Policy for Use of Hydrologic Engineering Center-River Analysis System in the National Flood Insurance Program

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The Hydrologic Engineering Center of the U.S. Army Corps of Engineers developed the River Analysis System, HEC-RAS, to replace the HEC-2 hydraulic model. The memorandum titled "New Policy for the Use of HEC-RAS in the NFIP" addresses the policy for the use of HEC-RAS to replace HEC-2 models for flood hazard mapping efforts for the National Flood Insurance Program (NFIP).

The memorandum titled "HEC-RAS Version Update" addresses the decision making process that FEMA contractors and mapping partners should apply to flood map revision requests involving HEC-RAS.

To view or download the Policy for the Use of HEC-RAS in the National flood Insurance Program (Apr 2001), click here.

To view or download the HEC-RAS Version Update, click here.

The resources above and other useful FEMA, NFIP, and Flood Map Modernization resources are now located in the FEMA Library. To search for resources in the FEMA Library, click here.

Last Updated: 
04/08/2014 - 16:52
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