http://www.providencejournal.com/breaking-news/content/20130907-developer-seeks-to-use-ancient-technology-to-draw-energy-from-pawtuxet-river.ece
Developer seeks to use ancient technology to draw energy from Pawtuxet River
"Cioe, a property developer based in North Kingstown, plans to build a hydropower project at the Natick Pond Dam that would be the first in the United States to use Archimedes’ screws, generators named for the third-century B.C. Greek engineer and scientist who is thought to have popularized the devices to pump water upward for irrigation and drainage.
When used in reverse, Archimedes’ screws have in recent years in Europe proven to be an efficient way to harness the downward flow of water to generate electricity. But the generators, which resemble giant corkscrews, have never been installed on this side of the Atlantic.
