PacifiCorp works out interconnect deal for Dugway power project

PacifiCorp on Sept. 17 filed with the Federal Energy Regulatory Commission a Small Generator Interconnection Agreement with the military’s Dugway Proving Ground for a 2-MW generating facility.

This facility would consist of four Solectria SGI 500XTM 500 kVA inverters fed through a 380 V-12.47 kV transformer located in Tooele County, Utah. The project’s Point of Interconnection is at the Dugway substation. The project’s commercial operations target date is March 1, 2016.

A project contact listed in the agreement is: Michael Wilkinson, Dugway Proving Ground, IMDU-PWF, Bldg 5330, Rm 2408, Dugway, Utah 84022,

The U.S. Army’s Dugway Proving Ground provides testing and support for the country to counter chemical, biological, radiological, and explosives hazards.

The Army said in an Aug. 6 statement that construction is underway at the Dugway Proving Ground on a 2-MW solar project. The $7.7 million solar power array began construction this summer near the substation at English Village’s housing and administration area.

“Energy security is vital for the Army mission at Dugway. With aging infrastructure of the commercial power grid and frequent power outages it’s critical we look at alternate methods to insure an uninterrupted power source, “said Don Smith, Dugway’s new garrison manager. “Solar power is an excellent way to achieve a degree of energy independence and protect the Army’s mission.”

This is part of a much wider Army goal for environmental sustainability in all its area facilities. The 2007 National Defense Authorization Act requires the Army to consume 25% of electricity requirements from renewable sources, by 2025.

The array’s 2 MW of solar photovoltaic cells will generate about 3,990 megawatt-hours of power annually, enough to power more than 500 homes, according to the U.S. Army Corps of Engineers. Once operational, the array is expected to generate about 10% of the electricity needs, or about 4.5% of the total installation energy.

Approximately 400 acres have been approved for solar development at on the installation, including English Village (325 acres total), and the Ditto area (75 acres). “A second solar 2-megawatt array near the test center will strengthen our energy security posture,” Smith said.

In addition to solar, Dugway is working on a number of energy projects including wind and geothermal energy. The Army installation is also considering a micro-grid control system to combine various energy resources to form an integrated system.

TriEco-Tetra Tech Sustainable Resources Joint Venture of San Diego was awarded the contract by the Corps of Engineers. Hunt Electrical of Salt Lake City is also part of the construction team.

About Barry Cassell 20414 Articles
Barry Cassell is Chief Analyst for GenerationHub covering coal and emission controls issues, projects and policy. He has covered the coal and power generation industry for more than 24 years, beginning in November 2011 at GenerationHub and prior to that as editor of SNL Energy’s Coal Report. He was formerly with Coal Outlook for 15 years as the publication’s editor and contributing writer, and prior to that he was editor of Coal & Synfuels Technology and associate editor of The Energy Report. He has a bachelor’s degree from Central Michigan University.