FHWA Hydraulic Toolbox
US Federal Highway Administration (FHWA)
Download from the vendor
www.fhwa.dot.gov
The Federal Highway Administration’s Hydraulic Toolbox brings routine road drainage calculations into one program: Rational Method discharge, open channel flow and lining selection, weirs, curb and gutter sections, storm drain inlets, detention basins, pier and abutment scour, riprap design, sediment gradations and culvert assessment. All calculations are saved in one project file, several scenarios can be compared, and plots and reports are generated in US customary or SI units. Limitation: it runs only on 64-bit Windows, and its methods follow FHWA’s HEC manuals.
Ratings & Reviews
| Licence type | Completely Free |
|---|---|
| Licence terms | US government software, free to download and use. Downloading means accepting the terms: FHWA provides no user support, there is no warranty, and the engineer is responsible for checking the results. |
| Platforms | Windows |
| Engineering field | Civil Engineering, Environmental & Water, Transportation Engineering |
| Tool type | Hydrology & Drainage, Engineering Calculators |
| Vendor site | www.fhwa.dot.gov |
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Last verified: 2026-10-17
