US Army Corps of Engineers
Hydrologic Engineering Center

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HEC-ResSim 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.

HEC-ResSim 3.1:

The setup packages include HEC-ResSim 3.1, Documentation, and Example Watersheds.

Download HEC-ResSim 3.1 Setup Package (67.9 MB)
Download HEC-ResSim 3.1 64-bit Setup Package (64.7 MB)

If you're using a 64-bit version of Windows with more than 4GB of RAM it's recommended that you use the 64-bit version of HEC-ResSim. It allows HEC-ResSim to use more RAM which can improve compute times and data visualization performance.

Supported Operating Systems:
Windows XP, Vista, 7, 8, and 8.1 both 32-bit and 64-bit

Archived Versions:
Download HEC-HEC-ResSim 3.0a
Download HEC-HEC-ResSim 2.0