures and facilities located in a floodplain to have a design consistent with the intent of the Standards and Criteria of the National Flood Insurance Program (44 CFR 60).

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Last Updated: March 02, 2012