About Us

The U.S. Department of Energy selected Washington Closure Hanford on March 23, 2005, to manage the River Corridor Cleanup Project at the 586-square-mile Hanford Site in southeastern Washington state.  Washington Closure is a limited liability company owned by Washington Division of URS Corp., Bechtel National and CH2M HILL. Washington Closure has the single purpose of safely cleaning up and closing the Hanford river corridor.

River Corridor Cleanup Project work scope

The Columbia River corridor comprises 218 square miles along the outer edge of the Hanford Site, including major portions of the Hanford Reach National Monument.

The scope of work for the River Corridor Cleanup Project team is to safely demolish hundreds of excess facilities, clean up waste sites and burial grounds and place deactivated plutonium production reactors into interim safe storage.

The work includes projects in Hanford's 100 Area, where materials for nuclear reactors were created at nine plutonium production reactors; 300 Area, where uranium was fabricated and laboratory facilities reside; 400 Area, where facilities, except for the Fast Flux Test Facility, will be demolished; and 600 Area, where two complex and highly radioactive burial grounds – 618-10 and 618-11 – are located.