If the Great Pyramid is a Water Pump why is there no water erosion inside the passages and chambers?
The Great Pyramid has suffered much damage by barbarians of all ages there is no damage by erosion. In researching this matter I contacted the chief engineer (now retired) at the Grand Coulee Dam in Washington state and asked him about erosion at that dam. He indicated that after 50 years of continues operation with many tons of water passing through the dam every second that there is no water erosion. Similar findings were reached at the Panama Canal. Seventy five years of continuous operation has resulted in no erosion by water. To be sure those examples are of concrete structures. Granite which lines much of the chambers is more impervious to erosion than concrete. That is why granite is used in this application.
