Tennessee Valley Authority
For the period ended Sep 30, 2025. Filed Nov 13, 2025.
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FY2025 · Filed Nov 13, 2025
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Transmission Properties
TVA's transmission system interconnects with systems of surrounding utilities and, at September 30, 2025, consisted primarily of approximately 2,500 circuit miles of 500 kilovolt, 12,100 circuit miles of 161 kilovolt, and 1,900 circuit miles of other voltage transmission lines; 5,445 miles of fiber optic lines; 590 transmission substations, power switchyards, and switching stations; and 1,361 customer connection points (customer, generation, and interconnection).
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