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Watch the March 11, 2021 Milestone Update Video

In order to keep our neighbors informed about the construction process for this project, a new interactive web portal is now accessible.

Watch the March 31, 2021 Project Update and Independent Review from MPR

Watch the May 3, 2021 Horizontal Directional Drilling Delays Project Update Video

Access the interactive web portal


  • May 2020 - Postcard mailed to the community announcing permit approvals and start of construction
  • October 15, 2019 - Construction Informational Open House (5:30 pm - 7:30 pm) Kilmer Middle School, 8100 Wolftrap Road, Vienna, VA 22182
  • September 5, 2018 - The SCC issued its final order approving the Idylwood-Tysons transmission project.
  • July 26, 2018 - The SCC Hearing Examiner’s Report was issued in response to the proposed project.
  • February 16, 2018 - SCC Hearing Examiner grants Fairfax County’s motion for extension of the procedural schedule.
  • December 8, 2017 - The SCC issued its Procedural Order for the proposed Idylwood-Tysons project.
  • November 8, 2017 - We filed an application for a Certificate of Public Convenience and Necessity with the Virginia State Corporation Commission (SCC) for a new 230 kilovolt (kV) line between our existing Idylwood and Tysons substations in Fairfax County.

Overview & Project Description

By approximately 2022, load on the existing lines in the Tysons and McLean areas of Fairfax County is forecast to exceed 300 megawatts. By constructing an additional source of power, Dominion Energy will avoid a potential violation of mandatory North American Electric Reliability Corporation (NERC) reliability standards. The Idylwood-Tysons 230 kilovolt (kV) Project is being proposed to enable Dominion Energy to continue to provide reliable power to the area.

Community Engagement

At Dominion Energy, we are committed to keeping our neighbors informed about energy needs where they live and work. As we continue to analyze the various components of the proposed project, it is important that we not only keep you informed, but we hear your feedback.

As the project develops, we will:

  • Continue outreach by communicating with legislators, homeowner associations and other identified stakeholders; and
  • Provide ongoing communications through informational materials, mailings, email updates and a project website.

Focus Groups


  • *Updated* 2022 – Project need date
  • March 2020 – Obtained construction general permits for trenching and horizontal directional drilling (HDD) sections
  • Sept. 5, 2018 – SCC Final Order of approval issued
  • June 12, 2018 – Evidentiary Hearing will begin at 10:00 am
  • May 08, 2018 – Public Evidentiary Hearing, 10:00 am, SCC, Richmond, VA - receiving public witnesses
  • May 01, 2018 – Public Comments - Extended to June 1, 2018
  • April 12, 2018 – Dominion Energy Rebuttal due - Extended to May 11, 2018
  • March 27, 2018 – SCC Staff Report due - Extended to April 27, 2018
  • February 26, 2018 – Local Public Hearing – Shrevewood Elementary School, Falls Church, VA, 7:00 pm
  • February 9, 2018 – Notices of Participation
  • January 26, 2018 – Landowner, Gov’t Official and Public Notice
  • November 8, 2017 – File application with the VA State Corporation Commission
  • October 5, 2017 – Focus Group #3
  • September 26 & 28 - Open Houses
  • August 24, 2017 – Focus Group #2
  • July 27, 2017 – Focus Group #1
  • Spring 2017 – Outreach to local legislators

SCC Applications

The State Corporation Commission (SCC) is responsible for verifying the need, determining the route and reviewing the environmental impact of certain transmission lines in Virginia.

Application Documents


The project team worked with the local community to develop our route recommendation to the Virginia State Corporation Commission. Through two open houses held in Sept. 2017 and one held in Oct. 2019, the public met with our subject matter experts to learn details on the project. As we begin various components of the proposed project, it is important that we not only keep you informed, but we hear your feedback. We invite you to follow the progress of each phase and receive up-to-date project information, including allowable work hours, on our new and interactive web portal.

In addition, you may also contact us and add your address and email to our distribution list.

The new transmission line is being developed in a heavily populated, urban area. The decision to propose an underground line was influenced by space limitations and the potential to require a large amount of new right-of-way which would pose significant impacts on residences, wetlands, parks, and conservation easements.

The Virginia State Corporation Commission Guidelines of Minimum Requirements for Transmission Line Applications Filed Under Virginia Code Section 56-46.1 and The Utility Facilities Act require the Company to provide routing information on viable alternatives. Our legal interpretation of these guidelines, combined with decades of regulatory precedent, confirm that analysis of a viable overhead route must be included in the application if one exists.
As part of our regulatory applications, Dominion Energy completes an evaluation of potential environmental, cultural, and historical impacts of the project. Dominion Energy works with local and state agencies to complete these evaluations and mitigate any impacts. All required permits are obtained and permitting conditions are met. Permitting agencies typically include the US.
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