Retaining wall installed around ash containment unit at Kingston spill site

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Updated: Monday, March 3 2014 7:00 PM EST2014-03-04 00:00:55 GMT

KINGSTON (WATE) - The Tennessee Valley Authority says it has reached a milestone in its cleanup of the ash spill at the Kingston Fossil Plant: the completion of an earthquake resistant, underground retaining wall around the containment cell at the recovery site.

TVA says the wall completely surrounds the 240-acre containment cell where recovered ash was permanently stored.

The wall was completed on February 20, almost a month ahead of schedule.

Construction of the wall began in summer 2011. TVA says it is 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.

The project team is now working on installing the cap and cover over the containment cell. This is expected to be complete by the end of the year.

TVA is also restoring and enhancing the Swan Pond area by installing recreational areas, performing shoreline stabilization, constructing wetlands and planting a variety of native plants and trees.

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Retaining wall installed around ash containment unit at Kingston spill site