Developing America’s Next-Generation Energy Infrastructure

Three Corners Connector

Three Corners Connector is a 300-mile, up-to-525-kilovolt, high-voltage direct current (HVDC) transmission line connecting the U.S. eastern and western electric grids, with endpoints in Pueblo, Colorado, and Guymon, Oklahoma. Three Corners Connector will transport electrical power of all generation sources and bidirectionally move power along the line in response to demand.

Project Status

Three Corners Connector is in the planning and development phase and has a proposed route. Using community and stakeholder feedback, Three Corners Connector will finalize the route analysis and initiate regulatory filings, with final approvals expected in 2026. Construction will commence after the project secures the remaining land rights and obtains the necessary regulatory approvals. Three Corners Connector could be operational as early as 2031.

Project Location

Three Corners Connector is 300 miles long, extending from an existing substation in Pueblo, Colorado, to a proposed substation near Guymon, Oklahoma. Converter stations will be constructed near each endpoint to convert the transported energy between alternating and direct current.

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Benefits

  • Three Corners Connector represents an approximately $2 billion investment total across Colorado and Oklahoma and will be a long-term asset for these states. The project will improve grid resiliency and provide economic benefits through tax revenue payments, landowner payments, and temporary and permanent job creation.
  • Three Corners Connector will enhance economic development by providing additional property tax revenue and community investment, supporting job creation, and increasing economic activity among local materials suppliers, professional services, and hospitality.
  • Three Corners Connector will benefit customers by providing access to low-cost energy resources by connecting the Eastern and Western Interconnections, in turn alleviating congestion, increasing reliability, and mitigating the impact of extreme weather events.
  • Three Corners Connector will enable strategic resource allocation and be an outlet for abundant generation in both Colorado and Oklahoma by providing power producers with access to new markets and allowing the export of power during periods of low demand.

Landowner Relations

Building strong and lasting relationships with landowners and communities is how Three Corners Connector approaches development. Three Corners Connector commits to a collaborative development process, and to conduct easement negotiations in a manner that is respectful of private property rights.

Uniting the Grid

The Eastern Interconnection, Western Interconnection, and the Electric Reliability Council of Texas (ERCOT) comprise the national power grid. These three parts operate largely independent of one another with insufficient connections between them. With energy demand increasing, the fractured grid is a bottleneck to ensuring energy reliability and security nationwide.

Our short video describes how America’s electric grid came to be and the solutions Grid United is driving forward – long-distance, high-voltage transmission lines to strengthen and modernize the electric grid.

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Developing America's Next-Generation Infrastructure to Power Our Future.

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Grid United is developing Three Corners Connector.

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