I don't agree.
The actual construction cost ended up being approximately six or seven times the projected cost.
Not quite that much, but 5.6 times is bad enough. Caused by several factors include multiple significant rule changes by the Fed during design and construction. Root&Scoot contributed to the problems.
That's my recollection and I am sticking with it, but I was in high school at the time and I have lost a lot of grey cells since then.