FERC facts

The TWE Project is under the jurisdiction of the Federal Energy Regulatory Commission. FERC is an independent agency that regulates the interstate transmission of electricity and regulates other energy infrastructure.

Information related to TransWest’s FERC filings for the TWE Project will be provided on this page as it becomes available.

FERC filings

Open Solicitation

• Dec. 11, 2020: TransWest submitted an “Application for authority to sell transmission service rights at negotiated rates, Request for approval of capacity allocation process, and request for waivers.” (Docket No. ER21-645-000)
• Feb. 26, 2021: FERC issued an “Order granting application.”
• Dec. 3, 2021: TransWest submitted its “Post-Open Solicitation compliance filing.”
• Feb. 16, 2022: FERC accepted TransWest’s filing as demonstrating compliance with the approved Open Solicitation process and selection criteria in an unpublished letter order.

Applicant Participating Transmission Owner Agreement

• Jan. 13, 2023: TransWest and the California Independent System Operator submitted an “Applicant Participating Transmission Owner Agreement.” (Docket No. ER23-838-000)
• March 14, 2023: FERC issued an “Order Accepting Applicant Participating Transmission Owner Agreement.”

Large Generator Interconnection Agreement

• July 3, 2025: TransWest, PCW and the California ISO submitted an executed Large Generator Interconnection Agreement. (Docket No. ER25-2784-000)
• Nov. 4, 2025: FERC accepted the Large Generator Interconnection Agreement. (Docket Nos. ER25-2784-000 and ER25-2784-001; unpublished letter order)

Transmission Owner Tariff

• Sept. 15, 2025: TransWest submitted its “Proposed Transmission Owner Tariff.” (Docket No. ER25-3433-000)
• Dec. 31, 2025: FERC accepted for filing the TO Tariff in an unpublished letter order.

TWE Project information

• The TWE Project is a new high-voltage interregional transmission system from Wyoming to the Desert Southwest region (California, Nevada, and Arizona). It will include three interconnected segments extending a total of 732 miles between Wyoming and Nevada.
• The TWE Project will consist of three linked segments that include: (1) a 405-mile, 3,000 MW, 500 kV high-voltage direct current (HVDC) system between Wyoming and Utah; (2) a 278-mile, 1,500 MW, 500 kV high-voltage alternating current (HVAC) transmission line between Utah and Nevada; and (3) a 49-mile, 1,680 MW, 500 kV HVAC transmission line in Nevada.
• Pending interconnection requests
• Wyoming: The TWE Project will interconnect to PacifiCorp’s Wyoming 500 kV transmission system.
• Utah: The TWE Project will interconnect to the Intermountain Power Agency’s Intermountain Power Project at its 345 kV Switchyard.
• Nevada: The TWE Project will interconnect to NV Energy’s 500 kV system and CAISO’s 500 kV system.