My problem with the description above: "An underground pipe brings water from high up the mountains, usually 60 meters or more," turns out not to be the 60 meters, but "from high up in the mountains."
The top of the pipe is indeed only 60 m, giving enough head (behave yourselves) for a possible 60 m stupa, but the distance may be less than a mile away.
http://icestupa.org/about