Hoover dam was bigger, and it was continuous.
Hoover dam was a lot of separate pours. They allowed the concrete to dry before pouring the next level.
That’s what I was wondering. Certainly the dam couldn’t have been continuous from bottom to top, could it? How would the bottom of the forms withstood the concreto-static pressure till it cured? I’d have assumed they’d pour it like a layer cake in maybe 20-foot layers. Even if it wasn’t, I could still see single pours bigger than this one. But how would Guinness have missed such an obvious one? And what about 3-gorges dam in China? That one’s immense.
And because when concrete sets up, its an exothermic ( heat producing) process, deep inside Hoover it’s still HOT. The dam actually has hundreds of miles of piping inside the concrete..water runs through it to cool it..