All Reports

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

The Federal Information Security Modernization Act of 2014 (FISMA) requires each agency’s Inspector General to conduct an annual independent evaluation to determine the effectiveness of the information security program (ISP) and practices of its respective agency.  Our objective was to determine the effectiveness of the Tennessee Valley Authority’s (TVA) ISP and practices as defined by the FY 2025 IG FISMA Reporting Metrics.  Our audit scope was limited to answering the fiscal year (FY) 2025 IG metrics, which include 20 core and 5 supplemental IG metrics. The FISMA

We performed an audit of the costs billed to the Tennessee Valley Authority (TVA) by Johnson Service Group, Inc. (JSG) under Contract No. TVA‑04012020‑125806 for noncraft staff augmentation services.  Our audit objective was to determine if the costs billed to TVA by JSG were in accordance with the contract’s terms.  Our audit scope included about $32.5 million in costs billed to TVA from June 26, 2024, to March 11, 2025. 

The Tennessee Valley Authority’s (TVA) Supply Chain organization enters into blanket contracts with vendors to support TVA goals and lower total costs to TVA.  Blanket contracts are defined as open-scope contracts under which TVA may place multiple orders for designated products or services over a set timeframe.  Defined scopes of work and TVA’s commitment to buy are established through purchase orders (PO) issued against existing blanket contracts.

The Tennessee Valley Authority (TVA) has developed a dam safety program to protect lives and property by ensuring that structures within the program are designed, constructed, and maintained as safely and reliably as practicable.  This program applies to dams, dikes, impoundments, levees, water barrier components, pumping stations, and other appurtenant structures that are included in TVA’s Dam Safety Program inventory.  Due to the importance of maintenance and inspections to the reliable operation of assets, we performed an evaluation of TVA dams to determine if maintenance

The Office of the Inspector General conducted an audit of TVA’s cloud inventory due to the Tennessee Valley Authority’s (TVA) increased use of cloud services.  Our objective was to determine if TVA maintained an accurate and complete cloud inventory.  Although we determined TVA’s (1) defined processes related to managing cloud inventory were designed in alignment with identified best practices, and (2) access controls for the cloud inventory were operating effectively, TVA does not maintain an accurate and complete cloud inventory.  Specifica

The Office of the Inspector General conducted an evaluation to determine if fire‑protection and ammonia safety systems at TVA coal plants were being properly maintained and identified issues were being addressed.  We determined ammonia systems were being properly maintained and identified issues were being addressed.  However, we determined fire protection systems were not always properly maintained and issues were not always being addressed timely.  Specifically, (1) some inspections and testing of fire-protection syst

As part of our annual audit plan, we performed an audit of costs billed to the Tennessee Valley Authority (TVA) by Terracon Consultants, Inc. (Terracon) for geotechnical and hydrogeological site investigations and groundwater quality monitoring services under Contract No. 15087.  Our audit objective was to determine if costs were billed in compliance with the contract’s terms.  Our audit scope included $9.93 million in costs paid from January 3, 2022, through October 21, 2024.