All Reports

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.

We performed an audit of costs billed to the Tennessee Valley Authority (TVA) by Wright Brothers Contracting, Inc. (Wright Brothers) for site grading services and materials under Contract No. 16512.  The contract provided for TVA to compensate Wright Brothers for work on a fixed price basis for deliverables and materials and on a time and material (T&M) basis for performance of the work.

We are pleased to present our report for the period October 1, 2024, to March 31, 2025.  In this semiannual period, our audit, evaluation, and investigative activities identified more than $75.1 million in questioned costs; funds put to better use; restitutions, recoveries, fees, and fines; and opportunities for the Tennessee Valley Authority (TVA) to improve its programs and operations.

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

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 Microsoft Entra® ID.  We determined TVA has required and enforced the use of MFA for all accounts with limited exclusions for service accounts. Additionally, we reviewed a sample of service accounts and determined they were approved and documented in accordance with t

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 megawatts (MWs) of the planned 160 MWs, which could impact TVA’s ability to recover the costs incurred to support the manufacturer.  In addition, analyses conducted by TVA identified causes for cost overruns and action plans were developed to mitigate the risk of cost over

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 proposal was fairly stated for a contract with expenditures up to $175 million.