Test shutdowns in the late 1970s early 1980s, all three turbines were probably running at maximum power and the upper reservoir was quite full, that's why the water is rising so high. The original film has no sound, hence the background music.
Edgar Müller
Director
Koyaanisqatsi79%
Super 867%
The Bad and the Beautiful72%
American Reunion63%
Hot Shots!65%
Mariah Carey's Magical Christmas Special62%
Teen Beach Movie69%
The Congress64%
The Crazies63%
Nanny McPhee and the Big Bang63%
Mulan II65%
Frankenweenie70%
The Social Dilemma74%
Code 370%
Shark Tale60%
Napoleon62%
Scooby-Doo! Mecha Mutt Menace84%
The Commuter63%
Madagascar: Escape 2 Africa65%
The Spy Next Door58%