A significant irrigation dam across the Yellowstone River is part of a lawsuit filed this month by Defenders of Wildlife and Natural Resources Defense Council against three federal agencies. The groups claim that the pallid sturgeon, a species which dates back to the days that dinosaurs roamed Montana, has declined sharply over the past century due to dams built in the Missouri River drainage.  The lawsuit contends that a planned $59 million dollar upgrade on the Yellowstone  River dam will only build a larger dam, according to the Associated Press.  >Read More http://billingsgazette.com/news/local/article_fded1176-7a0f-5cad-bc44-cd981def5382.html