I heard that too, but I had heard that it was only a temporary issue. That the Marina would open back up the following season with a few hundred less slips. I know thats not what you want to hear, and that it would be very disturbing to be displaced, but it may not be a permant issue.
I would recommend Michigan City, its not very far from Hammond, probably less than an hour car drive, and if you are a resident of Indiana the waiting list may not be too long. For residence of Indiana it is about (1) year. (Thats what I was told last season).
Further up the Michigan shoreline, I know that Eldean's in Holland just expanded. I think they have slips available. I don't know where you reside, so Holland might be a bit of a drive. It is however a wonderful location to sail out of.
One thing is for sure, you have to act quick. There are 900 of you that don't have a mooring for next year. I feel your pain, its not a good situation. I know you have spent a lot of money over the years and that the boating community has contributed large funds into the city...... and this is how you get treated? For a casino? I guess we know where the mayor's loyalties are, and it is not with the boaters.