Right, the thing to worry about is power, not energy. Ideally the pumps would be sized to fill/drain lake Powell in 12 hours. Which is ludicrous. The turbines i

Right, the thing to worry about is power, not energy. Ideally the pumps would be sized to fill/drain lake Powell in 12 hours. Which is ludicrous. The turbines in the Glenn Canyon Dam have a max (output) capacity of 890m^3/s [0]. It would take just over a year to drain the reservoir through them. [0] https://web.archive.org/web/2016*/http://www.gcrg.org/bqr/6-1/glencanyon.htm https://web.archive.org/web/2016*/http://www.gcrg.org/bqr/6-...