4 ms·Is a Dam in Rural Portugal a Key to Our Alternative Energy Future?2 points by amadeuspagel 4y agojqpabc123 4y agoPumped storage is not new and is not limited to Portugal. There are 42 pumped storage sites in the USA. Some have been operating for decades.haspoken 4y agohttps://archive.is/ZUVDW https://archive.is/ZUVDW