Pretty sure they are everywhere<p>This list is missing the one I know about -<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;List_of_pumped-storage_hydroelectric_power_stations" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;List_of_pumped-storage_hydroel...</a><p>Given the first thought is how does this compare to pumped hydro, I worry this is vaporware.