I find it ironic that they could lift massive stones at such a breakneck speed that many think Alien technology was used. Yet, they could not even raise water a few hundred feet.
The shaduf, the bucket elevator belt/wheel, the primitive water pumps. Or, if it makes one feel better.....a thousand mules and asses carrying water jars or skin water bags, on wooden or earthen zigzag/switchback ramps to the top.
These people knew water.