Perhaps the most intriguing idea in the renewable-energy package promoted by General Assembly Republicans (see previous post) is the idea of converting abandoned coal mines into pumped storage generating units.
Dominion Virginia Power operates a pumped storage facility in Bath County. The facility has two reservoirs. During periods of high demand when the price of electricity is high, Dominion releases water from the upper reservoir into the lower; during periods of low demand when the price is low, the company pumps water back into the upper reservoir.
The idea is to replicate this process on a smaller scale inside old coal mines. Frankly, I’m having a hard time visualizing how this would work — the underground coal mines I’ve visited follow are as level as the coal seams they follow — but I’ll assume that proponents of the idea know much more about the subject than I do.
One advantage of using coal mines for pumped storage is that they use water already in the mines, and there is no need to dam a river or creek. Further, Terry Kilgore, R-Gate City, who sponsored the bill, envisions using wind or solar power to pump the water. You can’t get any greener than that.
Here’s the topper: Use the abundance of green power to sell big corporations on locating their data centers in Southwest Virginia. One of the Commonwealth of Virginia’s two data centers is located in Lebanon, Va., on the edge of the coalfields, and the Virginia Tobacco Region Revitalization Commission has invested heavily in equipping the region with the broadband access that any data center requires. High bandwidth and clean energy make a winning combination, the thinking goes.
Dominion, which already has a coal plant in Wise County, doesn’t have a specific project in mind, but says it is keenly interested in what Kilgore’s bill would allow, reports the Roanoke Times.
“This is a BIG deal longer-term in the coalfields,” Jack Kennedy, Wise County’s clerk of circuit court and regional technology advocate, told the Times. “It could lead to hundreds of millions in investment, maybe over $1 billion.”
Hope always springs eternal in Virginia’s suffering coalfield region. The idea of converting underground coal mines into pumped storage facilities sounds extremely conceptual, and the economics are far from proven. But you never know. If the idea does work, and if the region could attract a handful of data centers — stranger things have happened, Microsoft located a data center in Mecklenburg County — it could be a game-changer.