I know a lot about the pumps, did a special research paper on them in grad school.
Just can't remember the power source.
They are huge. If I recall correctly there are about 14 of them, about 12 ft in diameter. They are called "Wood screw pumps" designed by a guy named Wood.
Just one of these pumps is used to drain the Zuider Zee in the Netherlands.
Google "wood screw pump" and you will find a lot but you will have to go into Google cache as the power for the servers is out in NO. Thank Google for Google cache.
Steve H. smells "something burning"...I feel like I'm watching Bob Newhart.
sw