Currently When importing pulling in pipe networks (both utility and drainage) two things happen 1.) They lose a lot of data. 2.) you can only do it once. Then you have to erase EVERYTHING and do it again. The workflow generally goes like this: So ...

Most state are or are moving to using NOAA rainfall Data. Basic IDF tables can be Downloaded and Uploaded, but it should integrate with the different Calculation methods (Table equations, Poly Log, IDF Curve.....)

The class of a pipe is primarily selected by the depth of cover over a pipe. Sometimes vehicle loads or construction loads have an influence on the class selection