See our Idaho Families for Clean Water YouTube video explaining that preliminary environmental studies were not done before the CuMo mine exploration in the Boise River watershed was permitted by the U.S. Forest Service. See also Advocates for the West article that a U.S. District Judge has ruled that there are significant environmental concerns.
http://www.advocateswest.org/bulletin/cumo-mine-win
http://youtu.be/TM9bWTAXB48?hd=1