This doesn't sound terrible but it will have effects on the ecosystem similar to hydro at least - blocking fish migration paths, reducing river flow rate and po

This doesn't sound terrible but it will have effects on the ecosystem similar to hydro at least - blocking fish migration paths, reducing river flow rate and potentially causing algae blooms, fish die-offs or water toxicity increases as sediments are disturbed in fun new ways. All that said, it's certainly miles above either coal or natural gas.