All Reports

The Tennessee Valley Authority's (TVA) transmission planning process includes assessing the capacity of the transmission system to reliably deliver power from generation resources to customer loads.  Due to the importance of ensuring TVA’s transmission system can accommodate its generation strategy and ensure adequate system margins to allow for reliable customer supply, we performed an evaluation to determine if TVA’s plans for transmission capacity support (1) planned generation additions and (2) demand growth.

The Tennessee Valley Authority’s (TVA) 5-year Enterprise Technology Plan seeks to transform the way TVA does business through technology and digital innovation.  Digital Finance is one of seven efforts within this multi-year initiative, aimed at modernizing and streamlining TVA’s financial systems and processes.  Modernization of the general ledger (GL) is the first step within Digital Finance. The objectives of the GL Modernization project include implementing an enterprise financial management system with minimal customization, redefining and modernizing TVA’s chart o

The Tennessee Valley Authority (TVA) provides credit cards, known as the TVA One Card, to its employees to make purchases for TVA business, such as materials and supplies, travel, meetings and events, fuel for rental vehicles, management expenses, and services.  TVA transitioned from separate corporate credit cards and purchasing cards to the TVA One Card in 2022 and implemented a new expense management system.  For the 12-month period of May 1, 2023, through April 30, 2024, purchases made on the TVA One Card totaled $86.6 million.

The Tennessee Valley Authority (TVA) has set a goal of increasing its solar capacity to 10,000 megawatts by 2035.  Due to issues in the solar industry resulting in project delays and price increases, we performed an audit of TVA’s solar power purchase agreements (PPAs).  Our audit objectives were to determine (1) how supply chain disruptions, construction and in‑service delays, contract restructuring, and other factors have affected TVA’s solar PPAs and (2) if any restructured PPAs are still in TVA’s financial interest.

The Office of the Inspector General performed an audit of the Tennessee Valley Authority’s (TVA) cybersecurity vulnerability management program.  Our objective was to determine if TVA is compliant with the Cybersecurity and Infrastructure Security Agency (CISA) Binding Operational Directive (BOD) 22-01, Reducing the Significant Risk of Known Exploited Vulnerabilities (KEVs), and CISA BOD 19-02, Vulnerability Remediation Requirements for Internet-Accessible Systems. 

At the request of the Tennessee Valley Authority’s (TVA) Supply Chain, we examined the cost proposal submitted by a contractor for the New Caledonia Gas Plant.  Our examination objective was to determine if the cost proposal was fairly stated.  The contractor proposed a target cost estimate (TCE) of approximately $474.7 million for the construction of a potential simple cycle natural gas electricity generating plant at TVA’s New Caledonia site in Steens, Mississippi.

We performed an audit of the costs billed to the Tennessee Valley Authority (TVA) by Burns & McDonnell Engineering Company, Inc (B&M) under Contract No. 15388 for engineering services.

The Tennessee Valley Authority (TVA) currently operates 101 natural gas- and fuel oil-fired generators at 18 sites.  During 2020, we performed an evaluation of overtime worked at TVA gas plants and found a significant amount of overtime was being worked by employees at some plants.  In response to that evaluation, TVA hired additional full-time employees at some gas plants.  However, overtime worked at gas plants has continued to increase since our previous evaluation.

The Tennessee Valley Authority (TVA) currently operates 29 power-generating hydro plants and one pumped-storage plant.  Between June 1, 2022, and May 31, 2024, employees at TVA’s hydro plants were paid a total of $71.7 million.  Of this $71.7 million, $15.1 million (21 percent) was paid for 187,579 hours of overtime to 243 employees. 

The Tennessee Valley Authority (TVA) Nuclear organization has a vision to be the top nuclear fleet by the end of fiscal year 2025 and an initiative to sustain top quartile performance.  Selection of suppliers responsible for maintenance or system upgrades within TVA’s nuclear fleet can affect TVA’s ability to maintain top quartile performance and achieve TVA Nuclear’s vision.  Two departments essential for making supplier selections are each plant’s respective Site Projects group and TVA’s Supply Chain (SC) organization.  Through soliciting vend