Or it'd go the same way it does for just about every person doing something on own their land. It might involve a permit but would most likely would not involve the supreme court and everybody would be just fine as evidenced by the huge number of people who have already built things on their land/water and the vast majority of people would be better off for it and grateful that there's some kind of oversight to make sure that people aren't doing something that will fuck up the things we all use/depend on.
Even if someone is lucky enough to own land with a river running through it I'm pretty glad that somebody will "get in a man's way" if that man decides to do something like dump heavy metals into the river with abandon or dam it up without any consideration for those further downstream. I'm also glad that the somebody doing the job is ultimately working for the public and that voters who can decide to increase/decrease the amount of oversight as needed. The majority of the US population feels that the government isn't doing enough to protect the environment.
Even if someone is lucky enough to own land with a river running through it I'm pretty glad that somebody will "get in a man's way" if that man decides to do something like dump heavy metals into the river with abandon or dam it up without any consideration for those further downstream. I'm also glad that the somebody doing the job is ultimately working for the public and that voters who can decide to increase/decrease the amount of oversight as needed. The majority of the US population feels that the government isn't doing enough to protect the environment.