Dominion to expand substation

Dominion Energy plans to start work on upgrading the Westcott Substation in late spring. The facility is on the Holmes Run Stream Valley trail near Rose Lane Park in Annandale.

Dominion crews will install new technology and expand a portion of the fenced station area by approximately 57 by 70 feet.

There will be increased construction and foot traffic in the area until the project is completed in fall 2025. The trail will be temporarily closed at times during construction. Signs will be posted in advance of the closures.

According to a postcard sent to nearby residents, the upgrade is part of Dominion’s grid transformation plan, “which will modernize electric infrastructure and support integration of renewable energy resources onto the electric grid.”

The upgrades will help maintain voltage stability, improve reliability and power quality, and increase overall visibility of grid operations, Dominion states. These improvements will help with outage response, renewable resource integration, and electric vehicle charging.

The Westcott Substation serves over 3,000 customers.