A body would a been a problem with structural integrity.
I can’t believe they did pours in inches at a time. Sheesh, they’d still be pouring the thing today. I’m thinking more like 10 or 20 ft of height at a time. Reasonable balance of required form strength and progress rate.
“There are no bodies in the dam.”
But, but , but... There was a song about it.
I was a dam builder across the river deep and wide
Where steel and water did collide
A place called Boulder on the wild Colorado
I slipped and fell into the wet concrete below
They buried me in that great tomb that knows no sound
But I am still around..I’ll always be around..and around and around and
around and around