US Army Corps of Engineers
Hydrologic Engineering Center

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Version 1.4.3 of the Flood Damage Reduction Analysis (HEC-FDA) software is now available. This version is an update to Versions 1.4.0, 1.4.1, and 1.4.2.

HEC-FDA 1.4.3 is a certified planning model. It is the USACE preferred version of the HEC-FDA software because it contains bug fixes and general enhancements to the program's usability that are lacking in HEC-FDA Versions 1.4.0, 1.4.1, and 1.4.2. For instance, a procedure has been developed to check the database for integrity each time a study is opened and repairs the database if necessary, and the number of standard probability coordinates have been increased as have the number of the number of coordinates in several input functions. Converting a study from Version 1.4.0, 1.4.1, or 1.4.2 to version 1.4.3 is simple, automated, and fast. While version 1.4.3 is the preferred version of HEC-FDA, versions 1.4.0, 1.4.1, and 1.4.2 are also certified for use in planning studies and can continue to be used - without special approval, wherever it is more practical or convenient. In most cases all three versions of the software produce nearly identical results. The one exception to this rule is a study that has an inventory that contains inconsistent SID reach-bank assignments. In this case, structures may be assigned to different damage reach in Version 1.4.2, 1.4.3, and 1.2.5a than they would be in Versions 1.4.0 and 1.4.1. You can always contact HEC if you have questions about converting your study.

For a more detailed description of the modifications/enhancements in Version 1.4.3 please refer to the HEC-FDA Version 1.4.3 Release Notes.