Executive Order 11988, Floodplain Management (EO 11988), was issued by President Carter on May 24, 1977
The purpose of EO 11988 was to ensure that federal agencies:
- avoid, to the extent possible, the long and short term adverse impacts associated with the occupancy and modification of floodplains; and
- avoid the direct or indirect support of floodplain development whenever there is a practicable alternative.
Executive Order 11990, Protection of Wetlands (EO 11990), was also issued by President Carter on May 24, 2977
EO 11990 requires that agencies must, to the extent permitted by law, avoid undertaking or providing assistance for new construction located in wetlands unless the head of the agency finds:
- that there is no practicable alternative to such construction, and
- that the proposed action includes all practicable measures to minimize harm to wetlands which may result from such use.