The Bureau of Reclamation (Bureau) and the U.S. Army Corps of Engineers (Corps) announced they will build a concrete dam across the lower Yellowstone River near Glendive, Montana. The dam will cause irreparable harm to the nation’s largest wild population of endangered pallid sturgeon, an ancient fish species with ancestors dating back to the time of dinosaurs, living in the upper Missouri and Yellowstone Rivers as well as several other fish species using the lower Yellowstone