The video says that they toke the water from springs under the pyramid. If the spring has enough pressure to make the water climb to 150 m, then just opening a vertical hole you must get a 150 m water jet. (Really, the water in the jet moves faster, so it has more internal frictions with the spring wall.) In Yellowstone, Old Faithfull has 50 m water jets, but it’s a geyser, not a cold spring with a lot of water.
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I was wondering too. This video explains in more detail how they used pressure to move the water up
http://youtu.be/C1y8N0ePuF8?t=15m20s
The video says that they toke the water from springs under the pyramid. If the spring has enough pressure to make the water climb to 150 m, then just opening a vertical hole you must get a 150 m water jet. (Really, the water in the jet moves faster, so it has more internal frictions with the spring wall.) In Yellowstone, Old Faithfull has 50 m water jets, but it’s a geyser, not a cold spring with a lot of water.
Archeologists would be able to find evidence of these water piping from springs underneath the pyramid.
I agree, they say that they should have found evidence of ramps... well they should have found evidence of this water structure if it was used.