Yeah, I photographed this story for the Smithsonian. It was talking about how the stones were transferred by boat from near Tora to Saqqara.

The water came most of the way up to the now seasonal lake near the pyramids there.

But also the river used to flood so there were some seasons when the water was high enough to easily transport the stone directly from Tora I assume.

https://www.smithsonianmag.com/history/ancient-egypt-shippin...