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How Transmission Line Projects Work

​Working closely with state agencies, we take several things into consideration before we begin new transmission line projects. While some of the steps below overlap, here’s how the process typically works:

  1. Determine need. First, the need for a project is identified and studied years before it begins. For example, the Public Utility Commission of Texas (PUCT) identified a need for Competitive Renewable Energy Zone (CREZ) Projects in 2005 to deliver energy from cleaner sources and alleviate congestion on the state’s grid.
  2. Consider routes. Then, we develop a project study area and analyze multiple alternative routes. We consider many factors including the values of impacted communities, environmental integrity, historical and aesthetic values, and recreational and park areas, as well as cost, engineering constraints, and possible use of existing rights of way.
  3. Involve community and landowners. Public officials, communities and landowners in the area of a proposed project have a number of opportunities to participate in the routing and certification stages of a proposed project. We encourage customers to learn more and get involved through public meetings and open houses, and are committed to sharing information with anyone affected by alternative routing.
  4. Obtain approval. Next, Oncor files an application, also known as a request for a Certificate of Convenience and Necessity (CCN), with the PUCT. The certification process typically takes six to 12 months from the application filing date. During this time, parties impacted by the application have the opportunity to participate in PUCT proceedings.
  5. Begin construction. After the PUCT approves a proposed project, we continue to work with landowners affected by the chosen route to obtain right-of-way and consider issues specific to their property. Then construction begins.

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