@ceilingcat - I agree that injunctions are sometimes necessary. However, I think they are a sad testament to our legal system. It takes so long for anything to actually get done! If it didn't take that long for cases to be heard, injunctions wouldn't be necessary!
I do think, however, that it is a good thing that people who are "wronged" by an injunction can file an appeal. I think it's possible for courts to get things wrong, especially in civil cases. At least if you have an injunction wrongfully filed against you, there is something you can do.
Although I suppose in some cases, the damage has already been done. Like in the example given in the article. What if there was a specific, timely reason Hadley wanted to damn the river? If he appeals the injunction and wins, he's still lost valuable time.