There are already 1500 reservoirs in California. It's a myth that there are un-impounded streams waiting to be captured. There really are not. Just look at the area around Placerville. There is Sugar Pine, Loon, Big, French Meadows, Ice House, Hell Hole, Stumpy Meadows, Union Valley, Sly Park, and, of course, Folsom Lake. That's all in a diameter of only 30 miles.