http://www.tri-cityherald.com/901/story/134741.htmlMost of the tenants have communication towers on the mountain or possibly power lines, but the list also includes the Alliance for the Advancement of Science Through Astronomy.
Other agencies that were sent the DOE letter were the Coast Guard, the U.S. Department of Justice, the Washington State Emergency Management Division, Energy Northwest, Franklin and Benton County Public Utility Districts, Day Wireless Systems, Crown Castle International, Columbia Communications, Tri-Cities Amateur Radio Club and Battelle.