hydrokinetic schauberger turbines!

During the middle of the century a water power genius named Victor Schauberger created a special kind of hydro power machine called a "repulsine"  this device did not need dams or falling water to work.  The machine ran on regular flowing water in rivers...NO DAMS!  it used the factors of speeding water by shrinking channels and causeing the water to spin in a vortex fashion.  This stuff is used today to get hydro power without dam building!
http://inventors.about.com/od/sstartinventors/a/schauberger.htm