| filename extensions | art-335 |
| hci | |
| TechTarget file types | art-336 | HCI-HydroCAD-IDF-Data-File |
| TechTarget file types | art-336 | HCI-HydroCAD-Stormwater-Modeling-System-IDF-File-HydroCAD-Software-Solutions-LLC |
| English | eng-000 | HydroCAD IDF Data File |
| English | eng-000 | HydroCAD Stormwater Modeling System IDF File |