The U.S. Department of Energy (DOE) Richland Operations Office declared an emergency at the Hanford Site at approximately 8:30 PDT after a cave-in of a 20-foot (6 meters) section of a tunnel that is hundreds of feet long that is used to store contaminated materials. The tunnel is located next to the PUREX which is located in the center of the Hanford Site, in an area known as the 200 East Area. "No contamination has been detected following the cave-in," the agency said in a statement. "Crews are continuing to survey the area for contamination and workers are preparing to fill the hole created by the cave-in in order to stabilize the tunnel," it said.