The U.S. Department of Energy offers free, four-hour bus tours of the Hanford site ... mile site’s radioactive and chemical wastes. Map points are approximate locations of tour stops.

Environmental cleanup is underway at the 580-square-mile Hanford nuclear reservation. The underground radioactive waste storage tanks and the vitrification plant are in the center of the site.

Tri-City Herald file The 580-square-mile Hanford nuclear reservation adjacent to Richland was used from World War II through the Cold War to produce nearly two-thirds of the plutonium for the ...