I'm teaching a live remote InRoads Drainage class next week, June 4-6.
If you're in an InRoads shop and it rains on your projects, InRoads Drainage should be how you're doing your drainage modeling and design.
Its tight integration with InRoads should make it, at the very least, your drafting solution and front end to your hydraulic engine (frankly, regardless of your client's requirements, it's easier to tweak the hydraulic output as necessary at the end than it is to gather and convert geospatial and hydrologic information from InRoads to an external number cruncher). InRoads Drainage exports to StormCAD (the numbers are practically identical, so I do my design with InRoads then export at the end rather than work outside of the InRoads environment).
Learning Paths:
The Learning Path for the full 3-day course is DrainageDesign Learning Path > Drainage Fundamentals using InRoads > Live (pick the SELECTseries 2 class).
I've put together a 1-day "Display and Evaluate" OnDemand course that is focuses on Display and Evaluation of InRoads Drainage Data. "Someone gives you an .sdb file, what can you do with it?" The next step is Structure Layout and Editing, about 4-hours of exercises. Hydraulics and hydraulic theory is excluded (for later courses). Learning Path for those modules is: http://learn.bentley.com/app/Public/ViewLearningPathWithMasterCourseExpanded?lpId=102294&mcId=100089&CourseId=0&moduleId=106782
If you have questions about InRoads Drainage, feel free to ask me.
-jeff martin