While a new, large pumped storage hydropower (PSH) project has not been developed in the U.S. since the 1990s, PSH projects are being developed elsewhere around the world. Europe has completed several new and upgraded plants in the past 20 years, and China and Japan have the most pumped storage capacity in the world. This panel will present an international perspective of pumped storage developments, challenges, new construction technologies, market drivers and other solutions for overcoming the development barriers of these large, complex projects to meet the energy needs of the 21st century.