POWER MAP of USA

Map

from

Encarta

The National Power Grid

High-voltage electrical transmission lines in the United States are divided into three separate grids that make up what is often called the national power grid. The three grids cover the contiguous 48 states and parts of Canada and Mexico and are known as the Western Interconnection, the Eastern Interconnection, and the Electric Reliability Council of Texas (ERCOT) Interconnection. The three grids operate independently for the most part but are connected in a few places by direct-current lines. All United States power utilities, except those in the states of Alaska and Hawaii, are connected to other power utilities through the national power grid. Dispatch centers maintain and control the flow of electricity over the grid, supplying electricity to meet the demand.

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