| filename extensions | art-335 |
| hce | |
| TechTarget file types | art-336 | HCE-HydroCAD-Hydrograph-Data-File |
| TechTarget file types | art-336 | HCE-HydroCAD-Stormwater-Modeling-System-Hydrograph-File-HydroCAD-Software-Solutions-LLC |
| English | eng-000 | HydroCAD Hydrograph Data File |
| English | eng-000 | HydroCAD Stormwater Modeling System Hydrograph File |