StormCAD provides comprehensive modeling for the design and analysis of storm sewer systems using a peak flow (Rational Method) approach. StormCAD provides calculations for catchment runoff, gutters, inlets, conduit networks, and outfalls; and its intuitive interface makes the design and analysis of storm sewer systems simple. Available for MicroStation, PowerCivil for North America, AutoCAD, or stand-alone, StormCAD includes automated constraint-based design (to size pipes and determine invert elevations); scenario and data management; and reporting capabilities. Regardless of the platform used, StormCAD maintains a single set of modeling files for true interoperability. StormCAD is completely customizable using WaterObjects.NET.