Tennessee Valley Authority OIG

The Office of the Inspector General performed an audit to determine if the Tennessee Valley Authority’s (TVA’s) corporate deployment of Microsoft 365® was configured to require and enforce the use of multi-factor authentication (MFA) for all accounts. Our scope was limited to MFA managed through...

The Office of Inspector General determined risks to Tennessee Valley Authority resulting from lower-than-expected demand by a manufacturer was not considered and actions to address cost overruns were not fully implemented. Specifically, the manufacturer’s monthly demand averaged approximately 10...

At the request of the Tennessee Valley Authority’s (TVA) Supply Chain, we examined the cost proposal submitted by a company for designing, fabricating, and delivering hydraulic turbine runners and components as specified by TVA. Our examination objective was to determine if the company’s cost...

The Office of the Inspector General performed an audit of TVA’s transmission network cybersecurity. The audit scope was limited to a specific type of connectivity within TVA’s transmission network. The audit objective was to determine the level of cybersecurity in place for this type of connectivity...

In January 2023, the Tennessee Valley Authority (TVA) issued a record of decision to retire and demolish its Cumberland Fossil Plant and replace one of its two units with a natural gas plant. Subsequently, TVA implemented the Cumberland Energy Solution (CES) project to construct a 1,450-megawatt...

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...

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...

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...

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...

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...