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Oregon greenlights one of the largest solar and storage projects in the US

Renewable energy developer, financer, and operator Pine Gate Renewables has been granted permission from the Oregon Energy Facility Siting Council to construct the state’s largest solar array and a battery energy storage system.

At its November 14 meeting, the council approved the Final Order on the Application for Site Certificate (ASC) for the Sunstone Solar Project, formerly known as Echo Solar, shortly thereafter issuing a site certificate for the construction, operation, and retirement of the facility in Morrow County, Oregon.

A map indicating the location of Pine Gate’s Sunstone Solar Project. Courtesy: Oregon Energy Facility Siting Council

If built to its intended capacity, Sunstone Solar will be one of the largest, if not the largest, renewable energy projects in the United States. It is planned to have up to 1.2 gigawatts (GW) of generating capacity via nearly 4 million solar panels and up to 7,200 megawatt hours (MWh) of paired battery energy storage. The site is expected to provide clean, renewable power for up to 800,000 homes.

Construction on the project will include building an interconnection substation, up to six collector substations, up to four operations and maintenance (O&M) facilities, and up to 9.5 miles of 230-kilovolt (kV) overhead transmission lines, in addition to other structural work including roads, fencing, and gates.

Farming the sun
Sunstone will take a large chunk of usable farmland out of production. It is authorized to occupy up to approximately 9,442 acres (14.75 sq. miles) of private land zoned for Exclusive Farm Use within an approximately 10,960-acre (17-sq. mile) site, which is about 15 miles northeast of Lexington, OR.

The Oregonian notes the area has been cultivated in dryland winter wheat, and more than half of the site is considered “high-value” farmland. The state cracked down on solar siting in such places five years ago, but large-scale projects have found ways around restrictions by proving a site’s potential economic benefits to the local economy and mitigating the total loss of farmland.

Another project developer, owner, and operator, Doral Renewables, is plenty familiar with the arithmetic necessary to get projects approved while still maintaining critical agriculture. Doral just finished the first 400 MW phase of the colossal Mammoth Solar in Indiana, which will have 1.3 GW of clean capacity by the time it’s finished. Doral president and CEO Nick Cohen approaches the farmland conundrum with a clever line of thinking.

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