The software available at this site is in the public domain and is available for downloading as zipped files or self-extracting zipped files. This software may be copied and used without restriction.
By downloading the software, the user accepts responsibility for understanding the following conditions and limitations, and agrees to them:
- The FHWA does not provide user assistance or support for this software.
- The application of this software is the responsibility of the user. It is imperative that the responsible engineer understands the potential accuracy limitations of the program results, independently cross checks those results with other methods, and examines the reasonableness of the results with engineering knowledge and experience.
- There are no expressed or implied warranties.
Click on the software title to go to the software description and download area. Some manuals are in electronic format and available for downloading from this web site or the ISDDC web site.
The FHWA software and related publications listed below are available from McTrans or PC-TRANS. Links to software produced by others are provided below.
|HEC 26||HEC 26 Spreadsheet||2011|
|HY 8||Culvert Hydraulic Analysis Program||2015|
|Toolbox||FHWA Hydraulic Toolbox||2014|
|HEC-RAS tools||Instructions for extracting HEC-RAS cross sections from MicroStation (.pdf, 5 mb) 2013|
|SMS||Surface-Water Modeling System (SMS)*|
|WMS||Watershed Modeling System (WMS)*|
* Through an arrangement between FHWA and Aquaveo, free WMS and SMS licenses are provided to state DOT and FHWA employees. Please refer to the licensing instructions (.pdf, 0.7 mb) for additional details and directions on downloading and registering these software programs