Tennessee Valley Authority OIG

The Tennessee Valley Authority (TVA) has four coal plants that include 24 units with a combined net capacity of 5,815 megawatts. These coal plants have operated well beyond their original book life and are among the oldest still in operation in the nation. Due to the performance and cost risks of...

The Tennessee Valley Authority’s (TVA) three nuclear plants, Browns Ferry, Sequoyah, and Watts Bar, are capable of generating an average of 8,275 megawatts of electricity, making TVA the third-largest nuclear fleet in the United States. In fiscal year 2025, TVA generated 56,157 million kilowatt...

We performed an audit of the Tennessee Valley Authority’s (TVA) Contract No. 15387 with a company to provide a broad range of engineering, design, and construction management support when and as requested by TVA. The objective of our audit was to determine if the costs billed to TVA were in...

We are pleased to present our report for the period October 1, 2025, to March 31, 2026. In this semiannual period, our audit, evaluation, and investigative activities identified more than $41.7 million in questioned costs, recoveries, fees, and savings; and opportunities for Tennessee Valley...

The Tennessee Valley Authority’s (TVA) Enterprise Risk Management (ERM) business unit focuses on identifying and prioritizing enterprise risks. Annually, ERM leads the preparation of an enterprise risk portfolio, which includes risks across TVA, to aid leadership in strategic and business planning...

The Tennessee Valley Authority (TVA) plans to invest approximately $7 billion to extend and preserve the life of its seven nuclear units over the next 20 years. Selection of suppliers responsible for maintenance or system upgrades within TVA’s nuclear fleet can affect TVA’s ability to maintain...

To meet the Tennessee Valley region’s growing demand for power, the Tennessee Valley Authority (TVA) is investing in existing assets and new generation. In fiscal year 2025, TVA invested more than $4.6 billion in capital investments and plans to invest $4.2 billion in fiscal year 2026. Due to...

Due to the importance of protecting operational technology from cybersecurity threats, we audited the security of a specific type of system access at the Tennessee Valley Authority’s (TVA) gas sites. Our objective was to determine if a specific type of system access supporting Gas Operations was...

We performed an audit of costs billed to the Tennessee Valley Authority’s (TVA) by a contractor for nuclear steam supply system refueling and inspection services at TVA’s Watts Bar Nuclear Plant and Sequoyah Nuclear Plant. The contract provided for TVA to compensate the contractor on a time and...

Due to constraints on the existing fiber network, in May 2017, the TVA Board of Directors approved the Strategic Fiber Initiative (SFI) with a budget of $300 million to expand TVA’s fiber capacity by 3,500 miles over the course of ten years on 31 prioritized routes. In addition, TVA planned to lease...