Release Notes Description of the changes that occurred at each new release including bug repairs, new capabilities, and changes in operation.
Version 4.11, July 2023
Version 4.10, July 2022
Version 4.9, January 2022
Version 4.8, April 2021
Version 4.7, December 2020
Version 4.6.1, September 2020
Version 4.6, August 2020
Version 4.5, June 2020
Version 4.4.1, May 2020
Version 4.4, April 2020
Version 4.3, September 2018
Version 4.2.1, March 2017
Version 4.2, August 2016
Version 4.1, July 2015
Version 4.0, December 2013
Version 3.5, August 2010
Version 3.4, August 2009
Version 3.3, September 2008
Version 3.2, April 2008
Version 3.1.0, November 2006
Version 3.0.1, April 2006
Version 3.0.0, December 2005
Version 2.2.2, May 2003
Version 2.2.1, October 2002
Version 2.2.0, August 2002
Version 2.1.3, October 2001
Version 2.1.2, June 2001
Version 2.1.1, February 2001
User's Manual (CPD-74A) Description of the use and application of the program.
Version 4.11, July 2023
Version 4.10, July 2022
Version 4.9, January 2022
Version 4.8, April 2021
Version 4.7, December 2020
Version 4.6.1, September 2020
Version 4.6, August 2020
Version 4.5, June 2020
Version 4.4, April 2020
Version 4.3, September 2018
Version 4.2, August 2016
Version 4.1, July 2015
Version 4.0, December 2013
Version 3.5, August 2010
Version 3.4, August 2009
Version 3.3, September 2008
Version 3.2, April 2008
Version 3.1.0, November 2006
Version 3.0.1, April 2006
Version 3.0.0, December 2005
Version 2.1.0, January 2001
Technical Reference Manual (CPD-74B) Discussion of the technical underpinnings of the program including theoretical basis, parameter estimation techniques, and application suggestions.
Applications Guide (CPD-74C) Illustrates application of the program to studies typical of those undertaken by Corps’ offices.
Validation Guide Description of the validation testing procedures used to determine that the software is operating correctly during a numerical simulation. The project files used for testing are also available in a data kit.
Version 4.10, July 2022
Download Data Kit (1.1 GB)
Version 4.9, Jan 2022
Download Data Kit (1.00 GB)
Version 4.8, April 2021
Download Data Kit (1.00 GB)
Version 4.7.1, January 2021
Download Data Kit (938 MB)
Version 4.7, December 2020
Download Data Kit (938 MB)
Version 4.6, August 2020
Download Data Kit (2.88 GB)
Version 4.5, June 2020
Download Data Kit (2.67 GB)
Version 4.4, April 2020
Download Data Kit (2.81 GB)
Version 4.3, September 2018
Download Data Kit (1.54 GB)
Version 4.2, August 2016
Download Data Kit (1.11 GB)
Version 4.1, July 2015
Download Data Kit (1.13 GB)
Version 4.0, December 2013
Download Data Kit (566 MB)
Version 3.5, August 2010
Download Data Kit (242 MB)
Version 3.4, August 2009
Download Data Kit (242 MB)
Additional Resources Other documents and reports related to the development or use of the program.
Recommended Citation for HEC-HMS Documentation
Hydrologic Engineering Center. <Document and Version>. <Page Title>. <Retrieval Date>, from <Website Url>
Example Citation for HEC-HMS Documentation
Hydrologic Engineering Center. HEC-HMS User’s Manual version 4.7.
Selecting a discretization method. Retrieved February 18, 2021, from https://www.hec.usace.army.mil/confluence/hmsdocs/hmsum/4.7/subbasin-elements/selecting-a-discretization-method