In Iceland there are plans about to be licensed to build a huge hydropower dam in Thörsa River. This river is the home of the largest stock of wild Atlantic Salmon in Iceland and probably in the world. This dam would definitely have a disastrous effect on this unique Salmon stock.
Here's a press release on what's Happening:

https://www.icelandreview.com/de/natur-und-reisen-de/hvammsvirkjun-naturschuetzer-melden-efta-gesetzeswidrigen-kraftwerksbau/