Colstrip plants 3 and 4 got a provisional green light and Missoula City Council voted to remove the Milltown Dam.

A judge on Thursday ordered the Justice Department to either release unredacted versions of several files on the late sex offender Jeffrey Epstein or explain why it can't do so.

Arizona's congressional delegation has selected one of the state's most enduring symbols — copper — to represent Arizona in a time capsule that will remain sealed until the ...

The federal government is considering a framework to cut Colorado River water use in Arizona, California and Nevada by as ...