Tennessee Valley Authority OIG

Between January 1, 2022, and July 8, 2025, TVA spent about $47 million on tools across the fleet. Due to the amount spent on tools at TVA, we performed an audit of TVA’s tool management controls. Our audit objective was to determine if controls are in place to safeguard tools at selected sites. Our...

As part of our annual audit plan, we performed an audit of costs billed to the Tennessee Valley Authority (TVA) by Day and Zimmerman NPS, Inc. (DZNPS) for the services of qualified craft, noncraft, or staff augmented personnel to perform modification, outage, supplemental maintenance, and technical...

We performed an audit of the Tennessee Valley Authority’s (TVA) Contract No. 13814 with Hitachi Energy USA, Inc. (Hitachi). Under the contract, Hitachi was to design, furnish, and install/commission power transformers and related equipment at TVA designated locations. Our audit objectives were to...

The Tennessee Valley Authority (TVA) routinely engages in business meetings and external relationship events to conduct business and develop improved relationships. TVA Standard Programs and Processes 13.063, Business Meetings & External Relationship Events , requires all employees responsible for...

During fiscal year 2024, the Tennessee Valley Authority (TVA) communicated its intent to invest approximately $7 billion over the next 20 years to ensure safe and reliable operations of its three nuclear sites. This investment is to extend and preserve the life of its nuclear units and will be...

We performed an audit of costs billed to the Tennessee Valley Authority (TVA) by TRC Environmental Corporation (TRC) for energy efficiency services provided in support of TVA’s EnergyRight® Services for Business and EnergyRight® Services for Industry under Contract No. 15361. Our audit objective was...

Due to the risk of harm to the Tennessee Valley Authority (TVA) from the loss or breach of private information held by a third party, we performed an audit of BlueCross BlueShield of Tennessee’s (BCBST) security controls. Our audit objective was to determine if BCBST has controls in place to meet...

Due to the importance of protecting the Tennessee Valley Authority’s (TVA) operations from external cyber events, we performed an audit of TVA’s transmission control center network cybersecurity. The audit objective was to determine if TVA has sustainable processes for identifying, implementing, and...

Due to the importance of protecting the Tennessee Valley Authority (TVA) operations from external cyber events, we audited TVA’s protection mechanisms for a specific cyberattack. Our objective was to determine if TVA’s protection mechanisms to prevent or protect against a specific type of...

Due to the importance of security measures required to protect the Tennessee Valley Authority’s (TVA) information and operations from cybersecurity threats, the OIG performed a penetration test of TVA’s network, systems, and applications. Our objective was to determine if vulnerabilities and other...