Hanford Site (Hanford, WA) - The Hanford Site was established during World War II to produce plutonium for the nation’s nuclear weapons. It is located in the desert of southeastern Washington State. The Hanford mission is now primarily site cleanup/environmental restoration to protect the Columbia River. The cleanup is addressed in commitments in a 1989 consent agreement, known as the Tri-Party Agreement. Parties to the agreement include the DOE, the U.S. Environmental Protection Agency, and the Washington State Department of Ecology.