Levee certification is a technical finding for floodplain mapping purposes as part of the National Flood Insurance Program, that concludes there is reasonable certainty that the levee protecting the area will contain the base (1% annual chance exceedance, sometimes referred to as the 100-year) regulatory flood. The certification finding must be accomplished by either a registered professional engineer or a federal agency with levee design and construction qualifications such as the Corps.
Responsibility for seeking levee certification belongs to the local agency with jurisdiction over the floodplain in question. The local agency may perform the certification analysis with staff or consultants, or may request such technical determination by others. The Federal Emergency Management Agency does not certify levees; instead, FEMA is the recipient of levee certification determination documentation forwarded by the local agency. If levee certification documentation is found to be in order, FEMA has the authority to accredit the levee and the associated flood insurance rate maps depicting flood hazard will show the floodplain areas as protected from the base (regulatory) flood.