AndrewDucker parent
You don't need to use a river for pumped storage, you can even have a (mostly) closed-state solution that pumps water back and forth between two holding tanks.
What does a river have anything to do with what I asked?
You seemed to think that the water would be susceptible to drying up in drought conditions, presumably because the river feeding it would dry up.
I'm seeming to think nothing while knowing that the drought conditions slow the replenishing of the water levels, but the water levels are lowering faster than just evaporation because Texas lakes are water supplies for the cities. That drains the lake levels much faster than just being in a drought.