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Exhibit 27-10

The ERCOT Electric Transmission Grid

ERCOT’s electric transmission grid covers 75 percent of the land in Texas and 85 percent of the population in Texas. ERCOT’s transmission grid looks like a spider web or maze of transmission lines crossing the state with clusters of densely packed lines in and around the major urban areas of Dallas/Ft. Worth, Houston, San Antonio and Austin. ERCOT’s sphere of authority is defined by its electric grid and the customers it serves

For more information on this exhibit, please contact the Comptroller’s Data Services Division at 512-463-4900 or at P.O. Box 13528, Austin, Texas 78711-3528.

Source: U.S. Energy Information Administration.

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