Mission | About Us

Located on the 586-square-mile Hanford Site in southeastern Washington state, the 220-square-mile River Corridor comprises the outer edge of the Hanford Site, including major portions of the Hanford Reach National Monument.

Washington Closure was selected by DOE to manage the project in August 2005. The contract ran through September 2016.

Our mission:  Remove the environmental risk and hazards near the Columbia River Corridor through efficient, safe and compliant procedures while safeguarding people and the environment.

View Washington Closure Hanford video.


Columbia River Corridor

Cleanup of the Columbia River Corridor helps protect the river by removing contaminants that could enter the river. It also supports the DOE's vision for cleaning up the River Corridor and reducing the footprint of active cleanup at Hanford.

The River Corridor includes the land bordering the Columbia River. Within it, cleanup projects are located in:

Washington Closure was a limited liability company owned by AECOM, Bechtel National and CH2M