U.S. Department of Transportation
Federal Highway Administration
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Washington, DC 20590

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Bridges & Structures



The FHWA 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 downloaded 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.

Links to software produced by others (HEC-RAS, WMS, and SMS) are also provided below.

FHWA Hydraulics Engineering Software
Application Software and Tools Date Contact
  • Culvert Hydraulic Analysis & Design
HY 8 Culvert Hydraulic Analysis Program

Companion Resource:
2016 Eric Brown
  • Aquatic Organism Passage (AOP) Design
HEC 26 Spreadsheet

Companion Resource:
2011 Bart Bergendahl
  • Bridge Scour Assessment and Summary
  • Riprap Analysis
  • Channel Lining Design
  • Rock / Sediment Gradation Analysis
  • Curb and Gutter / Inlet Analysis
  • Detention Basin Analysis
  • Rational Method Hydrologic Analysis
  • Channel and Weir Analysis
Hydraulic Toolbox

Companion Resources:
2014 Scott Hogan
  • Hydrologic Analysis (Rational method, Regression Equations, TR-55, TR-20, HEC-HMS)
  • Basin Delineation
  • Storm Drain Analysis & Pump Station Design (HY 12)
  • HEC-RAS Model Development
Watershed Modeling System (WMS)*

Companion Resources:
2016 Scott Hogan
  • Two-Dimensional Hydraulic Analysis
Surface-Water Modeling System (SMS)*

Companion Resources:
2016 Scott Hogan
  • One-Dimensional Hydraulic Analysis
Hydrologic Engineering Center’s River Analysis System (HEC-RAS)

Companion Resources:
2016 Scott Hogan
  • Climate Adaptation
Climate Change Adaptation Tools

2016 Mike Culp

* 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 (found under "Companion Resources" in the table above), for additional details and directions on downloading and registering these software programs.

PDF files can be viewed with the Acrobat® Reader®
Updated: 07/22/2016
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000