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Recovery at Kingston: Closure of the Failed Ash Dredge Cell

Stantec’s Alan Rauch, PhD, PE, details a sweeping engineering solution for the Tennessee Valley Authority


The largest coal ash spill in US history occurred in 2008 at the Tennessee Valley Authority’s (TVA) Kingston, TN fossil plant. Stantec’s Alan Rauch, PhD, PE, details the engineering challenges of the cleanup and closure of the failed ash dredge cell in the current issue of Power Engineering magazine.

Over the past five years, Stantec has been working with TVA to address many technical challenges on this complex recovery project. Rauch was design lead engineer for the unique stabilized perimeter at the failed ash storage facility. The largest wall of its kind in the U.S. at nearly 64,000 linear feet—the equivalent of 12 miles—it is designed to withstand a magnitude 6.0 earthquake. More than 200,000 tons of cement and other materials were used to construct the wall, which is keyed into bedrock at depths up to 70 feet.

The containment cell wall’s completion was announced by TVA on March 4, 2013. Craig Zeller, the U.S. Environmental Protection Agency’s on-site administrator commented, “Construction of the wall is an impressive engineering achievement. While slurry wall technology has been used by the environmental protection industry for many years, the application at TVA’s Kingston site is very unique due to the complex, seismic design; construction techniques; comprehensive geotechnical quality control requirements, and overall size of the wall.”

You can read Dr. Alan Rauch’s article here.

About Stantec

We’re active members of the communities we serve. That’s why at Stantec, we always design with community in mind.  The Stantec community unites more than 13,000 specialists working in over 200 locations. Our work—professional consulting in planning, engineering, architecture, interior design, landscape architecture, surveying, environmental sciences, project management, and project economics—begins at the intersection of community, creativity, and client relationships. With a long-term commitment to the people and places we serve, Stantec has the unique ability to connect to projects on a personal level and advance the quality of life in communities across the globe.

Media Contact                                              

Marti Mueller
Stantec Media Relations
Ph: (585) 766-8689
marti.mueller@stantec.com

The largest wall of its kind in the U.S. at nearly 64,000 linear feet—the equivalent of 12 miles— it is designed to withstand a magnitude 6.0 earthquake.

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