THE PEOPLE HAVE spoken. They want choice in power supply in California and in other states. But people are also "load," at least in utility parlance. And some load in some areas can prove awfully difficult to serve. They're called "load pockets."
A load pocket is formed when a deficiency in transmission capacity to a market area cannot be priced away sufficiently to clear the market during peak-load periods. Consequently, the market area must rely on "must-run," local generation units during part of or all of the year.