| The TR-55 computer model has been revised and
completely rewritten. As a windows based program, the input and editing windows
are a big improvement over the DOS version. The new WinTR-55 uses the WinTR-20
program as the driving engine for more accurate analysis of the hydrology of the
small watershed system being studied. A final version (including programs,
sample data, and documentation) is now complete. The NRCS WinTR-55 program can
be downloaded from this page. The WinTR55 development team has appreciated all
the testing and comments we have received to date. If you encounter any
problems, or have comments or enhancements on the version 1 program please
contact the WinTR-55 development team via e-mail to the
WinTR-55 Team.
Download WinTR-55
WinTR-55, Version 1.0.08 (9.8 MB -last updated 1/1/2005 - Zipped format)
WinTR-55 Support Materials
(These files require
Microsoft Word or
Adobe Acrobat.)
WinTR-55 Readme file (27kb)
WinTR-55 Frequently Asked Questions (23kb)
Latest version of the WinTR-55 Users Manual (2mb)
References on Time of Concentration with Respect to Sheet Flow (59kb)
WinTR-55 Time of Concentration (Tc) Document Hydrology Technical Note No. N4 (115kb)
NRCS Training Materials
(These files require
Microsoft Powerpoint.)
Download the WinTR-55 Tutorial (2.2 Mb)
Download the WinTR-55 Presentation for Experienced Users (445kb)
Assistance with the material on this page may be obtained from the WinTR-55 Support Team at
WinTR-55 team.
The Natural Resources Conservation Service used government
funds to develop the Technical Release 55 (WinTR-55) computer program. It may be
downloaded for use and copying at no additional expense or license requirements. |
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