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Hornbaker & Devlin Area
230 kV Electric Transmission Project
Overview
Dominion Energy proposes to construct a double-circuit 230 kV transmission line and switching station to support data center growth and increased reliability in the Prince William County Innovation Park and southern Data Center Opportunity Zone Overlay District.
The project involves building new 230 kV transmission lines. This includes:
- Tying in near the intersection of Wellington Road and Hansen Farm Road and running to an area northwest of the intersection of Hornbaker Road and Robertson Drive
- Routing from the Hornbaker Road and Robertson Drive area to the proposed Hornbaker Substation, located west of Hornbaker Road, north of the intersection with Discovery Boulevard
- Either a tie-in near the existing Wellington Substation to a future substation northwest of the intersection of Hornbaker Road and Robertson Drive
OR
a tie-in near the existing Hourglass Substation to the proposed Hornbaker Substation
Benefits
- Complies with mandatory standards to enable safety, reliability and to meet future energy needs
- Strengthens area reliability
- Strengthens operational flexibility
Maps
Here you will find iterations of the project's routing process. This includes routes we previously studied, but are no longer considering for various reasons and land use constraints surrounding viable routes.
- Hornbaker & Devlin area routes under consideration as of October 2024
This is the most current map for the project, showing transmission line routes Dominion Energy is still evaluating.- 230 kV Transmission Line Routing - Project Overview
- Transmission Line Routing North and South as of October 2024
These maps show zoomed in views of the Northern and Southern portions of the project. - Transmission Line Routing Environmental Considerations as of October 2024
- Transmission Line Routing North and South as of October 2024
- 230 kV Transmission Line Routing - Project Overview
- Hornbaker & Devlin area routes studied but no longer considered
These maps are previous iterations of the project and are no longer under consideration.- Rejected overhead routes - October 2024 (note: ONLY the black lines on this map are no longer considered)
- Rejected underground routes - October 2024
- Project map - July 2023
- Project map - land use constraints
- Photo simulations - July 2023
- Rejected routes
GeoVoice
Explore GeoVoice, an interactive mapping tool. GeoVoice allows you to:
- Search for your address
- Explore proposed project routes
- View visual simulations
- Send comments to the project team—you will need to create an account to log in and submit your comments
Legal
The Virginia State Corporation Commission (SCC) is responsible for verifying the need, approving the route and structures, and reviewing the environmental impact of certain transmission lines in Virginia.
On March 14, 2025, Dominion Energy filed its application with the SCC. Documents related to the case are available to the public on the SCC Docket of the SCC website. You may search by Case No. PUR-2025-00046 in the "Search Cases" section. In addition, interested parties may visit the SCC Case Comments Page where individual mailboxes are available for each case accepting public comments.
Application Documents:
Meetings
Dominion Energy held two community meetings on October 29 and 30. If you would like to provide feedback to the project team, there are a few ways you can do so:
- Online via the GeoVoice interactive mapping platform
- By phone at 888-291-0190
- By email at powerline@dominionenergy.com
Timeline
2025
March 14, 2025
File application with the State Corporation Commission
2024
October 29 & 30, 2024
Public community meetings
2023
Fall 2023–Fall 2024
Continued project evaluation and incorporation of Devlin area transmission needs
Summer 2023
Initial project evaluation and community meeting
Construction-Related Impact
Service Interruption
Your electric service is not expected to be impacted by this project.
Traffic
There may be some traffic delays.
Noise
Noise levels will be moderate; permits are in place.
Environment
This project will not have environmental impacts.
Neighborhood
Access to surrounding neighborhoods will not be impacted.
Powerlines 101 - Learning Zone
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