Transmission lines are vital to the power grid’s functionality, facilitating the efficient transport of electricity across long distances from generation sources to urban centers. They bolster grid resilience by enabling power redirection during disruptions, support load balancing and integration of diverse energy sources, promote economic efficiency through competition, and enable the implementation of modern grid technologies while accommodating future demands and electrification needs.
In total, the top 10 U.S. transmission line owners have 1,404.35 miles of transmission lines since 2023, which is approximately the driving distance from New York City to Miami, Florida. Here are the top 10 U.S. transmission line owners by miles since 2023:
10. Indiana Michigan Power
https://www.indianamichiganpower.com
Miles of Transmission Lines: 15
Indiana Michigan Power, a subsidiary of American Electric Power, provides electric service to customers in Indiana and Michigan. They focus on delivering reliable and affordable energy, supporting economic development and implementing sustainable practices.
9. American Transmission Company
Miles of Transmission Lines: 18
American Transmission Company owns and operates high-voltage electric transmission systems in portions of the Midwest. They ensure reliable electric service by planning, constructing, operating and maintaining transmission lines and substations.
8. Southwestern Electric Power Company
Miles of Transmission Lines: 18
Southwestern Electric Power Company (SWEPCO) provides electric service to customers in Louisiana, Arkansas and Texas. As a subsidiary of American Electric Power, SWEPCO focuses on delivering reliable and affordable energy, supporting economic development and promoting sustainability through renewable energy projects and efficiency programs.
7. Pedernales Electric Cooperative
Miles of Transmission Lines: 19
Pedernales Electric Cooperative (PEC) is the largest electric distribution cooperative in the United States, serving more than 370,000 members in Central Texas. PEC provides reliable electric service, promotes energy efficiency and supports community development.
6. Basin Electric Power Cooperative
Miles of Transmission Lines: 19
Basin Electric Power Cooperative is a consumer-owned, regional cooperative headquartered in North Dakota. It generates and transmits electricity to member rural electric systems in nine states.
5. Duke Energy Florida
https://www.duke-energy.com/home
Miles of Transmission Lines: 23
Duke Energy Florida provides electric services to residential, commercial and industrial customers throughout the state. They focus on delivering reliable and affordable energy, enhancing grid infrastructure and integrating renewable energy sources to promote sustainability.
4. Appalachian Power
https://www.appalachianpower.com
Miles of Transmission Lines: 35
Appalachian Power, a subsidiary of American Electric Power, provides electricity to customers in West Virginia, Virginia and Tennessee. The company focuses on delivering reliable and affordable energy, enhancing grid infrastructure and promoting renewable energy projects.
3. New York Power Authority
Miles of Transmission Lines: 85
The New York Power Authority (NYPA) is the largest state public power organization in the United States, providing low-cost electricity to government agencies, municipal utilities and rural electric cooperatives. NYPA focuses on clean energy initiatives, energy efficiency and grid modernization to support the state’s transition to renewable energy sources.
2. AEP Texas
Miles of Transmission Lines: 98
AEP Texas, a subsidiary of American Electric Power, delivers electric services to customers in South and West Texas. They focus on providing reliable and safe electricity, maintaining and upgrading infrastructure, and supporting renewable energy integration.
1. Lower Colorado River Authority (LCRA)
Miles of Transmission Lines: 1,071
The Lower Colorado River Authority manages the lower Colorado River and provides services including water supply, energy and community development in Texas. They focus on reliable electric transmission, water conservation, flood management and recreational opportunities.
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