" if we were to build a Great Pyramid today, we would need a lot of patience. In preparation for his book "5/5/2000 Ice: The Ultimate Disaster", Richard Noone asked Merle Booker, technical director of the Indiana Limestone Institute of America, to prepare a time study of what it would take to quarry, fabricate, and ship enough limestone to duplicate the Great Pyramid. Using the most modern quarrying equipment available for cutting, lifting, and transporting the stone, Booker estimated that the present-day Indiana limestone industry would need to triple its output, and it would take the entire industry, which as I have said includes thirty-three quarries, twenty-seven years to fill the order for 131,467,940 cubic feet of stone.
These estimates were based on the assumption that production would proceed without problems. Then we would be faced with the task of putting the limestone blocks in place. The level of accuracy in the base of the Great Pyramid is astounding, and is not demanded, or even expected, by building codes today. Civil engineer Roland Dove, of Roland P. Dove & Associates, explained that .02 inch per foot variance was acceptable in modern building foundations. When I informed him of the minute variation in the foundation of the Great Pyramid, he expressed disbelief and agreed with me that in this particular phase of construction, the builders of the pyramid exhibited a state of the art that would be considered advanced by modern standards. "

― Christopher Dunn , The Giza Power Plant: Technologies of Ancient Egypt