Gail the DOE , 2003 study I have linked to in article shows that many dams don't generate any power or can be upgraded to produce additional power for $1600/kWh capacity( 2003 figures). This is not much more than NG peakers, but very little running costs

Thanks. I didn't get a chance to read the new study. I think it would be a good one for Oil Drum folks to look at.