Contract for air preheater equipment at TVA fossil plants

We audited the costs billed to TVA by a contractor for the design, engineer, and delivery of air preheater equipment for TVA fossil plants. Our audit, which covered $23.2 million TVA had paid the contractor, found TVA had been overbilled at least $2,232,780.The contract provided for all work, with the exception of a baseline project at Allen Fossil Plant, to be performed on a cost reimbursable basis. However, we found the contractor had overbilled TVA at least $2,025,739 on four additional fossil plant projects because it had billed fixed prices instead of using the required cost reimbursable terms. The actual overbilling may have been higher because our calculation of the overbilling used a maximum fee rate the contractor would have been eligible to receive. In addition, the contractor overbilled $207,041 for field technician services because incorrect billing rates had been used.We recommended TVA management recover the overbilled costs from the contractor. Summary Only