Hello All

First, Thanks to all who responded to my question on the outfall elevation. Things are running smoothly now.

The SWMM manual states the no conduit should have an invert above the crowns of all other pipes.

I am modeling a system with several drop structures, and bypasses where this is the case.

The manual states the these are not fatal, but depending on the critical/subcritical decisions made by Subroutine HEAD in the assignment of the junction areas, they may cause instabilities and continuity errors.

What is the lists' experience with this situation? Is it better to break the model into sections at nodes where this occurs?

It does not appear to be a problem, but I am only running dry weather flows at this time.

Thanks
Todd Williams
Parsons Engineering Science