Constructing the levee to the 50-year flood elevation would not result in a floodway violation under the National Flood Insurance Program. Any increase in levee height above this 50-year level would result in a flood way violation.
An Operations and Maintenance Plan, as a required provision, would need to address access and maintenance of the 200-foot corridor along the levee and provisions to be implemented for combating the impacts of ice jams along the Platte River. Balancing the competing interests of ice jam induced flooding and floodway rise, compliance with Executive Order 11988, and maintaining strict floodplain management behind the levee will be difficult. Consequently, the applicant should have prescribed actions that will be implemented to minimize these impacts and maintain the integrity and performance of the proposed levee.
It is imperative that local flood plain management coordination be accomplished prior to construction of the project, for the purpose of addressing any concerns of property owners on the Saunders County side of the Platte River, regarding project-induced flood hazards.
An Environmental Assessment (EA) must be prepared for this project by FEMA to meet the requirements of the National Environmental Policy Act (NEPA). The EA must result in a Finding of No Significant Impact (FONSI) prior to FEMA's release of funding for this project.