Project Title

Silver Rock Transmission

Sector

Sector:Electricity Transmission

Type:Electricity Transmission (all)

 Project Location Address

 Coordinates

• Latitude: 39.504682
  Longitude: -112.780722
• Latitude: 35.838957
  Longitude: -114.994592

 Project Sponsor Contact Information

• Company Name/Agency: Silver Rock Transmission LLC
  Project Sponsor: Stephen Stoddard
  Street Address 1 : 1088 Sansome Street
  City: San Francisco
  State: California
  Zip Code: 99111
  POC Name: Stephen Stoddard
  POC Title: Environmental Manager
  POC Phone: 7135431010
  POC Email Address: stephen.stoddard@patternenergy.com

 Alternative Point Of Contact (Optional)

No 

 Project Purpose

The Silver Rock Transmission project’s (the Project) objectives are to:
• Provide a path to market for the next-generation geothermal developments in Central Utah, including those associated with Bureau of Land Management (BLM) geothermal leasing activities;
• The Project directly supports the goals outlined in Executive Order 14156 (“Declaring a National Energy Emergency”) and Secretary’s Order 3417 (“Addressing the National Energy Emergency”), which call for swift action to expand domestic energy infrastructure and secure reliable, diversified energy supply for the United States;
• The Project contributes to the federal mandate to “Unleash American Energy” (SO 3418), helping to mitigate risks associated with an intermittent and unreliable grid. It facilitates the integration of next-generation geothermal resources and strengthens the resilience of the national transmission network.
• Provide grid reliability benefits by connecting the electric grids in Utah and Nevada, providing access to additional generation sources in each State;
• Facilitate potential data center buildout in and around both Las Vegas and Salt Lake City by providing access to new and/or additional sources of power to each location, with the potential to add fiber infrastructure;
• Meet increasing customer demand and enhance electrical system reliability by reducing congestion, improving load balancing, and strengthening interregional transmission pathways between Utah and Nevada, consistent with state energy planning goals;
• Allow consumers access to domestic energy sources and contribute to complying with national energy policy;
• Provide system flexibility and increased access to the grid for third-party transmission users;
- Expand regional economic development through increased employment and enlargement of the property tax base; and
- Maintain the standard of living associated with highly reliable electricity service.
The Project is essential for enhancing regional energy reliability, accommodating future load growth, and supporting the integration of additional low-cost energy resources. It facilitates the interconnection of new generation to support load growth and aligns with national and state energy policies aimed at modernizing infrastructure and strengthening the energy grid. By addressing critical transmission needs, the Project offers a solution that advances economic development and long-term energy resilience. Additionally, it will improve energy security by reducing reliance on outdated infrastructure and increasing grid flexibility. The Project also facilitates BLM geothermal leasing activities in eastern Nevada and western Utah by providing a viable transmission path to market for next-generation geothermal developments, thereby supporting federal leasing objectives and unlocking access to high-capacity baseload resources on public lands.

 Project Description

In June 2025, we submitted the Standard Form 299 (SF-299) application to the Utah BLM as part of the Project’s permitting process. The Project is approximately 330-miles in length and would consist of one of three configurations: (A) two direct current (DC) and/or alternating current (AC) singe-circuit high-voltage transmission lines with a combined right-of-way (ROW) of 450 feet (i.e., two ROWs of 200 feet with a 50 foot spacing in between), (B) one DC and/or AC single circuit and one AC or DC double-circuit high voltage transmission line with a combined ROW of 550 feet (i.e., one ROW of 200 feet and one
ROW of 300 feet with a 50 foot spacing in between), or (C) one DC and/or AC double-circuit high-voltage transmission line with a ROW of 300 feet. Each of the foregoing transmission lines would have a nominal voltage of up to 600 kilovolts and would be located within a siting corridor of approximately 1,000 feet. One endpoint of the transmission line is located in a region that includes developing electric generation resources, such as geothermal energy. While geothermal is one of the potential sources supplying the system, the transmission infrastructure is designed to accommodate various energy sources for flexibility and reliability in meeting energy demands. This optionality allows for diverse energy inputs, supporting a resilient and adaptable grid.

 Technical and Financial Ability

Silver Rock Transmission LLC (Silver Rock), a subsidiary of Pattern Energy, a leading independent power producer and transmission developer, is equipped with the expertise to develop, finance, construct, operate, and maintain the Project. Through Pattern Energy, Silver Rock has access to a Pattern Energy team of seasoned professionals in permitting and compliance, project management, and energy generation and transmission infrastructure development, construction, and operation. Pattern Energy has successfully permitted, constructed, and operated major infrastructure projects nationwide, including hundreds of miles of high voltage transmission. Pattern Energy is the sole owner of the SunZia Transmission Project, currently under construction, which spans over 550 miles of HVDC transmission and includes two groundbreaking HVDC converter stations. The SunZia Transmission Project encompasses hundreds of miles on BLM land, ensuring compliance with federal and state regulations, including those set by the BLM. Through Pattern Energy, Silver Rock’s technical approach adheres to industry best practices, employing proven construction methods, advanced monitoring systems, and robust maintenance protocols to guarantee project success and environmental stewardship.
Over Pattern Energy’s 15-year history, the team has secured over sixty billion dollars in funding for our business and projects. This includes a recent capital raise of approximately $3.8 billion in 2023 to support the SunZia Transmission Project, one of the nation's largest transmission infrastructure projects. Pattern Energy has a proven track record of managing large-scale infrastructure investments and adhering to financial commitments, demonstrating our success. The total investment value of the Project, ranging from $2 to $8 billion, is contingent on the proposed configurations selected. Through Pattern Energy, Silver Rock is fully prepared to meet all obligations associated with the requested authorization and is committed to responsible project execution in alignment with BLM requirements and environmental standards.

Summary of Financing, Reviews and Authorizations

The Silver Rock Transmission Project will be financed through a combination of equity investment and loan commitments that will support both the construction and operational phases. A decommissioning bond will also be posted in accordance with BLM requirements to ensure financial assurance. The project qualifies as a “covered project” under FAST-41 through the Standard Pathway, as it is subject to the National Environmental Policy Act (NEPA), involves an investment exceeding $200 million, and does not seek abbreviated authorization or environmental review processes under any applicable law. An Environmental Impact Statement (EIS) will be required and will undergo Endangered Species Act (ESA) and Section 106 reviews as part of the federal permitting process.. Federal authorizations will be necessary from the BLM for right-of-way grants across federal lands, the Bureau of Reclamation (BOR) for potential crossings or impacts to BOR-managed lands or facilities, and the Department of Defense (DoD) due to the project’s proximity to military installations or airspace.

Project Assessment

The Project meets the definition of a covered project as defined in 42 U.S.C. §4370m(6)(A). The Project is within the electricity transmission sector. It meets all the criteria of the “Standard Pathway,” e.g. the Project is subject to the National Environmental Policy Act, will require an investment of more than $200,000,000, and does not seek “abbreviated authorization or environmental review processes” under any applicable law. The Project expects that the environmental review under NEPA will be an EIS with a NEPA schedule consistent with the current statutory limit of two years. Lastly, the project proponent is requesting coverage via submission of this FIN utilizing the online FIN submission tool.

Form Submitter Contact Information

• Name: Stephen Stoddard
  Title: Environmental Manager
  Work Phone: 7135431010
  Email Address: stephen.stoddard@patternenergy.com

Accept Agreement

Yes