As part of our annual audit plan, we performed an audit of costs billed to the Tennessee Valley Authority (TVA) by Slick Rollers, LLC (Slick Rollers) for coal and limestone handling system support materials and/or services at various TVA fossil plants under Contract No. 14457. Our audit objective was to determine if costs were billed in accordance with the terms and conditions of the contract. Our audit scope included about $10.3 million in costs billed to TVA from August 13, 2019, through December 16, 2021.