All Reports

The Tennessee Valley Authority (TVA) operates four coal plants, which are required to comply with the Clean Air Act (CAA).  In 2023, changes to the CAA required the reduction of nitrogen oxide (NOx) from power plants.  To comply with the changes, TVA made the decision to install Selective Catalytic Reduction (SCR) systems at TVA’s Shawnee Fossil Plant (SHF) for Units 2, 3, 7, and 8 and entered into a $59.5 million contract for the design and delivery of SCR systems (SCR systems are emission control technology designed to remove NOx from flue gases emitted by combus

The Office of the Inspector General performed an audit of the Tennessee Valley Authority’s (TVA) Unmanned Aircraft Systems (UAS) Program due to the increased use of unmanned aircraft in TVA operations.  Our audit objectives were to determine if TVA's (1) UAS Program was in compliance with applicable federal requirements and (2) use of unmanned aircraft was in compliance with applicable TVA policies.  Our audit scope included TVA's use of unmanned aircraft from January 1, 2024, through December 31, 2024.

The Tennessee Valley Authority (TVA) Standard Programs and Processes 04.050, Investment Recovery, defines surplus material as material or equipment considered excess at a site that cannot be sold back to the original supplier or manufacturer.  Before items are considered surplus, TVA personnel are responsible for determining if the materials have a forecasted usage at the site or within the TVA fleet within 3 years.

In January 2023, the General Services Administration (GSA) announced that a portion of the Tennessee Valley Authority’s (TVA) Chattanooga Office Complex (COC), which consists of five buildings (Signal Place, Lookout Place, Missionary Ridge (MR), Blue Ridge (BR), and Monteagle Place), was being considered for the site of a new federal courthouse.  In anticipation of a possible move, TVA created a stand-alone project to vacate MR and BR and consolidate (Vacate and Consolidate) into the other three COC buildings.  In March 2024, TVA requested public input on

In April 2015, the United States Environmental Protection Agency published the Disposal of Coal Combustion Residuals [CCR] from Electric Utilities (commonly referred to as the CCR Rule), which set forth national regulations for the safe disposal of coal ash from coal-fired power plants.  On May 8, 2024, the United States Environmental Protection Agency finalized changes to the CCR Rule to include additional classes of regulated CCR storage facilities.

At the request of the Tennessee Valley Authority’s (TVA) Supply Chain, we examined the cost proposal submitted by a contractor for (1) outage and supplemental maintenance and modification services and (2) support services at TVA’s nuclear plants.  Our examination objective was to determine if the cost proposal was fairly stated for a planned $975 million contract.

TVA began hedging natural gas prices in April 2022 under the reinstated Financial Hedging Program (FHP). The program’s stated objectives are to reduce fuel rate volatility and balance operational and financial risks. From its reinstatement in April 2022 through February 2025, TVA’s FHP experienced losses of approximately $645 million.  We performed an audit of the FHP due to the financial risks associated with hedging. Our audit objective was to determine if TVA’s FHP is achieving its objectives of reducing fuel rate volatility and balancing operational a

In 2015, the Environmental Protection Agency issued the Coal Combustion Residuals (CCR) rule, which included requirements for addressing the risks from coal ash disposal.  The Tennessee Valley Authority (TVA) updated the program funding for its CCR management program in 2015 to address compliance with the CCR rule and in 2017 began developing a site-specific project to address coal ash at Gallatin Fossil Plant.  The Gallatin Ash Pond Complex Closure and Restoration (Gallatin Ash) project activities include (1) construction, operation, and closure of on-site lined landfi

At the request of the Tennessee Valley Authority’s (TVA) Supply Chain, we examined the cost proposal submitted by a contractor for (1) outage and supplemental maintenance and modification services and (2) support services at TVA’s nuclear plants.  Our examination objective was to determine if the cost proposal was fairly stated for a planned $975 million contract.

The Tennessee Valley Authority (TVA) owns and operates more than 16,400 miles of transmission lines to deliver electricity to 10 million people in the Tennessee Valley.  TVA has delivered 99.999 percent reliability since the year 2000 and continued investment in its transmission system helps TVA meet the daily challenge of moving power to where it is needed.  Due to the importance of transmission assets to system reliability and the risk associated with the degradation of transmission assets, we performed an evaluation to determine if Transmission (1) is assessing the condit