The TVA headquarters building is located in downtown Chattanooga.

The nation's congressional watchdog agency has questioned whether TVA is making the most cost-effective decisions to meet future electricity needs, especially with regard to energy efficiency.

The Tennessee Valley Authority has moved ahead with plans that include building more nuclear reactors without a complete analysis of the potential to reduce electricity use, the U.S. Government Accountability Office says.

"TVA cannot be certain that its plans to meet future demand, largely by building new generating capacity, are the most cost-effective," the GAO said in a report released Dec. 1.

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