O.k my first subject was for Hydroelectric power, and there was only one person who gave me acouplegoodlinks for that subject so here they are.
http://ga.water.usgs.gov/edu/hyhowworks.html
http://www.parks.ca.gov/?page_id=1350
The helper was @daniels_caudill
Now you can help on my next subject! Don't know what it is? Just follow me and see!