From the US Bureau of Reclamation’s photo archive, Hoover Dam seen from the upstream side, circa 1935:

Hoover Dam, 1935, courtesy USBR
From the US Bureau of Reclamation’s photo archive, Hoover Dam seen from the upstream side, circa 1935:
Hoover Dam, 1935, courtesy USBR
Did you ever play Civ? Building the Hoover dam counted as a hydroelectric plant in all of your cities :-).
William – Not unlike how it worked in real life.