Also there are lots of people who has houses there that are very rich from St Louis and such that just visit during summer.
That is a good point. What if the people are compensated for whatever market value was before the issue came up, and then a future FERC panel ‘revisits’ the necessity of keeping the shoreline undeveloped ? You can be sure some resort will pick up the property once it is back to a single owner to deal with.
The dam operator might make a fortune. If FERC doesn’t change its ruling and insists the land be cleared, the property owners should sue for rights to the difference in value if the property is allowed to be sold within 20 years.