In 2014, our team began work to address a forecasted reliability
concern in the Alexandria-Arlington-Fairfax area, and proposed a new
Glebe-Potomac River line project. Updated data on the need for the
original project has changed and no longer requires a new line, but
requires work at two of our existing facilities in Arlington and
Alexandria.
In July 2018, Dominion Energy received an updated base case study from
PJM, a regional transmission organization, on load projections through
2023. This updated study revealed several changes to the electrical
planning horizon - removing the need for certain work.
In addition to changing the need and scope of the solution, cost was
also significantly impacted. Specifically, the estimated cost of the
Rebuild Solution decreased from approximately $290 million to
approximately $170 million. Alternately, the total estimated cost for
the New Line Solution is approximately $340 million.
Following these changes, the New Line is no longer a justifiable solution for the current capacity need.
The current solution calls for Dominion Energy to rebuild its existing
Glebe Substation and underground the North Potomac Yards Terminal
Station.
