HEC-1 has been developed for the U.S. Army Corps of Engineers.  However, software developed at the Hydrologic Engineering Center is made available to the public whenever appropriate. Use is not restricted and individuals outside of the Corps of Engineers may use the program without charge. HEC will not provide user assistance or support for this software to non-Corps users.   Downloading this software indicates full acceptance of your responsibility in the use of this program.Please see the Distribution Policy for more details. 

Program Files

(Single File Setup) HEC-1 Program, Version 4.1 (828KB)

  1. From a MS DOS Prompt or Windows GUI, run hec1pkgv4.1.exe.
  2. Extract all files to the default folder (C:\HEC-1 Installation) or in the Hard Drive of your choice (e.g., C:\HEC-1 Installation,D:\HEC-1 Installation,E:\HEC-1 Installation).
  3. Once all files have been extracted, run INSTALL.bat through either the MS DOS Prompt or Windows GUI.
  4. At this point INSTALL will lead you through the installation of the HEC-1 package of programs.