This is awesome. I was just listening to an NPR story about the area below the Khakova dam in Ukraine that has been re-flooded by the Dnipro river. The folks there seem pretty thankful for the river for military reasons, but also because the environment has been restored already to a state that it hasn't seen since the 60s. Plants and animals that have been gone for decades are already moving back in. It's glorious to see.