That's pretty simple, Jim.
We removed the course from the active list because either the race contact (preferably), the measurer, or the certifier told us it could no longer be used. The only other case that comes immeidately to mind would be that of a failed verification, and that would also be easy to explain.
Do we need to be able to tell anyone who inquires it was because they rerouted the bike path or added a turn lane at 3rd and Walnut? I don't think so.