Dominion Virginia Power plans to build two new 230-kV transmission lines and a new substation in eastern Loudoun County, Va.
According to the Virginia State Corporation Commission’s (SCC) April 3 order, a public hearing will be held on the company’s application on June 4 in Leesburg, Va., and another on Aug. 15 in Richmond, Va.
According to the company’s application filed with the SCC in December 2011, Dominion Virginia Power plans to build a new overhead 230-kV double circuit transmission line, the Waxpool Loop, by cutting into the existing Brambleton-Beaumeade line at Waxpool Junction about 0.5 mile southwest of where the Brambleton-Beaumeade line crosses Waxpool Road and extending the new double circuit line about 1.5 miles to a new 230-34.5-kV Waxpool substation to be built on land in Loudoun County owned by the customer, Intergate.Ashburn I LLC.
In order to comply with mandatory NERC reliability standards, the company said it also plans to build one new overhead 230-kV transmission line, the Brambleton-BECO line, about 11.2 miles from the company’s existing Brambleton substation to a proposed expansion of the company’s existing BECO substation.
The proposed facilities must be in service by November 2013 to serve the customer’s new datacenter campus. Dominion Virginia Power also said the proposed new Brambleton-BECO line and expansion of the BECO substation are needed to assure that Dominion Virginia Power can continue to provide reliable service to its customers in the Ashburn area of Loudoun County.
Load flow models show that by the summer of 2014, the company’s transmission facilities will not meet federally mandated NERC reliability standards if the proposed new Brambleton-BECO line and BECO substation facilities are not in service. “The failure to address these projected NERC violations by the summer of 2014 timeframe could lead to service interruptions and potentially damage the company’s electrical facilities in this area, which could significantly impact electric service in this region,” the company added.
The need for the Brambleton-BECO line and BECO substation expansion is being driven by area load growth, including the addition of the customer’s datacenter load, the company said.
The company also said the estimated cost to build the project is about $48.9m in 2011 dollars, of which about $27.6m is for transmission line construction, about $12.1m is for transmission substation work and about $9.2m is for distribution substation work.
In a March 6 filing with the SCC, the state Department of Environmental Quality (DEQ) listed several recommendations for the SCC’s consideration, including conducting an on-site delineation of all wetlands and streams within the project area with verification by the U.S. Army Corps of Engineers, and following DEQ’s recommendations to avoid and minimize impacts to wetlands and streams.
Dominion Virginia Power is a subsidiary of Dominion Resources (NYSE:D)