The Tennessee Valley Authority expects the Boone Dam project to be completed in spring 2022.The TVA is constructing a floodwall and restoring the crest of the earthen dam.“We had to shave off ten feet of the earthen dam for the (cutoff wall) project,” said technical director Chris Saucier. “Now we are restoring that to permanently provide the same elevation of flood protection as that which existed before October 2014.” The TVA will begin lowering Boone Lake levels after Labor Day, according to the normal operating guide curve.