The Electric Power Research Institute (EPRI) has engaged in a supplemental research project examining the experiences and lessons learned at the state-of-the-art Archimede concentrating solar power (CSP) plant. Enel developed Archimede with the goal of demonstrating, on an industrial scale, parabolic trough collectors operating with molten salt working fluid and direct thermal energy storage (TES) integrated into a combined cycle plant using high-temperature steam. To expand on the knowledge gained from this project, project members expressed interest in learning about experiences at additional parabolic trough projects with TES. Accordingly, EPRI has gathered information on additional larger-scale parabolic trough projects (units at 50-MW capacity or larger) with TES, focusing on design, operational strategies, maintenance issues, and performance. This report summarizes industry experience and expertise to help readers better assess larger-scale parabolic trough units with TES. It presents information on three operating plants, Andasol and Arenales in Spain and Solana in the United States, drawing primarily from publicly available information, as well as operator and vendor input. EPRI also polled select solar experts to obtain insights on the status of such parabolic trough units.